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Publication numberUS2268925 A
Publication typeGrant
Publication dateJan 6, 1942
Filing dateSep 4, 1940
Priority dateSep 4, 1940
Publication numberUS 2268925 A, US 2268925A, US-A-2268925, US2268925 A, US2268925A
InventorsBenjamin Cooper
Original AssigneeBenjamin Cooper
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Traffic counting circuits
US 2268925 A
Abstract  available in
Images(3)
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Claims  available in
Description  (OCR text may contain errors)

Jan. 6, 1942.

B. COOPER TRAFFIC COUNTING CRCUITS 3 Sheets-Sheet l Filed Sept. 4, 1940 Q T EN /Q b" N v Tv muv . mu Q* hb @C 5m:

4Jam. 6, 1942.

B. COOPER' TRAFFIC COUNTING CIRCUITS 3 Sheets-Sheet 2 Filed Sept.

O o VVENTOR.

.en/am zn 0010er BY fg' [A ATTORYEY.

AIV @N Jan. 6, 1942. B. COOPER TRAFFC COUNTING CIRCUITS 3 Sheets-sheet 3 Filed Sept. 4, 1940 @wi MNE INVENTOR.

j@ ATTORNEY.

Patented Jan. 6, 1942 UNITED STATES PATENT CFFICEv Y TRAFFIC COUNTING CIRCUITS BenJamin Cooper, Jersey City, N. J.

Application September 4, 1940, Serial No. 355,330

(Cl. 23S-.92)

. 30 Claims.

This invention relates to tramo counting circuits. It is particularly directed to improved means' for counting and totalizing, on a single counter, the vehicular trame on a multi-lane highway. l

This application is a.` continuation in part of applicant's co-pending application, Serial No. 265,290, filed on March 3l, 1939 for Trafllc counting circuits.

Heretofo're, in trame counting installations onl a multi-lane highway, a treadle switch was ernbedded in each lane of the highway for actuation by the wheels of a vehicle, and each treadle controlled a circuit operating a counter to count the vehicle axles passing over the said lane. In such installations it was necessary to add the counts oi' each counter in order to obtain the total count in all lanes. Furthermore, the initial cost oi such installations proved expensive, and the operating expenses attached thereto also proved to be slightly higher than most road authorities had anticipated.

In the installation of traffic counting systems it has been found that vehicles will often come to a standstill with either the front or rear wheels resting on the treadle. thereby holding the treadle switch closed, sometimes for long periods, impressing a continuous impulse on the counting circuit, instead of a momentary impulse as when the wheels of a vehicle roll over the treadle. Furthermore, vehicles usually cross the treadles in the diilere'nt lanes, simultaneously or substantially so, so that the time between actuation of treadles is less than it takes to operate a counter.

It is, therefore, an object of this invention to provide for a multi-lane highway, having a treadle switch embedded in each lane, a trame counting circuit for registering on a counter con- ,Y

trolled by a single electro-magnet, the total count of all vehicle axles which pass over the treadle switches in the lanes, irrespective of the duration of the actuation of the treadle switches, said circuit including means for registering on the counter the simultaneous actuations of two or more treadle switches in the various lanes, or any actuations of switches separated by a period less than is required to operate the counter.

Another object of this invention is to provide in a counting circuit of the character described, means to prevent the registration of theactuation of a treadle switch unless said treadle switch is restored to its initial condition. l

It is very often desirable to. count vehicles rather than vehicle axles. As the number of three-axled vehicles are negligible when compared to the number of two-axled vehicles, a counting circuit which' will allow the registration of one count on the counter for each two actuations oi' a treadle switch will give an accurate vehicle count, especially on our motor parkways, toll bridges and tunnels, and in our national and state parks where two-axled vehicles predominate.

It is, therefore, still a further -object of this invention to provide in a counting circuit of the character described, means to actuate the totalizing counter only once for the passage oi' two vehicle axles over the treadles in the lanes, said circuit including further means to prevent the registration of false counts on said counter irrespective of the duration of closures of the treadle switches.

On some highways there are lanes for trame in one direction only, and common lanes for twoway trame. Thus. in a three-lane highway, one outside lane is-used for traiilc in one direction. and the other outside lane is used for traiilc in the opposite direction, while the center lane may be used i'or traiilc movingv in either direction.

It is, therefore, still another object o1' this invention to provide a tratlic counting circuit of the character described, to count the vehicle traillc moving in one direction on one counter, and to count the vehicle tramo moving in the opposite direction on another counter, said circuit including means to register on the proper directional counter the traillcmoving in either direction in lanes used in common on which trame may move in either direction.

Anotherobject of this invention is to provide a counting circuit of the character described which may be readily'expanded to use any desired number of switches, and which maybe readily reduced to as i'ew switches as desired.

Another object of this invention is to produce a highly improved circuit oi' the character described which shall be relatively inexpensive to manufacture, positive in operation, and practical and eiilcient to a high degree in use.

Other objects of this invention will, in part, become obvious and, in part, be hereinafter pointed out.

This invention accordingly consists in features oi' construction, combination of elements, and arrangement ofparts which are exemplified in construction hereinafter described, and of which the scop of this application will be indicated in the following claims.

In the accompanying drawings,

Fig. l is a wiring diagram of a counting circuit embodying the invention for totaiizing traffic in aplurality of lanes;

Fig. 2 is a wiring diagram of a counting circuit embodying the invention for totalizing trafiic in a plurality ot lanes, and adapted to count every other vehicle axle; and

Fig. 3 is a wiring diagram of a counting circuit embodying the invention for totalizing traii'ic on a three-lane highway wherein the center lane may be used by vehicles passing in either di rection. I-

Referring now in detail to Fig. 1 of the drawings, there is illustrated a circuit embodying the invention comprising single switch treadles, A, B, C, and D, of any suitable construction embedded, one in each of they lanes of a highway, traversely of thelane. Each treadle switch com'- prises two contacts .Ai-A2, BI-B2, CI-C2, and Di--D2, respectively. Each switch may comprise a pair Aof long metallic top and bottom strips normally out of contact and positioned perpen= dicularly to the normal direction of vehicular vtrafflcso that a wheel passing over one o the treadle switches will press the two contacts thereof together and close the switch, the switch opening when the wheel rolls oli the treadle.

Associated with each treadie A, B, C, and D are three relays numbered A3, Ali! and A29; B3,

BI@ and B20; C3, CI9 and C2i); and D3, Di@ and I D20, respectively.v For purposes hereinafter appearing, the relays A3, B3, C3 and D3 will be referred toas operating relays, relays Alti, Bit. Cit and Dill will be referred to as primary relays, and relaysy A20, B29, C2@- and D29 will be referred to as secondary relays.

Operating relays A3, BB, C3 and D3 have actuating coils A6, B4, Cd and Dt, respectively. Primary relays AIU, Biil, Ci@ and Dit have actuating coils Ai I, BI I, CI i, and Di i, respectively; and the secondary -relaysAZiL B2, C22, and D29 have actuating coils A2i, B2i, C2i and D2i, respectively.

Associated with each of the operating relays A3, B3, and C3 are three switch arms adapted to be actuated by their respective relays. The following description is limited to the purposes and operation of but two switches; the purpose and operation of the third switch arm will be hereinafter disclosed.

Associated with operating relay A3 are two switch arms A5 and A9. Switch arm A5 is normally open and is adapted to engage iixed contact A6 when the relay A3 is energized. Switch arm A9 is normally in engagement with fixed contact AI 9 but is adapted to be moved into open position when said relay is energized.

y Associated with the operating relay B3 are two switch arms B5 and B9. Switch arm B5 is normally open and is adapted to engage the fixed contact B6 upon energization of relay B3. Switch arm B9 is normally in engagement with xed' contact BI9 and is adapted to be moved into open position when said relay is energized.

