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Publication numberUS2019299 A
Publication typeGrant
Publication dateOct 29, 1935
Filing dateFeb 3, 1934
Priority dateFeb 3, 1934
Publication numberUS 2019299 A, US 2019299A, US-A-2019299, US2019299 A, US2019299A
InventorsFoster Holmes, Fox Alexander P
Original AssigneeLincoln Eng Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Lubricating apparatus
US 2019299 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

A. P. Fox l-:r AL.

I LUBRICATING APPARATUS Filed Feb. :5. 19:54

4Q ro 554mm um, Q

INJECTO PUMP l lmzs; 1935.

@NRE KOFOKPZOO mow Patented Oct. 29, 1935 s PATENT OFFICE LUBBICATING APPARATUS This invention relates to lubricating apparatus Alexander P. Fox, University City, and Foster Holmes, Normandy, Mo., assignors to Lincoln Engineering Company, St. Louis, Mo., a corporation oi' Missouri Application February a, 1934. sum1 N. 109,516

1s claim. (ci. isa-'n by uuid from the respecuveune s or n.

Each

and with regard to certain more specic features, to lubricating apparatus operable to distribute controlled quantities of lubricant or the like to two or more pipes, under pressure.

The invention is an improvement upon the structure described in United States Patent 1,805,303, issued to Frank S. Barks, dated May 12, 1931, and United States Patent 1,990,986, issued to Alexander P. Fox, dated February 12, 1935, for Lubricating apparatus.

Among the several objects of the invention may be noted the provision of apparatus of the class described which is self-timed and self-actuating to effect complete single cycles oi.operation, asdistinguished from multi-cycle operations or fractional cycle operation; and the provision of apparatus of the class described which is simple and reliable. Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly comprises the elements and combinations of elements, features of construction, and arrangements of parts which will be exemplified in the structures hereinafter described, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawing, in which is illustrated one of various possible embodiments of the' invention, the single gure is a schematic layou Similar reference characters indicate corresponding parts throughout the drawing.

Inasmuch as the essential features oi' the hydraulic parts of the invention have already been described in detail in said patents, these will be iescribed herein in -terms of operation as rolows:

Broadly, there is provided a fluid supply Y from which fluid is withdrawn by means of a pump P and delivered to a line 23, through a strainer 3 and to an inlet 65 and to an alternating distributor i, there being within the distributor I a directing valve 15 which directs fluid into one or the other of outlet lines 9 or Il. -These lines 9 and II correspond to similar lines in said Patent 1,805,303. From theselines the grease is measured out inpredetermined quantities by suitable measuring injector pumps or valves PU. Further detailed description oi' valves PU is believed to be unnecessary in view of the detailed description'in United States Patent 1,935,150, issued to Alexander P. Fox and William Z. Linders, dated November 14, 1933.

Each line 9 and I I is provided with a branched pressure regulating resistance valve operated of these resistance valves permits the pressure in its respective line to build up to a predetermined maximum, after which the respective valve operates to release and shunt fluid from the line s under pressure to operate said directing valve so that the latter redirects iiuid into the other line. The outlet line which is not in communication with the inlet 05 is exhausted to the supply by the directing valve 15, whereby the back pres- 10 sure of iluid in that line is relieved or reduced. Also, means is provided whereby the fluid used for operating the directing means is relieved of pressure and re-delivered to the supply after it hasceased its function oi' shifting the directing 15 valve.

Speciilcally, the pump P is actuated by an electric motor M acting through a suitable speed reducer S. 'I'he motor circuit L is adapted to be opened by a pressure responsive switch W under predetermined conditions of pressure in a line I9. Further electrical circuit features are comprised in the invention and will be particularized hereinafter.

In the drawing, the dark stippling indicates grease under high pressure, and the light stippling indicates grease under a lower release pres- As shown, lubricant, such as grease, or like material, enters under considerable pressure through the inlet 23, and passes into and through the filter I. The motor M and the pump P build up the pressure while they are running. Next, the filtered grease passes through the inlet line 05 and reaches an annular region 63 formed by a as groove 19 in piston valve stem 19.

