US1172540A - Lubricator. - Google Patents

Description

1. F. MCCANNA.

LUBRIGATOR.

APPucATmN F1LFD FFB.1,1906. RENFwFD 1uLY a, 1915.

2 SHEETS-SH EET l.

Patented Feb. 22,1916.

Klyne/956,5@

M76 ffy 'r ccLUMnlA-PLANouRAPH co., WASHINGTON D c &\\\\\\\\\\\\\\\\\\\\\\\\\\\ 1. F. MCCANNAl Mum PLANOGRAPH co. WASH NGT N D C Unire-p srnrns PATENT enrico.

JOHN 1E'. MCCANNA, '0F CHICAGO, ILLINOIS, ASSIGNOR TO MoCORD'a COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION F NEW JERSEY.

LUBRroAToR.

Specification. of Letters Patent.

Patented Feb. 22, 1916.

Application led February 7, 1906, Serial No. 299,939. Renewed July B, 1915. Serial No. 38,782.

To all 'whom it may concern.' l

Be it known that I, ,lor-IN F. MCCANNA, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois.` have invented certain new and useful Improvements in Lubricators, of which the following is a specification, reference being had therein to the accompanying drawings.

rlhis invention relates to improvements in torce Jfeed lubricators, and has particular reference to lubricators of that type in which a pair orI cooperating pumps is employed for delivering the lubricant from the reservoir to the part being lubricated.

The invention consists of the organiza tions and arrangements of parts hereinafter particularly described and then pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a vertical longitudinal sectionalv -view of the reservoir showing two sets of coperating pumps, parts being shown in section for convenience of illustration: Fig. 2 isa vertical sectionalview on the line 2 2 of Fig. 1: Fig. 3 is a similar view on the line 3-3 of Fig. 1, illustrating the valve operating connection; F ig. 4 is a view in elevation showing a modified form of sight feed device; Fig. 5 is a sectional view on the line 5 5 oi' Fig. 4; and Fig. 6 relates to a detail of said modification. 'l y In the accompanying drawings, the numeral designates the lubricant reservoir which may be of any suitable size and shape, it being sho-wn in the present instance as rectangular. The reservoir 10 is provided with a cover 11 having a depending flange 12 which fits within the reservoir. The reservoir 10 has securedv thereto at the ends upwardly extending threaded studs 13 which pass through suitable openings in the cover 11 and receive nuts 14 to secure the reservoir to the cover.

IVithin the reservoir and depending from the cover 11 are one or more tandem sets or pairs of cooperating pumps. In the present instance, as shown in Fig. 2, the pump bodies of each set of pumps are made from an integral casting, although this is not material. The barrel 15 of one of the pumps, herein designated the primary pump, is provided at its lower end with a commoninlet and outlet port 16 which communicates with a horizontal boreV 17 formed in the body casting'. An inlet tube 18 having a passage 18 extends to adjacent the bottom of the reservoir so as to enable the primary pump to practically exhaust the contents of the reservoir, and the passage therein also enters the bore 17 below the port 16. A. vertical tube 19 forming an auxiliary reservoir or stand pipe, lscrews into a suitable threaded socket in the casting and communicates-with the bore 17 above the vport 16. The upper end of the tube 19 is closed and screw threaded and extends through a suitable aperture in the cover. A nut 20 screwed upon the threaded end of the tube and ccperating with a shoulder on the tube clamps the same to the cover. has'an air port 21 and the cover 11 is also provided withl an opening 22 to admit air to the reservoir. A duct 23 leads'from the standpipe to the bore 17. The barrel 24: ofthe auxiliary or delivery pump has a common inlet and outlet port 25 at its lower end and below. the outlet of the duct 23, while apassage 26 passes through the casting and extends upwardly through an extension 27 of the latter. The extension 27 is shouldered near its upper end to abut against the cover 11 and beyond the shoulder is screw threaded and passes through an opening in the cover, receiving a suitable nut 28 by means of which the extension is clamped to the cover.

In the present embodiment of the invention the plungers 29 andl 30 of the primary andv auxiliary pumps, respectively, are caused to reciprocate simultaneously in the same direction.- To .this end a cross head 31 is fixed to the upper end of the plunger and is provided with an opening through which extends an extension 32 of the plunger 29. This extension is provided with abutments 33 and 341 with which the cross head cooperates 'to reciprocate the plunger.

lThis tube i Such cross head is also provided with a suitable opening for the tube19 which provides a guide for the cross head.

