US1716502A - Lubricating apparatus - Google Patents

Description

June 11, 1929.

H. J MURPHY LUBRICATING APPARATUS Filed Jan, 9, 1926A 2 sheets-sheet 1 .n.mwmml Imanes@ .1111.16 l, YH. MURPHY.

LUBRICATING APPARATUS Filled Jan. 9, 1926 2 Sheets-Sheet APl Ill was@

PATENTgoF-FICE'.

nowaan J. MURPHY, or BADING, Massacnusnr'rs; Assmann, BY MESNE ASSIGN- MENTS, T0 ALEMITE MANUFACTURING QORPORATIUH OF CHICAGO, ILLINOIS, A

conrozeATIoN or' DELAWARE.

LUBBIGATING APPARATUS.

Appncgan mea January 9, .1926. serial No. 80,247.'

This invention aims to provide improvements -in lubricating apparatus. y In the drawings, which ill strate a' pre# ferred embodiment of my invention Figure 1 is a diagrammatic'layout of a motor showing parts thereof in cross-section;

Fig. 2 is' a section of one of the chargedetermining lubricant devices showing the relation of' the parts when the chargefde- 4termining chamber is being filled with lubricant; h o

. Fig. 3 is a section of a charge-determlm n lubricant device similar to that shown in Fig. 2,A but showing the relation of the parts as the lubricant is being forced from the device; -A

Fig. 4 is a section on the line 4`4 o Fig. 1, being partly. in elevation and partly in cross-section;- 'A A Fig. 5.is.a section -on the line 5-5 of Fig. 1, being'partly in elevation; l

Fi 6 is aplan section of the means for starting and stopping the motor; and

Fig. 7 is a sectional form of charge-determining cup.

'Referring to. the drawings, I have illus' trated 'a4 central. lubricating Vs stem which is particularly, thou h not exc usively, useful for lubricating various parts of a motor vehicle.

The system shown'includes a plurality of lubricant cups v1, connected by a plurality of pipefs 2 to a l 'bricant pump 3. The piston .3a o.

tric 4 driven by asmall electric 'motor 5.

Means for` startin and stopping the motor and means for re ucing the pressure of the lubricant in the system after the motor has.'

stopped are also illustrated.

The general operation of some of theparts that make up the systemare substantially the same as shown andl described 1in my copending application SerialNo. 80,243 filed herewith. Therefore the description of this -of the system which arenew.

The means'for starting and stopping the motor 5 includes a pair of brackets 6 and 6 -secured to' the dash 7 (shown in dotted lines) ofthe vehicle to support a shaft 8.. To one end of the shaft is secured a ratchet wheel 9 which cooperateswith a reciprocable. pawl driven central lubricating systemf view of a lmodified piston member 10 mounted in one 'endo of the' braak'- etfa'and reciprocatedby a cam-11 driven bythe motor 5. The other end of the shaft 8 supports a disk '-12 of non-conducting material lnto which 'are set'two circular metal pieces 13and 14 joinedtogether by a narrow metal piece 15 (Fig. 5). The circular piece 13 formsla complete circle and is al- Ways in contact with an electrical contact 16 carried bythe bracket 6. The metalpiece' 14 doesA not form a complete circletheends being spaced apart to provide a break in the alsv circuit for purposes more fully hereinafter described.

lThe bracket 6, which carries the contact 16,. alsolcarries a second contact 17 bearing against the' disk 12 inthe path of the metal 'piece 14, as shown in Fig. 5. The v disk 12 yand the contacts 16and 1 7' cooperate'to provide an-electric switch lfor starting and stoping the motor. The disk is the rotary part of the switchand the contacts the stationary parts to which the wires are secured to conductthecurrent through the switch..

.A wire 18 connects the contact 17 with o ne poleof the motor 5. 'A' second wire 19 connects the contact 16 with one side of the battery other side ofthe battery with the other pole of the motor 5.

