US674606A - Gas-valve. - Google Patents

Description

UNITED STATES FFTCEQ CHARLES E. FORSYTH, OF AKRON, OHIO, ASSIGNOR OF TlVO-THIRDS TO MARK GAIR AND PHILP F. HAAS, OF SAMEPLAOE.

GAS-VALV E.

SPECIFICATION forming part of Letters Patent No. 674,606, dated May 21, 1901.

Application filed February 25, 1901- $erial No. 48,812. (No model.)

To aZZ whom, it may concern.-

Be it known that I, CHARLES E. FoRsYTH, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Gas-Valves, of which the following is a specification.

My invention has relation to improvements in that class of valves adapted to be used in connection with inflammable gas for lighting or heating purposes, to close the admission of gas upon the absence or great decrease of the gas-pressure sufficient to extinguish the lighted burners, and to prevent the reentrance of gas upon an increase or return of such pressure.

The object of my invention is to produce a new and improved valve that will be simple in construction, effective in operation, readilyinterposed in the service-pipe, occupying a small space, and with a minimum of working parts.

To the accomplishment of the foregoing object my invention consists in the peculiar and novel construction, arrangement, and combination of parts hereinafter described and then specifically pointed out in the claims,reference being had to the accompanying drawing, which forms a part of this specification.

In the accompanying drawing, which represents a vertical central section of my device, l is a hollow cylinder closed at the bottom and open at the top, having near the bottom oppositely disposed internally screwthreaded horizontal sockets 2 3, into which are screwed adjacent ends of the servicepipes 4 5. Within the cylinder 1 is a cupshaped valve 6, with the open end upward and beveled near the top from within to a practically sharp edge and having on the bottom a lug 7. This valve is adapted to slide vertically in the cylinder and is made What may be called a free working fit,sufficiently loose to permit a slight escape of gas around it. The top of the cylinder is externally screw-threaded and is closed with a screwcap 8, between which and the cylinder 1 is a packing-ring 9, which extends sufiiciently toward the center to be encountered by the sharp upper edge of the valve 6. Integral with the cap 8 is a vertical hollow post internally connected through the cap by a smaller opening, in which freely slides a valve-stem 10, having on its lower end a valve 11 to bear against the under face of the cap 8 and at its upper end a push-button 12, constantly -pressed upward by a coiled spring 13, ar-

ranged to bear against an annular shoulder at the bottom of the hollow post, and thus normally prevent the escape of air from the case 1.

In operation the valve 6 Will primarily rest at its lowest position until gas under pressure isintroduced into one of the pipes 4 5. As the machine is adapted to Work in either direction, either pipe may be used as the induction and the opposite as the eduction pipe. Assuming that the pipe 4 is the induction and gas under pressure is introduced into it, the first effect will be to push the valve 6 in the opposite direction the slight almost infinitesimal distance to press against the opposite wall of the cylinder 1, and thusclose the opening to the socket 3 and effectually close it against the passage of gas. To open this valve, the button 12 is pressed, thus opening the valve 11 and permitting the air above the valve 6 to escape, when the gas-pressure, acting under the valve 6, will raise it to the position indicated by the dotted lines and open communication between the sockets 2 3 and permit the gas to pass. As soon as the valve 11 is closed air cannot enter above the valve 6, and hence a partial vacuum will be formed to prevent its descent, which, coupled with the gas-pressure beneath it, will continue it suspended until there is a decided decrease or absolute lack of the gas-pressure,when the weight of the valve 6 Will overcome the partial vacuum and allow the valve 6 to slowly settle to the bottom of the cylinder, and thus again close the communication between the sockets 2 and 3.

Having thus described my invention and the nature of its operation, what I claim, and desire to protect by Letters Patent, is

1. An improved gas cut-0d of the kind designated consisting of a cylindrical cup-shaped cell with a detachable cap and oppositely-disposed openings adjacent to the bottom thereof adapted to be connected with adjacent ends of the service and house pipes, and a cup-shaped valve, less in height than said cell, adapted to freely slide therein and permit a slight escape of gas around it with its open end upward, substantially as shown and described.

2. An improved gas cut-off, embodying a closed cylinder having openings near the bottom, to be connected with inlet and outlet pipes respectively, and a cup-shaped valve adapted to slide vertically therein, adapted to permit a slight escape of gas around it and having means for arresting its descent slightly above the bottom of the cylinder, substantially as shown and described.

3. An improved gas-check consisting of a cylinder closed at the bottom, with inlet and outlet pipes,connected near the bottom therewith, and having a detachable cover, and a cup-shaped valve arranged to fit and slide in said cylinder with the open end upward sufficiently free to permit a slight escape of gas around it, and means substantially as described for permitting the escape of air through said cover,substanti ally as described.

4. An improved gas-check consisting of cylinder closed at the bottom, with inlet and outlet pipes near its bottom, a cover provided with an outlet-valve to permit the air to es cape at will, a cup-shaped valve fitted with the open end upward to slide in said cylinder sufficiently free to permit a slight escape of gas around it adjusted to rise by the gaspressure upon the opening of said outletvalve, to permit gas to pass from the inlet to the outlet pipe, and to fall upon a decrease of said gas-pressure, substantially as shown and described.

5. An improved gas-check embodying a cylinder closed at the bottom with inlet and outlet pipes adjacent thereto, a cup-shaped valve adapted to fit and slide in said cylinder to open and close said pipes sufficiently loose to permit a slight escape of gas around it, a cover to close said cylinder, and a valve opening from the interior of said cylinder to permit the escape of air therefrom, substantially as shown and described.

In testimony that I claim the above I hereunto set my hand in the presence of two subscribing witnesses.

GHARLES E. FORSYTH.

In presence of 0. E. HUMPHREY, C. P. HUMPHREY.

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