US691784A - Automatic gas-valve. - Google Patents

Description

"no. 691,784. Patented Jan. 28, I902.

C. KOSHALKU.

AUTOMATIC GAS VALVE.

(Application filed. June 17, 1901.)

(No Model.)

WITNESSES INVENTOR.

UNITED STATES PATENT OFFICE.

CHARLES KOSHALKO, OF J OHNSTOWN PENNSYLVANIA.

AUTOMATIC GAS-VALVE.

SPECIFICATION forming part of Letters Patent No. 691 ,784, dated January 28, 1902.

Application filed June 1'7 1901. Serial No. 64,896. (No model.)

To all whom it may concern:

Be it known that I, OHARL'EsKosHALKo, a citizen of the United States, residing at Johnstown, in the county of Oambria and State of Pennsylvania, have invented certain new and useful Improvements in Automatic Gas-Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has relation to automatic gasvalves, and has for its object the provision of means whereby the gas will be positively and automatically shut off from the burner if for any reason it should be accidentally extinguished, as by being blown out or by failure of the supply from the main or in any other manner; and my invention consists in the novel construction, combination, and arrangement of parts hereinafter described and claimed.

Referring to the accompanying drawings, Figure l is a side elevation; Fig. 2, a vertical sectional View; Fig. 3, a top view looking down on the burner from above; and Fig. 4, a detail of the key by means of which the gas is turned on and off in the ordinary manner, all these views being shown on an enlarged scale, so that the parts may be plainly seen and their construction understood.

A designates a gas-burner screwed onto the end of a gas-pipe B. Within the burner A is a horizontal partition 0, which is formed with a valve-seat on which seats a valve D, the

stem of which is connected with a rock-shaft E, the said rock-shaft being journaled in the walls of the burner. The valve D is normallyclosed by a spring F, coiled around the valve-stem between the valve and a bridge F, which extends across the burner-tube and by which the stem is guided. The rock-shaft E projects through the wall of the burner and has fixed on its outer end the lever G. A bent tube H is attached to the burner at one side, and said tube, which is of substantially U shape, has a bulb g on one of its legs, while the other leg is open at its upper end and con-.

tains a piston H, which is attached to one end of the lever G.

I designates a rod that hangs from the other end of the lever G and has at its lower end a hook 2', which engages in a spiral slot k in. a turn-key K, which may be either the ordinary cock of the gas-fixture or simply a turn-key fixed to the burner for the purpose of operating the book 11. Above and to one side of the spiral slot a lug L is formed on the key, the purpose of which is to catch the hook when it has been swung to one side by traveling in the slot.

The tube H is intended to contain mercury or other material which is readily expanded by heat, and the tube is so placed with relation to the flame of the burner that when the gas is burning the heat of the flame will keep the mercury or other material in the tube in an expanded condition and the piston H elevated, in which position the valve D will be held oft its seat and the gas allowed to flow freely through the burner.

Operation: Then it is desired to light the gas, the key K is turned in the direction of the arrow, and the hook c, engaging with the spiral slot, will be directed to one side and will when it reaches the end of the slot eugage with the lug L, and the further turning of the key will draw the rod I down and open the valve D. The gas may now be lighted, and the heat from the flame will act on the expansive material in the tube H and bring such material up against the lower end of the piston H and holdsuch piston up, and thus keep the valve D open so long as the gas is ignited. It by accident the flame is extinguished, material in tube H will contract and allow the piston H to descend and the valve D to close, thus at once and effectually closing off the flow of gas. The hook 1 drops to one side of the lug L when the pressure of the hand is released from the key K, and hence this book offers, no resistance to the movement of the rock-shaft when it is being turned by the descent of piston H.

Having described my invention, I claim- 1. In an automatic gas-valve, the combination of a burner, a valve within the same and normally closedby a spring, a piston connected to said valve and adapted to open the same against the pressure of said spring,,a tube in which said piston works, an expansive material in said tube and means whereby said valve is opened and held open until the expansion of the materialin the tube will operate the piston and maintain said valve open so long as the gas is ignited, substantiallyas described.

2. In an automatic gas-valve, the combination with the burner, a valve therein, and a spring bearing on said valve to normally close the same, of a rock-shaft journaled in the burner and connected with the valve, a lever on said rock-shaft, a tube containing an expansive material, a piston in said tube attached to said lever and actuated by the expansive material, a rod depending from said lever and having a hook at its lower end, a turn-key having a spiral groove in its side and a lug at the end of said groove to engage the said hook.

3. In an automatic gas-valve, the combination with a valve arranged within the burner and means for manually opening said Valve, of means for causing the valve to close comprising a piston, connections between the piston and the said valve, a vesselin which said piston Works, arranged within the heating sphere of the flame, an expansive and contractive material in said vessel controlling the movement of the piston, and a spring to cause the piston to follow the contractions of said material substantially as described.

In testimony whereof I have affixed my signature in presence of two witnesses.

CHAS. KOSHALKO. Vitnesses:

JOHN PARKEs, PAUL McGLosKY.

Images