US620932A - Valve device - Google Patents

Description

No. 62b,932. Patented Mar. [4, I899. w. KANE.

VALVE DEVICE.

(Application filed July 26, 1898.)

No Model) 0 -fl C I H a CT- 3 6L 1! H1 t Witnesses. I Inventor.

Attorney I'n: NOR

ms PETER: co, FNOTG'LITHOH WASHINGTON n c NITED STATES PATENT VALVE DEVICE.

SPECIFICATION forming part of Letters Patent No. 620,932, dated March 14, 1899.

Application filed July 26, 1898- To all whom it may concern/.-

Be itknown that I, WILLIAM KANE, of Phil adelphia, Pennsylvania, have invented an Iinprovement in Valve Devices, of which the following is a specification.

My invention relates to valve devices for controlling the flow of fluid fuel to burners or other fuel-consuming devices; and it consists of the improvements which are fully set forth in the following specification and are shown in the accompanying drawing.

More particularly my invention relates to valve devices for controlling the flow of fluid fuel to the burners of a heater or other fluidfuel-consu min g apparatus,and is particularly designed for the purpose of enabling the flow of the fuel to be automatically controlled and shut off under certain contingencies, so that its escape from non-lighted burners may be prevented.

In the use of gaseous fuel in house heaters or boilers trouble has been experienced heretofore owing to the liability of the gas escaping if for any reason the burners should be extinguished without the supply of gas being positively shut off. For example, if the burners are extinguished through accident or carelessness and the supply-valve is left open, or if for any reason the main supply of the gas to the house is temporarily out off and then turned on again, the gas will escape in the house and annoyance and accident are liable to result.

It is particularly the object of myinvention to cause the supply of fluid fuel or gas to the burners to be positively and automatically shut off when the burners are extinguished, so that the continuous flow of gas through non-ignited burners will be impossible.

It is alsoan object of my invention to enable the flow of fuel or gas to the burners to be regulated automatically to maintain a uniform condition of working in the heater.

In carrying out my invention I employ a valve-motor operated by the pressure in the heater, or, if desired, thermostatically by the temperature, and a valve in the fuel-pipe controlled thereby and operating to open or close to a greater or less extent to increase or diminish the supply of fuel or gas according to the pressure or temperature. In addition to this valve I employ an auxiliary valve Serial No. 686,909-' (No model.)

also controlled by the motor and adapted to close'the fuel or gas pipe when the pressure or temperature falls to such an extent as will occur when the burners are extinguished. This auxiliary or stop valve is so constructed that it may be opened by hand to permit the gas to flow to the burners in startin g the heater. The accompanying drawing shows a vertical sectional view of my improved'valve deof the boiler and adapted to rise and fall under variations in the steam-pressure. Carried by the motor-diaphragm B is a stem F, extending through the cap f above the dia phragm and provided with a branch stem G, carrying the regulating-valve D. This valve is adapted to a seat a in a valve-chest in the pipe 0 and is provided with a small by-pass or orifice d, so that even when the valveD is closed tightly upon the seat e a small quantity of gas or fuel may escape through the bypass, which is of such size as to permit the minimum volume of fuel or gas to escape that may be necessary to keep the burners ignited. The stem F is provided with a second branch stem H, which is connected with the stem I of the stop-valve E, located in a valve-chest e of the pipe 0 beyond the valve D.

The particular construction of the valve E is not material. On the drawing I have shown a slide-valve.

To enable the stop-valve E to be operated independently of the valve-motor B, it is made disconnectible therewith.' Any suitable disconnectible union may be employed. In the drawings I have shown a hook h, carried by the stem H and adapted to engage a pin 6 on the stem I. I have also shown the stem I provided with a flaring end j to maintain the ends of the stems H I in alinement. To facilitate the movements of the valves D and E, their stems G and I may pass through lubricating stuffing-boxes J.

The valves D and E are so disposed relatively to one another that when the valvemotor B is inert or in the position it occupies when the boiler is void of steam the valve E will be closed and the valve D open, as shown in the drawing. At such time the passage of fuel or gas to the burners is prevented. To start the boiler, thevalve E is raised by hand and maybe fastened opened. The gas or fuel passes freely through the valve D E to the burners. As steam is generated the pressure on the diaphragm will lift the stems G H, and when normal pressure is obtained the valve E may be released and connected with the stem H, which being now in a raised position will maintain the valve E open as long as sufficient pressure exists in the boiler, and the gas or fuel may flow continuously to the burners. When the pressure ceasesas when for any cause the burners are extinguishedthe motor 13 will descend, carrying with it the valve E, which will close the passage-way in the pipe 0 and prevent further flow of fuel to the burners. The variations in the pressure in the boiler will operate the motor-diaphragm and the valve B, causing the latter to close to a greater or less extent on its seat 0, and thus regulate the flow of fuel to the burners, increasing or decreasing it as the pressure varies. At the maximum pressure when the valve 1) is closed upon its seat the flow of fuel will continue through the restricted by-pass d, that flow being sufficient for the normal operation of the heater. These ordinarymovements of the valve-motorB under the variations of pressure will not be sufficient to effect the closing of the stop-valve E, as that valve is so proportioned and arranged that it will close only when the motor falls under substantially a cessation of pressure.

As the stop-valveE is provided,essentially, for purposes of protection, it may be disconnected and fastened open whenever desired, the ordinary hand-valve being relied upon to shut off the fuel.

The details of construction may be varied without departing from the invention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with a steam-boiler, of

a burner, a fuel-supply pipe for supplying fuel to the burner, a regulating-valve to regulate the flow of fuel through said fuel-supply pipe but arranged to never fully close the same so that the supply of fuel is never totally shut off by the operation of said regulating-valve, a valve-motor controlling said regulating-valve and operated by the pressure in the steam-boiler, and a stop-valve located in said fuel-supply pipe and operated by said valve-motor.

2. The combination with afuel-supplypipe, of a regulating-valve to regulate the flow of fuel through said pipe, a valve-motor controlling said regulating-valve, a stop-valve in said supply-pipe also controlled by said valvemotor, and detachably connected therewith, whereby said stop-Valve may be moved by hand or thrown out of operation.

The combination of a steam-boiler, a

fuel-supply pipe for supplying fuel thereto, a

regulating-valve in said supply-pipe for regulating the flow of fuel, a valve-motor embracing a diaphragm actuated by steam-pressure in the boiler, a stop-valve also located in said fuel-pipe, and connections between said motor and regulating-valve and stop-valve respectively.

4. The combination of a steam-boiler, a fuel-supply pipe for supplying fuel thereto, a regulating-valve in said supply-pipe for regulating the flow of fuel, a valve-motor embracing a diaphragm actuated by steam-pressure in the boiler, a connection between said diaphragm and regulating-valve, a stop-valve also located in said fuel-pipe, and a detachable connection between said diaphragm and stop-valve.

5. The combination of a fuel-supply pipe, of a valve-motor, and a double-valve device controlled by said valve-motor, and consisting of a regulating-valve and a stop-valve, located in said supply-pipe and operating re spectively to regulate and to stop the ilowof fuel in said pipe under the control of said motor.

In testimony of which invention I hereunto set my hand.

WILLIAM KANE. itnesscs: A

R. M. KELLY, WM. W. Evans.

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