US56186A - Improvement in governor stop-valves - Google Patents

Description

, UNITED STATES PATENT OFFICE.

JOHN ORAWLEY, OFA PERRYSVILLE, INDIANA.

IMPROVEMENT IN GOVERNOR ySTOP-VALVES.

Specification forming part of Letters Patent No. 56,186, dated July 10, 1866.

. provements in governorvvalves of that class which are available also as stop-valves; and

Y it consists in a novel construction of valve whereby it is balanced and not liable to get.

leaky and out of order by wear and long use; and it also consists in an improved method of operating` the same, as hereinafter set forth, reference being had to the accompanying drawing, forming part of this specification, in which- Figure lis a vertical section of my improved governor and stop-valve. Fig. 2 is a top view of the same. Figs. 3 and 4 are detail views.

Similar letters of reference in the different figures indicate corresponding parts.

The pipes A a are connected together by a globe, C C, Fig. l, the ends of the pipes being slightly separated by an opening, s s, as shown.

A valve, I, is attached to the stern p and slides vertically in the `pipe a. This valve I is open `through its center, as shown by i z' z' in top view, Fig. 4, of valve I, and by i, Fig. l, so that steam may passinto a in the rear of the valve I and give an equal pressure of steam above and below valve I. The valve I is substantia-lly a section of pipe which, by being depressed or elevated in the pipe a, elon gates or shortens the pipe a at its lower end, so as to enlarge or diminish the size of the aperture s s between the adjacent ends of the pipes a A.

To make the valve l quite tight when closed against A it is provided'with metallic packingrings j j, Fig. l, 'similar in construction to those used on engine-pistons, the said packing-ring being self-adjusting for taking up wear by means of springs o" r r, Fig. 4L.

The top of pipe a is covered with a plate or head, d, which has two uprights e .6, Fig. 3, and these uprights support a cross-head, F, in a fixed manner, and the cross-head is provided at its center with double cams or inclined planes, f f, upon its upper and lower sides.

The valve-stem p has a double cam or inclined plane H, hLIniXed thereto below the cross-head F, which engages with the inclined planes on the lower side of the cross-head,and the valve-stem p has also a double cam, K 7c k, Xed to it above the cross-head F, which engages with the cams or inclined planes f f upon the upper side of the cross-head F.

L, Figs. l and 2, is a lever which is itted on the upper end of the valve-stem p, and has a handle at L, and at its opposite end it connects with the governor-rod a, Fig.V 2, by a detachable connection, M, Figs. 1 and 2. This connection M is formed by a lever, m., which is pivoted to the governor-rod n at u, Fig. 2, so that the short end of lever m, in .connection with rod a, forms a pair of jaws for seizing the bolt o on the valve-stem lever L, the said jaws being held closed upon bolt u by a spring, t, and are disengaged from the bolt o by pressing the handle m in against n, so that the jaws M, Fig. 2, are thrown open. The bolt v is adjustable on the lever L, so that the throw of the valve I and governor-rod a may be changed with relation to each other, the bolt o sliding out and in on the lever L, and is secured in place by a set-screw.

Its operation is as follows: The fluctuations or oscillations of the governor-rod u give a rotary movement to the valvestemp by means of the lever L, and as the valve-stem is turned in one direction by an increase in the speed of the engine, then the cams h zf, Fig. 1, acting upon the lower Xed cams, press the valvestem p and valve I downward, so as to dimin-A ish the size of the delivering-aperture s s and when the governor-rod n is moved in the opposite direction bya slackening in the speed of the engine, then the upper valve-stem cams lc 7c act upon the fixed cams ff on4 the upper side of the cross-head F and elevate the valve I, so as to supply more steam to the engine, and thereby regulate the velpcity of the same.

This valve can be readily used as 'a stopvalve by throwing oft' the governor-rod a and turning the valve I down by means of the hand-lever L, Figs. l and 2.

It will be seen that the pressure ot' steam on the valve I is balanced on all sides, so that the' steam-pressure can at no time affect or obstruct the action or working of the valve.

By this means I obtain a verv sensitive and l durable governor-valve, and which is also 2. The valve-stem p, with cams 7L h k 7c, the

available as a stop-valve. xed earns f f, stop-lever L, and detachable Having thus described my invention, what governor-rod n, arranged and operating as and I claim as new, and desire to secure by Letters for che purpose set forth.

Patent, isv 1. The divided pipe A ce, globe U, and pipe JOHN GRAWLEY' B, tubular valve I j j, and stem p, arranged Witnesses:

and operating substantially as herein shown HUGH S. OOMINGORE,

and described. D. W. OOMINGORE.

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