US1731196A

US1731196A - Safety automatic operating means for pilot lights

Info

Publication number: US1731196A
Application number: US255063A
Authority: US
Inventors: Eli A Finn
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-02-17
Filing date: 1928-02-17
Publication date: 1929-10-08
Anticipated expiration: 1946-10-08

Description

PILOT LIGHTS Oct. 8, 192-9. E. A.FINN

"SAFETY AUTOMATIC OPERATING MEANS FOR Filed Feb. 17, 1928 2 sheets-sheet 1 N INVENTOR Z Z1 1. Finn. BY

ATTORNEY E.-A. FINN ,731,196

Filed Feb. 17. 1928 2 sham-sheet 2 SAFETY AUTOMATIC OPERATING vmum's Fba PILOT LIGHT;

- INVENTOR EZLfl. fin n.

ATTORNEY Patented Oct. 8, 1929 UNITED STATES ELI n. FINN, or

NEW YORK, N. Y.

SAFETY AUTOMATIC OPERATING MEANS FOR PILOT LIGHTS Application filed February -17, 1928. Serial I I'o. 255,063.

This invention relates to devices for automatically controlling the gas supply to the pilot light of a gas stove upon the opening of the burners valve.

eifective and easily installed nature which includes a novel pilot lighb controlling valve, by means of which and the cooperative connection between the same and the burners valve the pilot flame is enabled to flash on as soon as a burners valve is moved toan extent suflicient to start the flow of gas to the burner. Another object is so to construct the pilot valve operating mechanism that during the commencement of the act of turning on a burners valve, the pilot light valve will be opened and held open until the burners valve has been moved far enough to cause gas to issue from the burner and become ignited, further opening of the burners valve then causing a release of the pilot lights valve and the reduction of the pilot flame to the minimum.

Another object is to provide a means for operating the valve of a pilot light separatelyfrom a plurality of burner valves through a common actuator, so arranged that the actuator will at all times be ready to function as soon as one or another of the burner valves Figure 1 is a plan view of a four burner.

gas stove and pilotwith my invention applied. a

Figure 2 is an enlarged detail plan view of the burners valve and the pilot lights valve together with the mechanism efiecting cooperation between the same.

Figure 3 is an enlarged detail cross section on the line 33 of Figure 2.

An object is to provide a device of a simple,

Figure 4 is an enlarged detail cross section on the line 4-4 of Figure 2.

Figure 5 is a perspective view of the prime mover arm, per se. 5

Figure 6 is a detail perspective view showing one of the bar moving members and its means of support.

Figure 7 is an inverted plan of the prime moving lever,-per se.

Figure 8 is anenlarged detail section showing one of the pin guides.

In the drawings, in which like numerals of reference designate like parts in all of the figures, 1 represents the usual gas burners of a stove, which burners are provided with the usual mixing tubes 2 and gas valves 5 interposed in the laterals 4 from the gas main 3 to the mixing tubes.

The gas burners valves 5 have stems 6 and handles 7, the handles being secured in place by screws 8. All of the foregoing parts may be of the usual construction.

In applying (my invention to a gas stove 1 provide a nut 9 on each screw 8 to hold the eye 10 ofthe prime mover arm 11 that actuates the automatic device for turning on the pilot valve when a gas burner is turned on.

The arm 11 has an end 12 to which is pivoted a dog 15, a stop 13 being provided on the end 12 to limit the movement of the dog 15 in one direction.