20 and a third. wire 21 connects'the The disk 12 carries a lug 22 which pro- Y jects therefrom into the path of apush rod 23 'secured to the dash and normally urged 4away from the lug by a spring 24. the pump is recprocated by an eccen-v The means for. reducing thev pressure of t-hev lubricant in the -pipe system and in the cups comprises a small cylinder block 25 cored to provide a piston chamber 26 (Fig. 5) in' which is .arranged a stem 27 'and' a` ton agalnst the shoulder33 at the end of, the stem as shown in Fig. 5.' One end ofthe stem 27 extends'from'the block 25. and ellgages the outer peripheral edge of the disk 12, thereby' to control the opening and closing of the outlet 30.

28.. An inlet passage 29' leads into i one end of the chamber 2 6 while an outlet the valve means and piston as a The charge determining vdevice or vcup WhichI have illustrated in Figs. 2 and 3 comprises a body portion formed of two separale partsv presenting, when secured together, a lubricant-measuring chamber 34,-an inlet passage 35 ,and an outlet passage 36. Within the chamber 34 is arranged a piston 37 and valve means. The valve means includes a valve 38 at the end of a valve stem 3 9 secured to the piston 37, and a valve seat part 40 surrounding the stem 39. A cupwasher 41 is provided to prevent leakage of lubricant around the outer periphery of the valve part 40, a metal washer 42 surrounds the stem 39 and presses against the washer 41 and a spring 43 is interposed between the piston 37 and the washer 42 normally to keep the valve 38 against' its seat as illustrated in Fig. 2. The chamber 34is enlarged slightly at the inlet end and a relatively weak spring 44is interposed between the Wall at the outlet end of the' chamber 34 and the valve seat part 40 normally to urge unit toward the inlet end of the chamber.

Assuming that the parts of the system are in their vnormal positions, as indicated in F ig; 1, the various parts of the vehicle (not shown) which are to be lubricated by the central lubricatingl system may be eiiciently and quickly lubricated and the operator need merely push on the push rod 23 "toldo so. As the push rod 23 engages the 1ug'22, the disk 12 is turned vslightly so as to bring the energized part 14 into contact with the contact. 17, thereby completing 'la circuit from the battery 20 to start` the velectric motor 5. The motor rotates the shaft 5` to whichthe cams 11 and 4 arelsecured. The cam 4 in turn operates the plunger 3of the pump 3'to draw lubricant from the lubricant reservoir 45, which may. be the crankcase of the vehicle, and forces it. through the vpipe system 2 to the cups 1, as more fully described in the abovementioned application. y

' The lubricant enters the inlet passage 35 of the lubricant cup 1 and owsaround the piston into the chamber 34 because of the enlargement at the inlet end thereof. As the valve 38 is normally closed (Fig. 2)-` the lubricant istrapped in the chamber 34 until it becomes filled, Then the lubricant acts upon the piston and valve means and forces thel whole as a unit against the pressure of the spring 44 to close the space around the piston 37. Immediately after the supply of lubricant Vto the chamber 34 is cut oil' by the piston 37, the spring 44 becomes fully l compressed and provides a stop against further movement of the valve seat part 40, cup Washer 41 and washer 42. As the piston 37 continues on its way into the chamber 34, it unseats the valve 38. As the diameter 'of the stem 39 is smaller`than the hole through ratchet wheel 9.

permit absolutely cutting off the passage of lubricant around the piston to the chamber 34 prior to opening the valve 38, thereby insuring the forcing of a measured quantity of lubricant from the 'cup at each operation/ The cup leather of the piston permits passage of lubricant from the chamber 34 to tlie'inlet side of the piston 37 during the movement of the piston from the time it cuts off` the supply of lubricant tothe cham-ber until the valve opens. Thereafter the lubricant presses the cup washer against the wall of the chamber 34 and prevents further leakage so that all vthe lubricant may be forced out of the chamber.

I During the time that the lubricant measurmg and expelling means in each cupis operatmg as described, the cam 11 operates the reciprocable paWl member 10 to turn the The wheel 9 rotates the shaft-8 and, as the disk 12 is carried by the shaft, it in .turn is rotated relative to the vcontacts 16 and 17. This operation continues the cups, dei ton 3a the ratchet Wheel 9 is turned one.

tooth so that the number of teeth equals the number of strokes required of the piston plus the number of teeth it takes to lill the space which the wheel is turned when the push rod 23 is operated. When the pump 3 has forced the required quantity of lubricant to i the cups 1, the disk Will be turned to the position shown in Fig.' 5 with the Contact 17 out of engagement with the metal piece 14, thereby breaking the circuit and stopping* the motor 5.