The cross head is bifurcated as shown and within such bifurcation rotates an eccentric 35 to reciprocate the cross head. This eccentric is carried by a shaft 36, the ends of which are journaled in depending hangers 37 which are fixed to the cover 11, one at each end thereof. A worm gear 38 on the eccentric shaft receives motion from a worm 39 which is housed within an enlargement O on the cover and the shaft of which passes through and is ournaled on a vertical plate L11 formed on the cover. This plate, when the lubricator is used on an automobile, provides a convenient means for securing the lubricator to the dash. The end of the worm shaft extends outside of the reservoir and is designed to receive motion from any suitable source of power.

en oscillating valve 42 is seated in the bore 17 and is tapered as shown, the bore being correspondingly tapered to insure a snug fit. A suitable shaft 43 passes through a longitudinal opening in the valve, and has each end journaled in the lower end of the adjacent hanger 3T, as shown in Fig. 1. The valve is provided at its reduced end with a threaded extension which receives a nut 414. A coiled expansion spring f5 surrounds the threaded extension and reacts against the nut to hold the valve pressed to its seat.

The valve is provided with a pair of diametrically opposite grooves or channels 16 and 47. The channel 416 is always in communication with the port 16 and is designed to place such port in communication with the inlet tube 18 and the stand pipe 19 in alternation. The channel 17 is likewise continually in communication with the port 25 of the auxiliary pump and is adapted to place such port in communication with the duct 23 and the passage 26 in alternation, the arrangement being such that when the port 16 is in communication with the stand pipe 19, which occurs on the down or discharge stroke of the pump plunger, the port 25 is in communication with the passage 26, and on the other hand, during the upstroke of the plunger the port 16 is in communication with 'the inlet 18 and the duct 23 is in communication with the port 25. The foregoing description of the pumps and valve applies to each set of pumps and where more than one set of pumps are employed, the valve 42 for each set is carried by the same shaft, such shaft being extended the required distance for this purpose, as shown in Fig. 1. The shaft 43 has fixed thereto a crank arm 48 provided with a crank pin 49, while the shaft 36 is provided with an eccentric 50 offset diametrically opposite to the eccentric 35. The sleeve 51 which cooperates with the eccentric 50 is provided with an arm 52A having at its lower end an elongated slot 53 which receives the crank pin 49.

The capacity of the stand pipe is greater than the maximum delivery of the primary pump, while the capacity of the auxiliary pump is greater than thatof the primary pump, this being due in the present instance to the greater cross-sectional area of the auxiliary pump. In order to vary this difference in the relative capacities of the pumps and consequently the rate of delivery of the lubricator, l preferably provide means for varying the stroke of the primary pump. To this end the upper end ofk the extension 32 is screw threaded and the abutment 3l is in the form of an internally threaded sleeve screwing upon the threaded end of the extension 32 and passing freely through the cover. The upper end of the. sleeve 311 is provided with a suitable head by means of which it may be turned to adjust the same either to eliminate or provide lost motion between the plunger and the cross head. A set bolt screwing into the sleeve serves to lock the adjustable abutment in its adjusted position. The difference in the capacities of the pumps is compensated for by the admission of a supply of air into the stand pipe 19 through theair port 21 at each operation of the auxiliary pump, this supply of' air being equivalent to the ydifference between the capacity of such pump and the quantity of oil in the stand pipe.

In the operation of the lubricator, a reciprocatory motion is imparted to the cross head 31 by the eccentric 35. Upon the upstroke of the plungers, the valve channels 46 and t? then being in the positions indi cated by the dotted lines in Fig. 2, oil is sucked in through the inlet 1S into the barrel of the primary pump, and assuming that the lubricator has been previously operated and that the stand pipe contains a supply of oil, this oil is drawn from such stand pipe on the suction stroke of the auxiliary pump through the duct 23 into the barrel of such pump, and is followed by a supply of air corresponding to the difference in capacity of the pumps. During this upward movement of the cross head', owing to the elongation of the slot 53 the arm 52 simply rises without turning the valve. Upon the completion of the suction or up stroke of the plungers and while the eccentric 35 is passing the center the end of the slot reaches the crank pin and turns the same far enough to cut off the inlet 18 and duct 23 and. throw the port 16 into communication with the stand pipe 19 and the portI 25 into communication with the passage 26. The cross head then begins its reverse movement, moving the plungers downwardly and during this operation the oil previously drawn into the barrel 15 is forced into the stand pipe while the oil in the barrel 24 is discharged therefrom and forced to the bearing. The discharge stroke having been completed and while the eccentric is again passing the center the valve is shifted.` to its former position and the cycle of operations is continued.

