US2085267A - Ignition device for gas burners - Google Patents

Description

.Iuine' 29, 1937. c. E. METHUDY IGNITION DEVICE FOR GAS BURNERS Filed Feb. 12, 1931 II/TII/ IIIIIIVIIIIIII Patented June 29, 1937 IGNITION DEVICE FOR GAS BURNERS Carl E. Methudy, St. mesne assignments,

Company, Cleveland, Ohio, a corporation of Ohio.

Application February 1 9 Claims. This invention relates to ignition devices for as stoves.

An object of the invention is to provide an improved ignition device for use in connection with gas stoves comprising a housing designed and adapted to enclose a constantly burning pilot light jet and having tubes opening and 'extending from the housing to positions to receive gas passing through and from the usual gas burners and to conduct the gas to the pilot light housing for ignition and to conduct the pressure wave of ignition to the gas burners, in combination with means in the pilot light housing for protecting the flame of the constantly burning pilot light jet from being extinguished by the explosive ignition of gas or otherwise in a more satisfactory manner than has heretofore been accomplished.

Another object of the invention is to provide a pilot light housing for use on gas stoves comprising a housing adapted to encase a constantly burning pilot light jet and having laterally extended tubes ,opening therefrom'for the purpose hereinafter indicated, in combination with a pair of annular discs arranged and supported within 7 the housing in a novel relationship to the jet and to the openings tothe tubes in order to protect the flame of the jet from being extinguished, and to baflie the gas entering the housing in such a way that the gas will be effectively ignited, and to cooperate with the remaining elements in such a way as to discharge the obnoxious fumes of burnt gas from the housing.

Other objects will appear from the'following description, reference being made to the accompanying drawing, in which' Fig.1 is a plan view of one form of the in-.

vention in a gas stove.

Fig. 2 is an enlarged vertical sectional view of the device.

Fig. 3 is a vertical sectional view on a plane angularly intersecting the plane of the section of Fig. 2 approximately at the center of the pilot light housing.

Fig. 4 is an enlarged'sectional view on the same line as the section of Fig. 3 showingthe pilot light housing without the bafiie discs therein.

Louis, Mo., assignor, by to The Cleveland Trust 2, 1931, Serial No. 515,150

igniting gas at the gas burners and at the oven burner. a j

As shown in the drawing, the gas manifold I is supported adjacent to the burner box 2 within which there is acluster of gas burners, such as the gas burner 3. The gas burners 3 are supplied with gas from the manifold I through pipes 4 controlled by valves 5, so that the burners 3 may be selectively supplied with gas, as is familiar.

Side walls 6 of the oven are toward the burner b0); frame. A gas burner 'l is supported within the oven and is supplied with gas through a communication 8 from the manifold l. The communication 8 is controlled by a valve 9.

The housing I0 is designed and adapted to enclose the jet H of a pilot light burner device to which gas isconstantly supplied through a pipe 12 from the manifold l controlled by a normally open valve l3. The jet l I is centered in the lower portion of the housing I0 by spaced lugs I 4 integral with the lower. end of the wall of the housing and projecting inwardly. These lugs M are spaced so as to provide openings through which air may freely enter the lower end of the pilot light housing in order to supplythe air necessary to prevent the pilot light jet flame l5 from being extinguished.

The housing ll] opens into a number of tubes I 6 which project toward the respective burners 3 and have flanges l8 on the under side of their outer ends arranged to seat upon projections I9 from the respective burners 3. Fingers 20 at the outer ends of the respective tubes l6 embrace the adjacent projections l9 between them. In this way, the pilot light housing is supported in cooperative relation to the burners 3, so that gas passing from said burners through the laterally disposed gas outlets 2| will necessarily enter the respective tubes l6 and pass therethrough into the housing. This is because the openings 2| are opposite the open ends of the tubes l6, so

that gas passing from said openings 2i must necessarily enter the tubes, These holes 2| are provided specially and in addition to the holes 22 in the upper walls of the burners 3. It is necessary only to provide one of the special holes 2| in each burner.

