US2010955A - Ignition device - Google Patents

Description

Aug. 13, 1935. 0. J. LEINS IGNITION DEVICE Filed April 30, 1930 Patented Aug. 13, 1935 UNITED STATES PATENT OFFICE IGNITION DEVICE Application April 30, 1930, Serial No. 448,604

9 Claims.

This invention relates to certain new and useful improvements in ignition devices and refers more particularly to means for igniting hydrocarbon or gas burners and the like from a pilot '5 light, especially where the burners are located remote from the pilot light and beyond the normal reach of the flame projected therefrom.

It is, therefore, an object of this invention to increase the length of a flame projected from a 10. pilot light and thus enable a conventional lighter of the type providing ignition for the cooking section burners of a gas range, to also provide safe ignition for an oven burner and/or any other burner located beyond normal reach of a flame 15 projected from the pilot light.

A more specific object of this invention resides in the provision of an auxiliary fuel supply adapted to feed a flame projected from a pilot light and thereby increase its effective length.

20 With the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly deflned by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

In the accompanying drawing, I have illus- 30 trated one complete example of the physical embodiment of my invention constructed according to the best mode I have so far devised for the practical application of the principles thereof, and in which:

35 Figure 1 is a top plan view of a portion of a conventional gas range illustrating the application of my invention thereto;

Figure 2 is an enlarged sectional view taken through Figure 1 on the plane of the line 2-2;

. and

Figure 3 is a transverse sectional view taken through Figure 2 on the plane of the line 33.

Referring now more particularly to the accompanying drawing, in which like numerals desig- 45 nate like parts throughout the several views, the numeral 5 represents the oven of a conventional gas range and 6 the cooking section thereof. As is customary, the cooking section has a number of burners I which are adapted to be connected 50 with a fuel supply through a stringer pipe 8 upon opening of their respective valves or cocks 9. The oven is provided with a burner In of any suitable design which is also adapted to be connected with the stringer pipe upon opening of its associated cock ll.

To provide ignition for the burners I, a centrally located pilot I! at which a small pilot flame continually burns, is connected with the stringer pipe I through a tube l3 and a valve H. The valve 14 is of the conventional push button type 5 having a by-pass permitting sufllcient fuel to flow to the pilot to maintain the small pilot flame and is adapted upon depression of its push button ii to suddenly increase the volume of fuel flowing to the pilot to project flames diagonally therefrom toward the various burners.

The specific structure of the pilot is best illustrated in Figures 2 and 3 and includes a substantially T shaped valve casing l6 threaded on the adjacent end of the tube l3. A short stem 5 I1 is threaded into an aperture in the valve casing it which communicates with the opening in which the tube I3 is threaded, to receive fuel entering the casing through tube l3 and conduct the same upwardly to a pilot tip l8 which is secured to the upper end of the stem 11. The tip I8 is of suitable construction depending upon the nature of the fuel and is provided with a plurality of orlflces i9 arranged radially in line with the various burners i and from which the igniting flames project. As disclosed in my Patent No. 1,747,015, the pilot also includes a hood 20 which is readily detachably connected ,with a base 2! suitably flxed to the stem H. The

hood 2|! has a plurality of openings 22 axially aligned with the orifices l 9 to permit the igniting flames to project therefrom.

To supply ignition for the oven burner ill, the pilot tip l8 has an opening 24 in axial alignment therewith to receive and support the adjacent end of a tube 25 into which a flame is projected simultaneously with the projection of the flames toward the burners 'l. The opposite end of the tube 25 passes through a suitable opening in the oven wall and terminates adjacent the oven 4( burner.

It is, therefore, apparent that a flame projected into and continuing through the tube 25 will ignite-the fuel issuing from the oven burner ports 26, but as a flame projected from the pilot tip i8 normally cannot reach the outer end of the tube 25 and the oven burner, means are provided for increasing the effective length of the flame projected into the tube to insure positive and continuous flame travel to the extreme end of the tube.

This means consists of an auxiliary fuel supply, which upon projection of a flame into the tube feeds fuel to the flame. To this end, the valve casing l6 has a port or passageway 21 leading from the opening into which the tube It is threaded to the lower end of a substantially vertical bore 28. The bore 2! forms a small well whose upper end is normally closed by a ball check valve 29 received in an enlarged bore 30 projected downwardly from the top of the valve cas ng in axial alignment with the bore 20. Communicating with the inner end of the bore 30 is a port II and an internally threaded opening 32 into which one end of a tube 33 is secured. The outer end of the tube 33 is directed upwardly. as at 34, and enters the tube 25 at a point to which the flame projected from the pilot reaches.

The outer end of the bore 30 in the valve casing, is closed by a suitable cap 35 having a threaded central bore in which the screw 36 is adjustably secured to providea stop engageable with the ball check valve 29 to limit its movement from its seat.

During the normal condition of the pilot when but a small flame is burning, the check valve.

maintains itself seated by gravity and closes oi! the supply of fuel to the tube 33, but immediately upon depresion of the push button It, to flash the pilot flames, the increased volume of fuel lifts the ball check valve and permits fuel to pass through the tube 33 and into the tube 25 to feed the flame projected therein and thus increase its length sumciently to extend from the pilot tip to the oven burner.

