H - Electricity – 05 – B
Patent
H - Electricity
05
B
309/85
H05B 3/10 (2006.01) H05B 3/14 (2006.01) H05B 3/56 (2006.01)
Patent
CA 1208268
SPECIFICATION FOR PATENT APPLICATION Title "ELONGATE HEATERS" Applicant Raychem Corporation, a corporation organized according to the laws of the State of California, U.S.A. 7 of 300 Constitution Drive, Menlo Park, California 94025, U.S.A. Inventor Hundi Panduranoa Kamath, a citizen of India, of 879 Lockhaven Drive, Los Altos, California 94022 Convention Priority to be claimed U.S. Serial No. 380,400, filed 21 May 1982 by the inventor named above. ABRIDGEMENT Elongate electrical heaters which comprise at least two elongate conductors and at least one elongate resistive heating strip which contacts the conductors alternately as it progresses down the length of the heater, and which is preferably composed of a conductive polymer, particularly a PTC conductive polymer. The conductors can be separated from each other by an insulating strip, with the heating strip being wrapped around the conductors and the insulating strip. Alternatively the conductors can be wrapped around a core comprising the heating strip and an insulating strip. The junctions between the conductors and the heating strip are preferably coated with a low resistivity conductive polymer composition. Figure 1 shows a preferred heater.
428564
Fetherstonhaugh & Co.
Raychem Corporation
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