Depending now upon the position of the piston 15, which determines the position of groove 19, the grease passes, by way of said groove 19, to either a passage 85 or a passage 81. For the 40 present, the grease will be considered as passing to the passage B1 implying that the valve 15 is in a position opposite to that shown. The passage 81 conducts the grease to delivery pipe II. It will be assumed that the pipe II, and devices connected thereto, are already lled with grease, so that pressure is promptly built up in line II. This pressure forces some of the grease out through the respective passage 95 to approach the space provided by counterbore 91 but'here it 50 is stopped by the valve element 13|. The pressure of grease builds up until it is great enough to unseat the `valve element III against spring |21, which has been set at a predetermined pressure by manipulation of adjusting plug ill. It

will be noted that the backingplugs IIS for the springs |21 are screw threaded into the bodies which hold the springs. Unseating of the valve element I3I moves pin I2 I, and hence gives a visible signal at the exterior of the device.

Having unseated valve element |3I, the grease passes into counterbore 91. After unseating, the area pressed against by the grease is increased. Hence with the small projected area at |31 when the valve |3| is closed, la relatively small spring |21 may be adapted to maintain closure against high pressures but after opening, the increased area presented insures maintenance of opening. With the upward movement of the pin I2I, its lowermost, narrowest portion |29 is moved so v that a passage is provided therearound from bore shown in the drawing to represent this last con- 91 through bore |49, to annular region |41. An exhaust opening I5I vhis; meanwhile been shut oi! by plug |52.

From the annular space |41 the grease is now compressed through passage |59 into a central, mainbore 91 which holds valve 15, but in this case at the end oi Said bore. As the grease fills the bore 51, it exerts a pressure upon the end of piston element 15, and ultimately drives said piston to the left to the other end of the bore 51. 'Ihis change of position of the piston 15 changes the position oi' notch 19 to the extent that lubricant is now directed into line and pipe 9, instead of into line 91 and pipe II. Also, pressure is relieved in line II by notch 19 in valve 15. Relief occurs through a check valve |89 to a return line I5 leading to the supply. The parts are dition.

The pressure in line 9 is communicated to pump PU, as well as to its respective valve I3I to liftv the same and to causedeliveryhof a charge to the opposite end of the pistonvalve 15, thus returning the valve 15 to the original position. 'Ihe -return causes a groove 11 to be aligned with passage 83 so that pressure is relieved in the pipe 9 through the check valves |59 and |91 to the return pipe I5. At the same time the surge engendered as this high pressure is relieved, is not instantaneously dissipated, because of friction in the lines and the resistance of check valves |59 and |81. Hence instantaneous building up of pressure occurs in a branch line I9 which leads to the switch W. This causes opening of the switch W and deenergization oi the motor M as will be further particularized. It will thus be seen that the 'apparatus has made a complete cycle of operation and then is automatically cut out of operation by its own functions.

The surge abve referred to is dissipated through the check valves |59 and |91 shortly after occurring. 'Ihis causes a reclosing oi the switch W but by this time independently controlled apparatus.. in the line L causes an opening ofthe circuit at another point. This apparatus in con- 'nection with line L will be described shortly. Thus, although the switch W is closed to potentially restart the motor M, the circuit L is open. Restarting is eiected by said other means in the line.

When alternation takes place, the supply of high pressure grease is at once cut oi! from the back to passage |59, annular space |41, bore |5|.

passage |53, check valve |99 to exhaust I5, thus relieving the pressure.

' In order to prevent the piston 15 from at any time being heid on dead center (such that grease is supplied to neither passage 85 nor passage 91), the notch 19 is preferably made a little longer than the distance between the closest edgesof passages 85 and 91, so that it is, at all times, necessarily in communication ywith one of said passages.

The check valves |81 and |99 prevent the surge engendered by the release of high pressures in therespective lines 9 and II from being improperly delivered to the opposite ends of the valve15. They prevent the valve 15 from being balanced after partial movement by the pressure engendered at eachend by the surge effected when relieving the respective lines 9 or I| of pressure. Thus these respective check valves |91 and |89 each protect one end of the valve stem from being subjected to the surge or exhaust pressure while the other end is being acted on by pressure shunted from the lines 9 or under pressure.

