US2303868A - Ignition device or system for gas and liquid fuel burners - Google Patents

Description

1942- c. s. STUCKENHOLT 2,303,868 v IGNITIQN DEVICES OR SYSTEMS FOR GAS AND LIQUID FUEL BURNERS Filed Feb. 12, 1941 /77' rap/W96 Patented Dec. 1, 1942 I 'rdm'rronpnvrcs onsrs'rm FOB GAS AND uoum rum. BURNERS Casper S. Stuckenholt, Cleveland, Ohio, assignor to The W. J. Sohoenberger Company, Cleveland, Ohio, a corporation of Ohio Application February 12,1941, Serial No. 378,657 7 Claims. (Cl. 175-115) This-invention relates to ignition devices or systems for gas-and liquid fuel burners.

Heretofore it has been the practice to provide a pilot burner adjacent the main burner for lighting the latter. This pilot burner heats an operating element which in turn actuates a gas valve controlling the main gas supply to the burner. This gas valve, preferably located adjacent the main burner, is in addition to the main shut oi! valve or gas cock.

One of the objects of this invention is to provide an electric ignition system in which the auxiliary gas valve now in use will be eliminated. Another object oi the invention is to provide electrically operated latch means iorpreventing actuation of the main shutof! valve or gas cock to the position in which gas is supplied to the main burner, until a suillcient time interval has elapsed to provide for electric ignition of the pilot burnen Still another object of the inventionis to provide means whereby ,the gas valve can be returned to oil or closed position irom full flow position when ilow of current to the electrically operated latch is shut oil. and the latch is in position to prevent actuation of the valve toiull iiow position.

Other objects and advantages of the invention will be apparent as the ensuing description is considered in connection with the accompanying parts being broken away; 7

vlded with an operating stem 6 which projects freely through an aperture 1 formed in the panel I. A latch member 8 secured on the stem .8 of the valve 3 is'iormed with oppositely extending arms 8 and It, the end of the arm s being provided with a beveled latch member II while the arm iii carries an electrical contact member i2.

'These members ii and i2 are adapted to co-' operate with a bi-metallic stop member or strip ll and'an electrical contact member :I I, the latter two of which members being carried by a bracket ii in turn suitably supportedmpon the valve 3. The electrical contacts i2 and I4 are suitably lnsulated from the arm l0 andbracket I! respectively.

Positioned adjacent certain 'of the gas ports 35, of the burner 2, is a pilot i! which receives a reduced supply oi gas from the valve I when the gas cock handle i8 is appropriately manipulated, 'in a manner p sently described. Two coils i9 and 20, arrange in series and positioned in proximity to the pil t I1 and bi-metal strip ll respectively, are provided, the former i'or igniting the pilot and/or main burner and the latcircuit is completed through the closing of con- Figure 3 is an end view of the valve shown in closed position with the-electric circuit open;

Figure 4 is a view similar to Figure 3 showing the valve by-pass open and the circuit closed;

; Figure 5 is an end -view 01' the valve showing the position assumed by the latch and electrical contacts when the valve is in full open position;

with the pilot lit and the circuit open; and V Figure 6 is an end view of the latch arm. Rei'errin'g'more particularly to the drawing, i

denotes the front plate or panel of a gas stove or range. For purposes of illustration the range is shown as having an oven burner 2, but it will be understood that the present invention is equalply pipe or manifold l, connects at its inner discharge end with the air and gas mi ing chamber I, 01' the burner 2, through the medium of a conduit or pipe li and at its other end is proter for heating the strip, i3, when the electric tact points i2 and it.

The hollow valve casing2l has an interior tapered. bore 22 which rotatably receives atapered valve plug 23, having therein a transverse iull flow passageway 24, adapted for registry with an inlet bore or passageway 25, formed as a part of the housing and a communicating longitudinal passageway 28 which is at all times in communication with the outlet passageway 2'I. The communicating passageways 24 and 26 oi the valve plug just reierred'to are the main passageways and are utilized when either a iull flow or a reduced flow oi a fuel is desired at the main burner.

