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Publication numberUSRE14475 E
Publication typeGrant
Publication dateMay 21, 1918
Filing dateJul 20, 1917
Publication numberUS RE14475 E, US RE14475E, US-E-RE14475, USRE14475 E, USRE14475E
InventorsF. J. Troll
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Fmpbrick
US RE14475 E
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

F. J. TROLL.

LOAD INDICATOR FOR MOTOR TRUCKS.

APPLICATION FILED JULY 20. 1911.

Reissued May 21, 1918.

2 SHEETSSHEET 1.

F. J. TROLL.

LOAD INDICATOR FOR MOTOR TRUCKS.

APPLICATKON FILED JULY 20, I91?- Reissued May 21, 1918.

* UNITED STATES PATENT. OFFICE,

Wanton J. 0F BALTIMORE, MARYLAND, ASSIGNO'RITO THE onommna coilrm, or BALTIMORE, MARYLAND, A CORPORATION or DELAWARE.

LOAD-INDICATOR FOR MOTOR-TRUCKS.

Specification ofReissue d Letters Patent. Reigsued May 21, 1918,

Original No. 1,147,127, dated July 20, 1915, Serial No. 698,250, filed May 18, 1912. Application for rename filed July 20, 1917.

To all whom'z't may concern:

a citizen of the United States, residing at Baltimore, and State of Maryland, have invented certain new and useful Improve mentsinLoad-Indicators for Motor-Trucks, of which the following is a specification.

This invention relates to a combined load indicator and alarm for motor trucks, and may be termed a loadometer.

Motor trucks are sometimes equipped with a sign disposed at some convenient point on the vehicle to indicate the pound capacity thereof. Warnings are also located on thevehicle to the effect that it, should not be.

loaded to an extent beyond its rated carrying capaclty, say for instance, 6000 pounds. The reason for such notices and warnings is that overloads placethe truck under unnecessary strain and impair the life of the truck. A

to be on the safe side may underload the truck thereby reducing the operative efficiency by increasing the unit cost per pound of the materials handled. Careless drivers are likely to overload the truck thereby increasing the repair cost, tire expense, etc., with the result that from the manufacturers view point, the reputation of the truck is afi'ectedto the disadvanta e of the manufacturer by reason of comp aints from owners or purchasers of motor trucks.

It is therefore one object of my invention to provide an apparatus particularly adapted to be associated with a motor truck which will indicate the underload and overload'in units of one hundred pounds more or less so that the rated capacity of the truck will not be abused and so that the operating efficiency will not be reduced because of failure to load the truck to its rated capacity.

Another object resides in the provision of an electro-mechanical means which may be readily applied to any motor truck Without alterations to the latter and which will effectivel operate so :that the full load may always e carried and an overload or under-;

load always known to the driver or other attendant.

The invention also aims to combine with a vehicle, indicatingmeans disposed in the most advantageous position, both for observation and not" to be in the way, and indicator actuating means, the latter being Serial No. 181,913.

located with reference to the body, platform, or load-receiving member and the running gear, so as to be positively actuated by movements of the body, due to the amount of weight placed thereon, without requiring complex parts.

It is still further designed 'to provide means for application to a motor truck embodying among other characteristics an audible alarm which will sound in the event of" the truck reaching its rated capacity and continue to sound until the truck is relieved of its overweight so that the. driver will know that to preserve the life of the truck and to discontinue the alarm some of the materials must be removed from the truck in order to decrease the weight on same.

With the above and other objects in view the present invention consists in the combi-. nation and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings and particularly pointed out .in the appended claims, it being understood that changes may be made in the form, proportion, size and minor details,

without departing from the spirit or sacriindicating the application of the visible part of my invention thereto.

Fig. 3 is aface view of one of the electro mechanical resistance changing devices, with the closure of the casing removed. P

Fig. 4 is 'a sectional view thereof/ In one embodiment of my invention I employ a plurality of electro-mechanical resistance c anging devices preferably four in number, with these resistance changing devices located in close proximity to the ends of the front andrear axles of the vehicle 10. These resistance changing devices are located somewhat after the fashion of a shock absorber and each consists preferably of a casing A composed of two parts 11 and 12, the part 11 forming the body of the casing and having an arm 13 extending therefrom and provided at its outer end with an eye 14 through which may be passed a suitable fastening element 15, to secure the arm 13 to the corresponding elliptical spring 16 arranged adjacent each wheel 17 of the suitable elementv 22 whereby the outer end of the arm 20 may be connected to the framework or body 10 of the vehicle.