As to the check valve |59, it will be noted that it has no counterpart in the passage |64, because the passage |54 does not communicate with any linev such as I9. As will be remembered, the line I9 communicates back pressure to the pressure switch which controls the operation of a compressor for delivering grease to the inlet line 23. The check valve |59 prevents pressure of trapped grease which is exhausting from behind the adjacent or lower end of valve stem 15 from reaching passage I9, said returning grease being delivered through the check valve |81 to the line I5.

'I'he combination of parts indexed on the drawing as pump, reservoir, iilter, resistance pressure regulator and distributing valve are shown and claimed in said Patent 1,990,986.

It is the purpose of the present invention to combine with the above apparatus, a timing apparatus, such that the motor M is energized only for whole, single cycles of action of the valve 15, and thus to obtain exactly measured quantities forced into lines I2 and I3 by the pump PU, rather than unknown and variable quantities. 'I'he circuit for accomplishing this end is shown at L.-

The circuit L comprises a line circuit 29| serving the motor M. At this point, it is to be understood that said line circuit 29| may open and close a solenoid air valve, if it be desired to control an air engine which may be used for actuating the pump P instead of the motor M. The line circuit 29| may be referred to as a motorizing circuit for initiating and maintaining pump action.

Lines 293 indicate a time-switch circuit foi the motor of an adjustable time switch 295 This switch motor revolves continuously.

Lines 291 indicate a momentary contactor circuit. 'I'he momentary contactor circuit 251 feed: the motor of a momentary contactor mechanism 299 by way of contacts 221 of said adjustable time switch 295. The contacts 221 are in circuit 291.

Numerals 2|| indicate a magnetic switch pickup circuit energized through the switch 233 o1 said momentary contactor 299. The contact: 233 are 1n circuit 2I'I.

Numerals 2I3 indicate a magnetic switch keer and break circuit having therein the contact 2|! of the pressure switch W.

A magnetic contactor 2I1 is used to make an( breakthe motor circuit and also to complet circuit 2I3, said contactor being normally held open by a spring 2I9 and closed by the magnetic action of a coil 22| in the magnetic switch pickup circuit 2| I.

Referring to the adjustable time switch 205, it will be seen to comprise a pair of adjustable cams 223 controlling by their rotation and by their relative positions a pair of leafspring followers 225, said followers controlling the opening and closing of the contact points 221.

'I'he 'momentary contactor 209 comprises a motor driven cam 229 which controls a leaf spring follower 23| for controlling opening and closing ot the contacts 233. The period of closing oi the switch contacts 233 is preferably slower than the period of closing of switch contacts 221. This is because the angular velocity of cam 229 is less than that of the cams 223. Hence the cam 229 may revolve-only a part of 360 degrees for every 360 degrees of movement of cams 223. Also, relative adjustment of cams 223 determines the time of closure of contacts 233 and this determines the advance of cam 229 per revolution of cams 223.

'Ihe operation of the circuit is as follows:

'Ihe line 20| is suitably energized. The motor M is not running because the magnetic contactor 2|1 is open. However, the time switch circuit 203 is always closed through the motor of time switch 205. Thus the motor of time switch 205 is rlmning continuously. 'I'he relative adjustment of the pair of time switch cams 223 is such that the contacts 221 are closed for a suitable period of time, say at intervals of one minute. Closing of the contacts 221 causes energization of the momentary contactor circuit 201, thus causing rotation of the motor of the momentary contactor 209 so as to ultimately close -the contacts 233 by means of 'cam 229. It is to be understood that several cyclic closures of contacts 221 may be required to cause a closure of contacts 233. closure of contacts 221 which in turn depends upon the adjustment of cams 223. It also depends upon the period of cam 229.

Closure oi the contacts 233 results in the magnetic switch pick-up circuit 2|| being energized to close the magnetic contactor 2 I1, whereby the motor M is energized to cause the pump P to operate.'

As soon as the circuit 2I| becomes energized,A the'magnetic switch keep and break circuit 2I3v also becomes energized, through the now closed contactor 2I1, and this circuit also includes the holding coil 22| so that the magnetic contactor 2 I 1 remains shut against the action of its holdout spring 2|9, as long as the contacts 2|5 of pressure switch W are closed. .Under these circumstances, the momentary contactor 209 may cause reopening of the contacts 233 without affecting the closed condition of the magnetic contactor 2|1.