The housing In is formed with an internal shoulder 23'immediately below the openings into the tubes I6. The annular disc 24 is mounted -in the housing I ii on the shoulder 23 and the opening 25 through said disc 24 is surrounded by an upwardly extended flange 26 that tapers upwardly. The jet l4 is'below the plate 24 and the constantly burning flame l6 extends through the opening 25 to a height above the flange 26. This disc 24 located pn the shoulder 23 below the openings to the tubes |6 prevents the gas en- 5 tering the housing l3 from the tubes l6 from passing downwardly, and the flange 26 shields and guards and protects the flame I6 from the effects of the ignition waves or gusts created as an incident to ignition of gas entering the housing I0 10 through any of the tubes I6.

The housing ID has an internal shoulder 21 above the shoulder 23. The shoulder 2ll intersects thetubes I6 approximately at the axis of said tubes, it being apparent that in the embodiment shown the openings to all of the tubes l6 are approximately in the same horizontal plane. A flaring annular plate 26 is mounted on the shoulder 21, the opening 23 through said plate being in vertical axial alinement with the openmg 25 and surrounded by an upwardly tapered flange 30. The opening 29 is of larger diameter than the opening 25 and the flange 33 is of greater length than the flange 26. It is unnecessary that the constantly burning flame l5 extend 25 normally above the upper edge of the-flange 30 in order to maintain the device in successful operation. I L

A tubular extension 3| opening from one side of the housing It is provided on its end with a v 30 bell 32 designed and adapted to receive one end of the tube 33 having its opposite end opening into a burner housing 34 having communication through a pipe 35 with the pipe 8 and with the burner I through a tube 36. Thus, gas may be conducted into the housing HI through the tube 33 and the connections for supplying gas to said tube.

The housing it may be formed with a number of vent'opem'ngs 31 intersecting the disc 28 in order to supply enough air to meet any requirements.

A cover plate 36 telescopes upon the upper end of the housing In and is provided with a large central opening 39 and an annular series of openings 46 to permit free escape of burnt gases and products of combustion in order to maintain the device in perfect operation.

This device is designed and adapted to be mounted in cooperative relation to a cluster of gas burners 3, witha constant supply of gas to the jet II, which hasa constantly burning flame I5, to consume constantly the small amount of the baflle plate 24. A part of the gas entering] the housing l3 will pass below the battle plate'28.

The gas coming into contact with or in proxim-.

ity to the flame l5 within the pilot light housing III will be ignited and the pressure wave of ignition will be deflected outwardlyithrough the gas filled pipe |6 by the curved lower surface of the baflie plate 28. The pressure wave of ignition is directed above the upper wall of the burner 3 into contact with the gas emerging from the holes 22 with the result that the gas emerging from all of said holes 22 is ignited. Also, the gas emerging from the hole 2| is ignited.

The jet flame I5 is guarded and shielded and protected by the baflie plate-24 and the upwardly curved flange 26. The jet flame I5 is thereby thoroughly shielded and guarded and protected from any subsequent inrush of air, so that said flame I5 is not extinguished.

Since the edges of the plate 26 intersect the openings to all of the pipes l6 as well as to the tube 3| and also the vent openings 31, said baffl plate 28 does not cause any or the obnoxious gases resulting from the combustion oi. the gas to be retained in the housing It; but, on the contrary, said 'baflle plate 28 causes all of the obnoxious gases to be discharged. This is because fresh air may enter the housing l3 above and below the baifle plate 23 so as to carry all burnt gases and products of combustion from the housing l6. It is now clear that my invention obtains all of its intended objects andpurposes in a most eflicient and satisfactoiymanner. The construction, arrangement and relationship of the parts may be varied within the scope of equivalent limits without departure from the nature and principle of the invention.