It is noted that the tube 25 is provided with a longitudinal slot 31 at its bottom. This permits a circulation of air into the tube and insures positive and continuous flame travel through the tube.

From the foregoing description taken in connection with the accompanying drawing, it will be readily apparent to those skilled in the art to which an invention of the character described appertains, that I provide a novel and safe means for igniting a burner or burners located beyond the normal reach of a flame flashed from a pilot light. It is also obvious that this manner of providing ignition is not limited to the gas range oven burners, but may be readily adapted to many other installations such as waterheaters and other appliances whose burners are located adjacent to but beyond the normal reach of a flame projected from a pilot light.

What I claim as my invention is:

1. In combination with a'hydrocarbon burner or the like, an ignition device including a pilot, means for projecting a flame from the pilot towards the burner, means for conducting the flame from the pilot toward the burner, means commu nicating with said conducting means for conveying auxiliary fuel to the flame intermediate the pilot and the burner, and means responsive to the operation of said flame projecting means for supplying auxiliary fuel to the conducting means.

2. In combination with a hydrocarbon burner or the'like, an ignition device including a pilot, means to project a flame from said pilot toward the burner, means for conducting the flame from the pilot toward the burner, said flame being of insuiflcient length to reach the burner, means forming a passageway for conducting auxiliary fuel to said last named means intermediate the pilot and the burner, and valve means responsive to the operation of the flrst named means for controlling the passage of fuel through the passageway.

3. In combination with a hydrocarbon burner or the like, an ignition device including a pilot, means for projecting a flame fromthe pilot toiliary fuel to said flame at a point intermediate the ends of said tubing.

' 5. In combination with a hydrocarbon burner or the like, an ignition device including a gas supply pipe, operable means in'said supply pipe to permit a flow of gas therethrough at a low and at a high velocity, 9. connection at one end of said supply pipe having two branches, a pilot supplied with gas from one branch of said connection and positioned to emit a flash toward the burner upon gas flowing thereto through the supply pipe at the high velocity, a pipe connected to the other branch of said connection and terminating intermediate the pilot and the burnof the flash to increase the effective length thereof.

6. Incombination with a hydrocarbon burner or the like, an ignition device comprising a gas supply pipe, operable means in said supply pipe to permit a flow of gas therethrough at a low and at a high velocity, a connection at one end of said pipe having two branches, a pilot supplied from one branch of said. connection and positioned to emit a flash toward the burner upon gas flowing thereto through the supply pipe at the high velocity, a secondpipe connected to the other branch of said connection and terminating intermediate the pilot and the burner, a valve in said other branch adapted to be automatically opened in response to the-flow of gas to the pilot at the high velocity to admit gas to said second pipe and into the path of said flash, said valve normally being closed to prevent gas from flowing through said second pipe, and means to regulate the degree of opening of said valve to determine the volume of gas flowing through said second pipe.

'7. In combination with a hydrocarbon burner or the like, an ignition device comprising, a gas supply pipe, operable means in said Supp y Pipe to permit the flow of gas therethrough at a low and at a high velocity, a connection at one end of said pipe having two branches, a pilot supplied with gas from one branch of said connection and positioned to emit a flash toward said burner upon gas flowing thereto through said supply pipe at the high velocity, a housing for said pilot, a tube leading from said pilot housing to the burner to enclose the flash from the pilot, a second pipe connected to the other branch of said connection and leading into said tube at a point intermediate the pilot and the burner, and means in said other branch automatically operable in response to the flow of gas through said supply pipe at the high velocity to admit gas to said second pipe, and into the path of the flash travelling therein.

8. In combination with a hydrocarbon burner, an ignition device including a gas supply pipe, operable means in said supply pipe to permit a flow of gas therethrough at a low and at a high velocity, a pilot connected with said supply pipe receiving sufficient gas at low velocity to maintain a pilot flame and positioned to project a flame toward the burner upon gas flowing thereto at the high velocity, means to conduct gas from the supply pipe to a point in the path of the projected flame at a distance from the pilot, and means normally shutting off communication between the supply pipe and said means to conduct gas to the flame and automatically operable in response to the flow of gas through the supply pipe at the high velocity to admit gas to said conducting means and into the path of the flame to increase its efiective length.

9. In combination with a hydrocarbon burner, an ignition device including a gas supply pipe, operable means in said supply pipe to permit a flow of gas therethrough at ahigh and at a low velocity, 2. pilot tip connected with the supply pipe receiving sumcient gas therefrom at low velocity to normally maintain a small flame thereat and positioned to admit a flash toward the hydrocarbon burner upon gas flowing thereto at the high velocity, means communicated with said supply pipe to conduct gas to a point spaced from the pilot tip and in the path of the projected flash, and a ball valve normally seated by gravity on a valve seat in said conducting means to close the same and adapted to be lifted from the seat to open said conducting means in response to the flow of gas through the supply pipe at high velocity to admit gas to said conducting means and into the path of the flash to increase its effective length. r

OSCAR J. LEINS.

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