US781891A - Lubricator. - Google Patents

Description

No. 781,891. I I PATENTED'FEB. 7, 1905 P. J. LOCKWOOD.

LUBRIUATOR'. APPLICATION FILED 001 1a, 1903.

Nira -S T A'rEs Patented February 7, 1905.

PATENT i s-ICE} LUBFHCATOR- SPECIFICATION forming part of Letters Patent- NO. 781,891, dated February 7, 1905.

Application filed October 14, 1903. Serial No. 177,053,

part to be lubricated by the action of a reciprocating piston; and my invention has for its object to insure a positive feed and prevent the straining and breaking and disabling of the apparatus which results in constructions heretofore used, and to this end 1 construct the apparatus as ,fully set forth hereinafter and as illustrated in the accompanying drawings, in which Figure 1 is a longitudinal section of an apparatus embodying my invention. Fig. 2 is a plan view; Fig. 3,9. detached view showing the ratchet and pawls.

Upon a suitable framework A is mounted a cylinder B, which in practice has a bore of very small diameter, to which is fitted a plunger or piston C, the cylinder-head being properly packed at the end through which the plunger passes, while at the opposite end there is provided a chamber 1, that communicates with an inlet-port 2 and an outlet-port 3 at a point beyond that reached by the plunger at the limit of its inward movement, a .screwplug 6 closing this chamber in line with the bore, so as to permit access to the chamber and bore for cleaning when necessary. The inlet-port 2 communicates with a'reservoir or other source of oil-supply E through a passage controllcd bya suitable valve 5, shown. as a check-valve, which opens readily when the plunger is drawn outward or is closed under pressure in the chamber 1, while the outlet-port 3 is in communication through a pipe 7 with the steam-supply pipe 8 of an engine or with any other'conduit or part to be oiled, a valve 4, shown as a oheck-'valve,seatmg against back pressure from the pipe 8, but

opening under pressure in the chamber 1. r

Suitable means are provided for imparting a positive outward movement to the plunger. As shown, a ratchet-wheel 9, turning in a hearing on the frame, carries a cam 10, having an abrupt shoulder, which cambears against a. roller projection 12, carried by the plunger C, I which is pressed inward under the action of a spring D,-that is connected at one end to a boss at'the end of the plunger and at the other end to a projection on the frame. so that when the shoulder of the cam .10 leaves the projec--' tion'12 the springwill throw the plunger iii-- ward. Any'suitable means is employed for imparting a step-by-step movement to the ratchet 9as, for instance, a pawl 13, connected to a crank-arm 14 of a crank-shaft 15, I another arm, 16, of which is connected to any.

suitable moving part ofthe machiile to be oiled. A spring-pawl. 17 below the ratchetwheel prevents any back movement of the same. By the above-described arrangement of parts the oil is drawn from the reservoir'E .70 into the chamber 1, the valve 5 lifting to per' mit its passage, and is then forced from the chamber 1, lifting the valve 4 intothe pipe 7 and to the part to be oiled. It will be seen that the outward movement of the plunger is slow and positive, aflordlng ample time for the oil to flow into the chamber 1 without the production of a vacuum, which would be apt to occur in feeding heavy oils if theoutward movement was instantaneous. This insures 8onormally the full supply of oil to the cylinderB at each outward movement of the-plunger. When the shoulder of the cam leaves the projection 12, the inward movementof the plunger is effected through the medium of the spring D, and the oil will be ejected as fast as it can flow-through theorifices under the action of. the spring.

It will be seen that there can be no'straining or pounding ofthe parts under either of the actions ofthe piston, such as is apt to oc; cur iii that class of apparatus where the inlet and outlet ports do not have constant communication with each. other through the medium of an intervening channel or chamber or where the outlet is closed by the plungerwhen inward, and that it is impossiblein the construction shown and in consequence nf-the presence of this continuous. communication of the chamber Land outlet-port for the 0 movement of the plunger to be resisted by a body of oil confined in a chamber having no 1 outlet, as occurs in prior constructions. It 1 will also be seen thatif the outlet-pipe? should be clogged or obstructed, as may sometimes occur, the plunger is still prevented from being positively forced against an incompressible bodyof oil, because the spring D in such case, which imparts the inward movement will yield to such pressure and the plunger will beheld from moving without straining or breaking any of the parts, and while the outward movement of the plunger is positive it will be seen that the only effect that can result in the case of the clogging of the sup ply-pipe would be the production of a partial vacuum in the chamber 1.

"While the chamber 1 should be in continuous communication with the cylinder, it should be of limited volume, the valves being arranged as close to the chamber as possible. This is because a large chamber would contain a body of air which might so expand or condense under the movements of the plunger as to fail to exert sufiicient force to lift the valves, (no oil flowing in such case,) especially in cold weather and with the heavy oil ,which' it is desirable to use.

It will be evident that the cam and spring struction and arrangement of parts shown, I

claim as my invention The combination with a'steam-pipe, and oilreceptacle of a lubricator having a cylinder, a packing-box at one end, a plunger extending through the said packing-box, inlet and outlet ports and valves, the inlet-port communicating with the oil-receptacle and the outletzport with the steam-pipe, a spring connected with the plunger to throw it inward, a cam and means for revolving it about the plunger, a bearing on the plunger maintained in contact with the cam bythe spring, and a ratchet-wheel and pawl for revolving.the cam,

substantially as set forth.

In testimony whereof I have signed my name to this 'seeilica-tion in the presence of two subscribing witnesses. v

PHILO J. LOGKVV O01).

Witnesses;

Gremlins E. Fos'rnn, J. A. FAIKFIELD.

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