US2444490A - Safety gas burner - Google Patents

Description

G. B. BELLINGER SAFETY GAS BURNER July 6, 1948.

3 Sheets-Sheet 1 Filed Jan. 5, 1945 INVENTOR GEORGE BELLINGER 7' /////,//y

ATTORNEYS July 6, 1948.

Filed Jan. 5, 1945 4 s. B. BELLINGER SAFETY GAS BURNER 3 Sheets-Sheet 2 GEORGE. B-BELLINGER ZZL W ATTORNEYS Patented July 6, I 4

UNITED STATES PATENT OFFICE SAFETY GAS BURNER.

' George B. Beiiingcr, Chicago, Ill. Application January 5, 1945, Serial No. 571,415

7 Claims. (01. 158-117.1)

This invention appertains to gas burners for boflers, cooking ranges and the like, and more.

particularly to a novel safety device for gas burners wherever used.

It is one of the primary objects of my invention to provide novel means for automatically cutting oil the supply of illuminating gas to a burner should the burner flame become extinguished from any cause and'thereby eifectively prevent the occurrence of accidents usually accompanying the accidental extinguishing of gas burner flames.

Another salient object of my'invention is to provide novel means for preventing the flow of illuminating gas from a gas main to a burner should the manually operated control valve for the burner be turned on without the lighting of the burner.

A further important object of my invention is to provide an auxiliary reservoir for supplying gas to a gas burner in suificient quantity to insure the lighting of the burner and the heating of an automatic mechanism for opening a main valve when the manually operated control valve is turned on, thereby allowing the flow of gas from the main source of supply to the burner.

A still further object oi? my invention is to provide a novel and simple meansv for effectively and automatically opening and closing the main supply valve to a gas burner according to the temperature of said burner.

With these and other objects in view the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed, and illustrated in the accompanying drawings, in which drawings:

Figure 1 is a vertical sectional view sh'owing my novel control mechanism incorporated with a gas burner, the view being of a diagrammatical nature only.

Figure 21s a view similar to Figure 1 but showing a slightly modified form of my invention and with the temperature operated valve mounted within the burner.

Figure 3 is a vertical sectional view through a gas burner showing an electrical mechanism incorporated in the burner operated from my thermo-metal control for actuating the valve th'ereby controlling the gas from the main source of supply, the view still being of a diagrammatical nature.

Figure 4 is a view similar to Figure 3 but showing the control'valve actuated from the expanactuated valve operated by the: expansion and contraction of expansible gas which is effected by the heat from the burner.

Figure 6 is a diagrammatical view illustrating another form of my novel control mechanism, the mechanism being particularly adaptable for use on gas stoves.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the several views, the numeral l0 generally indicates a gas burner which can be of any approved type. For the purpose of illustration, I have shown the same to include a hollow body ii provided with gas outlets it which constitute the ignition point of the burner. Communicating with the lower end of the burner is a gas supply pipe ii.

In accordance with my invention I arrange adjacent to the burner ill a gas reservoir it and this I reservoir can be in the nature of a sph'erical tank, if so desired. This tank or reservoir is adapted to be initially filled with gas, as will be later described. The main gas supply line pipe i5 has communication with this reservoir and the flow of gas to the reservoir from the main supply pipe i5 is controlled by a manually operated valve l6 and an automatically operated valve H. A single valve casing It can be provided for these valves and the supply pipe i5 communicates with one end of the casing and a conduit pipe is communicates with the other end of the casing and leads to the reservoir. The valve casing has formed therein two channels indicated respectively by the reference characters 20 and El and the valve it controls the flow of gas through the channel it but the automatically operated valve ll controls the flow of gas through the channel ii. The ilow of gas from the reservoir it is through the pipe i3 and this pipe l3 has incorporated in/the length thereof a control valve 22. The control valve consists of a casing 23 having a channel therethrough'. The valve body 24 controls the flow of gas through the channel and consequently the flow of. gas from the reservoir and to the burner. The valve l6 and the valve M are provided with a common stem 25 which can be turned by a hand wheel 28 or similar de- I vice. Th'e valve stem 25 is threaded into the valve casings i 8 and 23 in such a manner that when the stem is turned in one direction the valve is will be moved to a closed position and the valve 2| to an open position. when the stem is turned in the opposite direction, the valve 24 will be closed and the valve 15 will be opened.