In view of the above, it will be seen that the motor M will run and cause the distributing valve I to operate, andthe latter will pass through one cycle of operation, aiter which the described surge in line I9 will operate the pressure switch W so that its contacts 2|5 part, thereby to open the magnetic switch keep and break circuit 2I3. 'Ihe solenoid 22| becoming deenergized permits the magnetic contactor to reopen under action oi' its spring 2|9. 'I'he motor circuit is thus opened and pumping positively ceases and another cycle of action of the distributor is prevented. A further consequence is that cyclic action does not start in the mid-portion of a cycle.

' In the meanwhile, the adjustable time switch The number depends upon'the time of4 205 has been continuing to move so that after a predetermined open period. the contacts 221 again close and the cycle repeated, but perhaps requiring several revolutions of cams 223 in order to cause cam 229 to again operate the contacts' The reason for using the momentary contactor 209 in conjunction with the time switch 205 is to gain a range of adjustments of cyclic periods which would otherwise be xed by the initial rate assigned to the time switch 205, if, as might be. the contacts 221 were used to energize coil 22|. For instance, if the gearing in the momentary contactor 209 is such that the cam 229 has a lower angular velocity than the angular velocity of cams 223, then it may require a plurality oi' closures of contacts 221 (revolutions of cams 223) in order to cause one closure of switch 233 (revolution of cam 229) And it will be noted that the relative adjustment of cams 223 determines the time of closure of contacts 221 and hence the time during which advance of cam 229 takes place per revolution of cams 223. Hence the angie of advance of the cam 229 per closure of switch 221 is a function oi' the angular adjustments between cams 223. II.'v the advance time of cam 229 is relatively great, the contacts 233 will close oftener; whereas if the tim'e of advance is relatively less, the contacts 233 will close less often. The time is controlled by the adjustment of cams 223. Thus is effected a wider range of periods of closure of contacts 223 than could be had were the contacts 221 used to directly energize the coil 22 I.

From the above it will be seen that there is an assurance that at adjustable predetermined intervals of time the switches 205 and 209 will operate to cause energizationv of the motor M. The motor M will be energized as long as the pressure switch W is not under influence of any momentary surge such as determines the completion of one cycle of operation of the distributing valve Only after such a cycle has been completed will the momentary opening of pressure switch W cause opening of the motor circuit. Furthermore, the pressure action on the switch W needs'only be momentary (a surge), because upon the contacts 2I5 reclosins. the magnetic contactor 2|1 has opened the circuits 2II, 2I3, until the cycle is again initiated by a complete revolution of the contactor 209.

Among the advantages of the invention are the following:

l. At speciiically timed intervals and not otherwise the pump P is started so as to feed iluid through the distributingV valve I to the injector pump. PU. the latter receiving a charge at both ends because of the complete cyclic operation of the distributing valve 2. 0nce the operation of the distributing valve I is started, it continues throughout one complete cycle so as to ensure all bearings receiving lubricant, regardless of the further action of the time switch 205 and the momentary contactor 209.

3. After the distributing valve I has/completed one cycle, the pump ceases to operate and thus there is no possibility of several cycles of operation occurring to overload the bearings and cause waste of lubricant.

4. There is no possibility of a distributing valve I ceasing nor starting operation in the mid-part of a cycle.

5. All bearings receive predeterminately calcuvils 6. Thepressureiniinesaand II may beregulated so as to meet various resistances in lines v I2 and I3 without interfering with the accurately timed action.

7. A wide variation of timing of the cycles oi action is possible by the use o! the combination of devices 205 and 209.

While -the device has been herein described in yconnection with the handling or lubricants, particularly grease, it will be apparent that other uids might also b e handled without departing from the neld ofthe invention.

Period of closure is herein dened as the time that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

We claim:

l; In lubricating apparatus. a lubricant supply, a pump adapted toforce lubricant from said supply. a hydraulic system adapted to receive said lubricant, a pressure switch, means in said hydraulic lsystem whereby said pressure switch is temporarily opened for each cycle of action of said hydraulic system. a drive for the pump, an electrical circuit i'or initiating action of the driving means, adjustable timing means adapted to periodically temporarily close said circuit to eifect said initiation, said pressure switch being adapted to maintain closure oi said circuit after temporary closure thereof by said timing means, and means for automatically opening the circuit when said pressure switch temporarily opens.