By reason of the construction and operation described, and owing to the difference in the capacities of the pumps and the admission of air to the delivery pump, the charges of oil delivered by the auxiliary pump are in the form of drops or globules separated from each other by air spaces, as indicated in Fig. i, and this is utilized to determine the rate of delivery of oil to the bearing being lubricated.

ris shown in Figs. 1 and 2, a suitable glass tube 55, shown as curved in the present instance, is connected by a suitable packing gland 56 to the upper end of each discharge extension 27. The upper end of the tube leads through the plate 4:1 and is connected by a suitable packing gland 57 with the conduit 58 which leads to the bearing being lubricated. lt is obvious from the foregoing that it may be readily determined at what rate the lubricator is delivering oil by noting the size and frequency of the drops of oil passing through the sight feed glass associated with each set of pumps.

ln the arrangement heretofore described, each set of coperating pumps is provided with an individual sight feed glass. rilhis provides a simple arrangement, and where the lubricator is used with an automobile and has the cover plate 4:1 located on the dash in front of the seat of the chauffeur, the sight feed devices are readily observable. Another form of sight feed device is illustrated in Figs. 4 and 5 wherein I employ a single sight feed glass for all of the sets of ceperating pumps, means being provided for connecting the sight feed glass at will with any particular set of pumps when it is desired to ascertain the rate of delivery of such set. In Fig. 1 the lubricator is shown as provided with two sets of pumps, and the sight feed device shown in Fig. i is accordingly arranged for two sets.

Referring to Figs. 4 and 5, the numeral 59 indicates a vertical base plate having a suitable grcove in which is located an inverted U-shapedrglass tube 60 the ends of which extend into suitable cavities formed in enlargements 61 at the bottom of the base plate. A plug 62 screws into each cavity to clamp a sealing ring 63 about the tube to prevent leakage, and a cap nut 64e vis adapted to the plug, as' shown in F ig.

however, is provided at diametrically op.

posite points with a pair of longitudinal channels l69 and 70 which when the valve is in the position shown in Fig. 5 communicate at the lower ends, respectively, with the passages 67 and 68, while the upper end of the channel 69 communicates with a passage 71 passing through the base 59 to the inlet end of the tube 60, the upper end'of the channel 'i0 then communicatingwbya passage 72 with the discharge end of the sight feed tube. The arrangement ofL each valve 65 is ythe same except that the passage 73 communicating with the upper end of the channel 69 ofl the upper valve enters the passage 71 and the passage 74 leading from the upper lend of the channel communicates with the passage 72. vBy reason of this arrangement the full length of the sight feed tube is utilized for each set of pumps for determining the rate ofdelivery. In the event that it is desired` to test the rate of delivery of any set of pumps, the

valve 65 associated therewith is turned so as to cut off the direct feed through the port 66 and placethe channels 69 and 70 into communication with the passages 67 and 68. The eil then passesthrough the sight tube.

By reason of the arrangement shown and described, a single valve is employed for each set ory pair of ceperating pumps and this valve is operated mechanically, thus dispensing with a plurality of gravity or spring seated valves, such as are usually.

employed. When more than one set of cooperating pumps are employed the valves cfall of the same are operated simultaneously and by a common operating mechanism. l y y v Inasmuch as all of the pumps and the operating mechanism therefor are entirely supported by the stationary cover. and are independent of the reservoir, the latter may be readily detached from the cover when it is vdesired to attain access to the mechanism or to refill the reservoir although a filling hole is preferably provided in the cover for the latter purpose. This is done Without disassembling the pumps or operating mechanism, and Without disconnecting the conduits or oil tubes.

The adjusting device as it extends outside the reservoir enables the rate of delivery to be varied Without opening the reservoir, and as such device is reciprocated by the cross head its reciprocation serves to indicate the rate of movement and the length of the stroke of the pump.