As heretofore stated, the valve 11 is automatically-operated and to pull the valve in and out. of! and on its seat I provide a thermo-metal control. This can consist of a bowed strip of bi-metallic material 21 carried by a bracket 23 which is preferably formed from non-heat conducting material. 'Secured to the central portion or the bowled metallic thermostat 21 is the stem 29 oi the slide valve 11. To facilitate the conducting of heat to the thermostat, a heat-conducting strip 33 can be secured to the thermostat adjacent to the central portion thereof; and this strip can terminate adjacent to theburner openings l2.

It is to be understood that this showing above described is of a diagrammatic nature and that valves of suitable characters other than shown in Figure 1 can be used.

In operation of this form of my invention, initially the stem 25 is turned so that the valve 24 will be in a closed position and the valve IE will be in an open position. Hencegas can. flow from the gas main into the reservoir but no gas will flow to the burner. When it is desired to light the burner the stem 23 is turned by the operator so that the valve It will move to a closed position and the valve 24 will move to an open position. The gas can now flow from the reservoir l4 to the gas burner. If for some reason the burner is not lit; no harmful results will take place in that only the small supply of gas stored in the reservoir I4 will escape. Considering that the reservoir is placed in communication with the burner and the burner is then lighted by the operator, heatwill be generated which will effect the thermostat 21 for drawing the automatically controlled valve I1 I pipe The pipe 41 with one end oi the coil 43 through a branch pipe also has communication 43.- I'he opposite end of the coil communicates withone end oi a valve casing 49 and the opposite end of the valve casing 49 communicates with the burner through a conduit pipe 53.

The valve casings 45 and 49 are of a. similar type and the valve casing 46 is provided with a passageway 5|. through which the gas flows. The flow of gas through the passageway 5| is controlled by a slide valve 52 having an internally threaded stem 53. Threaded in the stem 53 is a rotatably threaded rod 54.

' The valve casing 49 is also provided with a channelway 55 through which the gas flows and a slide valve 55 is provided for controlling the flow of gas through the channel. The slide valve has formed thereon an internally threaded stem 51 into which is threaded a rotatable rod 58. One rod 54 is provided with right-hand threads while the rod 58 is provided with left-hand threads, and

- these rods are adapted to be synchronously turned by single operating handle or Wheel 59. This can be accomplished by a beveled gear secured to the wheel and meshing with beveled pinions 5i and 52 secured respectively to the rods 54 and 58. By turning the hand wheel 59 in' one direction, the valve 52 will be closed and the valve will be opened. By turning the handle wheel in the opposite direction, the valve 55 will be closed and the valve 52 will be opened.

This view is also of a diagrammatioal nature and'various changes can be made regarding the oil of its seat. Gas can now flow from the main pipe l5 through the channel 2| through the conduit I 9, through the reservoir l4, through the pipe I 3, into the burner and the burner will be maintained in a lighted condition.

Should the burner be extinguished through any matic controlled valve 35 within the gas burner 35. This valve 35 includes a. valve casing 31 having a passageway 38 therethrough for the flow of gas and the flow of gas through the passageway is controlled by the slide valve 39. This valve 39 has formed. thereon or secured thereto a stem 49 which is secured to the bi-metallic thermostat 4|. Connected with the thermostat is a heat conductor strip or can 42 so that heat generated by the burner will be readily conducted to the thermostat 4|. When the thermostat is heated, the valve 39 will be drawn oil of its seat. In lieu of providing a reservoir in the form of a tank as shown in Figure 1, I can provide a reservoir which can consist of a coil 43 of copper or similar tubing. The main gas supply pipe communicates with a manifold 45 and this manifold has one branch communicating with one end oi the valve casing 31 and the other branch thereof communicates with a valve casing 43 which will be later described. The opposite end of the valve casing 31 has communicating therewith a gas conduit pipe 41. and this pipe leads to the other end 01' the valve casing 45 opposite from the branch shape of the valves and the operating means therefore.

Initially, the valve 52 is in an open position and the valve 55 is in a closed position and gas from the main conduit 44 will flow through the channel 5|, through pipe 41, and into the coil 43. Gas will be prevented from flowing to the burner by the-valve- 55.

when it is desired to light the burner, the hand wheel 59 is turned and the valve 52 is moved to a closedposition and the valve 55 is moved to an open position, as shown in Figure 2. Gas will now now from the coil 43 to the burner and the burner can be lit. Upon the heating of the burner, the thermostat 41 will raise the slide valve-39 and gas will be permitted to flow from the pipe 44, through the passageway 38 of a. valve 35, through the pipe 41, through the pipe 48, through coil 43, through the passageway 55 of valveg49 to the burner. If the burner is extinguished, the thermostat will cool and close the valve 39, thus efi'ectively shutting off the flow of gas to the burner.-

I can provide other means for operating the valve 39 and in Figures 3, 4 and 5 I have shown various forms for actuating this valve.