To secure the axis 19 of the arm'20 against displacement or accidental withdrawal from its bearing 18 there may be provided a collar 23 located within the casin and embracing the axis and through w ich collar are passed screws or other suitable elements 24 adapted to fit in a groove 25 in the axis 19 of the arm 20 whereby the axis has rotatable movement in the casing and yet is held Y against accidental withdrawal therefrom by vlrtue of the fastening elements 24 fitting in said groove 25,. The inner end of the axis 19 is preferably reduced and squared so as to support a gear 26 which is held on the inner end of the axis 19 by means of a collar 27 and set screw 28, respectively.

Mounted in the wall a of the casing A in any suitable manner is an arbor 29 which is preferably shouldered at 30 to support a pinion 31 adapted to mesh with the aforesaid gear 26. This pinion 31 has a sleeved portion 32- projecting therefrom and embracing Which is the collar 33 and an arm 34. The collar 33 may be heldfixedly to the sleeve 32 by means of one or more set screws 35 with the pinion 31 held against longitudinal movement on the arbor 29 by means of a collar 36 secured to the outer end of the arbor 29 by means of a set screw or other suitable fastening 37, The collar 36 and fastening 37 cotiperate with the fastenings 35 to maintain the arm 34 in its normal posi-.

tion with relation to the pinion 3 ity of spaced contacts 45. These contacts 45 i The arm 34 is preferably composed of two sections, with the inner section insulated fromthe outer section by means of suitable insulating material 69 and at the outer end 'of the arm there is formed a sleeve 38 in which is mounted a contact member 39 which is adjustably and yieldably mounted in the sleeve 38 by an adjusting screw 40 and'a spring 41, the latter fitting between the adjusting screw 40andthe contact member 39.

Disposed within the casing A and secured to the inner side of the wall a: by means of screws or other suitable fastenings 42 is a flanged annular insulating ring 43 provided with a, plurality of slots to receive a pluralare insulated from the casing and each other by the ring 43 and also insulated from each other by the parts of the ring formed bewhich causes swingin tween the slots in which the contact pieces are located. These contact pieces 45- are adapted for cooperation with. the aforesaid contact member 39 which latter issadapted to successively operate over the contacts 45 according to the weight on the vehicle and the consequent rotation of the gears 26 and pinions 31 under the influence of the arms 20 and 13 of the resistance changing devices movement of the arms 34 of the respective resistance changing devices to move the contact members 39 over the respective contacts 45. To prevent .the contact members39 from breaking the electrical circuit at any point in their rotation, the width of the insulating material between the slots providedto receive the contacts 45, must be made narrower than the contact members39.

Disposed within the casing and arranged circumferentially with respect to the annular insulating member'43 and exteriorly of the latter in spaced relation thereto is'a lurality of electrical resistances 46 w ose spools are secured to the inner side of the Walla: of the'casing A preferably by means of screws 47 These electrical resistances 46 are preferably connected in series to the contact members 45 as clearly shown in t Fig. 3.

To provide for an eflicient lubrication of the journal 19 of the arm 20 there is formed in the outer face of. the wall a of each casing A an annular groove 48 filled with a suitable packing in which lubricating oil may be injected through a passage 49 from which it may pass through the packing and duct 50 to the journal to lubricate the same.

The electro-mechanical resistance changing devices are electrically connected in series to a common source of electric supply. such for instanc as dry cells, or the atteries generally tilized for i ition or an electrical storage battery of e ectric trucks,

is preferably of the milliammeter type.