I claim:--

1. In a device of the character described, a

housing having a lateral opening, a jet within said housing below the plane of the bottom of said opening, and a horizontal baiile plate intersecting said opening'and having a central opening above said jet and above the normal height of the flame of the jet.

'2. In a device of the character described, a

housing, a pipe opening into said housing for conducting gas into said housing and for conducting the pressure waveof ignition of said gas from said housing, a jet within said housing, a bafile plate in said housing intersecting the opening to said pipe andhaving a central opening above said jet and above the normal height of the flame of said jet, and a-baflle device in said housing below the opening to said pipe and havintegral with said plate around said opening therethrough extending above the bottom wall of the opening to said pipe, an annular plate. supportedin said housing and intersecting the opening to said pipe, and an upwardly extended flange around the openingin saidannular plate extend-' ing upwardly above the plane of the-top oi the opening to said pipe.

4. A device oi the character described com-- prising a housing, a Jet within the lower end of said housing, means holding said housing and said jet in properly spaced relationship and forming openings-admitting air into the lower end of the housing, a pipe 'openingirom said housing, a bafiie'plate in said housing below the opening to said pipe and having a central opening above said jet, an upwardly tapered flange surrounding said opening in said baflle plate and extending above the lower side of the opening to said pipe, an annular baflle plate supported in said housing and intersecting the opening to said pipe, and-an upwardly tapered flange surrounding, a jet in the lower portion of said housing, an annular baffle plate in said housing below the opening to said pipe and below, said air inlet opening, an upwardly tapered flange siu'rounding the opening through said annular ballle plate,v a second annular baflle plate in said housing intersecting the opening to said pipe and said air inlet opening, and an upwardly tapered flange surrounding the opening through said second baflle plate.

6. In a device of the character described comprising an open top pilot light housing having one or more flash-back tubes extending from the sides thereof, and a pilot light enclosed by the housing whereby to ignite gas conducted into the housing through said tubes, a baflie in said housing having an opening provided therein for projection therethrough of the flame oi the pilot light, the baille having the opening therein defined by an upwardly projecting annular flange so disposed with relation to the flame of the pilot light as to leave only the tip of the flame exposed above the same in the housing, whereby to protect the main portion of the flame from concussion produced in the tubes.

7. In a device of the character described comprising an open top pilot light housing having one or more flash-back tubes extending from the sides thereof, and a pilot light enclosed by the housing whereby to ignite gas conducted into the housing through said tubes, a bame in said housing having an opening provided therein for projection therethrough of the flame of the pilot light, the indie having the opening therein deflnedby an upwardly projecting annular flange so disposed with relation to the flame of the pilot light as to leave only the tip of the flame exposed above the same in the housing, whereby to protect the main portion of the flame from concussion produced in the tubes, and said baflle being furthermore so disposed so that the flame of the pilot light projects substantially centrally through the flanged opening whereby to produce a nozzle efl'ect to draw in secondary air for the flame to support combustion.

8. In a device of the character described, an ignition means including a housing having an opening through its top wall, a jet within said housing, a horizontal baiile plate below said top opening and having an opening above the nor-, mal height of the flame of said jet, and a horizontal baflle plate below the other plate situated in the normal path of the flame of the jet and having an opening above the jet and below the normal height of the flame of said jet.

9. In a device of the character described, ignition means for igniting a gas stream including a flxed jet for supporting a gas pilot flame, and a member having an opening provided therein for projection therethrough of the flame of said Jet, said member having the opening thereof defined by an upwardly and inwardly projecting annular flange so disposed with relation to the flame of said'jet as to leave only the tip of the flame exposed above the same, whereby to protect the main portion of the flame from concussion produced by the ignition of the gas stream, said member being so disposed that the pilot flame projects substantially centrally through said opening whereby to produce a nozzle effect to draw in secondary air for the flame to support combustion. D

CARL E, MEI'HUDY.

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