USRE10728E - Lubricator - Google Patents

Description

J. POWELL.- LUBRIGATOR.

Reissued May 18', 1886.

FIG-.1.

PATENT OFFICE.

JAMES POWELL, OF CINCINNATI, OHIO.

LUBRICATOR.

SPECIFICATION forming part of Reiasued Letters Patent No. 10,728, dated May 18, 1886. Original No. 332,623, datcdDeccmber 15,1885. Application for reissue flied March 15, '1'z-86. Serial No. 195,356.

To all whom it may concern.

'hereby declare the following is a full, clear,

and exact description of the invention, that will enableothers skilled in the art to which it appertains to make and use the same, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon, which form a part of this specification.

The object of my present invention is to simplify the construction and thereby diminish the cost of manufacturing those devices which employa spring-actuated plunger for effecting a discharge of grease or other turgid lubricant from a suitable cup, fount, or reservoir.

The improved device is accordingly composed of but five members or partsto wit, the cup or fount, a screw-threaded hood or cover that engages therewith, a plunger or piston that ejects the grease, a spring that induces a regular-and automatic action of said plunger, and a cut-off or regulator that controls the discharge of the turgid lubricant. The cup is accurately bored out to receive the plunger, which latter is a plain disk snug-' ly fitted within thecup, but entirely devoid of packing. This unpacked pistonis operated by a spring coiled around a stem that passes through the hood or cover, the latter being preferably an external screw of the reservoir, although this arrangement may be exactly reversed, if desired; but whichever arrangement is adopted both screws may, in the cheaper grades, be cast at the time the fount and hood or cover are made, thereby dispensing with the tedious and expensive chasing or tapping operations heretofore employed for this purpose.

In the annexed drawings, Figure 1 is a sec-' tionized elevation of my improved lubricator,

'the hood or cover beingscrewed .down almost to the bottom of the reservoir, the piston being raised and the cut-oil closed. Fig. 2 is an axial section'of the device, the hood or cover being elevated, the stop-ring in contact therewith, and the cut-off open. Fig. 3 is an axial section of a modificationof the invention.

A represents the cylindrical fount, cup, or

threaded internally to engage with reservoir, having a screw-threaded shank, B,

provided with a discharge-passage, '0, above which latter is located the regulator or cutoff D,- pierced transversely at E, and terminating with nicked ends or heads F F, for the reception of ascrew-driver or other convenient implement. The fount is screw-threaded externally, as at G, to permit the engagement of the internal thread,H, of the hood or cover I, which cover has an annular flange or other enlargement, J, notched or fluted at K, to afford a secure and convenient hold in manipulating said hood or cover. Furthermore; the hood or cover is pierced centrally, as at L, to permit free play of the rod or stem M of the plunger or piston N ,.which latter is preferably a plain metallic disk,and is usually cast in one piece with its stem, said stem being made to project outwardly throughthe cover for the purpose of indicating the exact level of the contents of the cup. Applied around this stenuand interposed between the plunger N and cover, is a spring, 0, whose coils increase in diameter toward the top of the lubricator. Stem M is grooved circumferentially near its upper end, as at P, to receive a ring or collar, 1t,'that serves as a stop,as more fully described hereinafter. S represents an air-channel, bored in one end of the cutofi D to a short distance within theiutcrnal diameter of the cup A, then at right angles to port E of said cut-off. Said air-channel is made to co-. incide, with a small opening or hole, T, in the base of said cup, to' afford ventage to the same while withdrawing the piston preparatory to refilling the cup; but before this is done the cut-off is properly turned so as to bring the short branch of channel S diametrically opposite the openiug T, thereby preventing escape of. grease through the latter. Before charging this lubricator, the cutoff D is first turned so as to bring the nicks in the heads F F to the horizontal position seen in Fig. 1, which act causes the port E to assume a similar position, thereby closing said discharge-passage. The hood or cover I is then unscrewed withdrawrjr'from said vessel or reservoir, on account of "the ring R bearing against the upper end of said hood or cover. is now charged with grease or other turgid lubricant, and the hood is again engaged with from the fODEBii-A, and the plunger N readily The reservoir the fount, andas soon as the cut-off D is turned so as to'bring its port E in'line with the discharge-passage C, said grease begins to escape through said passage. This discharge of grease is due to the pressure of spring 0 against the ejecting-piston N, which spring causes the latter to descend gradually within the cup A; but as soon as the ring R comes in contact with the hood I, as seen in-Fig. 2, the action of said spring ceases, and thus gives no-' tice to the engineer that the lubricator is inoperative for the time being. The notched collar J K is then grasped, and the cover I is screwed dowuito impart a renewed'tension to the spring-.0, and thereby cause a restoration of the forcedfeed, these operations being re peated until the reservoir A is entirely exhausted. From this description it will be apparent that the action of the piston is controlled whollyby. the hood ,or'cover of the lubricator, thus dispensing with special adjust: ing devices, such as have heretofore-been customary. Consequently th'e'cost of manufacture is materially reduced, andas the threads G H in the cheaper grades of goods are cast when the fount A andhood I are made, the

cost is still further reduced, because said cast screws obviate the usual chasing or tapping of threads around and within these members of a lnbricator.

In the modification ,(seen in Fig. 3) the thread G of the reservoir A is internal,while the screw H of hood I'is external, thus exactly reversing the construction shown in the preceding illustration. Again, it will be noticed that the'plunger (seen. in Fig. 3) traverses the cover, not the reservoir;but the principle'of I operation is the same, inasmuch as the simple turning of said cover imparts the requisite tension to the spring that actuates the plunger, because the grease is forced upinto the cover, while the screw-threads, being fitted sufiicient- 1y close, prevents theescape or waste of grease around the same.

The stop-ring may, if preferred, be displaced by a simple pin driven or screwed transversely through the stem M.

I' claim as my invention 1. The combination, in a greasecup, of a fou nt or reservoir havinga discharge-passage,

fount or'reservoir havinga discharge-passage, aspring-actuated piston for effecting a forced feed of the turgid lubricant, a hood or cover which is screwed to said fount and imparts the tension to said spring, and a stem or rod projecting outwardlyfromsaid hood to indicate the exact level of the grease, as herein described.

3.-The combination in a grease-cup, of a fount or reservoir havingadischarge-passage,

a spring-actuated piston for efl'ecting a forced feed of the turgid lubricant, a hood or cover which is screwed to said fount and imparts the tension to said spring, to, the outer end of the piston-rod, for the purpose specified. i

4. The combination, in a grease-cup, of a fount or reservoir having a discharge-passage, a piston for effecting a delivery of the turgid lubricant, and a spring surrounding the rod of said piston and interposed between the latter and a hood or cover, said cover being screwed to said reservoir and serving to impart the tension to said coiled spring, substantially as herein described.

5. A grease-cup composed of .thefollowing I and a hood 1 and a stop applied.

6. The combination, in a-greasecup, of a fount or reservoirhaving a discharge-passage,

a spring-actuated piston for .efl'ecting a forced feed of the turgid lubricant, a cut-off for regnlatiug thedischarge of the same, and an airvent located within 'said cut offifor the purpose described.

In testimony whereof I aifix my signaturein presence of two witnesses.

JAMES POWELL.

\Vitnesses: I

JAMES H. LAYMAN,

SAML. S. CARPENTER.

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