ELECTRIC HEATING SOURCE FOR SEATS AND MATTRESSES AND METHODS OF APPLICATION OF THE SAME

• US 3,721,799 A
• Filed: 10/20/1970
• Issued: 03/20/1973
• Est. Priority Date: 10/22/1969
• Status: Expired due to Term

• Current Assignee: Ruben Carlstrom
• Original Assignee: Ruben Carlstrom
• Inventors: Carlstrom, Ruben
• Primary Examiner(s): Albritton, C. L.
• Application Number:
  US05/082,345
• Time in Patent Office: 882 Days
• Field of Search: 219/211-213,217,528-529,543,545,548,549 338/208 139/425 5/334
• US Class Current: 219/212
• CPC Class Codes: H05B 2203/005 using multiple resistive elements or resistive zones isolated from each other
• CPC Class Codes: H05B 2203/015 Heater wherein the heating element is interwoven with the textile
• CPC Class Codes: H05B 2203/017 Manufacturing methods or apparatus for heaters
• CPC Class Codes: H05B 2203/029 Heaters specially adapted for seat warmers
• CPC Class Codes: H05B 2203/033 Heater including particular mechanical reinforcing means
• CPC Class Codes: H05B 3/342 heaters used in textiles

Abstract

The electric heating source of the invention is a fabric provided with parallelly interwoven groups of resistance wires transversed by parallelly interwoven groups of conducting wires, both kinds of wires thereby forming electrical contacts with each other. The resistance wires are interrupted, in the fabric, to form current circuits in which the transversely interwoven wires are connected to conductive feeder wires which are connected to a suitable current supply.

Claims

1. In an electric source for seats, fabrics, blankets, mattresses, stretchers and the like involving the use of resistance heating means and the arrangement of these in a fabric of insulating warp and weft strands, the improved construction wherein the heating source consists essentially of at least one heating circuit being formed by an arrangement of substantially parallelly running resistance wires traversed by substantially parallel conducting wires of relatively low resistance, said arrangement of wires forming substantially square-shaped sections of predetermined size, said at least one heating circuit being combined with a suitable insulating carrier material, said parallel resistance wires being interwoven in parallel groups in said fabric, said resistance wires running through current circuits in the fabric between which they are interrupted and in which several heating sections are formed, said resistance wires in the current circuits being transversely interwoven with groups of conducting wires which are connected to conductive feeder wires located adjacent the ends of the conducting wires.

2. Electric heat source according to claim 1, wherein the resistance wires forming sections are operatively associated with fiber wires, arranged in interwoven formations, that fasten the resistance wires at their traversing points.

3. Electric heat source according to claim 1, wherein the resistance wires and the conducting wires consist essentially of multiple strands each strand having a small diameter.

4. Electric heat source according to claim 1, wherein the conductive feeder wires are connected to a power switch through which electrical current is supplied to the electric heating source.