Associated with relay C3 are two switch arms C5 and C9. Switch arm C5 is normally open and is adapted to engage iixed contact C6 upon energizing said-relay. Switch arm C9 normally engages xed contact CIB and is adapted to be moved into open position upon energizing said relay.

Associated with the operating relay D3 are two switch arms D5 and D9. Switch arm D5 is normally open and adapted to engage fixed contact D8 upon energizing the relay and switch arm D9 is normally in engagement with fixed contact DI 9 and adapted to be moved into open position upon energizing said relay.

Associated with the primary relay AIG are the three switch arms AI2, Ait and Ait. Switch armAiZ is normally in engagement with fixed contact AIS and is adapted to be moved into open position upon energizing relay Ai. Switch arm Aid is normally in open position and is adapted to engage fixed contact Ait upon energizing said relay.v Switch arm Ait is normally in engagement with xed contact AIS and is adapted to be moved into open position in respect therewith and into engagement with fixed contact Ai i upon energizing said relay.

Associated with the relay Biti are three switch arms BH2, Bid and Bit. Switch arm BI2 normally engages xed contact BIS and is adapted to be moved into open position upon energizing relay Biti. Switch arm Bid is normally in open position and adapted to engage iixed contact BI! upon energizing the relay. Switch arm BIG normally engages iixed contact Bia and is adapted to be moved out of engagement therewith and into engagement with iixed contact Ai i upon energizing said relay.

Associated withthe primary relay Ci il are three switch arms Ci2, Cii and Cit. Switch arm CI2 normally engages iixed contact Cit and is adapted to be moved into open position upon energizing relay CI. Switch arm Citi is normally in open position and is adapted to engage fixed contact C i5 upon energizing said relay. Switch arm CIS normally engages fixed contact CES and is adapted to be moved out of engagement therewith and into engagement with fixed contact Cil upon en'- ergizing said relay.

Associated with the primary relay Di@ are` also three switch arms Di2, Dit and DIE.' Switch arm Di2 normally engages fixed contact Di3 and is adapted to be moved into open position upon energizing relay Di. Switch arm Dit is normally in open position and is adapted to engage xed contact Di5 upon energizing said relay. Switch arm Dit is normally in open position and is adapted to engage fixed contact Dii upon energizing said relay.

Associated with the secondary relay A29 are four switch arms A22, A26, A25 and A28. Switch arms A22 and A26 normally engage fixed contacts A23 and A2i, respectively, and are adapted to be moved into open position upon energizatlon of the relay. Switch arms A29 and A28 are normally in open position and are adapted to engage xed contacts A25 and A29 respectively upon energization of said relay.

Associated with the secondary relay B29 are ve switch arms B36, B22, B24, B26 and B28. Switch arms B36, B22 and B26 normally engage fixed contacts B35, B23 and B27, respectively, and are adapted to be moved into open position upon energizing relay B29. Switch arms B24 and B28 are normally in open position and are adapted to engage xed contacts B25 and B29, respectively, upon energizing said relay. Y

Associated with secondary relay C20 are also live switch arms C36, C22, C24, C26 and C29. Switch arms C35, C22 and C26 normally engage iixed contacts C35, C23, and C21, respectively. and are adapted to be moved into open position upon energizing the relay. Switch arms C24 and C29 are normally in open position and are adapted to engage fixed contacts C25 and C29, respectively, upon energizing said relay.

Associated with the secondary relay D are four switch arms D38, D24, D26 and D28. Switch arms D36 and D21 normally engage fixed contacts D38 and D31, respectively, and are adapted to be moved into open position upon energizing the relay. Switch arms D24 and D28 are normally open and adapted to engage fixed contacts D and D29, respectively, upon energizing said relay.

It will be noted that the 'secondary relays of the first and last treadles each control four switches, whereas the secondary relays of intermediate treadles each control iive switches.

In the circuit there is provided an electromagnetic counter E of any suitable construction, having an electro-magnet provided with the actuating coil 3I and controlling the counting mechanism 32. Associated with the electromagnet 30 is a switch arm 34 normally engaging xed contact 33 and adapted to be moved into open position upon energization of said electromagnet.

The contact strips AI, BI, CI, and DI are connected to negative power supply. The other contact strips A2, B2', C2 and D2 are connected by wires A31, B31, C31 and D31 to the coils A4, B4, C4 and D4, espectively. 'I'he other ends of coils A4, B4, C4 and D4 are connected to plus power supply.

Fixed contacts A6, B6, C6 and D6 are connected to minus power supply. Switch arms A5, B5, C5 and`D5 are connected by wires A38, B38, C38 and D38 to the coils AII, BII, CII and DII, respectively. Switch arms A9, B3, C9 and D9 are connected by wires A39, B39, C33 and D33, to the fixed contacts All, BI1, CI1 and DI1, respectively. Contacts AI9, BI 3, CI9 and DI 3 are connected by wires A40, B40, C and D40 to the coils A2I, B2I, C2I and D2I, respectively.

The other end of each of coils All, BII, CII and DII is connected to plus power supply. The fixed contacts AI3, BI3, CI3 and DI3 are connected to minus power supply. The switch arms AI2, BI2, CI2 and DI2 are connected by`wires A44, B44, C44 and D44 to the iixed contacts A25, B25, C25 and D25, respectively. Switch arms AI4, BI4, CI4 and DI4 are connected by wires A45, B45, C and D45 to the fixed contacts A21, B21, C21 and D21, respectively. Fixed contacts AI5, BI5, CI5 and DI5, are connected to the coils AII, BII, CII and DII, respectively. Fixed contacts AIB, BI8 and CIB are connected by wires A41, B41 and C41 to the switch arms A22, B22, and C22, respectively.

The switch arm AIS is connected by the wire A43 and wire 48 to the fixed contact 33 and by the wire A43 and wire A49 to the fixed contact A29. The switch arms BI6 and CI6 are connected by the wires B43 and C43 and wires 50 and 5I to the iixed contacts A23 and B22, respectively. Switch arm DI6 is connected by wire 52 to a iixed Contact C23.

The switch arms A24, B24, C24 and D24 are connected by wires A54, B54, C54 and D54, re-

Vspectively, and by wires and 56 to coil 3| of the counter E. The switch arms A26, B26, C26 and D26 are connected to minus power supply. Switch' arms A28, B28, C28 and D28 are connected by wires A51, B51, C51 and D51 to the wires A40, B40, C40 and D40, respectively. The fixed contacts B29, C29 and D29 are connected by wires B58, C58 and D58 to the wire 48 which leads to the fixed contact 33.

Switch arms B36 and C36 are connected by of the electro-magnet 30 to plus power supply,

wires 6I and 62 to the fixed contacts C36 and D35, respectively. Coil A2I is connected by wire to the iixed contact B35; coil B2I is connected by wire 6I to the iixed contact C36; coil C2I is` connected by wire 62 to the xed contact D35 and coil D2I is connected to the switch arm D36. Switch arm D35 is connected to plus power supply- For purposes hereinafter appearing, the two circuits appearing in heavier lines in Fig. l, will be known as chain circuits. The circuit emanating from the negative power supply and traceable through switch 34-33, wires 48 and A43, switch AI 6-AI8, wire A41, switch A22-A23, wires 50 and B43, switch BI6-BI8, wire B41, switch B22B23, wires 5I and C43, switch CI6-CI8, wire C41, switch C22-C23, wire 52 to switch arm DI 6, will be referred to as the negative chain. The circuit emanating from the positive power supply and traceable through switch D36--D35, wire 62, switch C36-C35, wire 6I, switch E36-B35, and wire 60 to one side of coil A2I will be referred to as the positive chain.

The operation of the circuit will now be described when a vehicle wheel passes over and closes any treadle switch, such as-C.

When treadle circuit C is closed relay C3 becomes energized, the circuit being through wire C31 and coil C4. Switch C9-CI9 opens and switch C5-C6 closes, completing a circuit from minus power supply through wire C38 and coil CII to plus power supply energizing the primary relay C I 0.