The arm 11 has a fork 14 to fit around the valve stem and assist the eye 10 in maintaining the arm 11 in a rigid connection with the handle end of the valve stem. 1

16 is a restoring spring connecting the dog 15 with the end 12 of the arm 11 and continuously tends to hold the dog against the back stop 13 hereinbefore referred to. I

17 designates a stationary plate which, through the medium of brackets 18, is mounted on the gas main 3 and rigidly secured thereto. A movable bar 19 is'pivoted at 20 tothe plate 17 and normallylies approximately parallel to the plate but separated "therefrom, a spring 21 being provided for moving the bar away from the plate. The bar 19 also is guided on pins or lugs22 carried by the stationary plate 17 A plurality of bar-moving or secondary levers 23 are provided, one for each burner valve. These levers 23 are suitably supported from the plate 17 by brackets 26 to which the levers 23 are pivoted as shown. The levers 23 carry anti-friction rollers 24 which are adapted to work against the bar 19 when pressed into engagement with the same by the action of the dog 15. In order to limit the movement of the lever 23 in a direction to remove the roller 24 from engagement with the bar 19, a stop 27 is provided on the'bracket 26 to which bracket the lever ispivoted.

The bar 19 carries a pilot valve operating arm 28 which has a cam 29 to press on the stem of the pilot valve and push it ,down'to open the flow of gas to the pilot burner.

The pilot valve, which constitutes one of the improvedfeatures of my present invention, embodies a casing 34 having a suitable inlet duct or passage connected by a lateral 30 with the main 3. Italso has an outlet duct or passage connected bv a pipe 31 with the pilot burner 32, the latter having the usual a guard (ap 33, as indicated.

The casing 34 has a tapered chamber intersected by the inlet and outlet ducts respectively to receive the tapered plug 35' which acts as a valve .seat and which is itself provided with gas ports 36 to effect communibeing located around the stud within the cas-- ing in a manner continuously tending to seat the valve 38- In order to prevent escape of gas through the bottom joint of the valve, packing washers 41 and 42 respectively are provided.

It will be observed by reference to Figure 3 of the drawings that the tapered valve spindle 38 has a cylindrical bottom. section 46 and a cylindrical top section 47. The

cylindrical bottom section 46 fits the cylindrical bottom portion 48 of the casing 34 as shown.

The valve stem has a button 49 with which the cam 29 cooperates.

In using my invention the parts are so adjusted that when the burner valves are in the closed,position the dog 15 of each valve will rest in working contact with the lever 23,

the rollers 24 of which always lie in proximity to the bar 19. In the normal position of the bar (the position away from the supporting plate) it will hold the cam 29 in a position to release its pressure on the button 49 of the pilot valve so that only the normal flame of the pilot light will burn when the burner valves are in the closed position. The degree of this normal flame may be adjusted by means of the nut 44 since by turning that nut the valve 38 may be moved from or permitted to be moved toward its seat, accordingly as the nut is turned one way or the ,other. Having adjusted the pilot burner to give the normal flame, then when .a burners valve is turned from the closed toward the open position the dog 15 will press against the heel of the lever 23, forcing theroller 24 to press the bar 19 toward the supporting plate 17 and thereby cause the cam 29 to ride the button 49.- Since the cam is prevented from rising through the medium of its arm 28 it necessarily follows that the valve 38 will be depressed. Depression of the valve 38, of course, increases the clearance between the valve and its seat and permits a greater flow of gas through the pilot burner, which causes the pilot light to flare and project a flame to each heating burner. The heating burner whose valve has thus been turned on will have the gas issuing from the burner ignited by the projected pilot flame. .After the burners valve has been moved toward the fully opened position through a definite distance the dog 15 will ride olf the lever 23 and permit the spring 21 to return the bar 19 to its normal position, thereby removing the cam 29 from the button 49 and permitting the pilot. valves spring 45 to restore the pilot valve to its normal condition, leaving it ready to be operated again should any other burnerbe turned 'on. v

.In turning off the burner valve the dog 15 will pass over the heel of the lever 23 and again come into position for operation.

From the foregoing description, taken in connection with the accompanying drawings, it is thought the complete construction, operation and advantages of my invention will be readily understood by those skilled in the art to which my invention relates.

While I have disclosed a certain specific embodiment of my invention itis obvious that changes in the details of construction,-

arrangement and design of parts may be made without departing from the spirit orthe scope of the appended claims.

