Electric heating – Heating devices – With heating unit structure
Patent
1989-10-24
1991-03-05
Envall, Jr., Roy N.
Electric heating
Heating devices
With heating unit structure
219505, 338 22R, H05B 318, H05B 314
Patent
active
049980084
ABSTRACT:
A self-regulating heating device with a lamellar resistance-heating body made of an electrically conducting ceramic material with a positive temperature coefficient which heating body, together with electrical insulating bodies through which heat is dissipated from the heating body, is squeezed via wedging into a wedge-shaped slot of a body or housing body to be heated. The lamellar resistance-heating body is wedge-shaped in construction and the essentially planar wedge surfaces of this heating body which extend obliquely toward each other, through interjoining of the insulating bodies, are facing the lateral surfaces of the slot. Preferably, thermal resistance is reduced at the heat exchanging contact surfaces by a thin contact layer made of thermal conducting mass. Current supply is effected at the surfaces of the resistance-heating body adjacent to the wedge surfaces.
REFERENCES:
patent: 4371778 (1983-02-01), Meixner et al.
patent: 4468555 (1984-08-01), Adachi et al.
patent: 4493972 (1985-01-01), Steinel et al.
patent: 4700050 (1987-10-01), Hennuy et al.
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