Energizing the primary relay CID will open switches CI2-CI3 and CIB-CIB and close the switches CI4-CI5 and CI6-CI1. Closing switch CI4-CI5 completes a holding circuit for coil CII, the circuit being through switch CI4-CI5, wire C45, switch OZB-C21, to minus power supply, thereby maintaining relay CII) energized after the wheels of a vehicle roll over the treadle allowing the switch C I-C2 to open.

Opening the treadle switch C will allow the operating relay C3 to become de-energized permitting switch CSi-CIS to close. Closing of switch C9-CI3 will energize the secondary relay C20, by connecting one end of the coil C2I of said relay to the negative chain heretofore described. The circuit connection to the negative chain oi' coil C2I is through the wire C40, the switch C9-CI9, wire C39, switch CI6-CI1 and wire 5I.

The other end of coil C2I is connected to the wire 62 of the positive chain heretofore described.

It will be noted that to energize the secondary relay C20, treadle switch C must open to allow operating relay C3 to become de-energized thereby permitting switch C9-CI9 to close, to complete the energizing circuit for the secondary relay.

Energizing the secondary relay C20 will close the switches C24-C25 and C28-C29 and open the switch C26-C21, By closing switch C28-C29 a holding circuit is completed to hold relay C20 energized when primary relay CIO becomes deenergized, the circuit being from the coil C2I of said relay, through the wires C40 and C51, switch 028-029, wire C58 to wire 48 of the negative chain. Opening switch C2G-C21 wili open the holding circuit of the primary relay CIO allowing said relay to become fie-energized.

By de-energizing the primary relay CID, switch CI2-CI3l closes completing a circuit to actuate the counter E. The completed circuit is from minus power supply, switch CI2-CI3, wire C44, switch C24-C25, wires C54, 55 and 56, coil 3l The electro-magnet 30 actuates the counting mechanism 32,' thereby registering one count on the counter E ior the passage of a wheel over the treadle C.

By energizing the electro-magnet 3|. switch 34-33 opens, thereby opening the circuit of the negative chain. 'I'he secondary relay C20 becomes de-energized allowing switch C24-C25 to .again open. By opening switch C24-C26, the circuit of the counter coil 3i will be opened, permitting the de-energization of the said coil. Thus, the entire counting circuit is restored to normal for reactuation by the closure oi another treadle.

It will be noted that the procedure for actuating/the counter comprises briefly the following: nrstly, the actuation of any treadle excites the corresponding operating relay, said relay closing a. circuit to energize its corresponding primary relay; secondly, the energization of the primary relay completes a holding circuit for itself through a switch arm controlled by its associated unexcited secondary relay; thirdly, the energization of the primary relay energizes its associated secondary relay, provided the positive and negative chains are in condition to permit said energization, as heretofore explained; Iourthly, the energization of the secondary relay causes the de-energization of its associated primary relay, thereby completing a circuitthrough a counter' coil and permitting registration of an axle count on the counter; and flfthly, the actuation of the counter resets the circuit for further operation by another set of vehicle wheels.

If two treadles are actuated, one as soon after the other that the counter does not complete the count of the irst actuation before the second treadle is actuated, the counter will nevertheless count the actuations in sequence.

The operation of the counting circuit will now be described when a treadle is actuated so soon after actuation of another treadle that the secondary relay, associated with the other treadle, ls still energized. Assuming that treadle switch B is closed while secondary relay C20 is energized, due to' a prior actuation of treadle C, said closure of treadle B energizes relay B3 to energize the primary relay Bill, said primary relay then being held excited through switches Bid- BIS and B2S-B2i. However, since the positive chain has been disrupted at switch C35-C35 by the now energized relay C20, relay B20 cannot be energized and relay Bill remains energized after treadle switch C is released. However, as soon as relay C20 actuates the counter, and is released by opening of switch 34-33, the positive chain is re-established at switch CSS-C35. Relay B20 is then able to become energized for releasing its primary relay Bi0,

and two treadles are actuated close together, the secondary relays for said treadles are energized successively in the order in which the treadles are closed.

The circuit will also count simultaneous actu-A ations of the treadles.

The operation of the circuit will now be described when several treadles, such as B, C, and D are operated simultaneously. In a manner similar to that heretofore described, the operating relays B3, C3 and D3 will be energized, energizing their respective primary relays Bl0, Ci@ and Dit?. Since none of the secondary relays have yet been energized, the positive chain has not been disrupted, but the negative chain is complete only to switch arm EEO, thereby allowing only relay B20 to become energized. The primary relays C I 0 and Di 0 accordingly will both remain energized under the inuence of their respective holding circuits, as heretofore described, ater their treadle switches are released. As relay B20 en ergizes, it opens the negative chain at switch B22, B23, thereby preventing relay C20 from energizing until relay B20 has energized the counter and become de-energized. Relay C20 is then allowed to energize, to operate the counter while holding oi the energization of relay D20 in a similar manner. Lastly, the secondary relay D20 is allowed to become energized to operate the counter, thereby completing the registration of three axle counts for the three treadles simultaneously actuated.

Thus, as several treadles are simultaneously actuated, the secondary relays associated therewith are energized in a predetermined order to operate the counting mechanism.

This invention, comprising the totalizing counting circuit as disclosed in Fig. l, may be expanded or reduced to include any number of In a very similar manner, if treadle D had been closed instead of B while relay C20 is energized, the operating relay D3 would be energized, energizing the primary relay DIO. However, since the negative chain is broken at switch C22-23, secondary relay D20 will not be energized until relay C20 has actuated the counter and de-energized, allowing the negative chain to be re-established as far as switch arm DIS. Relay D20 will then be energized and actuate the counter E registering the second count.

counting stations. To expand the circuit, it is necessary only to extend the positive and negative chains to include as many counting stations as desired. The operating relays and the primary and secondary relays of additional stations are interconnected with the counter and the treadles in a manner similar to that described and shown in the drawings, the rst and last stations being similar to stations A and D, and the intermediary stations being similar to stations B and C.

It will now be noted that only one count is made on the counter for one actuation of a treadle switch irrespective of the duration of the actuation.

Should any of the treadle switches be closed, such as B, for any considerable length of time, the operating relay B3 will be energized and remain energized as longvas treadle switchB is closed. 'I'he primary relay Bi0 becomes \ener gized in the manner heretofore described, closing the switch BIG-Bil, thereby continuing the 1xesgative chain through wire B30 to switch arm One end of coil B2i is connected to wire 6| of the positive chain while the other end of said coil is connected by wire B40 to the fixed con- Thus. when the circuit is previously inactive tact BIS.' Due to the energized condition of relay B3, switch BB-BI9 is held open thereby preventing the connection of the coil B2i into the negative chain. Upon opening treadle switch B, the operating relay B3 will become de-energized thereby permitting the energization of the secondary relay B20. The circuit will then function as before, registering a single count for the one closure of the treadle switch.

Means is further provided in the circuit to permit the counting operations of the remaining treadles should one or more of the treadles be shorted in any manner for any considerable length of time, as for example, if a vehicle stops with a wheel on the treadle.

To this end, there are provided the switch arms A1, B1, C1, associated with the operating relays A3, B3 and C3. Said switch arms are nor,- mally in open position and are adapted to be moved into engagement with fixed contacts A8. B8 and C8, respectively, upon energizing the said relays. Switch arm A1 is connected by wires A42 and A43 to switch arm A16, and by wires A42 and 48 to the iixed contact 33. The fixedv contact A8 is connected by wire A41 to xed contact A18. Switch arms B1 and C1 are connected by wires B42 and C42 to the fixed contacts B18 and C18. Fixed contacts B8 and C8 are con nected by wires B41 and 80; and C41 and 5i to fixed contacts A23 and B23, respectively, and by wires B41 and`B43; and C41 and C43 to switch arms B16 and C18, respectively.

