Electric heating – Heating devices – With heating unit structure
Patent
1985-05-17
1987-10-13
Hix, L. T.
Electric heating
Heating devices
With heating unit structure
219553, H05B 334, H05B 354
Patent
active
047000546
ABSTRACT:
An electrical heater which comprises a fabric prepared from at least one of the electrodes and another elongate element of substantially higher resistance. The heater preferably comprises a PTC element, e.g. of a conductive polymer, to render the heater self-regulating. The PTC element may be in the form of a fiber forming part of the fabric, or a layer surrounding one of the electrodes, or a laminar element in which the fabric is embedded. The fabric can if desired be laminated to a sheet of a polymer, e.g. an insulating polymer or a ZTC conductive polymer. A shrinkable fabric heater can be made by incorporating a heat-shrinkable non-conductive filament into the fabric, perpendicular to both electrodes, and is useful for example for enclosing splices in telephone cables.
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Chan Randolph W.
Germeraad Paul B.
Jensen Michael L.
Triplett James T.
Brown Brian W.
Burkard Herbert G.
Hix L. T,.
Raychem Corporation
Richardson Timothy H. P.
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