US2148386A

US2148386A - Gas burner ignition device

Info

Publication number: US2148386A
Authority: US
Publication date: 1939-02-21
Anticipated expiration: 1956-02-21

Description

Feb. 21, 1939. F. A WEGENER GAS BURNER IGNITION DEVICE Filed Jan. 16, 1936 Patented Feb. 21, 1939 PATENT OFFICE GAS BURNER IGNITION DEVICE Francis A. Wegener, Gloucester City, N. .latassiznor to Welsbach Company, Gloucester City, `N. J., a corporation of New Jersey Application January 16, 1336, Serial No. 59,369

Claims.

The present invention relates broadly to the valved control of the owoi fluids, More particularly, it relates "to the valved control of the flow of fluid fuel to burners such 'as 'gas burners.

In gas burners it is customary to provide a thermostatioally operated safety shut-01T which automatically shuts off the supply of gas to the burner should the burner flame become extinguished for `any reason, In such Vburners it is customary to provide means for igniting the burner comprising manually operated, springclosed, bypass Valve means Vcontrolling a bypass flow around the main `or burner yvalve which is shut off by the thermostat safety shut-off. This `bypass flow, when ignited, `serves to operate the thermostatic means Acontrolling the burner valve,

causing it to open that valve. When the burner valve has been opened sufliciently `to provide a suiicient iiow of `gas therethrough 'to provide a self-maintaining flame at the burner ports, the bypass flow is terminated. This operation takes an appreciable interval of time, and the necessity of manually holding the bypass valve open for this period lconstitutes an annoyance to the user of the burner.

The principal object of the present invention is to provide apparatus in the use of which a bypass flow may be established around a closed valve and, without further attention bythe operator, automatically terminated upon the opening of the said valve Ya predetermined distance.

Another object of `the invention 4is to provide improved, valved, ignition apparatus for burners of the automatic thermostatic safety shut-off type embodying means for :automatically maintaining the bypass ilow to the burner for the period required by the `thermostatic means to open the main burner valve 'suflioiently to establish a selfmaintaining llame and for automatically shutting off the bypass flow thereafter.

Other objects of the invention will appear in connection with the description of the attached figures which form a part of this speciiication and which show a form of the invention chosen for illustration, and in which:

Figure 1 shows a cross-section of a `gas burner, burner valve, thermostatic safety shut-oil and ignition unit, with some parts shown in elevation.

Figure 2 vshows an end View yoi a portion of the apparatus oi Figure 1, with parts in cross-section.

Referring to the drawing, I generally indicates the burner valve casing provided with the charnber 3 on the gas inlet side of. the main or burner valve lwhich seats on seat 5. The burner valve "9&4 establishes or cuts off communication between the chamber 3 and the chamber Ii on the outlet side of the valve which is in open communication with the burner tube 1 which is provided with burner ports indicated 'at 8.

The burner valve is provided with the stem 9, which terminates "in or is attached to the adjusting screw I6 which is in threaded engagement with the end of the burner tube. II isa lock-nut for looking the `adjusting screw I0.

'The other end of the `stem `Sl fits loosely in a recess I2 in the disc of thevalve 4, abutting a washer I3 arranged ina spring chamber I4 in the valve body provided with the spring I5 which is seated lagainst the Valve body and the Washer.

The valve disc is recessed at IB to Areceive Athe trigger cap member I1, which is in loose sliding engagement with therecess and in tight engagement with the trigger pin I8. The cap member I'I also 'forms a 'collar-bearing at I9, with the hollow lug 20 formed on the interior `of valve casing and extending `within the chamber 3. The trigger pin I8 passes through the lug 20 and slides "in the bushing `2v`I in valve casing I. The `capv member I1 also forms a `seat for one end 'of the spring 22, the other end of which is vseated against the interiorl ofthe valve casing I. The trigger cap and pin move as one piece `and together may be termed the "trigger.

23 generally indicates the ignition valve unit which is attached to the valve casing I as, for instance, by screws such as 24 (shown in Fig. 2). Chamber 3 in the valve casing `I is in open communication with the chamber 25 in the ignition valve unit 2'3 by Way -of passage 26 in the valve casing 'I and the ignition valve unit 23. `Chamber 25 Ais `provided with the spring-closed, flash lighter ValvelZI, which establishes or cuts voff communication from the chamber 25, `by way of passage 28 in the ignition valve unit and the valve casing I, to the torch 29, which is adapted to direct a flame to the burner ports'B.

In the apparatus illustrated, the Valve 21 is manually operated by the push-button 30 to open the valve, and is provided with the spring 3| adapted to close the valve on the seat 32 when pressure on the push-button is released. f

The chamber `25 is also provided with the spring-closed valve 33, provided with seat 34 and spring 35 and adapted to establish or out ofi" communication between chamber 25 and the chamber 6, by way of passage 36 and annularpassage 3'1 in the ignition valve unit and passage 38 in the burner valve `casing I, providing a bypass around the burner valve 4 when valve 33,is open.

