US819654A - Flexible sheet resistance. - Google Patents

Description

No. 819,654. PATENTED MAY 1, 1906.

H. E. HEATH. FLEXIBLE SHEET RESISTANCE.

APPLICATION FILED DEG. 12, 1904.

wltnesses Inventor.

// Harry E. I-ieath; W bg My;

I UNITED srArss- I HARRY PATENT oinrion ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

, FLEXIBLE SHEET RESISTANCE.

To all whom it may concern Be it known that I, HARRY E. HEATH, a citizen of the United States, residing at Lynn, county of Essex, State of Massachusetts, have invented certain new and useful Improveinents in Flexible Sheet Resistances, of whichthe following is a specification.-

.- ;and retained in that form by electrical com This invention relates to electrical resistance material, and has for its object the provision of a resistance fabric that may readily.

of refractory insulating material, preferably of vitreous character, such as glass, porcelain, or earthenware. These beads 'or but. tons are formed into a fabric and supported ductors. The beads are slotted to receive the conductor, and the contacting of the adjacent beads with each other revents shortcircuiting of the conductor, W 1c the rounded corners of the beads permit them to slip i the cylinder shown in Fig. 4.

ast each other, so as to render the fabric Specification of Letters Patent. I

, Application filed December 12, 1904. Serial No. 236,457.

Batented May 1, 1906.

coated with enamel and may vary in shape. I arran e these buttons in columns in coning portions of the buttons of one row being in the adjacent row. An electrical conductor 2 is arranged to enga e the slotted portions of the buttons, so t at when the conductor is drawn taut the buttons are in conto slip past each other to form a flexible fabr1c.

In Figs. 4 and 5 I have shown a cylinder constructed from the same kind of buttons as those of Fig. 1, the cylinder being developed in Fig. 5. The buttons themselves are made, as shown in Fig. 3, with a flat hole 3 and one side 4, cut away sufiiciently to permit the conductor to pass through it and into the hole 3:. I have shown the button in Fig. 3as .made of metal with its surface 5 enameled. This makes a very chea and efficient construction, for very little arm could be done b the chi ping of the enamel, unless it cl iipped undbr both wires, in which case only one turn of the conductor would be shortcircuited. By this construction any bead exible... This construction permits of. the may be removed and another substituted fabric being made into any desired form and may be sewed between cloth covers or held in felt for a heating-pad. The beads are slotted, so as to make them readily detachable and to make it unnecessary to thread the conductor through the beads, which, especially in the case of a very long conductor, is very undesirable. I

In the drawings 1 have illustrated various methods of carryin out my invention, while the claims I appended hereto indicate the S00 e thereof.

n the drawings, Figure 1 isa plan view of one form of my insulating fabric; Fi .2 is an end view thereof. Fig. 3 is an en arged view of one of the beads shown in Figs. 1 and 2. Fig. 4 shows the fabric made into a cylindrical form, and Fig. 5 is a development of Referring to the drawings, the fabric is com osed of beads 1, made c-shaped of some goo refractory insulating material, preferably of a vitreous character, such as lass, porcelain, or earthenware. They may, owever, be made of slate, wood, or of metal therefor Without disturbing the others. This construction also permits the use of long lengths of Wire, which is not pirmissible where the conductor is threaded ough the button.

A fabric formed of insulatin buttons, as

herein described, will withstan a high heat and prevent short circuits when the conductor runs hot, as'is frequently necessary in electric heaters. The beads are very strong and will withstand rough usage. As a resistance medium I may use any approved wire, satisfactory results having been ob-- tained with Climax wire, being a nickelsteel compound, and with Advance wire or nickel-co per.

What claim as new, and desire to secilre 1. A resistance unit comprising a sheet of ,buttons having an electrical conductor running therethrough, and means whereby any the unit without remo -1g any of the others.

2. A resistance fabric comprisin a plurality of rows of insulating aperture buttons tact wit each other, as shown, the contact v opposite the slotted portions of the buttons by Letters Patent of the United States, is-- E. HEATH, or LYNN, MASSACHUSETTS, ASSIGNOR 'ro, GENERAL tact, while their rounded edges permit them one of said buttons ma be detached from I having one face slotted to admit a conductor to the aperture, and an electrical conductor running through said aperture.

3. A resistance fabric comprising a plurality of rows of insulating apertured buttons having one face slotted to admit a conductor to the aperture, and an electrical conductor running through said aperture, said conductor engaging each its interior Wall.

4. A resistance fabric comprising a plurality of rows of insulating apertured buttons having one face slotted to admit a conductor to the aperture, and a continuous electrical conductor running through said aperture,

button on opposite sides of said conductor engaging each button on opposite sides of its interior Wall.

5. A resistance fabric composed of a plurality of rows of insulating-buttons, and an electrical conductor in engagement with said buttons, and means whereby any one of said buttons may be removed from said engagement Without removing any of the others.

In witness whereof I have hereunto set my hand this 9th day of December, 1904.

HARRY E. HEATH.

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