This indicator consistsof a stationary coil 55, a movable coil 56 connected in multiple with co-il 55, a rotating contact 57, which is electrically connected to the axis 58 of the instrument and located in an insulated col-' lar or ring 59. There is a pointer or index finger 60 carried by the axis 58 of the instrument which works over the dial 61 on which dial may be raduations and indications on opposite si es of the rated capacitv of say for instance six thousand pounds. The instrument also has a thin contact or brush 63 insulated from'same adapted to cooperate with the rotatable contact 57 at a predetermined time as will be hereinafter connected with the resistance chan 'ng circuit and which may be termed the a arm circuit for the purpose of sounding the alarm to audibly indicatethat the maximum ca pacity of the truck has been reached. The

alarm circuit is connected with the resist ance changing circuit and with the indicator the alarm being indicated at 64.

As it is essentia that a constant voltage be maintained in the resistance changing vehicle receiving the predetermined amount circuit which is supplied by the batteries or sonrce of supply 51, and whose voltage would be appreciably lowered if the current were taken from source 51 to operate the alarm 64; an extra source of current 52 is ther efore rovided.

The resistance circuit may be connected up with the respective resistance changing devices by the means of an entering wire 65 which may lead through an opening 66 in the corresponding casing'A and connect to one of the contact pieces 45. The current flows up through the contact member 39 and the arm 34 to the binding post 70 and out through the outgoingfiexible wire 68 which also passes through the aforesaid. opening 66 in the respective casing A. f

The operation of the apparatus may be stated as follows: When about to load the truck the switch 53 on the dash board is closed. As'the materials are placed on the truck the same is depressed and the springs 16 gradually flatten. "Under the flattening action of the spring 16, the outer ends of the arms 13 and 'are forced together or toward each other under the depression of the body of the vehicle., This causes the axis 19 of the arm 20 of the "electro-mechanical resistance devices torotate and with them the respective*gears 26 and pinions 31. The gears 26 being in mesh with the pinions 31 the latter are rotated and cause swinging of the arms 34 in the resistance changing devices. As the arms 34 rotate the corresponding contacts 39 carried thereby are carr1ed over the contacts 45. Bythe multiplying efiect of the gears 26 and the cooperating pinions 31 electrical resistance is cut out of the resistance changing device circuit according to the amount of depression of the vehicle body caused by the load. In other words, if the load be equally distributed throughout, the amount of resistance cut out in each resistance changing device is substantially the same. If a heavy machine or other heavy concentrated load, or if for any other reason any preponderance of load is placed at either the extreme front or back or side of the truck, causing two of the springs to be depressed more than the other'two and consequently but two of the resistance devices acted upon to any appreciable extent, causing resistance to be cut out of the resistance changing device circuit, the indicator E would reglster the load, because the proper amount of resistance, corresponding to the load, is out out of the resistance changing device circuit by virtue of the sum of the vertigal movements or depressions of the two springs being equal to the sufn of the vertical movements or depressions of all four of the springs, if the load had been so applied as to cause all four of the springs to be depressed, Upon the in weight of goods or, in other words, its maximum weight capacity, the stationary coil of the indicating instrument E will be sufliciently energized to move the movable coil 56 to which the index finger 60 is connected, thus causing the index finger 60 to pass over the dial 61 and indicate the load on thetruck. When the load has reached anywhere within, say for instance five hundred pounds of-the maximum weight capacity,'the, operator, may tell by the indicator that he is nearing the maximum rated capacity. In any event, as further load is placed on the truck more and more resistance is cut outof the. resistance changing device circuit and when a pointy is reached where the maximum-predetermined current is passing through the indicating instrument E, switch 53, and the resistance devices, it causes the. index finger 60 to reach the dotted line position in Fig. 1, that is to say, directly over the six thousand pound mark on the indicator, if the rated capacity be six thousand pounds. The rated capacity of the truck may be changed if desired. For instance, on the dial 61 of the indicator E, and