Within the chamber "25 and positioned vbetween the valves 21 and 33, there is provided the notched latch-block 39, provided with notch 49. The block ts loosely Within the chamber and is adapted to be moved longitudinally in the chamber by the valve 21 on, the opening of that valve, thereby actuating valve 33 to open it against the pressure of the spring 35.

The latch-block 39 is pressed laterally against the end of the trigger I8 by the spring 4I, so that on movement of the latch-block by lthe valve 21, when the burner valve 4 is closed, the notch 48 is adapted to engage the end of the trigger I8 which extends slightly beyond the face of the bushing 2l and into the chamber 25 in the closed position of the burner valve.

The passage 38 is provided with throttling means, as for instance the throttling screw 42, to adjust the quantity of gas bypassed around the burner valve 4 when the Valve 33 is open. This screw may be covered as by the plug 43.

44 indicates an orifice plug with an orice 45 of diameter chosen with regard to the gas rating of the burner for the duty required of it.

In operation, the adjusting screw I0 on the valve stem 9 is so adjusted that, when the burner tube 1 is cold and contracted in length, the burner valve 4 is tightly seated and the gas shut off from the burner, and, when the burner tube is hot and expanded in length by the heat of the combustion at the burner tube, the burner valve 4 is moved 0E the seat 5 to pass freely the gas flow permitted by the orice 45.

The bushing 2I is set so that, when the burner tube is cold and the burner valve 4 is closed, the

*Mend of the trigger I1-I8 projects slightly beyond the face of the bushing.

To ignite the burner, assuming gas has been turned on 4from the gas supply, the push-button 38 is pressed downward, opening the flash lighter valve 21 and moving the latch-block 39 longitudinally of the chamber 25, thereby opening the bypass valve 33.

As the chamber 25 is in open communication with the gas inlet 2 by Way of chamber 3 in the valve casing and passage 2'6 in the valve casing and ignition Valve unit, the opening of valve 21 admits gas to the torch 29 by way of passage 28, and the opening ofvalve 33 admits gas to burner port 8 by way of passage 36, annular passage 31, passage 38, chamber 6 in the valve casing and the burner tube 1.

The gas issuing from the torch 29 may be ignited by any convenient means, as by a match or by a constantly burning pilot flame. The resulting torch flame is projected to the burner ports, igniting the gas bypassed around the burner valve 4 by the opening of valve 33.

In the movement of the latch-block 39, as the block slides, the block is urged against the end of the trigger 2I by the spring 4I. The notch 48, moving opposite to the slightly projecting end of the trigger, is engaged thereon by the lateral pressure of the spring 4I, latching the block in this position and holding the valve 33 open,

maintaining the bypass flow to the burner ports Aafter pressure on the push-button 38 is released and the valve 21 closed by the spring 3l, cutting oi the gas flow to the torch l29 and extinguishing the torch name. Y

The heat developed by the combustion of the 4bypass gas flow warms the burner tube, causing it to expand and lengthen. The pressure of the spring 22 causes the valve 4, stem 9, the trigger cap I1 and trigger pin I8, to follow the movement of the far end of the burner tube 1, the

trigger cap member I1 sliding on the lug 20, and the trigger pin I8 sliding within the bushing 2|. The movement of the valve 4 opens the direct flow to the burner tube from chamber 3 through the valve 4-5 and chamber 6. When the valve has opened suiliciently, the movement of the trigger causes the trigger pin I8 no longer to project beyond the face of the bushing, withdrawing the end of the trigger from the notch 48 in the latchblock 39. This releases the Valve 33, which is closed by the action of the spring 35, cutting off the bypass ow around the burner Valve 4. The closure of the valve 33 moves the latch-block, so that the notch 40 is no longer opposite the end of the trigger pin I8.

Should the burner ilames be extinguished for any reason, the cooling and consequent shortening of the burner tube moves the stem 9 inwardly toward the seat, reseating the burner valve 4. The stiff spring I5, interposed between the end of the stem and the Valve body, releases the parts from undue strain which might be imposed by the shortening of the burner tube. 'I'he seating of the valve 4 moves the trigger so that it again extends slightly beyond the face of the bushing 2I and against the latch-block 39, so that the apparatus is automatically in position for the above-described ignition operation.

It will be seen from the above description that it is unnecessary to hold the ash lighter valve and the bypass valve open manually until the combustion of the bypass heats the burner tube suciently to open the burner valve. It is only necessary to turn on the gas from the supply and momentarily press the button, igniting the torch with a match or pilot ilame. The button may then be released and the maintenance of the bypass flow and its shut-off are automatically performed without further attention.

