US1718106A - Electric heating element - Google Patents

Description

June 18, 1929. BoLslNGER 1,718,106

ELECTRIC HEATING ELEMENT 7' Original Filed Oct. 8, 1927 i l iii i i' i jEjis: WWI

1 N V EN TORv SSBOISiHyer,

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Patented June 18, 1929.

UNITED STATES SAMUEL S. BOLSINGER, OF ROSEBURG, OREGON.

ELECTRIC HEATING ELEMENT.

Original application filed October 8, 1927, Serial No. 224,911.

This invention relates to an electric heater and is a division of my application filed October 8, 1927, Serial Number 224,911.

The primary object of the invention is to provide, in a manner as hereinafter set forth, a device for use in connection with gasoline or kerosene burners whereby the fire hazard, delay due to priming, and other objectionable features may be eliminated when it is desired to light the burner.

A further objectof the invention is to provide a device for the purpose above set forth which is simple in construction, inexpensive to manufacture, strong, durable, compact, and which may be readily installed with respect to the fuel feed. line leading to a gasoline or kerosene burner whereby the burner may be expeditiously lighted when desired.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of a heating element constructed in accordance with this invention, showing an adaptation of the same with respect to a fuel feed line.

Figure 2 is a View similar to Figure 1, showmg the heating element in longitudinal section.

Figure 3 is an end elevation of the heating element, showing the feed line upon which it is mounted in section.

Figure 4 is a detail View of the core in longitudinal section.

In the drawings wherein for the purpose of illustration is shown an embodiment of my invention, the numeral 1 designates a tubular core adapted to be mounted on a fuel line 2. The core 1 may be formed from any suitable material which is a con ductor of heat and a non-conductor of electricity and is provided with a continuous thread or groove 3 extending circumferentially thcrcaround in a spiral formation to receive therein the convolutions of a nichrome wire 4, the ends of which are adapted to be connected, as indicated at 5, with a source of electrical energy, not shown. The thread 3 is of a depth substantially twice the diameter of the wire 4 to permit expansion of the wire with a minimum pressure by the convolutions thereof upon the core 1. The

Divided and this application filed August Serial No. 301,076.

spiral formation of the single thread 3 pcrmits a single length of wire to be used with the convolutions thereof encircling the core 1 in spiral formation and maintained in spaced relation, thereby eliminating any possibility of the convolutions crowding together. In this manner, a continuous con tact is established between the wire and core and the contact is distributed evenly throughout the length of the core.

Mounted on the fuel line 2, adjacent the ends of the core 1, is a pair of heat confining collars or washers 6. The walls of the collars 6 are in alignment with the wall of the core 1 and the inner faces of the collars 6 respectively abut the respective ends of the core 1. Mounted on the assembled core 1 and collars 6 is a heat confining, tubular jacket 7, the inner diameter of which is of appropriate size to permitthe jacket 7 to snugly receive the core 1 and collars 6 therein. The jacket 7 is of greater length than the core 1 but of less length than the combined length of the core 1 and collars 6. In the assembled relation of the jacket 7, core 1, and collars 6, the outermost portions of the latter project outwardly from the ends of the jacket 7. The wall of the jacket 7 is provided with a pair of spaced openings 8, which are respectively disposed adjacent the respective ends of the thread 3, for the passage thercthrough of the respective ends of the wire 1.

The jacket 7 and collars 6 may be formed of any suitable material adapted to prevent or retard the heat from the convolutions of the wire 4 from passing to the outer atmosphere. It is immaterial whether or not the jacket and collars are formed of electricity conducting material, except that, if such ma terial be used, insulation of any suitable type will be required for the walls of the openings 8. At all other points the jacket 7, as well as the collars 6, are insulated from the wire 4 by the core 1. hen the wire 4 is heated by means of its connection with a source of electrical energy, the heat is transmitted from the convolutions of the wire, through the core 1 to the wall of the fuel line 2, thereby vaporizing the fuel within the line, whereby the fuel may be readily ignited at the burner, not shown. After the current passing through the wire 4 is cut off, the heat is retained within the device by means of the jacket 7 and collars 6.

It isto be understood that the embodiment of invention herewith shown and described is to be taken as a preferred example of the same and that Various changes in the size, shape and arrangement of parts may be resorted to Without departing from the spirit of the invention as claimed.

lVhat I claim is:

An electrical heater comprising, a heat conducting, electricity insulating core adapted to be concentrically mounted on a fuel v line, a tubular jacket surrounding said core and projecting from the ends thereof, said core being formed in its periphery with a continuous thread extending circumferem.

tially around the core inspiral formation,

said jacket being formed With a pair of V openings respectively spaced from the ends thereof, a single conductor formed With a series of convolutions seated in said thread and having its end portions extending through said openings for connection With a source of electrical energy, said thread being of greater dept-h than the thickness of said conductor to permit expansion of the convolutions of the latter and maintain the same in spaced relation to said jacket, and means at the ends of said core and extending into the ends of said jacket and coacting with the latter to prevent the passage of heat from said core to the, outer atmosphere.

In testimony whereof, I aliix my signature thereto,

SAMUEL S. BOLSINGER.

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