Electrical heating units

Details Electrical heating units Electrical heating units

1979-05-16

1981-02-24

Reynolds, B. A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219461, 219354, 219355, H05B 376

Patent

active

042530121

ABSTRACT:
Described herein is an electrical heating unit for smooth top cookers. The unit comprises a heating element in the form of a spiral coil of bare wire which has then been helically rolled together with a strip of flexible thermal and electrical insulation such as a ceramic paper around a central core. The resulting rolled structure is some-what analogous to a "Swiss roll". This structure rests on and is supported on a base layer of thermal and electrical insulation which is desirably dish-shaped and contained an outer metal pan for earthing and mechanical protection. The rolled structure is retained in its configuration and held against the base layer by a number of spoke-like members of heat resistant and electrically insulating material across the top of the element.

REFERENCES:
patent: 563032 (1896-06-01), Hadaway
patent: 747185 (1903-12-01), Kelley et al.
patent: 1152950 (1915-09-01), Hoke
patent: 2164650 (1939-07-01), Goldthwaite
patent: 2490602 (1949-12-01), Schick
patent: 2943178 (1960-06-01), Aldous
patent: 2955190 (1960-10-01), Kelly
patent: 3819903 (1974-06-01), Frick
patent: 3833793 (1974-09-01), McWilliams et al.
patent: 4057670 (1977-11-01), Scheidler

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