What I claim is:

- valve, a pilot valve actuating cam carried b said bar, a bar moving lever adjacent eac burner valve, means for mounting said bar moving leverindependently of,said bar, and a lever actuatingarm on each burner valve 1. In a stove having burner valves and a stem to actuate ,its respective bar moving lever as the burner valve is opened for the purposes specified.

2. In stoves having a plurality of burner valves and a pilot valve; a supporting plate and a bar hinged thereto at one end, said plate and bar being associated with all said valves, a pilot valve opening cam device carried by said bar and means operable by each burner valve separately to cause operation of said bar as a burner valve is opened, thereby to open said pilot valve and a spring 'device on said plate to engage the free end of said bar and urge said bar in one direction. 3. In stoves having a plurality of burner valves and a pilot valve; a supporting plate and a bar hinged thereto, said plate and bar being associated with all said valves, means operable by each of said burner valves to actuate said bar 'to increase the opening of said pilot valve, said means including a bar moving lever and a prime mover arm for each burner valve.

4. In stoves having a plurality of burner valves and a pilot valve; a supporting plate and a bar hinged thereto. said plate and bar being associated with all said valves, means operable by each of said burner valves to actuate said bar to increase the opening of said pilot valve, said means including a bar moving lever and a prime mover arm for the burner valve, said prime mover arms each having one-way-operating dogs to actuate the respective levers.

5. In stoves having a heating burner and its burner valve, and having a pilot and its pilot valve; means to operate said pilot valve to increase the action of the pilot burner for igniting fuel issuin from the heating burner upon opening the burner valve, said means comprising a pivoted bar having a cam member associated with said pilot valve, an actuating arm carried by said heating burner valve, and means mounted independently of said bar and operated on by said arm to cause I movement of said bar thereby to actuate said pilot valve.

6. In stoves having a heating burner and its burner valve, and having a pilot burner and its pilot valve; means to operate said pilot valve to increase the action of the pilot burner for igniting fuel issuing from the heating burner upon opening the burner valve, said means comprising a pivoted bar having a cam member associated with said pilot valve, an actuating arm carried by said heating burner valve, means operated on by said arm to cause movement of said bar thereby to actuate said pilot valve, said last named means compris ing a bar-moving-lever and a one-way-acting dog carried by said actuating arm to engage with said lever for the purposes specified.

7. Instoves having pilot lights and their valves, a pilot burners valve comprising a casing with an inlet and an outlet passage, a tapered plug intersecting said passage and itself having a tapered passage and ports leading therefrom to said inlet and outlet sides of said inlet and outlet passages, a tapered spindle in said tapered passage,

yielding means tending to seat said spindle to said chamber and an outlet duct from said chamber, a tapered plug filling said chamber and itself having a passage connected with said inlet and outlet ducts, a valve spindle with tapered seat in said passage, spring means in said casing to seat said spindle,

means operable from the outside of said casing to move said spindle against the springs action, and other means outside said casing to adjust the position of said spindle thereby to increase or diminsh the flow of fuel through said passage, and means packing said plug and spindle against leakage of fuel.

9. A pilot burners valve comprising a casing having a tapered chamber, an inlet duct to said chamber and an outlet duct from said chamber, said chamber entering from the upper end of said casing, a stufling box nut with packing secured to said casing over the 'upper end of said chamber, a tapered plug filling said chamber and itself having a passage connected with said inlet and outlet ducts, said tapered plug having a tapered bore with which said plug passage communicates, a valve spindle including a tapered portion within said tapered plug, said valve spindle having its outer surface imperforated, said valve spindle having a cylindrical stem passing through said stufiing box nut whereby the escape of gas around said stem will be prevented, the lower end of said valve spindle being reduced and projected through an aperture in said casing, said casing having a spring chamber, a spring around said reduced end in said spring chamber and a nut on the outer extremity of said reduced end, all being arranged whereby when said valve spindle is depressed gas will flow through said tapered plug passa e into the interior of tapered plug to said outlet ductof the casing,

substantially as specified.

- ELI A. FIVN.