As is clearly illustrated in Figure 3, I can provide a solenoid for actuating the valve 39. In this instant, the valve is provided with a stem 6| which forms the core of the solenoid. The energizlng of the solenoid is controlled by a'switch 62 including a stationary contact 63 and a movable contact 54 carried by a pivoted switch lever 55.

and the solenoid will be energized and'the core 6! will be raised, moving the valve 39 to an open position. The other parts of the control can be the same as shown in Figure 2.

In Figure 4 the valve wean be operated by a piston lll'and this piston is connected directly to the stem' ll of the valve. The piston It is slidably mounted ina cylinder it, the lower end of which has communication through ports it with a chamber Ml. This chamber M can be mounted directly within the burner it. Secured to the upper end of the chamber is a collar It formed from heat conducting material, and this collar is arranged adjacent to the burner opening. The chamber It is filled with a gas with a u h gh coemcient of expansion, such as carbon dioxide, ammonia and the like. In this form of my invention, upon the lighting of the burner, the chamber ill will become heated and the gas contained therein will expand forcing the piston it to rise. The raising of the piston will open the valvev 39. The burner will then operate in the same manner as the burner described in Figure 2.

In Figure 5, I have shown means for operating the valve 39 similar to the means shown in Figure 3. However, in Figure 5 the electric switch 62 has its movable switch lever ta actuated by the expansion and contraction of a gas instead of the bi-metallic thermostat M. Hence, I arrange within the burner at a chamber at and this chamber is filled with the preferred gas having a high coeflicient of expansion. The chamber has communication through ports Kit with the lower end of a cylinder at. Slidably mounted within the cylinder is the piston tit. This piston is connected with the movable switch lever as by a rigid rod tit. This rod is preferably heat insulated from the switch lever W. The chamber tit also carries the heat conducting collar at which is disposed ,adjacent to the burner. Hence, the heat from the burner will be quickly conducted to the chamber for heating the gas therein. In operation of this form of my invention, upon the lighting of the burner and the heating of the gas in the chamber at the piston 83 will be raised pulling up on the rod M and moving the switch lever 65 to a circuit closing position. This will energize the magnet or solenoid 60. Upon the energizing of the solenoid the valve is will be moved to its open position and the apparatus functions as shown and described in Figure 2. While the valve it will return to its closed position by gravity upon the opening of the circuit, the valve can be spring pressed if so desired.

In Figure '6, I have shown a still further modifledform of my invention. and this form can be effectively used on gas ranges and particularly on the pilot burner thereof. Hence, the burner 86 in Figure 6 can be considered as a pilot light and mounted adjacent to the pilot light is a support 87 and a bi-metallic thermostat 8d. Heat is quickly conducted from the burner 85 to the central part of the thermostat by means of a heatconducting strip 89. This strip is connected to the thermostat and terminates in close proximity to the burner. Secured to the thermostat is a valve stem 90 and the stem is secured to a slide valve 9! mounted in a valve casing 92. The valve casing has formed therein a passageway 93 and the valve controls the flow of gas through said passageway. One end of the passageway has communicating therewith a pipe 94 which conducts gas to the burner and the other end of the passageway has communicating therewith a gas conducting pipe 95 which leads from a manually adjustable setting valve 96. This adjusting valve 96 includes a valve casing 97 having a passageway 98 therethrough and flow of gas through the passageway is controlled by a valve at which can be moved toward and away from its seat by a set screw IM or the'like adjustment. The opposite end of the valve casing has communicating therewith a gas conducting pipe illl which can lead from the source of supply of gas. Communicating with the pipe ml is a branch pipe I02, and this branch pipe W2 leads to a hand controlled valve 103. The hand controlled valve m3 is provided with a longitudinally extending passageway ltd and the opposite end of the passageway from the pipe 502 has communicating therewith a pipe it which communicates with the pipe at. A slide valve not controls the flow of gas through the passageway, and this slide valve can be actuated by a thumb button or the like ml. The valve is normally held on its seat by a spring 8%.

In operation of this form of my safety appliance, considering that the pilot light 1% is lit, the bi-metallic thermostat 88 becomes heated and moves the valve ti to an open position. Then.

a controlled quantity of gas will be continuously supplied to the pilot as long as the pilot light is lit. When it is desired to light a burner the valve M6 is operated and gas in greater quantity will be supplied through pipe [t2 through valve its, pipe W5, pipe 9% and to the burner. As soon as the cooking burner becomes lit, the valve MS can be released and the spring Wt will move the same on its seat. Should the pilot light go out through any cause, the thermostat dd will cool, moving the valve at to a closed position. This will efiectively shut oif the flow of gas to the pilot and prevent the escape of gas therefrom.