Should treadle D be shorted in lany manner, the operation of the circuit would be the same as hereinabove described. The shorting of treadle D will energize the operating relay D3 thereby energizing the primary relay D10. The secondary relay D20 would in no way be energized as the energization of the operating relay will open switch D9-D19 thereby opening the continuation of the negative chain. As all the other secondary relays are connected into the negative chain ahead of secondary relay D20, the said relays will be energized in the manner hereinbefore described.

Should treadle B be shorted in any manner, operating relay B3 will become energized, thereby closing switches B1B8 and B5B8 and opening switch B9-B18. Closing switch B5--B8 will energize the primary relay B10, opening switch B16, B18. The secondary relay B20 cannot become energized until switch Bil-B19 again closes, so that coil B21 of said relay may be connected into the negative chain.

If treadle C were to be actuated during the shorted condition of treadle B, the actuatior` of treadle C will be registered on the counter. When the primary relay C10 becomes energized, switch 'CMA-CH' cios-2s, and when relay C3 becomes deenergized switch C9-C19 closes, thereby connecting lthe coil C21 of the secondary relay C20 into the negative chain.

However, due to the shorting of treadle B, the primary relay B10 is energized and holds switch B18-B18 open thereby breaking the negative chain at that point. The negative chain instead oi' passing through the switch B16- B18 follows the shunt circuit around this break in the chain through wire B42, switch B1-B8, wire B41 to wire of the negative chain. The secondary relay C20 may then become energized and actuate the counter E as hereinbefore described.

If treadle A were to be actuated while treadle B is shorted, the secondary relay A20 will be energized in the identical manner as heretofore described. The shorting of treadle B does not af.

fest secondary relay A20 as it is connected into the negative chain ahead of the break in said chain at open switch B18-C18. chain is not broken because secondary relay B20 remains de-energized,

By preventing the secondary relays from becoming energized until the release of the treadle switch, the positive chain is kept intact; and by The positive the addition of the shunt circuits acrossI the switches opened by the energization of the primary relays, the negative chain is kept intact, thus providing the means for energizing a secondary relay upon actuation of its treadle even though other treadles may be shorted in any manner and for any considerable iength oi' time.

The circuit of Fig. 2 schematically illustrates Y a counting system for registering on the totalizing counter the passage of every other vehicle axle in a lane. There is provided a four station totalizing counting circuit similar to that disclosed in Fig. 1.

Associated with each treadle A, B, C, and D, are two operating relays A10, A12; B10, B12, C10, C12; and D10, D12, respectively. The operating relays A10 and A12 have actuating coils A11 and A13, respectively, connected in series; operating relays B10 and B12 have actuating coils B11 and B13, respectively, connected in series; operating relays C10 'and C12 have actuating coils C11 and C13, respectively, connected in series; and operating relays D10 and D12 have actuating coils D11 and D13, respectively, connected in series. The primary relays A10, B10, C10 and D10 have two actuating coils A14, A15; B14, B15; C14, C15; and D14, D15, respectively.

Associated with the operating relays A10, B10, C10 and D10, are the switches A1-A8, A8,-A18; B1-B8, B11-B18; C1-C8, C8-C19; and D8- DIS, respectively, and their connections into the circuit as heretofore described. Associated with the said operating relays are the switch arms A18, B16, C16 and D10, respectively. Switch arms A16, B18, C16 and D18 are normally in engagement with xed contacts A11, B11, C11 and D11,

respectively, and are adapted to be moved out of engagement therewith and into engagement with fixed contacts A18, B18, C18 and D18, respectively, upon energizing said relays.

Associated with the operating relays A12, B12, C12 and D12, are the switch arms A19, B18, C18 and D19, respectively, said switch arms being normally in open position and adapted to be moved into engagement with xed contacts A80, B80, C83 and D80, respectively, upon energizing their respective operating relays.

Associated with the primary relays A10, B10, C10 and D10, are the switches A12-A13, A14- A15, A18-A11, A13; B12-B13, B14-B15, B16- B51, B18; C12-C13, C14-C15, C16-11, C18; and DIL-D13, D14-D15, DIE-D11, D18; respectively, and their connections into the circuit, as heretofore described. Associated with the said primary relays are make-before-break switches comprising switch arms A81, B81, C81 and D81, spring contacts A82, B82, C82, and D82, and fixed contacts A83, B83, C83 and D83, respectively. Said switch arms normally engage spring contacts A82, B82, C82 and D82, respectively, and are adapted to be moved into open position upon energizing said primary relays. Fixed contacts A83, B83, C83 and D83 are adapted to be engaged by their respective spring contacts upon movement of the respective switch arms and before said switch arms break contact with their respective spring contacts.

Treadlev contacts A2, B2, C2 and D2 are connected by wires A84, B84, C84 and D84 to the iixed contacts A83, B83, C83 and D83, respectively. Switch arms A16, B18, C18 and D16 are connected to the wires A84, B84, C84 and-D84 by wires A85, B85, C85 and D85, respectively. The fixed contacts A18, B18, C18 and D18 are connected by wires A86, B86, C88 and D86 to B11, B13; C11, C13 and D11, D13, respectively. 5

' The fixed contacts A80, B80, C80 and D80 are connected' to coils A11, B11, C11 and D11, respectively. The ends of coils A13, B13, C18 and D13 are connected to plus power supply. Switch arms A19, B10, C19, and D18 are connectedrby l0 wires A88, B88, C88 and D08 to the spring contacts A82, B82, C82 and D82, respectively. Fixed contacts A18, B15, C15 and D10 are connected to one end of the coils A14, B14, C14 and D18, re-

spectively, while the other ends of said coils are l connected to plus power supply. The coilsfA18, B15, C18 and D18 are connected to plus power supply. The switch arms A81, B81, C81 and D81 are connected by wires A90, B80, C90 and D80 to the switch arms A14, B141, C and D14. re- 20 spectively.

` When a wehicle traverses a treadle, such as A, and the front wheels of the vehicle close said switch, the operating relay A12 is energized, the

circuit being from minus power supplythrough treadle switch A, wires A84 and A88, switch A16-A11, wire A81, and coil A13 to plus power supply. Energizing relay A12 will close switch A A19-A80. Coil A11 of the other operating relay is now connected into the circuit by the closure of said switch. However, operating relay A10- canot become energized as its coil is connected at one end to minus power supply through the switchesy A19-A80, ABI-A82, wires A90 and A and switch A26-A21, and at its other end 35 to the minus power supply through the treadle\ switch A. As the front wheels release treadle A, relay A10 thereupon becomes'energized in series with relay A12, the circuit being minus power and A18 and A80, thecoils A11 and'A13 to plus power supply. Energizing relay A10 will open switches A18-A11 and Ail-A19 and close switches A18-A18 and A1-A8.

When the rear wheels of a vehicle pass over 45 and close treadle A for the second time, primary relay A10 will become energized, the circuit being from minus power supply through switch Al--A2, wires A84 and A85, switch A18-A18, wire A08,

coil A15 to plus power supply. Energizing the 50 primary relay A10 will close switch A14-A15 completing a holding circuit for coil A14 through the said switch and switch A26-A21, and open switch AS1-A82. In opening switch ABI-A82 contact is made by the spring contact A82 and 55 iixed contact A83, thus completing a circuit to hold the operating relays A10 and A12 energized through the treadle switch A,

Upon release of the treadle switch A, the operating relays A10 and A12 become de-energiz'ed 60 allowing the counting circuit to operate in a manner identical to that heretofore described in connection with Fig. 1. The -secondary relay A20 then becomes energized, de-energizing the primary relay A10, thereby actuating the counter E. Thus, only one count is registered for the passage of two vehicle axles over the treadle A. The counter E will be similarly operated upon every other actuation of treadles B, C, and D.