During the operation of forcing lubricant to the cups, the piston 28 in the cylinder 25 (Fig. 5) is held 'at the forward end of the .chamber 26 adjacent to the inlet passag"29 by the spring 31 and also by the disk 12 which presses the stem 27 inwardly, thereby preventing passage of lubricant through the passage'30. As the disk turns, it keeps the stem 27 pressed inwardly until it has vbeen turned to allow the stem toenter a low spot' or detent 45. This detent 45 is located at a point on the edge of the disk which will be opposite the end of the stem 27 when the contact- 17 runs off the end of the piece 14 as above described. Thus as the motor stops,

"f the .lubricant moves the piston 22S-with the stem 27' to' uncover the outlet passage' 30 (Fig. so that the lubricant may pass out of the pipe system 2 through the pipe'y 46, through Vthe chamber 26 and then through the pipe 47,-b`ack into thev crank case above l the level 'of' the lubricant therein to -relieve the pressure as shown in Fig. 1.

,The piston 28 is made slidable on the stem 27 to provide safety valve means which will operate to relieve the pressure at any time regardless of the relative position between v continued movement of the piston it engages' lthe stem andthe disk. That is to say, if

for any reason'thelubricant'in the system reaches a pressure which is rgreater than is required to press all. of the' pistons in the cups to the ends of the chambers' in the cups,

then thespring 31 will yield, and allow the piston to pass the passage 36fand relieve the Asystem of. its excess pressure?.

As the motor 5 stops, thefvarious parts of the system automatically assume their-normal positionsl so that they may be ready .for

with thecup shown in Figs. 2 and 3.

The cup shown in Fig. 7 includes a measuring chamber 48, inlet and outlet passagesv 49 and 50 apiston 51 and a valve 52 substantially as shown in Figs. 2 .and 3. In this instance, however, the valve seat 53 1s formed integral with the body of the cup between the chamber 48 and the outletpas sage 50. Instead `of the. piston .and valve stem being securedftogether as 1nA Flgs, 2 and 3, the piston 51.is here shown as slidable relative to the valve stem 54, and lstops 55. and 56 are carried by the stem 54 to limit the movement of Ythe'piston relative to the.

stem. A spring 57- is interposed between the piston 51 and the wall at the end of the chamber 48 normally to urge thefpiston the'enlarged portion of the chamber, and fa second spring V58 is laced in the outlet passage t0 press t e seat53.. n, In operation the! lubricantfirst fills the chamber 48, then moves the iston relative to the vstem 54 to cut o furt er passage ofv lubricantinto the' chamber" 48, then vupon the stop and thereafter moves the va ve `stem-54 to open the valve 52 against the pressure'of the spring 58'to permit the lubricant,

to flow from the chamber-48vthrou`gh the passage 50 tothe part to be lubricated.

be understood that changes involving omisvalve' 52 against its sion, substitution, alteration and reversal of parts and even changes in the mode of operation may be made without departing freni" -th'e scope of my invention, which is bestdelined in the 'followingielaims The oil cup for measuring valve perse,

`disclosed herein, is 'claimed in my copending dlvlsional application, Serial No. 333,226,

filed January 17, 1929.

Claims:

1. A central' lubricating system including a plurality of charge measuring and charge delivering lubricant cups, a Apower-driven piston pump connected to said cups by a pipe system, means for' starting the operation of said pump to force a definitely measured quantity of lubricant through theppe system to said cups and means associated with said .pump for stopping-thev operation of said pump after the piston in said pump has sufcient to chargesaid'cups.A

loperated a predetermined number of strokes 2. A central lubricating system including a plurality of charge measuring and charge delivering lubricant cups, a pump having a piston therein for forcing lubricant through a pipe systemto said cups, piston operating means and means for stopping the operation of said piston operating means upon completion offa given number 'of strokes of said piston, whereby a measured quantity of i .lubricant will be forced to said cups.

