US910725A - Electric heating device. - Google Patents

Description

' A. E. REIMERS. ELECTRIC HEATING DEVICE. APPLICATION FILED D20. 26. 1907.

In Z9672 Z021 Patented Jan. 26, 1909.

PATENT OFFICE.

ALFRED E. Ramses, or nnw YORK, r.

ELECTRIC HEATING DEVZGE.

' Specification of Letters Patent.

Patented Jan. 26, 1909.

Application filed December 26, 1907. SerialNo. 408,211.

To all whom it may concern:

' I Be it known that I, ALFRED E. Bananas, a citizen of the United States, residing at New York; in the county of N ew'York and State of New York, have invented a new and useful Electric Heating Device, of which the followingris a specification.

- iron,.it may he obiect of this invention is to provide a heating e ement for electrically heated a paratus and utensils, which (a) secures u orm distribution of heat overv the surfacqto be heated, (b) may be readily replaced or renewed, (c) is economical in operation, and ((1). may be manufactured at a'minimum cost.

Although the accompanying drawing illus trates the ap lication of the device to a sad- I e wound in any desired shape, it being ada table to the shape of the surface to be heate The letters refer to the same parts Figure 1 is a side view of the base of the device and its heating element; Fig. 2 is a plan view thereof partly broken away; Fig. 3 is a cross section of the base of the device; Fig. 4,

is an "inverted plan view of a caslng comprising the upper ortion of the device; Fig. 5, is a side view 0 the said upper portion; and Fig. 6, is a fragmentary cross section of the base of the device drawn on an enlarged scale.

In Fi s. 1, 2 and 3 the casting 1, insulated with a s eat of mica 2, and the pieces 3 and 4 are .sorewed together as shown, forming a slot 5. The form 4 serves to separate 1 and 3 and forms the bottom of the slot 5. In the insulated slot thus formed is wound the uninsulated resistance wire or ribbon 7, which a'sshown by Figs. 3 and 6 of the drawing, is rectangular in cross section, and asbestos yarn 8, the yarn and wire being wound on at the same time. Fig. 2 shows at 21 a View of the windin with apart of the piece 3 removed. T le distance piece 27, is inserted in slot 5 after a part of the winding is in place and serves tocarry the remaining turns into the point of the iron, thus obtaining amore equal distribution of heat. The ends of the W'H'e 7 are secured by the termiilal screws 6.

The asbestos separates and insulates the layers of wire without separating the wire from the mica of the base, hence permitting the heat to pass from the wire through the mica to the iron. It is obvious that strips of mica or any other suitable insulation may be used instead of asbestos.

The piece 3 as shown in Figs. 1, 2 and 3, is made of asbestos Wood, or other suitable nsulatin material, on which the terminals maylbe astened and which will check the passage of heat to the upper art'of the iron. The piece 3 may be of meta insulated with mica or fire-proof enamel. Also, the mica insulation of 1 may be substituted by enamel or other suitable material.

Figs. 4 and 5 represent the upper portion of the iron, composing the bulk of the apparatus and containing the terminal studs 9, to the rear of which are fastened the contact springs 10 that make contact with the terminals of the resistance element. The supply conductors are led through the tube 11 "and connected to the terminal screws, the

whole being accessible through. the aperture 12, which may be covered by a plate 17.

What I claim as my invention and desire to secure by Letters Patent is:

1. In an electric heating device, the combination with a framecomprising two insulated metallic plates, and a central form and a distance plate secured between them, and forming a narrow space between said insulated plates, of high resistance conductor wound in said space partly around said central form and partly on said distance plate, the coils of said conductor being insulated from each other.

2. In an electric heating device, the combination with a frame comprising two insulated metallic plates, and a central form and a distance plate secured between them and forming a narrow space between said insulated plates, the outer surface of one of the said plates being exposed, of high resistance conductor embodying-wire having fourflat sides, said Wire Wound in said s ace partly around said central form and pdi tly on said distance plate, and insulating tape separating the coils of said conductor.

3. An electric heating device comprising a frame embodying two insulated metallic plates, and a central form and a distance plate between their insulated surfaces formparts, and electric current to affect every part of said conductor and afiord facility for 1 and partly on said distance late, the coils of distributing the heat throughout every l said conductor being insu ated from each 10 evenly part of the plate to be heated. 5 other, of an insulator embodying a plate 4. In an electric heating device, the com- I covering said conductor. v 5 bination with a metallic plate having an insu- A ALFRED E. REIMERS. lated surface, and a central form anda dis- Witnesses: tance plate thereon, ,and high resistance con- M. H. STEVENS, ductor wound partly on said central form L. E. HICKS.

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