US2008320A - Igniter for domestic oil burner - Google Patents

Description

July 16, 1935. L. J. CARON IGNITER FOR DOMESTIC OIL BURNERS Filed March 30, 1931 l atentecl July 16, I935 UNITED STATES IGNITER FOR. DOMESTIC OIL BURNER. Ludger J. Caron, Leominster, Mass, assignor to The Alaska Freezer 00. 1110., Winchendon,

. Mass, a corporation of Massachusetts Application March 30,

6 Claims.

The principal objects of this invention are to provide an electric igniter suitable for use in domestic oil burners which will not require as much expense to install as in a construction where a spark is used and which will cooperate with the burner so as to start the flame and yet not be in a position to be injured materially by the flame.

Other objects and advantages of the invention Will appear hereinafter.

Reference is to be had to the accompanying drawing, in which Fig. l is a plan of a domestic burner having an igniter constructed in accordance with this invention, and

Fig. 2 is a sectional view on the diametrical line 2-2 of Fig. 1.

I have shown the invention as applied to a well known type of domestic burner comprising a base It? in the form of a casting adapted to be placed in a kitchen range in place of the grate. This base has shoulders arranged concentrically and perforated metal walls l I supported by them. The flame is intended to burn in a trough [2 in the casting or base 16. This trough is shown as annular and open at the top. Underneath this trough is an electric preheating unit i 3 which is adapted to heat the oil primarily for the purpose of forming some vapors from it. The liquid fuel is introduced into the burner through a supply pipe l l which entersthe bottom of the trough 12.

The igniting element consists of one or more coils H) of bare wire of such a metal or composition as is adapted to glow when heated by an ordinary current of electricity. In this case two of these coils are arranged concentrically and each in the trough l2 but located at one side, preferably the inner side. Upon heating to m candescence they ignite the fumes from the liquid fuel in the trough which burns in the center of the trough. Thus the coils escape the maximum action of the direct heat on them.

The wiring for this burner is very simple. One terminal [5 of the wire, coming from the power, is connected by an ordinary electrical connector or binder IT with one end of one of the coils [5 of bare wire. The other end of this coil, through a similar connection H is connected by a wire [8 with another connection Il The other wire I5 is in circuit with the connection ll and has a similar connection ll at its other end. The wire I9 leading from this last connection goes to the heating unit l3 through which it passes. and then through a wire 20 to the other terminal 2|. In this Way it will be seen that the electricity is 1931, Serial No. 526,295

conducted throughout the device inseries, connecting up the two igniting coils and the preheating units so that when one of them is connected up all will be.

The igniter is suitable for use with domestic burners and is located within the trough l2 preheated by the coil IS so that the fumes will rise and these fumes are ignited by the coils !5. As soon as ignited the electric current can be turned off.

It will be seen therefore that the preheating unit is combined with the ignition device in such a way that they always work together but it is to be understood that this igniting device can be used without any preheating device and that it will work with ordinary fuel oils, which is vaporized by the igniting coil. As the oil reaches the hot coil it forms a vapor and ignites.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. A hydrocarbon burner having a chamber to which liquid fuel'is supplied, and an electric heating element disposed in said chamber in heat radiating relation to the liquid fuel but entirely above the normal level of the fuel and out of contact therewith and outside the zone of normal combustion of the burner.

2. A combustion tube burner comprising a trough, means to supply liquid fuel thereto, a perforated combustion tube on said trough, an electric heating element disposed in said trough, and means for electrically insulating said element from the burner and to support the same adjacent the bottom of the trough' above the level of the liquid fuel therein, and below the level at'which combustionnormally takes place, said element being operable to vaporize the fuel and to ignite it as it is vaporized when initially supplied to said trough.

. 3. A combustion tube burner comprising a base member having a horizontally "disposed trough, and a perforated combustion tube thereabove, means to supply liquid fuel to said trough,

an electric heating element disposed in said trough, and an insulating support for sustaining said element in proximity to, and above said liquid level and beneath the lower end of said combustion tube.

4;. A combustion tube burner comp-rising a horizontally disposed trough, and a perforated combustion tube thereabove through the side of which air is admitted adjacent and above the top edges of the sides of the trough, means to supply liquid fuel to said trough, a series of electrically insulating fingers mounted in said trough and extending above the liquid level therein, an electric heating. element mounted on said fingers within the trough and supported horizontally thereby in close proximity to, and above said liquid level, to heat the liquid fuel in the trough and cause vaporization thereof and ignition of the gas formed below the level at which combustion normally takes place.

5. A combustion tube burner comprising .a receptacle having imperforate sidewalls and a horizontally disposed bottom, means for supplying liquid fuel to said receptacle, a perforated combustion tube above said receptacle, whereby, in the normal operation of the burner, combustion takes place only at and above the level at which air is admitted to said tube, and an electric heating element disposed entirely within said receptacle at a substantial distance below said level at which air is admitted, and positioned and operable to effect vaporization of liquid fuel when initially supplied to said receptacle and ignition of the vaporized fuel.

6. A combustion tube burner comprising a receptacle, means for supplying liquid fuel over the bottom thereof and a perforated combustion tube above said receptacle, said receptacle and combustion tube cooperating to provide a vaporization chamber below the level of the perforations in the tube and a combustion chamber above said level, and an electric heating element in said vaporization chamber below the level at which combustion normally takes place in the burner and operable to effect vaporization of liquid fuel when initially supplied to said receptacle and ignition of the vaporized fuel.

LUDGER J CARON.

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