It will be noted that the lcircuit disclosed in Fig.l 2 has the identical positive and negative chains as disclosed in Fig. 1. Switches A1-A8, B1-B8, and' C1--C8, and their respective cony nections are also provided for the purpose of al- B12 will be energized alone.

other than the one having its respective treadle switch snorted. Similarly, the switches A9AI8, B9-B19, C11-C18 and D8-D19 are also provided in association with the operating relays A10, B10, C10 and D10, respectively, to prevent the energization of the secondary relays should their respective treadle switches be shorted.

It will be further noted that should a treadle switch, such as B, be shorted, or closed for along period, as and for a iirst closure, operating relay Operating relay B10 or the primary relay B10 will not be aiected by such a closure. It'` will only be upon the subsequent opening of treadle switch B that these relays will be energized as hereinbefore described.

'and D20.

In tramo counting installations where it is necessary to independently totalize vehicles travcling in opposite directions, an alternative embodiment of this invention provides two counters,

and permits the directional totalization of vehicles traveling over the highway. Fig. 3 represents a totalizing counting circuit adapted for use on a three-lane highway in which one outside lane has tramo moving in one direction, the other outside lane has trafiic moving in the opposite direction, while the center lane may have trailic moving in either direction.

Accordingly a treadle F is embedded in an outside lane to be actuated by vehicles passing in that lane in one direction, and a. treadle G embedded in the other outside lane to be actuated byrvehicles passing in that lane in the opposite direction. In the center lane, two treadles are embedded, M and N, and so disposed in said lane that the wheels of an axle moving in that lane will rst close one and then the other, meanwhile holding the first treadle closed, and then release the ilrst closed treadle switch and then the second.

Associated with treadle switch F are the operating relay F3, the primary relay F10 and the secondary relay F20.4 Associated with treadle switch M are the operating relay M3, primary4 relay M10 and secondary relay M20. The counting circuit 4for the treadles F and M includes glounter E for totalizing the count in one direc- Associated with treadle G are the operating relay G3, the primary relay G10 and the secondary relay G20, while treadle N has associated therewith the operating relay N3, the primary relay N10 and the secondary relay N20. The counting circuit for G and N includes counter RE for totalizing the count in the opposite direction. The two totalizing circuits are similar in construction and identical in function and mode of operation to the four station totalizing circuit disclosed in Fig. 1.

Associated with treadle switch M are three relays M8, M25 and M88 having actuating coils lowing the energization of the secondary relays M9, M28-M21',' and M29, respectively, Treadle switch N has associated therewith three similar vrelays N8, N25', and N28, having actuating coils mally held open but upon energization of said relay will engage iixed contact NI 2. Switch arms NI3 and N|5 are normally in engagement with ilxed contacts N|4 and NIS, respectively, and are adapted to be moved into open position upon energiza-tion of said relay.

Associated with the relay M25 are three switch arms MI1, MIS, and M23. Switch arms M|1 and MI! are normally open and are adapted to engage xed contacts M|8 and M2I, respectively, upon energization of said relay. Switch arm M23 normally engages xed contact M24 and is adapted to ibe moved into open position upon energization of said relay.

Associated with the relay M25 are three switch arms NI1, N|9 and N23. Switch arms N|1 and NI3 are normally open, and are adapted to engage xed contacts N|8 and N2i, respectively, upon energization of said relay. Switch arm N23 normally engages fixed contact N24 and is adapted to be moved into open position upon energization of said'relay.

Associated with the relay M28 are two switch arms M3| and M33. Switch arm M3I normally engages iixed contact M32 and is adapted to be moved into open position upon energization of said relay. Switch arm M33 is normally open and is adapted to engage xed contact M34 upon energization of said relay.

Associated with the relay N28 are two switch` arms N3| and N33. Switch arm N3I normally engages fixed contact N32 and is adapted to be moved into open position upon energization of said relay. Switch arm N33 is normally open i and is adapted to engage iixed contact N34 upon energization of said relay.

Treadle contacts MI and NI are connected to minus power supply. Treadle Contact M2 is 'connected by wire IIS to switch arm N23 and by wires ||9 and |20 to `one end of coil M9 of relay M8. The other end of coil M8 is connected to plus power supply. Treadle contact N2 is connected yby wire to switch arm M23 and by wires ||5 and ||6 to one end of coil N9 of relay is connected to plus power supply and the other end by wire ||4 to switch arm MIS. Switch arm M|1 is connected by wire |I3 to one end of coil M28, the other end of said coil being connected to plus power supply.

Coil N28 is connected at one end to plus power supply and at the other end by wire III to ilxed contact M24. Coil M21 is connected at one end to plus power supply and at its other end by wire ||8 to switch armNIS.

The fixed contacts M32, M34, N32 and N34 are connected to minus power supply. Switch arm M33 is connected by wire |23 to the coil of operating relay M3 and switch arm N33 is connected by wire |24 to the coil of operating relay Switch arm NI3 is connected to minus power supply. Switch arm NI1 is connected by wire I I1 to one end of coil N23, the other end of said coil being connected to plus power supply.

'I'he operation of the circuit interconnecting the treadles M and N will now be described when a vehicle axle passes over the treadles in the center lane closing treadle M iirst, and then treadle N.

Upon closing treadle switch M, relay M8 will be energized, the circuit being minus power supply through treadle switch M, wires ||9 and |20, coil M8 to plus power supply. Relay M25 is also energized by the closure of said switch, the energizing circuit being from minus power supply, wire |l9, switch N23-N24, wire II2, coil M26 to plus power supply.

As the vehicle wheels progress along the center lane, treadle switch N is also closed energizing relay N8, the circuit being from minus power supply through treadle switch N, wires I|5 and IIB, coil N9, to plus power supply. The closing of treadle switch N also completes a circuit through coil M21 of relay M25, the circuit being from plus power supply, coil M21, wire ||4, switch Ml9-M2I, wires |09 and |02, switch Nil-N12, wires los and |05, switch Mal-'M32 to minus power supply.

As the vehicle continues, treadle switch M is released thereby breaking the circuit for coil M3 and releasing relay M8. The circuit for coll M26 of relay M25 is also opened by release of said treadle switch, but relay M25 is held energized by the influence of coil M21. As relay M8 becomes de-energized, switch MI5-MIB closes and completes a holding circuit for coil M21, the circuit being from plus power supply, coil M21, wire N8. The other end of said coil is connected to plusl power supply.

The switch arm MII is connected by wires |03 and |01 to switch arms N|5 and N3I. Switch arm M|3 is connected by wires |04 and |08 to the iixed contacts MIB and NI8. Switch arm MI5 is connected by wire |05 to switch arm M3! and by wires |05 and |06 to switch arm NII. Fixed contact M|2 is connected by wire |00 to fixed contact NIS and by wires |00 and III to fixed contact N2I. Fixed contact M|4 is connected by wire |0| to fixed contact NI4. Fixed contact MIS is connected by wire |02 to xed contact N|2 and by wires |02 and |09 to fixed contact M2 One end of coil M28 is connected to plus power supply and the other end is connected by wire II2 to iixed contact N24. One end of coil M21 ||4, switch M|9-M2|, wires |09 and |02, switch MI5-MIG, wire |05, switch M33-M34 to minus power supply.

As the wheels of a vehicle roll off treadle N, relay N8 becomes de-energized. Relay M25 remains energized due to the above-mentioned holding circuit. The release of relay N8 completes a circuit through coil M29 of relay M28, the circuit being from plus power supply, through the coil M29, Wire ||3, switch Mi1-Ml8, wires |08 and |04, switch MI3-MI4, wire Ilil, switch N|3-N|4, to minus power supply. Energizing relay M28 will-close switch M33-M34 to energize the operating relay M3, the circuit being from' minus power supply through said switch and wire |23 to the coil of the operating relay. Switch M3 |-M32 opens de-energizing relay M25, in turn de-energizing the relay M28. y

By closing switch M33-M34 and energizing the operating relay M3, the counting circuit will be operated to actuate the counter E in the manner heretofore described.