for example, 6 of the 6000 load mark could be changed to 4, making it a 4000 pound loadometer instead of a 6000 pound. By these changes one type and size of loadometer could be used on any size or capacity of motor truck., When the index finger 60 reaches the dotted line, position shown in Fig. 1, that is to say, when the maximum capacity has been reached, the insulated brush 63 of the indicating instrument E comes into contact with the contact segment 57, thus completing the circuit through the battery 52, switch 53, the contact segment 57, the axis 58' of the instrument'the metal frame 62 of the instrument, and also through the alarm 64 by way of the supplemental battery 52, thus causing the alarm to sound. The alarm will continue to sound until the load isdecreased on the truck, and as the load is decreased more or less resistance is cut into resistance changing circuit, thereby, slightly demagnetizing the stationary coil 55, permitting or causing the contact segment 57 to be rotated out of the path of the insulated contact brush 63 breaking the electrical connection to the alarm. In the event of a weakening of the springs 16 causing the springs to be depressed or flattened out of their normal condition, when no load 1s on the truck, thus causing the contact arms 34 to be shifted from their normal operative positions and thereby accidentally cutting out resistance when none should be cut out, it is simply necessary to remove the cover parts 12 of the casing A of the resistance changing devices and then properly adjust the contact arms 34, by loosening the set screws 35 and subsequently tightening the same, after which the cover part 12 is placed on the casin A. v a

What is c aimed is:

and wheels of a vehicle, supporting springs adjacent to each wheel, electro-mechanical resistance changing devices connected to the body and the spring at each end of each axle, electrical means connected to the resistance devices and operable under the influence of the latter to indicate the maximum load capacity of the vehicle, and means audibly indicating when the aforesaid indicating means has been operated to indicate the maximum load capacity.

2. The combination of the axles, body and wheelsof a vehicle, supporting springs adjacent to each wheel, electro-mechanical resistance changing devices connected to the body and spring at each end of each axle, and electrical meansgcommon to all. of the resistance devices and operable under the influence of the latter to indicate when the maximum load capacity ofthe vehicle has been reached. a

resistance changing 3. The combination with the axles, body and'whels of a vehicle, supporting springs adjacent to each wheel, electro-mechanical devices having connection with the spring for operation under the action of the latter and arranged one at each end of each axle, and means connected to the electro-mechanical resistance changing devices and operable under the influence of the latter to indicate when the maximum load capacity of the vehicle has been reached.

4.- The combination of the axles, body and wheels of a vehicle, su porting springs be-- tween the axles and t e body of the vehicle, electro-mechanicztl resistance chan ing devices having connection with said springs for operation under the influence of flattening of said springs incident to weight,

on the body of the vehicle, and electrical means electrically connected to the resistance changing devices and operable under the influence of the latter to sound an alarm when the maximum capacity of the vehicle has been reached.

5. The com ation of the axles, body and wheels of a *le. supporting springs be tween the axle. ..'..d the body of the vehicle, resistance changingdevices having connec- 1. The combination of the axles, body tion with the springs for operation 1 when the bodv is depressed incident to a load trically connected to the resistance changing devices to sound an alarm when the maxi-' mum loadcapacity of the vehicle has been reached.

placed thereon, and electrical means elec-' 6. The combination of the axles, body, 1

and wheels of a vehicle, supporting springs between the axles and the body, resistance changing devices having connection with the springs for operation upon flattening of the latter incident to weight placed on the body, and a common means connected to all of the resistance changing devices to indicate the weight of the load placed on the vehicle and tdindicate when the maximum load capacity'has been reached.

7. The combination of the axles, body and wheels of a vehicle, supporting springs between the axles and the body, reslstance changing devices having connection with the springs for operation u on flattemng of the latter incident to weig t placed on the body, and a common means connected to all,

of the resistance changing devices to indicate the weight of the loa hicle, and an alarm connected to said electrical means to audibly indicate when the maximum load capacity of the vehicle has been reached.

8. The combination of the axles, body and wheels of a vehicle, supporting springs between the axles and the body 0 the vehicle, electro-mechanical resistance changing deplaced on the vew vices connected one to each of the springs,

each resistance device comprising a casin r a plurality of contact members w thin eac Y casing insulated from the latter and from one another, a plurality of resistance changing devices connected in series to the contact members,'a swinging contact arm mounted in the casing an carrying a contact mem- I ber for successive engagement with said contact members, a gear mechanism wherebv theswingin contact arm is swung step by ste under t e influence of weight on the ve-' hice body, a resistance ehanging electric circuit having connection with each resistance changing device and including a battery and a switch and an indicator in said circuit to indicate when the maximum load capiacity of the vehicle has been reached, an

to the aforesaid circuit and including a batan alarm circuit operatively connected I tery and'an alarm which latter is operable 1 to audibly indicate when the maximumload capacity of the vehicle has been reached.