The casing is also iorr'ned with an inwardly and upwardly extending by-pass" leading i'rom the casing inlet passageway 25 and opening into the casing bore 22 at a point inwardly spaced from the inlet passageway. An annular groove 28 formed 'in and extending almost completely around the plug is adapted to be brought into-resistry with the outletend oithe by-pass 28 for supplying 8 small-quantity 0! gas to the pilot ll. Thus the groove "20 is also adapted to place the by-pass in communication with a small transverse outlet opening or passage 80 extending through the casing wall in the same vertical plane with but spaced from the outlet end of the by-pass 20 approximately 45. A small. gas pipe 3i connected at one end to the small outlet port l l'and at its otherend to thepllot ri, supplies gasto the latter when the groove II. v-pass It and port 30 are in communication with eachother. 'Whentheburnerisnotinuse,bothcoils II and 2| are cold and the hi-metal strip It assumes a position in the path of travel of the latch member Ii, carried by the arm I, thus making it impossible to open the gas .valve 3 suflicientiy to supply gas to the main burner. However, move-.

latter position the inlet passage 24 in the plug is still out of communication with casing inlet 2,sos,ees

Q for temporarily preventing further movement of circuit is closed, and contact members associated with the valve, said contact members being closed passage 25, but by-pasfl II is in communication with the passage II and permits a small flow of gas to the pilot.- At the same time, the contacts I: and H are closed and current issuppliedto the coils I! and I! through line wire 32 leading to one end of coil II and thence through coil I! andlinewireflleadingtocoilflmountedon stop member l3. Current then passes through coil 2., loose wire 31 to and through electrical contacts I: and I4, and-thence out through wire 34, to a source of power (not shown) to complete the circuit, the coils being in series. Asboth coils become hot, the ignition coil ll lights the pilot [1, thus permitting the latter to ignit the main burner 2 when gas is supplied to the latter, while the heater coil 2| heats the bi-metallic strip causing it to move out of the pathof and permitting the bi-meta'llic strip II to cool of! and, resume its normal position in the path of movement of the latch member I l. However, when rotating the handle II in an anti-clockwise direction to close the gas valve, the beveled face ll In moving the: valve to full open a hers being opened-to break the circuit when the valve is moved to position to permit of a full flow of the latch part II rides over the onset free end of the bi-metallic strip and consequently the latch does not interfere with the closing of the valve. During the turning of the valve in a counterclockwise direction to oil position, a full now. of l fuel to the pilot ll, through the groove 2. is

assured until the main burner is completely shut off. v

To assure positive ignition of pilot I! by coil I.

I before releasing latch mechanism, resistances of coils'ie and 20 can be arranged so that cell" attains a temperature for ignition before coil 2| supplies enough heat to release the latch mechainlet passage and said main burner and a passage communicating with saidpilot to open and close passsage of fuel'from said source of supply thevalveai'terthevalvehasbeenrotatedtc position to supply iuel through one of said passages to the pilot, an ignition circuit including 'in series an ignition coil and aheating coil,-said ignition coil adapted to ignite the pilot and said heater coil adapted to heat the latch and move the same to an" inoperative'position when .the

for closing said circuit upon movement of the valve to position to supply fuel through one of the passages to the pilot, and said contact members being opened to break the circuit when the valve is moved to position to permit of a full flowrof fuel through said main'burner passage to said main burner whereby said bi-metailic latch will cool and return to operative valve latching position. i

2. An apparatus of the kind described'comprising in combination with a main burner, a pilot adjacent the burner for lighting the same, a valve having an inlet passage communicating with a source of supply, a plug rotata'bly positioned in said valve, said plug having a main burner e communicating with said valve inlet passage and said main burner and a passage communicating with said pilot to open and close passage oii'uel from said source of supply a to said main burner and pilot,a bi-metallic latch for temporarily preventing further movement of i circuit is closed, and contact members associated with the valve, said contact members being closed for closing the said circuit upon movement of the valve to position to supply fuel through one of the passages to the pilot, and said contact memof fuel through said main burner passage to said main burner whereby said bi-metallic latch will cool and return to operative valve latching position, said latch mechanism being such that movement of the valve from full iiow burner position to closed position is not interfered with;

large gasconduit and a small gas conduit lead ingi'romsaidvaivecasingtosaidburner saidpilotreapectiveimlaid aheatingcoilfor igniting saidpilotandicr heat to said main burner and pilot, a bi-metallic latch ing said bl-mgtfluc 09 member M W .-:-.5

