US2878862A - Ignition devices for gas burners x - Google Patents

Description

Miami 24, 1959 B. L. MATT EWS m1, 2,878,862

IGNITION DEVICES FOR GAS BURNERS.

Filed April 30, 1956 INVENTOR. Bmcmna L; MA rn/e'ws Iowan: .1 ZAHYJA/ICKY A! rro PM: vs

IGNITION DEVICES FOR GAS BURNERS Birchard L. Matthews and Edward J. Zarybnicky, Cleveland, Ohio, assignors to The W. J. Schoenberger Company, Cleveland, Ohio Application April 30, 1956, Serial No. 581,607 4 Claims. (Cl. 158-115) stop means being provided to limit the swinging movement of the shield when the gas burner is removed from the gas appliance.

Moreover, the invention provides means for aligningv and supporting the free end of the shield when reassembling the gas burner.

. The above objects and advantages have been accomplished by the device shown in the accompanying drawings, of which:

. Fig. 1 is a side elevation, partly in section, of a gas burner equipped with the invention;

Fig. 2 is an enlarged fragmentary plan view of the form of invention of Fig. 1;

Fig. 3 is an exploded isometrical perspective view of the pilot fitting and shield;

' Fig. 4 is a reduced sectional view taken on line IV--IV of Fig. 2;

Fig. 5 is a. fragmentary plan view of a modified form of the invention; a g

, Fig. 6 is an exploded view of the form of device shown in Fig. 5; and

Fig. 7 is an exploded view of another modification of "the inven'tion.-

i Referring now to the forms of device shown in Figs; 1 to 4, inclusive, 10 represents a gas burner which is carried by a mixing tube 11 and supplied with gas through a valve 12. The valve 12 is provided with the usual actuating handle 13 and is supplied with gas from a gas supply pipe 14.

The ignition port fitting 15 which is permanently attached to the gas burner head is provided with a fluted stem portion 16 for insertion in a suitable aperture 20 formed in said head and preferably at the rear thereof whereby the fitting will be supplied with gas mixture when the gas burner is turned on.

This fitting is formed with coaxial passages 21 and 23 and with a lateral passage 22 formed in the head 24 of the fitting and in communication with the lateral passage thereof. A slot 25 is formed in the fitting head which opens into the passages 22 and 23, whereby, when the fitting is supplied with gas from the main burner, a stream of gas mixture will be projected rearwardly from the passage 23 and upwardly from the passage 22 and slot 25 in a manner to be hereinafter described.

Arranged in rear of and in spaced relation with the fitting is a pilot tube 26 which is connected at its closed end to a T-fitting 30. The

T-fitting is secured to a suitable support 31 carried by the stove structure (not shown) and it is fed with gas through a pilot supply pipe 32 which is connected to the gas supply pipe 14 through a filter 33. An adjusting screw 34 is carried by the filter for regulating the amount of gas supplied to the T-fitting 30. The pilot tube 35, shown in fragmentary manner in i Fig. 1, is carried by the T-fitting and is for supplying the pilot burner of an additional gas burner (not shown). Each of the pilot tubes is provided on its free end with a small nozzle 36 having a relatively small passage for supplying gas to a permanently ignited small ignition flame 40 shown in Fig. 1. The pilot tube is preferably so located that its axis is below the axis of the passage 23.

So as to protect the flame of the pilot nozzle from being extinguished, a shield 41 is placed about the end of the tube and nozzle. The forward end of this shield may be formed with two oppositely spaced arms 42 which are removably attached to the head 24 of the fitting by means of inwardly extending teats 43 which engage dimples or indentations 44 formed one at each side of the head. As clearly shown in Fig. 2, spaceis provided between the arms andv the side faces of the head so that the teats will have definite engagement with the dimples, whereby the shield will be pivotally attached to the fitting. The endsurfac es 45 of the arms are spaced slightly from the flange 46 of the fitting, as clearly shown in Figs. 1 and 2, whereby as the shield is pivoted about the engaged teats" and dimples, 'the lower portions of the abutment surfaces 45 will engage the flange 46 of the fitting when the burner is removed from the stove, and limit the downward movement of the outer end of the shield, as clearly shown in dotted lines in Fig. 4. Consequently, when the burner 10 is removed from the gas valve, the shield will be removed with it and will be maintained in such position that when reassembling the gas burner, the shield will readily engage the pilot tube 26 and support the rear end thereof. In order that the back end of the shield will readily register with the pilot tube, it is provided with inwardly bent tabs 50 which form an inverted V-shaped opening 51 for engagement with the tube.

Referring now to the form of invention shown in Figs. 5

and 6, the shield 52 is supported by a fixed yoke 53. The yoke has rearwardly extending tabs 54 in each of which fitting is passed before insertion in the opening 20 of the burner.v This yoke isdisposed behind the flange 46 of. the-fitting 15 .whenithis fitting is assembled. The s'hieldin this form of invention is provided with forwardly extending arms 56 each being formed in its outer end with an outwardly projecting button 60 which engages the aperture 55 in each of the arms 54 of the yoke. The ends 57 of the arms 56 and the position of the apertures 55 in the yoke are so proportioned that the shield will have a limited amount of swinging movement when the burner carrying it is removed from the gas appliance.

