Self-regulating electric heating element for heaters shaped as c

Details Self-regulating electric heating element for heaters shaped as c Self-regulating electric heating element for heaters shaped as c

1997-07-14

1999-10-12

Paschall, Mark

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219543, 219538, 219546, 219548, 219552, 338 22R, H05B 102

Patent

active

059650494

ABSTRACT:
An electric resistance heating element preferably of cylindrical or prismatic shape to be inserted into a test tube, a cartridge or in another cavity has one or more conductors connected to the supply system by the use of one or more electrodes. The conductors are made of a conductive composite material of a polymeric matrix with resistive function which are formulated at such ratio and materials as to achieve an electric resistance with high positive temperature coefficient (PTC) at the operation temperatures. The electrodes may be made of metallic materials. At least a core is made of insulating material, onto which the conductors with resistive function (PTC) and the electrodes are applied.

REFERENCES:
patent: 4266115 (1981-05-01), Dannatt
patent: 4354092 (1982-10-01), Manabe et al.
patent: 4379220 (1983-04-01), Middleman et al.
patent: 4654511 (1987-03-01), Horsma et al.
patent: 5084694 (1992-01-01), Kikuchi et al.
patent: 5354965 (1994-10-01), Lee

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