Having described my invention What I claim is,-

l. In a lubricator, a 4pair of cooperating pumps each having an inlet-outlet port, and a mechanically operated valve common to both ports.

2. In a lubricator, a main reservoir, a pair of pumps, an auxiliary reservoir, and a valve common to both pumps and Which when in one position connects one of the pumps with the main reservoir and the other With the auxiliary reservoir and in its other position connects the former pump with the auxiliary reservoir and the latter With its discharge passage.

3. In a lubricator, a main reservoir, a primary pump to Which lubricant is supplied from a main reservoir, a delivery pump, an auxiliary reservoir, and a valve for placing the pumps in communication With the auxiliary reservoir in alternation.

'l. In a lubricator, a reservoir, a primary pump, a delivery pump, and a valve which in one position places the primary pump in communication with the reservoir and the delivery pump in communication With its auxiliary reservoir and in its other position conducts to the delivery pump the lubricant discharged by the primary pump.

In a force feed lubricator, a pair of reciprocating pumps, an auxiliary reservoir to Which the lubricant is delivered by one pump and from which it is drawn by the other pump, and a. valve common to both pumps for placing such. auxiliary reservoir in communication With the pumps in alternation.

6. In a lubricator` a reservoir, a primary pump, a delivery pump of greater capacity than the primary pump, an auxiliary reser voir, a valve which in one position places the primary pump in communication with the reservoir and the delivery pump in communication with the auxiliary reservoir and in its other position conducts to the auxiliary reservoir the lubricant discharged by the primary pump, means for varying the rate of delivery of rthe primary pump, and provision for supplying air to the delivery pump and to compensate for the difference in capacities of the pumps.

7. In a force feed lubricator, a pair of reciprocating pumps of different capacities, a stand pipe having an air inlet and to Which the lubricant is delivered by the pump of lesser capacity and from which it is drawn by the other pump, and a mechanically operated valve for placing the stand pipe in communication with the pumps in alternation.

8. In a lubricator, a pair of reciprocating pumps of different capacities, an auxiliary reservoir having an air inlet and to which the lubricant is delivered by the pump of lesser capacity and from which it is draivn by the other pump, a valve for placing the auxiliary reservoir in communication With the pumps in alternation, and means for varying the stroke of the pump oflesser capacity.

9. In a force feed lubricator, a pair of reciprocating pumps of different capacities, a stand pipe having an air inlet and to which the lubricant is delivered by the pump of lesser capacity and from which it is drawn by the other pump.l and a mechanically operated valve for placing the stand pipe in communication with the pumps in alternation, such valve also controlling the inlet and discharge of the lesser and greater pumps, respectively.

10. In a force feed lubricator, a pair of reciprocating pumps of diderent capacities, means for varying the stroke of the pump of lesser capacity, a stand pipe having an air inlet, an oscillating valve common to both pumps and for placing the stand pipe in communication with the pump of lesser capacity on its discharge stroke and in communication with the other pump on its suction stroke.

l1. In a force feed lubricator, a pair of reciprocating pumps of different capacities, means for varying the stroke of the pump of lesser capacity, a stand pipe having an air inlet, an oscillating valve common to both pumps and for placing the stand pipe in communication with the pump of lesser capacity on its discharge stroke and in com-k munication With the other pump on its suction stroke, means for reciprocating the pump plungers, and a connection between such means and the valve for oscillating the latter.

12. In a force feed lubricator, a pair of reciprocating pumps of different capacities, an eccentric operated cross head fixed to the plunger of the pump of greater capacity, means for creating or eliminating lost motion between the cross head and the plunger of the other pump, a stand pipe having an air inlet and to which the lubricant is delivered by the pump of lesser capacity and from which it is drawn by the other pump,

an oscillating valve controlling the communication between the stand pipe and the pumps, and an eccentric for operating the valve between the reciprocations of the plungers.

13. In a force feed lubricator, the combination with a reservoir, of a pair of reciprocating pumps of different capacities located therein, a stand pipe, a shaft having an eccentric, a cross head fined to the plunger of the pump of greater capacity and actuated by the eccentric, the plunger of the other pump having a pair of abutments with which the cross head cooperates, one of suoli abutments being adjustable to vary the stroke of such pump, an oscillating valve common to both pumps and controlling the intake and discharge thereof, a shaft for suoli valve, a crank arm on the shaft and an arm operated by the eccentric shaft and having a slot engaging the crank arm and providing lost motion between the parts, whereby when the valve is in one position the pump of lesser capacity is in communication with the reservoir and the other pump is placed in communication with the stand pipe and when in its other position the first pump is in communication with the stand pipe and the other pump is in communication with its discharge conduit.

