US1257076A - Check-valve for locomotive-boilers. - Google Patents

Description

J. B. GALLAGHER. CHECK VALVE FOR LOCOMOTIVE BOILERS. APPLICATION FILED MAY 9. 19m.

1,257,076. Patented Feb. 19,1918.

am new JOHN B. GALLAGHER, or BUTTE, MONTANA.

CHECK-VALVE FOB LOCOMOTIVE-IBOILERS.

Application filed May 9, 1916.

To aZZ whom it may concern:

Be it known that LJOHN B. GALLAGHER, a

citizen of the United States, residing at Butte, in the county of Silverbow and State .Of llllontana, have invented a certain new and useful Check-Valve for Locomotive- Boilers, of which the following is a specification.

This invention relates, generally, to check valves for steam boilers and particularly to means for operating said valves to enable the cleaning of the valve seats from foreign substances; to release said valves when under pressure in the event that they become jammed; and to grind. the same in the event of leakage without dismantling the valve and without blowing out the boiler, and it has for its object to provide a simple, durable, and comparatively inexpensive boiler check valve, and it consists in the parts and combinations of parts hereinafter described and claimed.

In the accompanying drawings, forming a part .of this specification,

Figure 1 is a central vertical section of a check valve showing my invention in place.

Fig. 2 is a similar section taken on line at right angles to the view shown in Fig. 1.

Fig. 3 is a section on the line 33 of Fig. 1.

Similar letters refer to similar parts in all the views.

Referring to the drawings, A represents a valve casing having a central opening B formed with screw-threads to receive the threaded cap C toclose the same. At the bottom end of the opening B an internal shoulder a is formed to provide a seat or support for the disk D, said disk D having a ground joint with the shoulder to prevent leakage. To the center of the underside of I the disk D a guide pocket E is formed which extends downwardly in order to receive the stem F of the valve G and guide the same in its vertical. movement. The check valve G comprises the annular flange or head C to rest on the valve seat 6 and the downwardly extending guides d by which it is guided in its movement. H is the branch inlet pipe from the injector and K the outlet pipe from the valve casing to the boiler. The pipe K is provided with a collar or flange L, through which the valve casing is bolted to the boiler the contacting faces being ground so as to prevent leakage.

The valve casing A is provided with a Specification of Letters Patent.

Serial no. 96,379.

downward extension L having a smooth bored opening into the'ca'sing and an exterior threaded opening into which the end of the tubular casing M provided with a smooth longitudinal bore, is screwed and through which casing a rod O extends and into the valve casing.

The head or forked end of rod 0 rests normally below the valve G and when the valve becomes clogged or dirty it may be cleaned by raising the rod, the forked end of the latter engaging the guides (Z and the valve is lifted from its seat permitting the flow .of water from the boiler to wash off the valve seat. In the eventof a leakage the valve may be turned or rotated on its seat and, under boiler pressure, may readily be turned or rotated by the rod and ground on the seat, thus stopping the leak. T he upper forked end P of the rod rests, when not in use, out of the way of the valve. At its other end the rod 0 carries a crank handle it, whereby it may be moved upwardly, and, when necessary turned or rotated. The lower end of the tubular casing, M, screws into the stuiiing box P. The stuffing box R comprises the nut 71, within which a follower m is seated.

Having thus described my invention, what I claim is:

1. A check valve for boiler feeds, comprising a casing having a central opening, a cap for removably closing the opening, an extension projecting through the opening and having a guide pockettherein, a valve carrying a guiding stem normally in engagement with said pocket, an extension on said casing having a smooth bore entering into said casing, a rod having a forked end arranged. in said casing and extending through the bore in said extension ,a stutling box on said extension through which the rod passes, said rod adapted to slide in said bore to cause the forked end thereof to engage the valve to lift it from its seat, and means to rotate the rod when in engagement with the valve to grind the valve.

2. A check valve, comprising a spherical hollow body having a threaded opening in the top thereof, an annular shoulder within the body forming a valve seat, tubular projections, one communicating with the interior of the body on one side of the valve seat and the other on the opposite side of said valve seat, a cap for removably closing said opening, an extension projecting down- Patented Feb. is. 191

7 extended through Copies oftliis potent may be obtained: for

. iwardly through the guide pocket therein,

fible with the guide fins opening and having a j a valve for said valve. seat andhaving a guiding stem thereon extending upwardly into saidg uide' pocket and having guide fins extending downwardly therefrom and engaging thewall of the an-' nular shoulder, a rod-shdably and 'rotatably the bottom Wall of the forked inner end engageofthevaive, a stuifing-box carried. by the vbody about said rod,

body andhavlng a five Cents each, by Washington, D. C.

and a handle on the outer end of the rod, the forkedend of the'rod being adapted to be moved into and out of operative engagement with V thefins of the In testimony whereof; lrafiix rnywsi'gna ture in the presence oftwo Witnesses. JOHN B; GALLAGHER.

Witnesses: 1 I V EDWARD NEWMAN,

' PooL.

addressinfthe Commissioner of Patents. 1

Valve by thesliding 15 v movement of therod. r r s

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