US950058A - Electric heater. - Google Patents

Description

- F. B. SHAILOR.

H ELEGTRIG HEATER.

APPLIOATIOH TILED JULY 12,1909;

950,058. P atentedFeb. 22, 1910.

9" 1 1: I N- L. 2 E 2 'IZTZZ 11237555755" JNTUB.

W-\ FRANK E: EHAILDZZ.

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UNITED STATES, PATENT curios.

FRANK E. SHAILOR, OF DETROIT, MICHIGAN, ASSIGNOR TO GENERAL ELECTRIC v COMPANSQA CORPORATION OF NEW YORK. I

' ELECTRIC HEATER.

Specification of Letters Patent.

Patented Feb. 22, 1910.

Application filed July 12, 1909. Serial No. 507,030.

To'aZZ whom it may concern:

Be it known that I, FRANK E. SHAILOR, a citizen of the United States, residing at Detroit, county of \Vayne, State of Michigan, have invented certain new and useful Improvements in Electric Heaters, of which the following is a specificatioi'i.

This invention relates to electric heating devices and has for its object the provision of an improved cooking-utensil of the type in which the cooking is entirely done by radiant heat.

My invention relates more specifically tocooking devices in the" nature of a toasting device, although it is evident that broiling may be done on a device of similar (lGSlgl'l. In the application of Parkhurst, 436,620, filed Nov. 20, 1908, there is described and claimed a device of this character in which the heating element consists of coils of bare high resistance wire arranged vertically on a base and surrounded by a metallic ,cage. This cage has a pocket on each'side for receiving the material to be toasted. The coils are held in place by having their lower ends fixed to the base, while the upper end of the coil is fastened to an insulator secured to the top of the cage. I have found that the coils may be arranged in a much more rigid manner by winding the resistance wire upon a core or support of insulating material and securing the support to the base. I have also found that the structure may berendered more rigid by tapering the coils from one end and having the large end at the bottom.

Other objects of my invention will appear in the course of the following specification,

, in which I have shown my invention embodied in concrete form for purposes of illustration. T

In the accompanying drawings, disclosing my invention, Figure 1 represents a front elevation of an electric toaster embodying my invention; and Fig. 2 represents the end 'view ofthe same. 7 I

Referring to the drawings, 10 represents a base, preferably of insulating material,

, such as porcelain, slate or the like. This base is rectangular in form and has mounted on it along a central longitudinal line the heating units 11. .These units each consist of an insulating support 12 of some material such for instance as mica or the like, upon which is mounted the high resistance conductor 13. The mica support is fixed in a slot in the projection 14 on the base. The

previously formed resistance conductor is placed over this support, has its lower end connected with the terminal 15, while the upper end passes through'the insulator 16. This insulator 16 forms one of a series of insulators mounted in the wire frame '17, secured to the upper portion of the incl-osing cage'18. This cage is formed of wires 19 which are W-sha ed, as indicated in the drawing. The wires are held together by transverse wires 20 and 21 and united by hard solder or welded-to form a rigid structure. The bottom wires are bent as indicated at 22 and looped so as to be engaged bv bolts 23 for fastening the frames together. The outside wires of the W-turns form the pockets in which the bread is placed to be toasted. The resistance wire 13 may be of any desired material, but I have found that the wire covered by the patent 'to Dempster, No. 901,428, is very well adapted for this purpose. The wire may be preliminarily heated to form a thin film of insulating oxid, but this is not so essential, since the wire is wound upon an insulating base and cannot be short circuited ,upon itself. The resistance coils are all connected in series as shown; the wire frdm the first coil 13 passes through insulator 16, then down through the next insulator to the second coil, the second coil is connected with the other coil at the base and the third coil passes through the insulator down into the fourth coil as before. These wires are then connected to terminal pins 24. The unit being" tapered is much stronger and the mica support on which the wire is wound prevents the wire from sagging when heated and short circuiting upon itself or'presenting an unsightly appearance. The mica being transparent permits the entire coil to be seen and in addition absorbs heat and becomes an auxiliary source of radiant heat producing a very uniform heating effect which is especially desirable in such operations as toasters or broilers.

While I have described my invention as embodied in concrete mechanism for the purpose of illustration, it should be understood that I do not limit my invention thereto, since various modifications thereof will suggest themselves tothose skilled in the art without departing from the spirit of my invention, the scope of which is set forth in the annexed claims.

What I claim as new and desire to secure by Letters Patent of the United States, is,

1. An electric cooking utensil comprising a plurality of high resistance coils of bare Wire Wound upon an insulating support, a base for holding the same in a vertical position, and a metal cage provided with baskets at the sides for inclosing said coils.

2. An electric cooking utensil comprising a pulrality of high resistance coils of bare Wire wound upon an insulating support, a

base for holding the supports in a vertical position, a metal cage provided With baskets at the sides for inclosing said coils, and insulators in the upper part of said cage for supporting the coils.

An electric cooking utensil comprising a plurality of high resistance coils of bare wire Wound upon a tapered insulating support,'a base for holding the supports in-a vertical position, and means for supporting the upper end of the coils.

4. An electric cooking utensil comprising a plurality of high resistance coils of bare Wire Wound upon a tapered insulating support, a base for holding the supports in a vertical position, a metal cage provided with baskets at the sides for inclosing said coil, and insulators in the upper part of said cage for supporting the coils.

5. An electric cooking utensil comprising a plurality of high resistance coils of bare Wire Wound upon a tapered insulating support, a base for holding said supports in a vertical position, a metal cage for inclosing said coil, and insulators in the upper part of said cage for supporting the coils.

6. A radiant heater comprising a plurality of vertical heating units, each comprising a coil of resistance Wire supported by a tapering mica strip.

7. An electric cooking utensil comprising a high resistance coil of bare wire Wound upon an insulating support, a base for holding the same in a vertical position, and a metal cage provided With baskets at the sides for inclosing said coil.

8. An electric cooking utensil comprising a high resistance coil of bare Wire Wound upon a tapered insulating support, a base for holding the support in a vertical position, and means for supporting the upper end of the coil.

9. An electric cooking utensil comprising a high resistance coil of bare Wire Wound upon a tapered insulating support, a base for holding the support in a vertical position, a metal cage provided with baskets at the sides for inclosing the coil, and insulators in the upper part of said cage for supporting the coil.

In Witness whereof, I have hereunto set my hand this 26th day of June, 1909.

' FRANK E. SHAILOR.

Witnesses:

LEO PORDEN, CHAS. RUSCHKA.

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