14. In a lubricator, the combination with a reservoir, a pair of reciprocating pumps of different capacities, and a stand pipe, of a valve which in one position places the pump of lesser capacity in communication with the reservoir and the other pump in communication with the stand pipe and in its other position places the stand pipe in communication with the i'irst pump and the other pump in communication with the discharge conduit of such pump, and means for oscillating the valve.

15. In a device of the class described, a reservoir, a cover-plate to which the reservoir is detachably secured and having a depending hanger at each end, a pump located in the reservoir and secured to the cover, a cross head fixed to the pump plunger, a shaft journaled in the hangers and having an eccentric for reciprocating the cross head, a pump valve, connection between the shaft and the valve for operating the latter, a worm wheel on the shaft, and a worm journaled on the cover and engaging the worm wheel.

16. In a lubricator, a pump, a connection between the pump and the part being lubricated, a sight feed device, and a valve hav` ing a port which when the valve is in one position registers with the connection, and a pair of opposite channels which when the valve is in another position are put in communication with the connection and the ends of the sight-feed device at opposite sides of the valve to pass the lubricant through the said sight feed device.

17. In a lubricator, a pump, a connection leading from the pump to the part to be lubricated, a sight feed device consisting of a substantially U-shaped transparent tube, and a valve between the ends of the tube and having a diametrical port and a pair of opposite channels, whereby when the valve is in one position the port registers with the connection and when in another position the connection at opposite sides of the valve is placed in communication with the ends of the tube.

18. In a lubricator, a pump, a connection leading from the pump to the part being lubricated, a valve having a port which normally registers with the connection, and a by-pass consisting of a transparent tube, the said valve having opposite passages which when the valve is moved from its normal to a predetermined position places the connection at opposite sides of the valve in communication with the ends of the tube.

19. In a lubricator, a pair of coperating pumps of different capacities, the pump of greater capacity being the delivery pump, with provision for supplying a charge of air to the delivery pump to compensate for the difference in capacity and to separate the charges of oil delivered to the bearing, and a-transparent tube through which such air separated charges pass to the part being lubricated.

20. In a lubricator, a delivery pump with provision for supplying a charge of air to the pump to separate the globules discharged by the latter, a sight feed device, and a valve which in one position delivers the oil direct to the part being lubricated and in another position passes the oil and air globules through the sight feed device.

:21. In a lubricator, a delivery pump with provision for supplying a charge of air to the pump to separate the globules discharged by the latter, a sight feed device, and a valve having a port through which the oil normally passes to the part being lubricated, and a transparent tube, the said valve having channels which when such valve is in a predetermined position conducts the oil and air globules to and from the transparent tube.

22. In a lubricator, the combination with a plurality of sets of primary and delivery pumps, each delivery pump being of greater capacity than its associated pump, and provision to supply a charge of air to the delivery pump at each operation to compensate for the difference in capacity of the pumps and to separate the globules discharged by the delivery pump, a valve for each set of pumps and having a port through which the oil normally passes to the part being' lubricated, a transparent tube, the vulve of each set of pumps having diametrically disposed channels adapted when the valve is moved out of its normal position to place the conduit leading` to the valve into communication With the inlet end of the transparent tube and the Conduit from the vulve into communication With the outlet end of the tube.

In a force-feed lubrieator, in combination, two pumps comprising cooperating cylinders, one of said cylinders having an inlet and the other cylinder having an eutiet; a receptacle intermediate Said cylinders and communicating therewith; and a single valve member in said receptacle adapted properly7 to Connect seid cylinders with sind receptacle, the first mentioned cylinder with its inlet and the second mentioned cylinder With its outlet.

In testimony whereof I affix my signature in presence of two Witnesses.

JGHN F. MCCANNA. W'itnesses ELIZABETH MoLrTon. ARTHUR B. SniOLD.

Copies of this patent may be obtained for five cents each.l by addressing the Commissioner of Patents, Washington, D. C.

Images