In the form of invention shown in Fig. 7, the yoke 61 is attached to the burner in a manner similar to the form of invention shown in Figs. 5 and 6. This yoke is formed with a central opening 68 and with two rearwardly extending arms 62 in each of which is formed a vertical slot 63. The shield 64 of this form is provided with forwardly extending arms 65 on the upper end of each of which is formed an outwardly extending tab 66 which, when assembled with the yoke, engages each of the slots 63 of the yoke. The end 67 of these arms will bear against the yoke when the gas burner is removed from the appliance thereby limiting the downward movement of the shield.

From the foregoing, it will be obvious that the pilot Patented Mar. 24, 1959 I flame 40 will be constantlybuming and that when the gas valve 12 is turned on and a gas mixture is supplied to the burner 10, gas will flow through the ignition port fitting and out of the axial passages 21 and 23, lateral passage 22 and'slot 25. The gas projected through the axial passages will be ignited by the pilot flame 40 which in turn will ignite the gas flowing upwardly through the passage 22 thereby igniting the gas issuing from the gas burner.

It will also be clear from the foregoing that when the burner with its mixing tube is removed from the gas appliance for cleaning, the shield of either form of invention will be lifted from the supporting pilot tube and be removed from the stove with the burner. If desired for cleaning purposes, the shield may be removed from the pilot fitting or from either of the yokes at will. When the burner is to be replaced within the gas appliance, the shield having been attached to the burner, it will be readily aligned and be supported by the pilot tube as the burner is brought to its final position.

While we have shown a number of forms of our invention, it is obvious that other forms may be employed, and we do not wish to be limited to the exact embodiment herein shown and described.

What is claimed is:

l. The combination with a gas burner, of an ignition device, comprising ignition port means carried by said burner, said port means being formed with an upwardly extending lateral passage and with a rearwardly extending axial passage in communication with said lateral passage and with the mixing chamber of said burner, a pilot burner having a horizontally arranged pilot tube disposed adjacent said port means, means for supporting said tube, a nozzle carried at the outer end of said tube and in communication therewith, said nozzle being positioned so as to project its flame toward said port means, means for supplying gas to said tube, a pilot burner shield disposed about the outer end of said pilot tube and saw ing at one end outwardly extending arms for pivotal engagement with said port means, and the other end of said shield being freely supported by said pilot tube.

2. The combination with a gas burner, of an ignition device comprising ignition port means carried by said burner, said port means being formed with an upwardly extending lateral passage and with a rearwardly extending axial passage in communication with said lateral passage and with the mixing chamber of said burner, a pilot burner having a horizontally arranged pilot tube disposed adjacent said port means, means for supporting said tube, a nozzle carried at the outer end of said tube and in communicatiton therewith, said nozzle being positioned adjacent to said port means, means for supplying gas to said tube, a pilot burner shield having outwardly extending arms, means for pivotally attaching said arms to said port means, and each of said arms being formed on its end surface with abutment faces spaced from and engageable with said port means for limited rotation of said shield about its pivots.

3. The combination with a gas burner, of an ignition device, comprising ignition port means carried by said burner, said port means being formed with an upwardly extending lateral passage and with a rearwardly extending axial passage in communication with said lateral passage and with the mixing chamber of said burner, a pilot' burner having a horizontally arranged pilot tube disposed adjacent said port means, means for supporting said tube a nozzle carried at the outer end of said tube and in communication therewith, said nozzle being positioned so as to project its flame toward said port means, means for supplying gas to said tube, a pilot burner shield disposed about the outer end of said pilot tube and fully supported by said port means and said pilot tube, said shield having a closed upper body portion and oppositely arranged spaced arms each formed with an inwardly extending teat, and said port means being formed with a dimple in each of its opposite sides for pivotal engagement with the teats of said arms.

4. The combination with a gas burner, of an ignition device, comprising ignition port means carried by said burner, said port means being formed with an upwardly extending lateral passage and with a rearwardly extending axial passage in communication with said lateral passage and with the mixing chamber of said burner, a pilot burner having a horizontally arranged pilot tube disposed adjacent said port means, means for supporting said tube a nozzle carried at the outer end of said tube and in communication therewith, said nozzle being positioned so as to project its flame toward said port means, means for supplying gas to said tube, a pilot burner shield disposed about the outer end of said pilot tube and supported by said port means and said pilot tube, said shield having a closed upper body portion and oppositely arranged spaced arms each formed with an inwardly extending teat, said port means being formed with a dimple in each of its opposite sides for pivotal engagement With the teats of said arms, and each of said arms being formed on its end surface with abutment faces spaced from and engageable with said port means for limited rotation of said shield about its pivots.

References Cited in the file of this patent UNITED STATES PATENTS

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