ascaees 4 l the same to move out of the path of rotation of the pilot and separate means in said circuit said latch member when the circuit is closed and thus permitting the valve plug to be moved to full flow position with-the main burner passage communicating with the large gas conduit, and contact members associated with the valve for closing the said circuit when the valve is moved to position to supply gas through the inlet passage communicating with said source, of supply, a-rotatable valve plug in said casing, conduits leading from said valve casing to said burner and pilot respectively, said plug having a mainbumer passage communicating with said valve inlet passage and one of said conduits and a passagecommunicating with the other of said conduits adapted to open and close passage of fuel from said source of supply to said main burner and pilot, a latch to prevent said'valve being moved into a full on position to supply gas through one of the conduits to the main burner, said latch including a latch member mounted upon and rotatable with the valve plug adapted to cause said latch to move to an inoperative position when the circuit is closed and to permit return of said latch to operative position when the circuit is open, and contact members associated with the valve for closing the said circuit upon movement of the valve to position to V I supply fuel through one of the conduits to the pilot, and said contact members being opened to break the circuit. when the valve is moved to position to permit a full flow of fuel through one of the conduits to said main burner.

6; An apparatus of the kind described co prising in combination with a main burner, a pilot adjacent the burner for lighting the same, a source of fuel supply, a valve casing having an inlet passage communicating with said fuel supply, a rotary valve plug in said casing, conand a bi-metallic stop member arranged in the path of rotation of said latch member, an ignition circuit including in series an ignition coil and a heating coil for igniting said pilot and for heating said bi-metallic stop member and causing the same to move out of the path of rotation of said latch member when the circuit is closed full flow position with the main burner passage andthus permitting the valve to be moved to communicating with one of the conduits, and a contact member carried by the latch and a contact member carried by the casing, said contact members adapted for closing the said circuit when the valve is moved to position to supply duits leading from said valve casing to said burner and pilot respectively, said plug having a main burner passage communicating with said inlet passage and one of said conduits and a passage communicating with the other of said conduits adapted to open and close passage of fuel from' said source of supply to said main burner and pilot, a bi-metallic latch for temporarily preventing further movement of the valve after the valve has been rotated to position, to supply fuel through one of the conduits to the pilot, an ignition circuit for igniting the ,pilot and including I means for heating the latch to move the same to an inoperative position when the circuit is closed, and contact members associated with the a valve for closing the said circuit upon movement of the valve to position to supply fuel through one of the conduits to the pilot, said contact members being opened tobreak the circuit when the valve is moved to position to permit of a full flow of fuel through one of the conduits to said main burner whereby said bi-metallic latch will cool and return to operative valve latching position,

' '7. An apparatus of the kind described compris- I ing in combination with a main burner, a pilot gas through one of theconduits to said pilot,

and said contact members being opened to break said circuit when the valve is moved to position to permit of a full flow of gas through one of the conduits to said main burner whereby said iii-metallic stopcools and moves into position in the path of rotation of said latch member.

5. An apparatus of the kind described comprising in combination with a main burner, a pilot adjacent the burner for lighting the same, :a source of fuel supply, a valve casing having an inlet passage communicating with said source of. supply. arotatable valve plug in said casingconduits leading from said valve casing to said burner and pilot respectively, said plugfhavins a main burner communicating-with said adjacent the burner for lighting the same, a

' source'of fuel supply, a valve casing having an inlet passage communicating with said fuel supp1y, a rotary valve plug in said casing, a largegas conduit and a small gas conduit leading from said valve casing to said burner and pilot respectively, said plug having a main burner communicating with said valve inlet e and said large gas conduit and a passage 'communil eating-with said small gas conduit adapted to open and close passage of fuel from said source of supply tosaid main burner, and pilot, aletch normally operative for temporarily prevent! further movement of the valve after the valve and of said conduits and apassage communicating with the other of said conduits adapted to open and close passage of fuel from said sourceoi'supply to said main burner and pilot, latch menus adapted to prevent fur-- ther movement ofthe valve to a position to sup.-

"ply a full flowofgas to the main burneuwh'en the valve reaches the position for Supplying fuel "*flirou gh one of the conduits to'the pilot, an electrical circuit, meansin said circuit for igniting has beenv rotated to position to 'supply fuel through the small conduit to the pilot, an igni- I tion circuit for igniting the pilot and including means forv causing the latch to move to an inoperative position when the circuit is closed and said means is energized, and contact members associated .with' thevalve for closing the said circuituponmovement of the valve to position to supply fuel through the small conduit to the pilot, said contact members'being opened to break the circuit-when the. valve is moved to position to permit of a full flow of fuel through said large eonduitxto said main burner wherebysaid latch will return to operative valve latching position.

. CASPERdBTUCKINHOLfl,

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