9. The combination of the axles, body and wheels of a vehicle, supporting springs between the axles and the body ofthe vehicle, electro-mechanical resistance changing devices having connection with the springs for operationwhen the body is depressed incident to a load placed thereon,

to indicate the amount of load placed on c the vehicle, and an alarm circuit connected to the indicator and the aforesaid circuit and including a battery and an alarm'to sound the latter upon a predetermined amount of resistance being cut out of the first named circuit incident to load on the vehicle.

10. The combination of the axles, body and wheelsof a vehicle, supportin springs between the axles and the body 0 the vehicle, electro-mechanical resistance changing devices having connection withthe springs for operation when the body is depressed incident to a load placed thereon, an electrical resistance changing circuit in which said electro-mechamcal resistance changing devices are connected in series and I including a battery,- switch and an indicator to indicate the amount of load placed on f the vehicle, and an alarm circuit connected to the indicator and the aforesaid circuit and including a battery and an alarm tosound the latter upon a predetermined amount of resistance being cut out of the first-named circuit incident tOyl'Ofld on the vehicle, the battery of the alarm circuit fur. nishing an independent source of current to sound the alarm independently of the battery of the resistance'c an 'ng circuit.

11. The combination o a vehicle body, electro-mechanical resistance changing devices operable under the iniiuence of the load placed onthe Vehicle body, an electric resistance changing circuit in which said electro-mechanical resistance changing devices are connected in series and including a battery, switch and an indicator to visibly indicate the amount of load placed on the vehicle, and an alarm circuit connected to the indicator and to the aforesaid circuit and im eluding a battery and an alarm to audibly indicate when a predetermined amount of resistance has been cut out of the firstnamed circuit incident to load on the vehicle body.

12. The combination of a vehicle body which is subject to depression, resistance changingdevlces operable under the influence ofthe vehicle body when depressed in- I cident toload' placed thereon, a common means connected to all of the resistance bhanging devices to visibly indicate the weight or load placed on the vehicle body, and means operatively connected to the visible indicating means tp audibly indicate when the visible indicating means operates to indicate the amount of load placed on the vehicle body.

13. The combination of a vehicle including a body, means to yieldingly support the body, a resistance changing circuit carried resistance by the vehicle, means for changing the resistance in said. circuit proportionate to the load, a visible indicator connected in said circuit, the indicator being controlled according to the electrical variations in the resistance changing circuit incident to operation of the resistance changingmeans 'upon depression of the vehicle body againstthe action of said yieldable supporting means,

and an electric alarm circuit electrically connected to the resistance changing circuit and and Wheels ofa vehicle, supporting s rings between theaxles and the body of t ,e vehicle, resistance changing devices connected one to each of the springs, each resistance device comprising a casing, a plurality of contact members within each 'casingin'sulated from thelatter and from one another, a plurality of resistance devices connected in series to the contact members, a swinging contact arm mounted in the casing and carrying a. contact member for successive engagement with said contact members, means whereby the swinging contact arm is swung step by step under the influence of weight on the vehiclebody, and an indicator electrically connected to each of said electro-mechanical resistance changing devices to indicate when the 'rated capacity of the vehicle has been reached.

15.The combination of the axles, body and wheels of a vehicle, supportin springsbetween the axles and the body 0 the vehicle, resistance changing devices connected one to each of the springs,'each resistance device comprising a,cas1ng, a plurality of contact members withineach casing insulated from the latter and from one another, a plurality of resistance devices connected in series to the contact members, a swinging contact arm mounted in the casing and car- 'rying a contact member for successive engagement with said contact members, means whereby the swinging A contact arm 1s swung step by step under the influence of weight on the vehicle body, an indicator electrically connected to each of said electromechanical resistance changing devices to indicate when the rated capacity of the Vehicle has been reached, and means operat ng simultaneously with the aforesaid indicating means to indicate audibly when the predetermined rated capacity has been reached.

