US1954921A - Gas igniter - Google Patents

Description

Patented Apr. 17, 1934 UNITED STATES PATENT OFFICE.

I Application ianuary 20,

1933, Serial No. 852,703

2 Claims. (01. 175-115) Thisinvention relates to a gas igniter for use in connection with the burner of a range, beatem and the like, and in accordance with the present invention an igniter of the character above mentioned is provided which is automatic in operation and which will positively insure the igniting of the gas at the burner whenever the burner is turned on accidentally or otherwise.

The invention together with its numerous eb- Jects and advantages will be best understood from a study of the following description, taken in connection with the accompanying drawings wherei z plication of the invention to a burner forming part of a gas range.

Figure 2 is a sectional elevational view showing the arrangement of the switch forming part of the device. 1

Figure 3 is a fragmentary sectional eleva tional view of the insulated plate and fixed contact forming part of the aforementioned switch.

' Figure 415 a fragmentary sectional elevational view showing the wedge means for automatical- 5 1y breaking the circuit subsequent to the igniting of the gas at the burner.

Figure 5 is an end elevational view of a bracket having mounted thereon an electro-magnet and other elements to be hereinafter more fully referred to and forming part of the igniter.

Figure 6 is a sectional elevational view showing the parts in position subsequent to the automatic breaking of the circuit, and

Figure '7 is a diagrammatic view of the wiring system.

Referring to the drawings by reference numerals 5 designates the frame of a gas range or stove, the frame being shown fragmentarily. The grid is designated generally by the reference character 6, while 7 indicates the burner, 8 the gas supply pipe, 9 the branch connecting the pipe 8 with the burner '7 and 10 the valve incorporated in the branch 9 to control and regulate the supply of gas to the burner. All of the 'construction thus far described is conventional and further details thereof are deemed unnecessary.

In accordance with the present invention there is suitably supported on the frame 5 through the medium of a bracket 11 a shield 12 which has a portion thereof extending over a part of the burner '1 in a manner clearly shown in Figures 1, 2 and 6. Mounted within the shield 12 is a bracket 13 which supports an electro-magnet 14. One side of the magnet 14 is in electrical con- Figure 1 is a top plan view showing the ap-' nection with a fixed contact 15 through the medium of the wire 16. The aforementioned contact 15 forms part of a switch 8 to be hereinafter more fully referred to. The other side of the magnet 14 is electrically connected with an no armature 17 suitably mounted on the shield 12 and insulated therefrom as at 18. The armature 1'7 is arranged in operative position to the core of the magnet 14 and is also located adjacent the topof the shield 12.

The aforementioned magnet 14 and armature 17 form'part of a sparking or igniting device which also includes a contact carried by the armature 17 and engageable with a fixed contact 19 suitably mounted on the shield 12 and connected with a ground wire 20.

The magnet 14 is arranged in circuit with a battery B and to the positive side of the battery B is connected the movable contact 16a of the switch S.

From a consideration of Figures 6 and 7 it will be seen that when the switch S is closed the magnet 14 is energized thus drawing its armature 17 downwardly to separate the contact 19 on shield 12 and the contact on the armature 17.. An arc spark is thus caused between the contact 19 and the contact of the armature 17 resulting in a lighting of the burner 7 provided of course that the valve 10 is in an open position.

Means is provided for automatically operating 35 theswitch S, and in the present instance such means consists of a shutter 21 arranged in the branch 9 and having as a part thereof a shaft 22 suitably joumalled in the top wall of the branch and having an end extending outwardly and provided with an arm 23. Suitably mounted on the arm 23 and insulated therefrom is the movable contact 16a. of said switch. Suitably mounted'on the branch-9 is a bracket 24 of insulating material and carried by the bracket 24 is the 5 fixed contact 15 of the said switch S. It will thus be seen that when the valve 9 is open and gas flows from the supply pipe 8 through said branch to the burner, that the pressure exerted thereby on the shutter 21 will cause the same to swing to the position shown in Figure 6 resulting in movement of contact 16a. into engagement with contact 15 thus closing the circuit to the magnet 14 for swinging the armature 1'7 downwardly to separate the contact carried thereby and contact 19 to provide a. spark gap between the contacts for igniting the gas at the burner.

Arm 23 and shutter 21 are normally urged to rotate in a clockwise direction through the medium of spring 25.

The vanes 6a of the grid 6 at their inner ends are provided with dovetail slots 26 to accommodate a thermal ring 27. The expansion ring 27 at one end is anchored in any suitable manner as at 28, and the other end of the ring formed by the split in the ring, is extended downwardly to provide an arm 29 that extends through a slot 30 in the hood orshield 12. At its free end the arm 29' is provided with a. wedge shaped extension 31 that is adapted to wedgedly fit between the armature 17 and the top of the shield 12 to flex the arm 17 downwardly for separating the contact 19 and the contact carried by the armature 1'7.

It will thus be apparent that ring 26 will be caused to expand by the heat from the burner 7, and upon expansion of the ring the wedge 31 will be forced inwardly between the top of hood 12 and armature 17 for flexing the armature downwardly and thereby separating the contact 19 and the contact carried by the armature thus breaking the circuit and preventing undue burning of the just mentioned contacts, as well as waste of electric energy.

The purpose of the hood 12 is to protect the magnet 14, armature 17, the contact associated with the armature, and contact 19 from materials that may be spilled or may boil over, such as soups and the like.

There is also provided on the burner -'7 a. baffle 32 that is arranged adjacent one end of the shield 12 and serves to prevent those perforations of the burner that are disposed substantially beneath the shield 12 from becoming clogged, and thereby insure efllcient emission of gas from the burner at a point in proximity to the contact 19 and armature 17 for igniting purposes.

Even though I have herein shown and described the preferred embodiment of the invention, it is to be understood that the same is susceptible of further changes, modifications and burner and a grid mounted above said burner of an igniting device arranged in operative position to the burner and including a fixed contact, an electro-magnet, a pivoted armature adapted to be attracted by said magnet, a contact on the armature normally engaged with said fixed contact, a switch for controlling the supply of current to said magnet, a thermal ring mounted on said grid and having an arm extending downwardly in operative position to said armature, and providedwith means for engaging the armature to flex the same downwardly for separating said contacts upon expansion of said thermal ring.

2. In-an igniter of the class described, a fixed contact, a pivotally mounted armature provided with a contact normally engaged with the fixed contact, electro-magnetic means arranged in operative position to the armature for attracting the latter for separating said contacts in a manner to cause an arc spark between said contacts, and thermal means engageable with said armature for separating said contacts independently of said electro-magnetic means.

LEON C. DANIELS.

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