US850626A - Safety-valve. - Google Patents

Description

No. 850,626. PATENTED APR. 16, 1907.

W. H. GREIGHTON.

SAFETY VALVE. APPLIOATION FILED AUG. a, 190e.

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UNITED STATES PATENT OFFICE.

` WILLIAM I-I. CREIGHTON, OF

NEW EAGLE, N SYLVANI.

sAFEr'Y-VALVE.

Specification of Letters Patent.

Patented. April 16, 1907.

Application med Augusta 190e. 'serai No. 329.779.

vfollowing is a specification, reference being had therein to the accompanying drawings. This invention relatesV yto certain new and useful improvements in safety-valves, particula'rly designed for gas-supply pipes.

My'invention has for its object the provision of novel means forauoilrliatically closin a as-su l i e shoul t e ressure o gags bei:T dimififslibd) lir entirely shii)t oif. To this end I have devised a safety-valve adapted to prevent persons from being asphyXiated in a compartment where gas is used as a fuel or for illuminating purposes.y

In this connection my improved valve is l0- cated at a .convenient place upon the gassupply pipe, whereby it can be easily reached and opened should the same be closed by a reduction in the pressure of gas. It is a wellknown fact that persons have been asphyxiated while sleeping by the supply of gas being cut off and then turned on again and escaping through the burner without being ig nited. My invention aims to obviate this danger by the provision of novel means for automatically closing the gas-supply-pipe when the gas-supply is shut off.

The detail construction of my improved safety-valve will be hereinafter more fully described, illustrated, and the main features thereof specifically pointed out in the appended claims.

Referring to the drawings forming part of this specification, like'numerals of reference designate corresponding parts throughout the several views, in which- Figure 1 is a vertical sectional View of my improved valve, illustrating the valve in a closed position. Fig. 2 is a transverse sectional view thereof. Fig. 3 is a similar view, illustrating the valve in an open position; and Fig. 4 is a perspective view of a pivoted locking-disk used in connection with the same.

My improved safety-valve consists of a cylindrical body portion 1, the lower end of the bore 2 thereof being threaded, as at 3, to receive the threaded end of a gas-supply pipe 4. The valve-body 1 is formed with an angullar projection 5, having a screw-threaded recess 6 formed therein to receive the end of an inlet-pipe (not shown) that communicates with a suitable burner, either for heating or illuminating purposes. The recess 6 communicates with the bore 2 of the valve-body by an outlet-port 7.

The upper end -of the valve body 1 is .closed except for a central openin 8, and eX- tending lupwardly from the top of the valvethe upper ends of which are provided with openings 10. In the bore 2 of the valve-body 1 is mounted a valve-head 11, having a vertically-disposed stem 12 which extends upwardly through the opening 8V of the valvebody. To cushion the valve-head 11 within the valve-body, resilient washers or gaskets 14 are placed in eachend of the bore 2 thereof.

Pivotally mounted between the arms 9 is a tween said arms by a pin I16, mountedin the openings 10 of the arms 9. The lockingdisk is provided with a tooth 17, adapted to limit the movement of said disk, and with a conventional form of handle 18, whereby the disk can be easily manipulated.

The normal position of my improved valve is illustrated in Fig. 3 of the drawings, where it will be observed that the valve-head 11 is in an elevated position, permitting gas to pass from the pipe 4 through'port 7 into the recess 6 and t econnecting-pipe thereof. The ressure of gas entering the valve-body 1 is adlapted to maintain the valve-head 11 in the elevated position shown in Fig. 3, and the stem which normally engages the disk 15 retains said disk in a partially-elevated position. Should the supply of gas be shut oif, the weight of the valve-head 11 and the disk 15 causes the valve-head 11 to descend by gravity until it seats upon the lowermost washer'or gasket 14. The valve-head not only closes the pipe 4, but closes the port 7, and is prevented from rising by the disk 15 i being interposed between the upper end of the stem 12 and the disk s pivotal connection with the arms 9. The tooth 17 of the disk 15is adapted to impinge against the side of the stem. 12, at the upper end thereof, and corl rectly position the disk 15,whereby one of its diameters will lie in alinement with the pivotal connection of said disk and the upper end of the stem 12. Should the gas-supply be turned on, it will be impossible for the gas to escape until the disk 15 is elevated to the position shown in Fig. 3 ofthe drawings. It

body are'two diametrically-opposed arms 9, 4

locking-disk 15, said disk being retained be- IOS IIO

is`obvious that the inlet and outlet of my mproved Valve can be reversed, the pipe 4 serving as an outlet-pipe, while the port 7 serves as an inlet-port.

It is thought from the foregoing description, taken in connection with the drawings, that the operation of my improved safetyvalve will be readily apparent, lespecially to those skilled in this art. I do not care to confine myself to the size, proportion, or material used in eonneetion with my improved valve, and I wish it to be understood that such changes in the details of construction as are permissible by the appended elaims may be resorted to without departing from the s irit and scope of the invention.

W at I elaim, and desire to secure by Letters Patent, is-

1. In a safety-valve, the combination With a suitable gas-su ply pipe, of a valvel body connected to sai supply-pipe and havl ing an outlet-port formed therein, upwardlyextending arms carried by said valve-body, a

valve-head slidably mounted in said valve bod a stem carried by said head and exten ing upwardly throu h said valve-body between said arms, a loe ing-disk pivotally mounted between said arms and engagin said stem, a tooth carried by said disk an adapted to limit the/movement thereof, substantially as described.

2. In a safety-valve, a yValve-body having an outlet-port, upwardly-extending arms carried by said valve-body, a valve-head slidably mounted in said valve-body, a stem carried bysaid vhead and extending upvwardly throu h said body between said arms,

a locking-dis pivotally mounted between said arms and engaging said stem, and a tooth on said disk adapted to impinge against the stem and limit the rotative' movement of the disk in one direction.

In testimony whereof Iaix, my signature inthe presence of two witnesses.

WILLIAM H. CREIGHTON. Witnesses:

MAX H. SnoLovrrz, A. J. TRIGG.

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