.16. The combination with a vehicle, electro-mechanical resistance changing devices having operative connection with the body for operation upon depression of the latter incident to weight placed on the body, each resistance changing device comprising a casmg, a plurality of resistances in each casing connected in series to the respective contact members, a swinging contact arm mounted in the casing and carrying a contact mem her for engagement with said contact members, a gear" mechanism whereby the swinging contact arm is swung step, by ste under the influence of weight on the vehicle body, and a resistance changing electric circuit having connection with each resistance changing device and including a battery and a switch, and an indicator in said clrcuit to indicate when the maximum load capacity of the vehicle has been reached.

17. The combination with a vehicle, electro-mechanical resistance changing devices having operativeconnection with the body for operation upon depression of the latter 1 incident to-weight placed on the body, each resistance changing device comprising a casing, a plurality o resistances in each casmg, connected in series to the respective contact members, a swinging contact arm mounted in the casing and carrying 'a contact member for engagement with said contact members, 'a gear mechanism whereby the swinging contact arm is swung step by step under the influence of weight on the vehicle body, and a resistance changing electric circuit having connection with each resistance changing device and including a battery and a switch, and an indicator in said circuit to indicate when the maximum load capacity of the vehicle has been reached, and an alarm circuit operatively'connected to the aforesaid circuit and including a battery and an alarm which latter is operable to audibly indicate when the maximum load capacity ofthevehicle has been reached.

18. The combination with a vehicle, electro-mechanical resistance changing devices having operative connection with the body for operation upon depressionof the latter incident to weight placed on the body, each resistance changing device com risin a casing, a 'plurality of contact mem ers within each casing, a plurality of resistances-in each casing connected in series to the respecincident to weight placed on the body, each resistance changin device comprising a car; -mg a plurality 0 contact members within eac casing, a plurallty of resistances in each casing connected in series to the respective contact members, a swinging contact arm mountedin the casing and carrying a contact member for engagement with said contact members, a gear mechanism whereby the swinging-contact arm is swungstep by step under the influence of weight on the vehicle body, anindicator to visibly indicate when the maximum load ca acity of the vehicle has been reached, an means cooperating with the visibly indicating means to audibly indicate when the maximum load capacity of the vehicle has been reached.

20. The combination of a vehicle includinga body, means for yieldably supporting the bod an electrical circuit carried'by the vehicle ody, an indicating means connected in said circuit, overlapplng members connected to the vehicle body and to the yieldably supporting means therefor and which 'areadaptedto fold with relation to each other upon depression of the vehicle body against the action of said springs, and contact members having connection with said overlapping and foldable members and included 1n said circuit and which are arranged to contact with each other upon folding of said overlappin and foldable connections between the ha y and yieldable supagainst the action of the yieldable support- 1 ing means and thereby operate said indi cating means.

21, The combination of a vehicle including a yieldably supported body, a resistance changlng circuit carried by the vehicle, an electro-mechanical resistance changing device arranged in the said circuit and connected with the body of the vehicle and porting means when the .body is depressed operated by the movement of the body under the influence of a load, and an indicator also connected in said circuit and controlled by the resistance changing device. a

22. The combination of a vehi le including a yieldably supported body, a resistance changing CiICIIItcarried by the vehicle, a plurality of electro-mechanical resistance changing devices located at spaced points and arranged in the said circuitand connected with the body of the vehicle and operated by the movement of the bod under the influence of a load, and an in icator also connected in said circuit, and controlled by the resistance changing devices.

In testimony whereof I hereunto aflix my signature, this 19th day of July, 1917.

FREDERICK J. TROLL.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2470069 *Feb 10, 1944May 10, 1949Budd CoCenter of gravity and weight indicator
US2473578 *Apr 3, 1945Jun 21, 1949Liquidometer CorpTotalizer
US2540807 *May 25, 1944Feb 6, 1951Gen ElectricCenter of gravity indicator
US2615330 *Nov 13, 1945Oct 28, 1952Douglas Aircraft Co IncWeight and balance indicator
US2759079 *Oct 26, 1953Aug 14, 1956F L HopkinsonElectric indicator
US2759356 *Oct 20, 1952Aug 21, 1956Douglas Aircraft Co IncWeight and balance indicator
US2813709 *Jan 6, 1954Nov 19, 1957Ohio Commw Eng CoStrain gauge load indicator