By adjusting the bushing 2|, the length of the projection of the'trigger pin I8 beyond the face of the bushing in the closed position of the burner valve may be changed to adjust the release of valve 33 and the cut-off of the bypass flow with respect to the degree of opening of the burner valve, so that the bypass ow is not cut off until the burner tube reaches a sufficiently high temperature to provide a self-maintaining flame by way of the open burner Valve.

The trigger cap member I1 sliding on the lug 28 and the trigger pin I8 sliding in the bushing 2I form bearings to guide the movement of the burner valve 4, While the loose fit of the Valve stem 9 and the trigger cap member I1 in the disc of valve 4 provides suilicient freedom to permit the valve to adjust itself on the seat 5.

I do not intend to be limited save as the scope of the prior art and of the attached claims may require.

I claim:

l. A gas burner ignition device comprising, a casing having an inlet and an outlet therein, a main valve controlling the supply of gas from said inlet to said outlet, a thermostatic device controlling said main valve and arranged to operate when heated by combustion of gas supplied to said outlet, a bypass conduit between said inlet and said outlet and bypassing said main valve, a bypass valve controlling said bypass conduit, a torch adapted to play a jet of name to ignite gas passing from said outlet, a torch conduit leading from said inlet to said torch, a torch valve controlling said torch conduit, a latch block interposed between said torch valve and said by- Passvalve so that movement of said torch valve Cil to open position opens said bypass valve, and a latch controlled by said main valve for holding said latch block in position to hold said bypass valve open when said main valve is closed.

2. A gas burner ignition device comprising, a casing having an inlet and a plurality of burner outlets therein, a main valve controlling the supply of gas from said inlet to said outlets, a spring stressing said valve toward open position, a rod connected to a portion of said casing and to said main Valve, whereby said valve can open upon expansion of said portion of said casing due to heat developed at said burner outlets when gas is burned at said outlets, a bypass conduit between said inlet and said outlets and bypassing said main valve, a bypass valve controlling said bypass conduit, a torch adapted to play a jet of flame adjacent said outlets, a torch conduit lead ing from said inlet to said torch, a torch valve controlling said torch conduit, a latch block interposed between said torch valve and said by` pass valve so that movement of said torch valve to open position opens said bypass valve, and a latch controlled by said main valve for holding said latch block in position to hold said bypass valve open when said main valve is closed.

3. A gas burner ignition device comprising, a hollow casing having a gas inlet therein, a hollow burner tube attached to said casing and having a plurality of burner outlets therein, a main valve located in said casing between said inlet and said burner tube and controlling the supply of gas from said inlet to said outlets, a spring in said casing stressing said main valve to open position, a rod adjustably secured at one end to said burner tube and pressing at its other end against said main valve, a bypass conduit leading from said inlet to said outlets and bypassing said main valve, a bypass valve controlling said bypass conduit, a torch adapted to play a jet of flame adjacent said outlets, a torch conduit leading from said inlet to said torch, a torch valve controlling said torch conduit, a latch block interposed between said torch valve and said bypass valve so that movement of said torch valve to open position opens said bypass valve, and a latch controlled by said main valve for holding said latch block in position to hold said bypass valve open when said main valve is closed.

4. A valve casing providing a fluid way, a main valve in the fluid way, means to open and close the main valve, a by-pass conduit communicating with the fluid Way on either side of the main valve, a by-pass valve in the conduit, means to open the by-pass valve, a trigger loosely fitting in a recess in a face of the main valve and urged to follow the movement of the main valve by a spring member seated against said trigger and the valve casing, said trigger acting to automatically restrain the by-pass valve in open position when opened with the main valve in closed position and for automatically releasing the by-pass valve upon movement of the main valve from its closed position, and means for automatically closing the by-pass valve upon such release.

5. A valve casing providing a uid way, a main valve in the fluid Way, means to open and close the main Valve, a by-pass conduit communicating with the fluid Way on either side of the main valve, a by-pass valve in the conduit, means to open the by-pass valve, a trigger tting loosely in a recess in a base of the main valve and urged to follow the movement of the valve by a spring member seated against said trigger and said valve casing, said trigger provided with a trigger pin arranged in sliding engagement with a bushing' in said casing and extending there through and beyond the face of said bushing in the closed position of the main valve, said trigger serving to automatically restrain the by-pass valve in the open position when opened with the main valve in closed position and for automatically releasing the by-pass valve upon movement of the main valve from its closed position, means for adjusting the projection of the end of said trigger pin beyond the face of said bushing, and means for automatically closing the by-pass valve upon said release.

FRANCIS A. WEGENER.