2. In lubricating apparatus, a lubricant supply, a pump adapted to torce lubricant ironr said supply, a hydraulic system adapted to receive said lubricant, a pressure switch, means in said hydraulic is temporsystem whereby said pressure switch oi said hyarily opened -for each cycle of Aaction draulic system. a drive for the pump, an electrical.

circuit for initiating action ot the driving means, timing means adapted to periodically temporarily close said circuit to eii'ect said initiation, said pressure switch being-adapted to maintain closure of saidcircuit after temporary closure thereor by said timing means. and means for automatically opening the circuit-when said pressure switch temporarily opens at the end oi each cyclic action of said hydraulic circuit. f

3. In apparatus ot the class described, compression means, an electric system adapted to initiate and maintain action of said compression means, a pressure switch controlling said system, a body having an inlet, said compression means supplying iiuid to the inlet, said body also having a plurality o! outlets, a plurality of exhausts and a pressure switch connection, a movable distributing valve in said body adapted in alternate positions to connect the inlet with one outlet while independently connecting the other outlet to one or saidexhausts, resistance valves associated with said outlets adapted to assume open and closed positions, means connecting said outlets with opposed areas on the distributing valve whereby movement of the distributing valve is eiIected under outlet pressure when the respective resistance valves are open, means connectingV said distributing areas to the respective exhausts when said resistance valves are closed, a throttle connection opening'irom said switch connection to one of said exhausts, a port on said distributing valve adapted in one position of said distributing valve to connect one of said outlets with the pressure switch connection when said distributing valve is in exhaust position with respect to the last-named outlet, said electric system comprising a motorizing circuit, a magnetic contactor therein, a magnetic coil for holding closed said contactor, an adjustable time switch adapted to operate continuously, a. momentary contactor controlled by said time switch, said momentary contactor energizing said coil to close the magnetic contactor, said pressure switch being normally closed and thus adapted to maintain the magnetic contactor in closed position, and means for opening the magnetic contactor when said pressure switch temporarily opens under surge conditions in the pressure switch line due to said throttle connection. i

4. Apparatus made in accordance with claim 3 and. including regulating means for said resistance valves adapted to determine the outlet pressures at which the respective valves shall open without aecting the timing ci electrical operation.

5. Apparatus made in accordance with claim 3 and including means for independently regulating the resistance of said resistance valves to control the respective pressures in the respective outlets at which said respective resistance valves shall open, without ail'ecting the timing oi' said adjustable time switch.

6. In apparatus of the class described, a iluid reservoir having an outlet, a hydraulic system connected with said outlet adapted tocperate cyclically, a pressure switch, said hydraulic system operating said pressure switch to open temporarily after each cycle of operation, a pump adapted to pump fluid from said reservoir and deliver it to said hydraulic system, 'means for driving said pump, an electrical circuit for initiating energization of said pump driving means, an automatically opening magnetic contactor in said circuit, a holding coil adapted to hold said contactor closed, the contact o! said pressure switch being in series with said holding coil, a time switch, means for energizing said time switch, means adapting said time switch to temporarily energize said holding coil when the magnetic contactor is open, said pressure switch per- `manently energizing said holding coil when its contacts are closed and aiter the holding coil has been initially energized, but when opened effecting the reopening of said magnetic contactor.

v'1. In apparatus ot the class described, a fluid reservoir having an outlet, a hydraulic system connected with said outlet adapted to operate cyclically and to produce a surge once per cycle,

a pressure switch subject to and opened temporarily by said surge, a pump adapted to pump fluid from said reservoir and deliver it to'said hydraulic system, means for driving said pump,

an electrical circuit for initiating energization of said pump driving means, an automatically opening magnetic contactor in said circuit, a holding coll adapted to hold said contactor closed, the contact i said pressure switch controlling said holding coil, a time switch, means for energizing said time switch, means adapting said time switch a. In apparatus of the class described, a, fluid reservoir having an outlet, a hydraulic system connected with said outlet adapted to operate cyclically to produce a surge, a normally closed pressure switch subject to the surge and adapted to open in response thereto, a pump adapted tol -pump iluid from said reservoir and deliver it to said hydraulic system to cause the system to operate, means i'or driving said pump, an electrical circuit for energizing the driving means for said pump, a contactor in said circuit, means adapted to close said contactor and so hold it including said pressure switch, and means to cause the contactor to open and remain open when the pressure switch is temporarily opened.