In order to initially light the pilot, the manu al valve Hi6 can be opened and held open until the thermostat 88 becomes sufficiently heated to raise the valve 9i.

While I have shown a bi metallic thermostat (it for operating the valve 9!, obviously the means shown in Figures 3, 4 and 5 can be employed if so desired.

While I have shown my invention utilized on illuminating gas burners, it is to be understood that the principles of my invention are equally applicable to burners using liquid fuel such as kerosene, and the like.

Changes in details may be made without departing from the spirit or the scope of my invention, but what I claim as new is:

1. In a. safety device for gas appliances, a

' burner, a gas reservoir for supplying a limited quantity of gas to the burner, a manually operable valve for controlling the flow of gas from the reservoir to the burner, a controlled valve for controlling the how of gas from a main source of supply to the burner, automatic means for opening and closing the last mentioned controlled valve according to the temperature of the burner, and valve means for admitting the flow of gas from the main source of supply to the reservoir when the manually operable valve is in a closed position thereby shutting off the supply of gas from the reservoir to the biu'ner.

2. In a safety device for gas appliances, a gas burner, a reservoir adapted to contain a limited quantity of gas, a conduit for supplying gas fromthe reservoir to the burner, a manually operated valve for controlling the flow of gas through said other will be closed and vice versa, and a controlled valve automatically operated according to the temperature of the burner for control ling the flow of gas through the other valve passageway. V 3. In a safety device for gasappliances, a gas burner, a reservoir adapted to contain a limited quantity of gas, a conduit for supplying gas from the reservoir to the burner, a manually operated I valve for controlling the flow of gas through said conduit, a conduit for-supplying gas to the reservoir from a, main source of gas supply, a. valve casing interposed in the length of the last mentioned conduit having a pair of passageways therein for the flow'of gas therethrough, a manually operable valve for controlling the flow of gas through one passageway, said valve being synchronously actuated with the first mentioned.

valve'so that upon the opening of one valve, the other will be closed and vice versa, and a. controlled valve automatically operated according to the temperature of the burner for controlling the flow of gas through the other valve passageway, said automatic control means including a bimetallic thermostat arranged adjacent to the burner.

4. In a. safety device for gas appliances, a gas burner, a, reservoir adapted to contain a limited quantity of gas, a conduit for supplying gas from the reservoir to the burner, a manually operated valve for controlling the flow of gas through said conduit, a conduit for supplying gas to the reservoir from a main source of gas'supply, a valve casing interposed in the length of the last mentioned conduit. having a pair of passageways therein for the flow of gas therethrough, a manually operable valve for controlling the flow of gasthroughone passageway, said valve being synchronouslylactuated with the first mentioned valve so that upon the opening of one valve, the other will be closed and vice versa, and a controlled valve automatically operated according to the temperature of the burner for controlling the flow of gasthrough the other valve passageway,

said last mentioned valve being arranged within the body of the burner and said automatic operating means including a bimetallic thermostat.

5.- In a safety device for gas appliances. 8. gas burner, a conduit for supplying gas to the burner,

. and a valve automatically operated according to the temperature of the burner for controlling the flow of gas through the conduit, said valve including a valve body, an electrically operated solenoid for moving said valve body to an open and to a closed position, a thermostatically operated electric switch for closing the circuit to the electrically operated solenoid and a source of electric current for energizing the solenoid when the thermostatically operated switch is in a closed a position. a l

6. In a, safety device for gas appliances, a gas burner, a conduit for supplying gas to the burner, and-a valve automatically operated according to the temperature of the burner for controlling the flow of gas through the conduit, said valve including a valve body, means for moving the valve body to an open and closed position including an expasible gas operated piston, a cylinder for the piston, and a chamber for an expansible gas located adjacent to the burner, having communication with one end of the cylinder.

7. In a safety device for gas appliances, a gas burner, a conduit for supplying gas to the burner and a valve automatically operated according to the temperature of the burner for controlling the flow of gas through the conduit, said valve including a valve body, means for moving the valve body to an open or closed position, includin an electrically operated solenoid, a switch for opening and closing the circuit to the solenoid, means for automatically operating the switch, including an expansible gas operated piston and a cylinder for said piston, a source of electric current for energizing the solenoidwhen the expansible gas operated switch is in a closed position, and a chamber having an expansible gas therein located adjacent to theburner and having communicatio 4 with one end of the cylinder.;

GEORGE B. BEILINGER.

nnrmmivcns CITED The following references are of record in the file of this patent:

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