US265747A

US265747A - Gborge w

Info

Publication number: US265747A
Authority: US
Publication date: 1882-10-10
Anticipated expiration: 1899-10-10

Description

I (No Model.)

- G. W. BRIGGS.

STOP MOTION FOR STEAM ENGINES.

No. 265,747. Patented"Oct- 10, 1882.

n. PETERS. wwmmw, minimum 0. c

UNITED STATES PATENT OFFICE.

GEORGE W. BRIGGS, OF DENVER, COLORADO.

STOP-MOTIQN F-OR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 265,747, dated October 10, 1882.

7 Application filed May 26,1882.

To all whom it may concern:

Be it known that I, GEORGE W. BRIGGS, a citizen of the United States of America, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Stop-Motions for Steam-Engines, 850., of which the following is a specification, reference being bad therein to the accompanying drawings.

Although adapted for use in other connections, as will be hereinafter explained, this invention relates more particularly to the stopmotion mechanism of the valve-gear ot'steanlengines.

It consists in interposing a sleeve between a continuously-reciprocating rod and the device to be reciprocated thereby,in which sleeve the rod may either reciprocate or to which it may be locked at the proper point by a locking-cam mounted on the sleeve and adapted to engage a recess in the rod.

In order that my invention may be clearly understood, 1- have illustrated in the annexed drawings and will proceed to describe the best form thereof at present known to me as applied to the valve-gear of a steam-engine, and also its application to a pump-rod.

Figure 1 is a side elevation of so much of a horizontal reciprocating engine as will clearly illustrate my improved stop-motion. Fig. 2 is a sectionized side elevation of the stop-motion detached. Fig. 3 is a plan view of such detached stop-motion. Fig. 4 illustrates the end of the eccentric-rod. Fig. 5 illustrates the application of my invention to a pumprod.

The same letters of reference indicate identical parts in all the figures.

- The use of my invention as a stop-motion I- have illustrated in the annexed drawings in connection with a steam-engine in which the valve-stem A is operated by the arm 0 of a rock-shaft, I), through a connecting-rod, B, the rock'shat't D being provided with an arm, E, with which the eccentric-rod G can be connected by means of the sleeve or socket F. The sleeve is constructed with a shank, which is strapped to the stud-pin of arm E, as clearly shown, so that the sleeve may turn on said arm, as required. The end of the eccentricrod is snugly fitted in the bore of the sleeve, and is adapted to freely slide therein, except when it is locked thereto by a locking device, which in this instance consists of an eccen- (No model.)

tric or cam, H, pivoted to the sleeve opposite to a hole, fitherein, through which hole the cam can be made to enter to engage a notch or depression, g, in the eccentric-rod. The notch g conforms to the curve of the cam, so that the eccentric-rod will always be locked at the.proper point to the sleeve, and consequently operate the valve with proper reference to the motion of the piston. The locking-cam H is provided with a handle, h, for operating it, and a spring-hook, I, may be fastened to the sleeve, adapted to lock handle it when the cam is in engagement with the eccentric-rod.

In applying my invention to a pump-rod I divide such rod at the proper point and rigidly secure to or form on one section thereof a socket, K, in the bore of which the adjacent end of the other section, L, of the pump-rod is fitted, so that it may slide freely therein, being notched like the eccentric-rod G, and the socket K being provided with a lockingcam for locking section L of the pump-rod to the socket K of the other section, all as shown in Fig. 5.

I prefer to use a cam for locking a notched reciprocating rod to the sleeve or socket; but it is obvious that other well-known means may be employed to detachably look a reciprocating rod to such sleeve or socket at a determinate point without essentially changing the combination. Again, the device for transmitting the motion of the reciprocating rod need not necessarily be a sleeve or socket, although Ipret'er that. This socket and cam can be used as a substitute for the ordinary drop o GEORGE W. BRIGGS. Witnesses: CHARLES S. WILsoN, J AMES DILTS.