US2239175A - Igniter foe stoves - Google Patents

Description

April 22, 1941.

L. R. UNSER IGNITER FOR s'rovns Filed Jan. 2, 1940 2 Sheets-Sheet 1 INVENTOR .L.R.Unser BY ATTORNEYS pia 1- L. R- UNSIER. 2,239,175

IGNI'I'EK FOR S'I'QVES Filed Jan. 2, 1940 Z Sheets-$heet 2 zg'xr-xzgi 6 l M INVENTOR L .R. Una er ATTORNEYS Patented A r. '22, 1941 2,239,175 7 return]: For; s'rovns Lawrence It. Unser, Sprlngville, Calif. Application January 2,1940, Serial No. 312,083 (01. 115-115) 2 Claims.

This invention relates in general to room type oil burning heaters such as are used for domestic heating andvthe like; the invention being directed in particular to an improved ignitingassembly for heaters of such type.

One of the objects of the present invention is to provide animproved igniting assembly for an oil burning heater: such igniting assembly being electrically actuated, and including a push-button switch mounted in convenient location on the exteriorshell of the heater.

Another object .of the invention is to provide an improved electricallyactuated oil igniting unit adaptedto' -be mounted in the .'open fire pot or a lead wires 8 and a disposed within the shell l and connected to an outlet A into which an extensioncorcl C may be plugged. The wire 8 has a push-button switch HI connected in series therein and normally maintaining the circuit open, while the wire 9 has a suitable fuse block H in series therein. The push-button switch it is mounted on the front of housing l at a con:

' venient and accessible point whereby a person de- A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose "for which it is designed.

- These objects I accomplish'by means of such;

structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views: Figure 1 is a front elevation of an oil burning heater embodying the present invention; the

front of the heater and the burner being each partially broken away to illustrate the position of the oil igniting unit in the burner.

Figure 2 is an enlarged plan view of the oil igniting unit as mounted in the burner.

Figure 3 is an enlarged inner end view of the oil igniting unit as mounted in place in the burner.

Referring 'now more particularly to the char acters of reference on the drawings, and particularly at present to Fig. 1, the, numeral 8 indicates the exterior housing or shell of an oil burning heater; such shell including air intake louvers 2, air outlet louvers 3 and a windowed door 4 in the front thereof which permits 0! access to the interior of the heater. As is usual, the heater includes an open top fire pot or burner 5, and a valved oil feed line (not shown) leads to and is arranged to discharge into said fire pot or bm'ner in the customary manner.

The present invention contemplates the use of an electric oil igniting unit indicated generally r at 6 mounted within the burner 5 adjacent the .bottom thereof and adapted to ignite oil I in the siring to ignite the heater need only turn on the oil supply for the burner and then hold push buttonswitch llldepressed for a few moments, which causes the igniting unit 8 to create sufllclent heat in the manner as will hereinafter appear, to promptly ignitethe oil supply about and adjacent said unit.

The oil igniting unit indicated generally at 6 in Fig. 1 is shown in detail in Figs. 2 and 3, and comprises a tubular metallic fitting l2 extending horizontally through the walls of the burner 5 a short distance above the bottom B of said burner; said fitting being held in place by clamping nuts l3 threaded on the ends thereof and engaging the adjacent portions of the burner.

The fitting i2 is formed with a dielectric and fireproof core ll, preferably of porcelain or the like. Metallic lead strips l5 extend through the porcelain core H in spacedrelation and extend at ,both ends beyond the fitting 82. At their outer ends, the lead strips iii are provided with out-turned ears it having terminal screws 9! threaded thereinto. The wires 8 and 9 are adapted to be connected with the lead strips by means of said terminal screws ll. At their inner ends, the lead strips l5 project a substantial distance from the fitting if in opposite directions, and at their ends are formed with down-turned or depending legs 08.

The oil igniting mechanism is connected to and carried by said legs l8, and comprises a fiat, elongated, and rectangular base IQ of sheet mice. or the like; said base having an elongated and longitudinally extending opening 20 therein.

A length of resistance wire 2|, preferably of the fiat or strip type, is wound about the base 09 from end to end thereof, each turn of the wire being spaced from the adjacent turns, as-shown. The ends of wire 2| are connected with the lower ends of legs. ill in any suitable manner, and so that the base It! and wire 2| are supported thererom.

The fitting I2 is mounted above the bottom B of burner 5 at such a level that base I9 is disposed relatively close to said bottom, a plurality of absorbent, fireproof pads 22, preferably of as:

The oil igniting unit functions in the following manner: When the circuit is closed, and current flows through resistance wire 2|, such wire becomes red-hot. As the base, or at least the pads 22 are submerged in the oil in the bottom of the burner, such oil is quicklyignited when the wire 2i begins to glow. The pads 22 support the base I! a sufilcient distance above the bottom B of the burner to permit of ready combustion of the oil, and without choking out of the resulting fire, as might possibly occur if the base rested directly on the burner bottom. Also, the opening 20 permits of circulation of the gases of combustion, etc., from beneath the base, and thus further facilitates ignition.

As the oil igniting unit is disposed in the burner relatively close to the bottom thereof, such unit will not tend to burn out, for the reason that upon and after initial ignition of the oil, the burner becomes extremely hot, vaporizing all the oil therein and causing the flame to rise and burn high, so that the igniting unit is below the flame zone.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention, what I claim as new and useful and desire to secure by Letters Patent is:

1. An oil igniting unit for heaters, said unit 5 including a fitting adapted to extend into the burner of the heater, a pair of leads extending through the fitting in insulated relation, a dielectric, fireproof base, said base being fiat and elongated, an exposed wire forming a resistance coil wound about said base from end to end thereof,

the adjacent ends of the leads being connected with the ends of the resistance coil, the base and coil being disposed substantially horizontal in the burner adjacent but spaced above the bottom l5 thereof, and a plurality of absorbent, fireproof pads disposed in side by side but spaced relation between the bottom of the burner and said coll; the p ds being engaged by the latter, and said opening bridging the space on opposite sides of at least one of said pads.

2. In an oil igniting unit for a heater having-a burner, said unit including an ignition assembly comprising a sheet-like base, said base having an opening therethrough, a resistance coil wound about the base, the loops of the coil being spaced the bottom of the burner, and an absorbent fibrous pad engaged between said base andv the bottom of the burner, said pad crossing the opening and the latter being partially unobstructed by said pad.

LAWRENCE R. UNSER.

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