In a similar manner counter RE will be actuated when a vehicle passes over the center lanc in the `opposite direction closing the treadle switch N and then treadle switch M. Switch N33-N34 will close energizing the operating relay N3, thereby operating the counting circuit to actuate the counter RE.

It will be seen, therefore, that all vehicle axles moving in one direction, whether moving on a uni-directional lane, or on the two-directional lane, will register the passage of said axles on the totalizing counter E; and that all vehicle axles moving in the opposite direction, whether moving on the other uni-directional lane or on the twodirectional lane, will register the passage of said axles on the totalizing counter RE.

It will also be understood that the directional totalizing circuit illustrated in Fig. 3, and herein described, can be expanded to include a combination of any number of uni-directional lanes carrying traflic in one direction, any number of uni-directional lanes carrying traino in the opposite direction, and any number of two-directional lanes. For a plurality of two-directional lanes, the circuit interconnecting the treadle switches M and N is multiplied for each additional lane and switch MSS-M34 is connected to an added station in the counting circuit of counter E and switch N33-N34 is connected to an added station in the counting' circuit of counter RE.

It Will furthermore be noted that the directional'counting circuit illustrated in Fig. 3 may be used to count every other vehicle axle instead of every axle. In such case, the additions made to the circuit of Fig. 1 and illustrated by Fig. 2, are made in the circuit as disclosed. The first closure of switch M33-1V1'34 or NSS-N313 would energize the first of the operating relays, and the subsequent opening of said switch energizing the other operating relay. The second closure of switch M33-M3li or N33-N3 energizes the primary relay thereby operating the respective counting circuits.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiments above set forth, it is to be understood that all matter herein described, or 'shown ln the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In combination, a plurality of switches, anV

electromagnetic counter having an electromagnet, means to energize the electromagnet once for each actuation of any of said switches when the period between actuations of different switches is either greater or less than the time it takes for the counter to operate in making a count, and including means to prevent more than one energization of said electromagnet upon actuation of a switch, irrespective of the durationof actuation of that switch.

2. In apparatus for checking the trac on a highway having more than two lanes, a treadle for each lane of the highway, adapted to be actuated by vehicles passing along said lane, a counting means including an electromagnet, means to energize said electromagnet upon actuation of any of said treadles, when said treadles are actuated either alone or substantially simultaneously and to prevent making a count on said counting means upon actuation of any treadle if said treadle is not restored to initial condition, and including means to prevent more than one count on said counting means upon actuation of a treadle irrespective of the duration of actuation thereof.

3. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, and a circuit connecting said switches and said electromagnet, said circuit means to energize said electromagnet upon actuation of any of said switches, when said switches are actuated either alone or substantially simultaneously and including means to prevent more than one energization of said electromagnet by the actuation of said switches irrespective of the duration of actuation of said switches.

4. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, and a circuit connecting said switches and said electromagnet, said circuit comprising means to energize said electromagnet upon actuation of any of said switches, when said switches are actuated either alone or substantially simultaneously and including means to prevent more than one energization of said electromagnet by the actuation of said switches irrespective of the duration of actuation of said switches, and including means to energize said electromagnet each time a switch is actuated while another switch remains in actuated condition.

5. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, and a circuit connecting said switches and said electromagnet, said circuit comprising means to energize said electromagnet upon actuation of any of said switches, when said switches are actuated either alone or substantially simultaneously and including means to prevent more than one energization of said electromagnet by the actuation of said switches irrespective of the duration of actuation of said switches, and including means to energize said electromagnet each time a switch is actuated while one or more of the other switches remain in actuated condition.

6. In combination, a plurality of switches, an electromagnetic counter, a circuit interconnecting said switches and said counter, including a primary and a secondary relay for each switch, means for energizing each primary relay upon actuating its switch, means to hold said primary relays energized upon release of their switches, means to energize said secondary relays upon energizing the primary relays associated therewith and release of their respective switches, means to release the primary relays upon energizing their secondary relays, and means to actuate said electromagnetic counter upon release of an energized primary relay.

'7. In combination, a plurality of switches, an electromagnetic counter, a circuit interconnecting said switches and said counter, including a primary and a secondary relay for each switch, means for energizing each primary relay upon actuating its switch, means to hold said primary relays energized upon release of their switches, means to energize said secondary relays upon energizing the primary relays associated therewith and release of their respective switches, means to release the primary relays upon enercomprising' gizing their secondary relays, means to actuate said electromagnetic counter upon release of an energized primary relay, and means controlled by said primary and secondary relays to prevent more than one secondary relay i'rom being actuated should more than one switch be actuated substantially simultaneously, until the secondary relay which has been energized releases its primary relay resulting in actuation oi' the counter, thereby permitting another secondary relay to be energized to release its primary relay for causing another actuation o! said counter.

8. In combination, a plurality ot switches, an electromagnetic counter, a circuit interconnecting said switches and said counter, including a primary and a secondary relay for each switch. means for energizing each primary relay upon actuating its switch, means to hold said primary relays energized upon release ci their switches, means to energize said secondary relays upon energizing the primary relays associated therewith and release oi' their respective 'switchesl means to release the primary relays upon encrgizing their secondary relays, means to actuate said electromagnetic counter upon release of a primary' relay, and means controlled by said primary and secondary relays to prevent more than one secondary relay from being actuated should more than one switch be actuated substantially simultaneously, until the secondary relay which has been energized releases its primary relay resulting in actuation of the counter, thereby permitting another secondary relay to be energized to release its primary relay for causing another actuation of said counter, and means for releasing the primary relays upon energizing the secondary relays including means to prevent release of the primary relays unless the switches associated with said primary relays have been previously released.

9. In combination, a plurality of switches, an electromagnetic counter, a circuit interconnecting said switches and said counter, including a primary and a secondary relay for each switch, means for energizing each primary relay upon actuating its switch, means to hold said primary relays energized upon release of their switches, means to energize said secondary relays upon energizing the primary relays associated therewith and -release oi their respective switches, means to release the primary relays upon energizing their secondary relays, means to actuate said electromagnetic counter upon release of a primary relay, means controlled by said primary and secondary relays to prevent more than one secondary relay from being actuated should more than one switch be actuated substantially simultaneously, until the secondary relay which has been energized releases its primary relay resulting in actuation of the counter, thereby permitting another secondary relay to be energized to release its primary relay for causing another actuation of said counter, the means for releasing the primary relays upon energizing the secondary relays including means to prevent release oi' the primary relays unless the switches associated with said primary relays have been previously released, and including means to prevent more than one count on said counter upon actuation of a switch irrespective of the duration of actuation of said switch.

10. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, a circuit interconnecting said switches and said electromagnet, including an operating reto energize the primary relays upon energization of their respective operating relays, means to hold said primary relays energized upon de-energization of their respective operating relays, means to energize said secondary relays upon deenergizing the operating relays associated therewith, means to release the primary relays upon energizing their respective secondary relays, and means to energize said electromagnet upon release of a primary relay.

. l1. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, a circuit interconnecting said switches and said electromagnet, including an operating relay,

a primary relay, and a secondary relay for each' oi said switches, means for energizing each operating relay upon actuating its switch, means to energize the primary relays upon energization of their respective operating relays, means to hold said primary relays energized upon deenergization of their respective operating relays, means to energize said secondary relays upon deenergizing the operating relays associated therewith, means to release the primary relays upon energizing their respective secondary relays, means to energize said electromagnet upon release of a primary relay, and means controlled by said primary and secondary relays to prevent more than one secondary relay from being energized should more than one switch be actuated substantially simuitaneously until the secondary relay which has been energized opens its primary relay, resulting in the energization oi' the electromagnet, thereby permitting another secondary relay to be energized to open its .primary relay for causing another energization of said electromagnet.

12. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, a circuit interconnecting said switches and said electromagnet, including an operating relay, a primary relay, and a secondary relay for each of said switches, means for energizing each operating relay upon actuating its switch, means to energize the primary relays upon energization of their respective operating relays,

means. to hold said primary relays energized upon de-energization oi' their respective operating relays, means to energize said secondary relays upon deenergizing the operating relays associated therewith, means to release the primary relays upon energizing their respective secondary relays, and means to energize said electromagnet upon release of a primary relay, the means i'or releasing the primary relays upon energizing their respective secondary relays including means to prevent release of the primary relay unless the operating relays associated with said primary relays have been previously deenergized.

l3. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, a. circuit interconnecting said switches and said electromagnet, including an operating relay, a primary relay, and a secondary relay for each of said switches, means for energizing each operating relay upon actuating its switch, means to energize the primary relays upon energization of their respective operating relays, means to hold said primary relays energized upon deenergization of their respective operating relays, means to energize said secondary relays upon deenergizing the operating relays associated therewith, means to release the primary relays upon energizing their respective secondary relays, means to energize said electromagnet upon release oi a primary relay, and said circuit including means to prevent more than one energization of said electromagnet by actuation ot said switches, irrespective of the duration of ac tuation of said switches.

i4. In combination, a plurality of, an electromagnetic counter having an electromagnet, a circuit interconnecting said switches and said electromagnet. including an operating relay, a primary relay, and a secondary relay for each oi said switches. means for energizing each operating relay upon actuating the switch, means to energize the primary relays upon en-f ergization of their respective operating relays, means to hold said primary relays energized upon dce-energization of their respective operating relays, means to energize said secondary relays upon deenergizing the operating relays associated therewith, means to release the primary relays 'upon energizing their respective secondary re lays, means to energize said electromagnet upon release of a primary relay, said circuit including means to prevent more than one energization of said electromagnet by actuation o'f said switches, irrespective of the duration of actuation of said switches, and including means to energize said electromagnet when one or more of said switches are actuated while another switch remains in actuated condition.

ergization of their respective operating relays, means to energize said secondary relays upon deenergizing the operating relays associated therewith, means to release the primary relays upon energizing their respective secondary relays,and means to energize said electromagnet upon release of a primary relay, means controlled by said primary and secondary relays to prevent more than one secondary relay from being energized should more than one switch be actuated substantially simultaneously until the secondary relay which has been energized opens its primary relay, resulting in the energization of the electromagnet, thereby permitting another secondary relay to be energized to open its primary relay for causing another energization of said electromagnet, the means for releasing the primary relays upon energizing their respective secondary relays including means to prevent release of the primary relays unless the operating relays associated with said primary relays have been previously de-energized, and said circuit including means to prevent more than one energization of 15. In combination, a plurality oi. switches, an

electromagnetic counter having an electromagnet, a circuit interconnecting said switchesand said electromagnet, including an operating relay, a primary relay, and a secondary relay for each of said switches, means for energizing each operatingl relay upon actuating its switch, means to energize the primary relays upon energization of their respective operating relays, means to hold said primary relays energized upon deenergization of their respective operating relays, means to energize said secondary relays upon deenergizing the operating relays asso ciated therewith, means to release the primary relays upon energizing their respective secondary relays, means to energize said electromagnet upon release of a primary relay, and means controlled by said primary and secondary relays to prevent more than one secondary relay from being energized should more than one switch be actuated substantially simultaneously until the secondary relay which has been energized opens its primary relay, resulting in the energization of the electromagnet, thereby permitting another secondary relay to be energizedto open its primary relay for causing another energization of said electromagnet, the means for releasing the primary relays upon energizing their respective seci,

ondary relays including means to prevent release of the primary relays unless the operating relays associated with said primary relays have been previously de-energized.

16. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, a circuit interconnecting said switches and said electromagnet, including an operating relay, a primary relay, and a secondary relay for each of said switches, means for energizing each operating relay upon actuating its switch, means to energize the primary relays upon energization of their respective operating relays, means to hold said primary relays energized upon de-ensaid electromagnet by actuation of said switches. irrespective of the duration of actuation of said switches.

17. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, acircuit interconnecting said switches and said electromagnet, including an operating relay, a primary relay, and a secondary relay for each of said switches, means for energizing each operating relay upon actuating its switch, means to energize the primary relays upon energization of their respective operating relays, means to hold said primary relays energized upon de-energization of their respective operating relays, means to energize said secondary relays upon deenergizing the operating relays associated therewith, means to release the primary relays upon energizing their respective secondary relays, means to energize said electromagnet upon release of a primary relay, means controlled by said primary and secondary relays to prevent more than one secondary relay from being energized should more than one switch be actuated substantially simultaneously until the secondary relay which has been energized opens its primary relay, resulting in the energization of the electromagnet. therebypermitting another secondary relay to be energized to open its'primary relay for causing another energization of said electromagnet, the means for releasing the primary relays upon energizing their respective secondary relays including means to prevent release of the primary relays unless the operating relays kassociated with said primary relays have been previously de-energized, means to prevent more than one energization of said electromagnet by actuation oi said switches, irrespective of the duration oi actuation of said switches, and said circuit including means to energize said electromagnet when one or more of said switches are actuatedv while another switch remains in actuated condition.

1S. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, and a circuit connecting said switches and said electromagnet, said circuit comprising means to energize said electromagnet once upon actuation ofvany of said switches a predetermined plurality of times, when said switches are actuated either alone or -substantially simultaneously, and including means to prevent more than one energization of said electromagnet by actuaenergization of said electromagnet by actuation of one of said switches said predetermined plurality of times irrespective of the duration oi actuations of said switch, and including means to energize said electromagnet once when any of said switches are actuated said plurality of times while another switch remains in actuated condition.

20. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, and a circuit connecting said switches and said electromagnet, said circuit comprising means to energize said electromagnet once upon actuation of any of said switches a predetermined plurality of times, when said switches are actuated either alone or substantially simulta neously, and including mean tol prevent more than one energization of said electromagnet by actuation of one of said switches said predetermined plurality of times irrespective of the duration of actuations of said switch, including means to energize said electromagnet once when any oi' vsaid switches are actuated said plurality of times while another switch remains in actuated condition, and including means to energize said electromagnet once when any of said switches are actuated said plurality of times while one or more of the other switches remain in actuated condition.

21. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, and a circuit interconnecting said switches and said electromagnet, including a pair of operating relays for each switch, whose coils are connected in series; a primary and a secondary relay for each of said switches, means for energizing one ofsaid pair of operating relays upon actuating its switch, means Ior energizing the other of said pair of operating relays upon the subsequent opening of its switch, means to energize the primary relays upon the subsequent closure of its switch, means to hold said primary relays energized upon de-energization of their respective pair of operating relays, means to energize said secondary relays upon deenergizing the operating relays associated therewith, means to release the primary relays upon energizing their respective secondary relays, and means to energize said electromagnet upon release of a primary' relay.

22. In combination, a plurality of switches, an

relays energized upon de-energization of their respective pair of operating relays, means to energize said secondary relays upon deenergizing'the operating relays associated therewith, means to release the primary relays upon energizing their respective secondary relays, means to energize said electromagnet upon release of a primary relay, and means controlled by said primary and secondary relays to prevent more than one secondary relay from being energized should more than one switch be actuated substantially simultaneously until the secondary relay which has been energized opens its primary relay, resulting in the energization of the electromagnet, thereby permitting another secondary relay to be energized to open its primary relay for causing another energization of said electromagnet.

23. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, and a circuit interconnecting said switches and said electromagnet, including a pair of operating relays for each switch, whose coils are connected in series;l a primary and a secondary relay for each of said switches, means for energizing one of said pair of operating relays upon actuating its switch, means for energizing the other of said pair of operating relays upon the subsequent opening of its switch, means to energize the primary relays upon the subsequent closure of its switch, means to hold said primary relays energized upon de-energization of their respective pair of operating relays, means to energize said secondary relays upon deenergizing the operating relays associated therewith, means to release the primary relays upon energizing their respective secondary relays, means to energize the electromagnet upon release of a primary relay, and means controlled by said primary and secondary relays to prevent more than one secondary relay from being energized should more than one switch be actuated substantially simultaneously until the secondary relay which has been energized opens its primary relay, resulting in the energization of the electromagnet, thereby permitting another secondary relay to be energized to open its primary relay for causing another energization of said electromagnet, the means for releasing the primary relays upon energizing their respective secondary relays being operative only if the operating relays associated with said primary relays have been previously de-energized.

24. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, and a circuit interconnecting said switches and said electromagnet, including a pair of operating relays for each switch, whose coils are connected in series; a primary and a secondary relay for each of said switches, means for energizing one of said pair of operating relays upon actuating its switch, means for energizing the other of said pair of operating relays upon the subsequent opening of its switch, means to energize the primary relays upon the subsequent closure of its switch, means to hold said primary relays energized upon de-energization of their respective pair of operating relays, means to energize said secondary relays upon deenergizing the operating relays associated therewith, means to release the primary relays upon energizing their respective secondary relays, means to energize the electromagnet upon release of a primary relay, and means controlled by said primary and secondary relays to prevent more than one secondary relay from being energized should more than one switch be actuatedy substantially simultaneously until the secondary relay which has been energized opens its primary relay, resulting in the energization of the electromagnet, thereby permitting another secondary relay to be energized to open its primary relay for causing another energization of said electromagnet, the means for releasing the primary relays upon energizing their Yrespective secondary relays being operative only ii the operating relays associated with said primary relays have been previously de-energized, and said circuit including means toprevent more than one energization of said electromagnet by actuation of said switches, irrespective of the duration-of actuation of said switches.

25. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, and a circuit interconnecting said switches and said electromagnet, including a pair of operating relays for each switch, whose coils are connected in series; a primary and a secondary relay for each of said switches, means for energizing one of said pair of operating relays upon actuating its switch, means for energizing the other of said pair of operating relays upon the subsequent opening oi its switch, means to energize the primary relays upon the subsequent closure of its switch, means to hold said primary relays energized upon de-energization of their respective pair of operating relays, means to energize said secondary relays upon deenerthe primary relays upon energizing their respective secondary relays, means to energize the gizing the operating relays associated therewith, y

means to release the primary relays upon energizing their respective secondary relays, means to energize the electromagnet upon release of a primary relay, means controlled by said primary and secondary relays to prevent more than one secondary relay from being energized should more than onevswitch be actuated substantially simultaneously until the secondary relay which has been energized opens its primary relay, resulting in the energization of the electromagnet, thereby permitting another secondary relay to be energized to open its primary relay for causing another energization of said electromagnet, the means for releasing the primary relays upon energizing their respective secondary relays being operative only if the operating relays associated with said primary relays have been previously de-energized,V said circuit including means to prevent more than one energization of said electromagnet by actuation of said switches, irrespective of the duration of actuation of said switches, and including means to energize said electromagnet when one or more of said switches are actuated while another switch remains in actuated condition.

26. In combination, a plurality of switches, an electromagnetic counter having an electromagnet, and a circuit interconnecting said switches and said electromagnet, including a pair of operating relays for each switch, whose coils are connected in series; a primary and a se-condary relay ior each of said switches, means for energizingone of said pair of operating relays upon actuating its switch, means for energizing the other of said pair of operating relays upon the subsequent opening of its switch, means to energize the primary relays upon the subsequent closure of its switch, means to hold said primary relays energized upon de-energization of their respective pair of operating relays, means to energize said secondary relays upon deenergizing the operating relays associated therewith, means to release leasingthe primary relays upbn energizing their respective secondary relays being operative only if the operating relays associated with said primary relays have been previously de-energized,y

and said circuit including means to prevent more than one energization of said eiectromagnet by actuation of said switches, irrespective of the duration of actuation of said switches, and including means controled by the second of said operating relays of each pair of said relays, vto permit the energization of the secondary relays associated with the remaining switches, while one or more other switches remain actuated.

2'7. In a trailic counting system, two single switch treadles and a multi-switch treadle. each adapted to be disposed in separate lanes of a highway and actuated by the wheels of vehicles as they roll over said treadles, a pair of counters, each of said counters having an electromagnet, means to energize the first of said electromagnets for all actuations of the rst single switch treadle and multi-switch treadle actuated by vehicles going in one direction, and means to energize the other of said electromagnets for all actuations of the other single switch treadle and the multiswitch treadle actuated by vehicles going in an opposite direction. l y

28. In a trafc counting system, two single switch treadles and av multi-switch treadle, each adapted to be disposed in separate lanes of a highway and actuated by the wheels of vehicles as they roll over said treadles, a pair of counters, each of said counters having an electromagnet, means to energize the first of said electromagnets for all actuations of the ilrst single switch treadle and multi-switch treadle actuated by vehicles going in one direction, and means to energize the other of said electromagnets for all actuations of the other single switch treadle and the multiswitch treadle actuated by vehicles going in an opposite direction, when said switches are actuated either alone or substantially simultaneously.

29. In a trafi'lc counting system, two single switch treadles and a multi-switch treadle, each adapted to be disposed in separate lanes of a highway and actuated by the wheels of vehicles as they roll over said treadles, a pair of counters, each of said counters having an electromagnet, means to energize the first of said electromagnets for all actuations of the first single switch treadle and multi-switch treadle actuated by vehicles go- 'ing in one direction, means to energize the other of said electromagnets for all actuations of the other single switch treadle and the multi-switch treadle actuated by vehicles going in an opposite direction, when said switches are actuated either alone or substantially simultaneously, and means included in said rst and second mentioned means to prevent energization of said electromagnets upon actuation of their respective single switch treadies irrespective of the duration oi actuation of said treadles.

30. In a traffic counting system, two single switch treadies and a multi-switch treadle, each adapted to be disposed in separate lanes of a highway and actuated by the wheels of vehicles as they roll over said treadles, a pair of counters, each of said counters having an electromagnet, means to energize the iirst of said ei'ectromagnets for ali actuations oi the first single switch treadle and multi-switch trcadle actuated by vehicles going in one direction, means to lenergize the other of said electromagnets for all actuations of the other single switch treadle and the multi-switch treadle actuated by vehicles going in an opposite direction, when said switches are actuated either respective single switch treadles are actuated when one or more of the remaining treadles interconnected therewith remain in actuated condition. v

A BENJAMIN COOPER.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2525824 *Sep 12, 1947Oct 17, 1950Eastern Ind IncTraffic counting apparatus
US2551977 *May 9, 1947May 8, 1951Ralph L ThompsonTreadle-controlled axle-counting circuit for toll-checking systems
US2603419 *Dec 8, 1949Jul 15, 1952Eastern Ind IncTreadle controlled counting system
US2784911 *Apr 27, 1950Mar 12, 1957Benjamin CooperTreadle controlled toll checking systems
US2807418 *Jul 10, 1952Sep 24, 1957IbmVehicle registering device
US3109926 *Jan 6, 1961Nov 5, 1963Gen Signal CorpToll estimation system
US5477217 *Feb 18, 1994Dec 19, 1995International Road DynamicsBidirectional road traffic sensor
US5621195 *Jun 7, 1995Apr 15, 1997International Road Dynamics Inc.System for mounting on a roadway
Classifications
U.S. Classification377/9, 235/99.00A
International ClassificationG08G1/02
Cooperative ClassificationG08G1/02
European ClassificationG08G1/02