9. In apparatus of the class described, a uid reservoir having an outlet, a hydraulic system connected with said outlet adapted to operate cyclically, a pressure switch, said hydraulic system operating said pressure switch to open temporarily after each cycle oi operation, a pump adapted to pump fluid from said reservoir and deliver it to said hydraulic system, means ior driving said pump, an electrical circuit for initiating energization of said pump driving means, an automatically opening magnetic contactor in said circuit, a holding coil adapted to hold said contactor closed when the coil is energized, the contactI of said pressure switch being in series with said holding coil, an adjustable timing switch to operate to make and break a circuit, means for energizing said timing switch, a momentary contactor energized intermittently by said last-named time switch circuit to temporarily energize said holding coil from time to time to close the magnetic contactor, said pressure switch'further energizing said holding coil after each closure thereof and causing the holding coil to reopen when the pressure switch opens.

10. In apparatus ofthe class described, a fluid reservoir having an outlet, a hydraulic systemY connected with said outlet adapted to operate cyclically, a pressure switch, said hydraulic system operating said pressure switch to open temporarily after each cycle oi' operation, a-pump adapted to pump fluid from said reservoir and deliver it to said hydraulic system, means for driving said pump, an electrical circuit i'or initiating and maintaining energization of said pump driving means, a magnetic contactor in said circuit, a holding coil adapted after closure of said contactor to hold the samefclosed, the contact of said pressure switch when closed energizing said holding coil, a time switch, a circuit therefor, means for energizing said time switch to repeatedly make and break its circuit, a. momentary contactor switch in the switch time circuit, a contactor circuit therefor, said holding coil being initially and temporarily energized by said contactor switch after closure of the con tactor switch by repeated operations of the time switch, said holding coil being maintained in energized condition after reopening oi 4the contactor switch by a closed condition oi' the pressure switch and being deenergized when said pressure switch opens.

11. In apparatus oi the class described, a iiuid reservoir having an outlet, a hydraulic system connected with said outlet adapted to operate cyclically, a pressure switch, said hydraulic system operating said pressure switch to open temporarily after each cycle o f operation, a pump adapted to pump fluid from said reservoir and deliver it .to said hydraulic system, means for 5 driving said pump, an electrical circuit for initiating and maintaining energization oi' said pump driving means, a magnetic contactor in said circuit, a holding coil adapted after closure of said contactor to hold the same closed, the contact of said pressure switch when closed energizing said holding coil, a time switch, a circuit there# for, means for energizing said time switch to repeatedly make and break its circuit, a momentary contactor switch in the time switch circuit, a contactor circuit therefor, said holding coil being initially and temporarily energized by said contactor switch after closure of the contactor switch by repeated operations of the time switch, said holding coil being maintained in energized condition only by a closed condition of the pressure switch and being deenergized when said pressure switch opens, the period of the contactor switch being in a fixed ratio les than that of the timing switch.

12. In apparatus oi the class described, a iiuid reservoir having an outlet, a hydraulic systemv connected with said outlet adapted to operate cyclically, a pressure switch. said hydraulic system operating said pi essure switch to open temporarily after each cycle of operation, a pump adapted to pump fluid from said reservoir and deliver it to said hydraulic system, means for driving said pump, an electrical circuit ior mitiating and maintaining energization of said pumpI driving means, a magnetic contactor in said cir` cuit, a holding coil adapted after closure of said contactor to hold the same closed, the con-s tact of said pressure switch when closed ener` gizing said holding coil, a time switch, a circuit therefor, means for energizing said time switch to repeatedly make and break its circuit, a momentary contactor 'switch in the time switch circuit, a contactor circuit therefor, said holding coil being initially and temporarily energized by said contactor switch, after closure of the con-v taotor switch by repeated operations of the time switch, said holding coil being maintained in eny ergized condition only by a closed condition of the pressure switch and being deenergized when said pressure switch opens. the period of the contactor switch being in a ilxed ratio less Athan that of the timing switch, and means for adjusting the period of timing switch closure.