' 3. A central lubricating system` including piston therein for forcing. lubricant through a plurality of charge measuring and charge i delivering lubricant cups, a pump having af driven by said piston operating means for Y automatically stopping thepoperation of the piston immediately subsequent to the com.

redetermlned number of f 'pletion' of a l strokes ofthe piston, whereby a 'measured quantityof lubricant suicientcompletely to vcharge said cups will be forced 1nto` said pipe system and delivered to said cups.

4. A central lubricating systenr includingl a plurality of charge measuring andcharge delivering lubricant cups, a'pump having a piston therein for forcing lubricant" Athrough a'. pipe system to said cups,- electri.

cally driven means for reciprocating the pis. ton-in' said pump', and electric'circuit breaking means cooperating with said electrically4 driven means to stop the operation of said pump after a predetermined number of strokes ofthe piston,l whereby a measured quantity of lubricant suvicient to ,illall of said cups will be forced into said pipe system.- y

5. A vcentral lubricating 'system including a plurality of charge measuring and charge lVhile I have shown and 'described a preferred' embodiment of my invention, it. will delivering lubricant cups, a pump .having a piston therein for forcing lubricant through'- motor for driving means Vfor reciprocating i said piston, a'switch for making and breaking a circuit to start and stop ,said -motor, ratchetY and pawi means connected with said switch and operated by means driven by said motor to turn one oi the con- `tacts of said switch relative to the otherfto stop Said niotor'when a predetermined quantity of lubricant has been' forced fromsaid pump.

6. A central lubricating system includiiijg al plurality of charge measuring and charge `delivering lubricant ciips,"a pump-having a piston therein for forcing lubricant through a pipe system to said cups, an elecg tric motor for drivingmeaiis for reciprof eating said piston, a sw-itcli for making and breaking a circuit toistart-and stop said motor, lmanually operable means for operfbricant pressure inthe system when. said rotary part reaches a, predetermined point ating said switch to fcomplete a, circuitvfor starting said motor, ratchet and pawl means operated bysaid motor for breaking the circuit to stop said motor aftera predeterminedA 'v during its rotation.

8. In a central lubricatingsystem having a pump driven by a motor, an electric switch wie for starting andv stopping said motor, said `switch comprising an intermittentlyY driven i disk having an energized portion adapted to turn therewith, a'stationary Contact normally out of contact with said energized portion of said disk, a lug projecting from said disk, a hand-operated plunger for engageinent with said 111g to move said disk so as to bring said energized portion into contact with said stationary contact for starting the motor for operating said pump, intermittently operating means operated by said motor to continue the rotation of said disk until -the energized portionv is moved out of contact with said stationary `contact and a -lubricant pressed plunger located in a cylinder blockV adjacent 'said switch and having ajstein bearing against said disk to prevent said piston opening a port in said lcylinder block until said stem enters a detent in said disk thereby relieving the pressure in the system. L

9i Ina centrall lubricating system having a pumpdriven by a motor, an electic switch for starting 'and Stoppngsaid motor, said switch comprising an intermittently driven disk having an energized portion adapted toturn therewithfa stationary contact normally out of contact with'y said energized portion ofsaid disk, a lugprojcting from said disk, a'liiandroperated' plunger for engagement with saidxliig to move said disk -so as to bring said energized portion into contact vwith said "stationaryy Contact for starting the' motor forope'rating said pump,

intermittently operating means operated bysaid motor lto continue the 'rotation of said disk until the energized portion is moved out ofcontact AWith said stationary contact lubricant pressed plunger located in a cylinderblock` adjacent said switch and haviliigfa'vstem bearing against said disk tov prevent Asaid piston opening a port in said cylinder block until said stem enters a detent fin saiddisk thereby relieving the pressure thefsystem, said piston movable against the pressure of a spring to relieve the system of excess pressure 'even prior to -the entrance of said stem into said detent.

In testimony whereof I have signed my name to this specification.

HOWARD JMURPHY.

Images