13. In lubricating apparatus, a pump, means 55, `for driving the pump, an electric circuit includJ ing means for initiating movement of the driving means, a constantly operating timing switch repeatedly closing accordingly to a predetermined period and for predetermined times, 0 means i'or adjusting the times of closure, a circuit connected with said timing switch, a momentary contactor 'driven irom said timing switch circuit and controlling said initiating means, the period of closure or said momentary contactor while being driven being slower than the period of closure of said timing switch wnile Operating."

14. In lubricating apparatus, a pump, means for driving the pump, an electric circuit includ- 7 ing means for initiating movement of the driving means, a constantly operating timing switch repeatedly closing according to a predetermined period, a circuit connected with said timing switch, a momentary contactor driven from said u timing switch circuit and controlling said initiating means, the period of closure of said momentary contactor while being driven being slower than the period o! closure oi said timing switch while running.

15. In lubricating apparatus, a pump, means for driving the pump, an electric circuit including means for initiating movement of the -driving means, a constantly operating timing switch closing according to a predetermined period, means for adjusting the time of closure during each period, a circuit connected with said timing switch, a momentary contactor driven from said circuit and controlling said initiating means, the period of closure oi' said momentary contactor while being driven being slower than the period of closure of said timing switch while running, a pressure switch, means whereby said pressure switch when closed maintains closure of said initiating circuit and means for opening said initiating circuit when said pressure switch is open.

16. In lubricating apparatus, a pump.,means for driving the pump, an electric circuit including means for initiating movement oi the rdriving means, a constantly operating timing switch closing according to a predetermined period, means for adjusting the time oi.' closure during each f period, a circuit connected with said timing switch,

17. In lubricating apparatus, a pump, means for driving the pump, an electric circuit including means vfor initiating movement oi the drivingv means, a constantly operating timing switch clos- I ing according to a predetermined period, a circuit controlled by said timing switch, a momentary contactor driven from said circuit and periodically controlling said initiating means, the period of said momentary contactor being slower than the period of said timing switch while running, a 10 pressure switch, said pressure switch being subjected to pressure engendered by said pump, and periodically operating uid controlling means be-v tween said pump and said pressure switch whereby said pressure is applied to said pressure switch in perodic surges according to periodic movement oi' said fluid controlling means.

18. In lubricating apparatus, a pump, means fordriving the pump, an electric circuit including means for initiating movement oi the driving means, a constantly operating timing switch closing according to a predetermined period, a circuit controlled by said switch, a momentary contactor driven from said circuit and periodically controlling said initiating v means, the period of said momentary contactor being slower than the period oi' said timing switch while running, a pressure switch, said pressure switch being subjected to pressure engendered by said pump, periodically operating uid controlling means between said pump and said pressure switch whereby said pressure is applied to said pressure switch in periodic surges according to periodic movement of said uid controlling means and means for azusting the intervals of closure oi said timing switch.

ALEXANDER P. FOX. FOSTER HOLMES.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2635710 *Feb 18, 1950Apr 21, 1953Stewart Warner CorpAutomatic control apparatus for centralized lubricating systems
US2695383 *Apr 6, 1950Nov 23, 1954Danly Mach Specialties IncElectrical control for power presses
US2891175 *Jun 5, 1957Jun 16, 1959Thiemann Albert ErnstMechanisms for periodically feeding materials in carefully metered quantities
US2935012 *Oct 8, 1958May 3, 1960Alan MartinCoffee brewer
US5174472 *Apr 18, 1991Dec 29, 1992Raque Food Systems, Inc.Control system for timing a sequence of events
US5375656 *Oct 14, 1992Dec 27, 1994Oil Dynamics, Inc.Low flow rate oil supply system for an electric submersible pump
US5730174 *Jul 1, 1996Mar 24, 1998Lubriquip, Inc.Solenoid valve cartridge for lubrication divider valves
Classifications
U.S. Classification184/7.4, 417/12, 318/452, 200/82.00R, 318/481, 222/643
International ClassificationF16N25/02, F16N25/00
Cooperative ClassificationF16N25/02
European ClassificationF16N25/02