Electric heating – Heating devices – With heating unit structure
Patent
1994-07-29
1997-04-01
Evans, Geoffrey S.
Electric heating
Heating devices
With heating unit structure
219407, 219464, 219465, 219468, 392434, 392438, 392439, F27D 1102, H05B 316, H05B 366, H05B 320
Patent
active
056162669
ABSTRACT:
A large-area, thin film, resistance heating element (21, 46, 81) including a relatively rigid substrate (22, 63, 82), which will retain its mechanical properties at elevated temperatures, an electrically conductive film (26, 64, 84) deposited on the substrate (21, 46, 81), and electrical terminals (31, 66, 86) provided on the film (26, 64, 84). A metallic substrate (22, 63), such as a steel sheet, having an electrically insulating ceramic-based layer (23, 62, 83) thereon may be employed, or alternatively, a micanite plate or sheet (61) can be used. The substrate and film have an area which is sufficiently large that the heater can operate at maximum temperatures above 100.degree. F. with a power density less than about 15 watts per square inch. The electrically conductive film is preferably a metal-oxide film, such as tin-oxide, and is used as a resistance heater in applications such as ovens (41) and space heaters (81) to allow delivery of substantial power at lower operating temperatures and low power densities for greater efficiency.
REFERENCES:
patent: 2624823 (1953-01-01), Lytle
patent: 3108919 (1963-10-01), Davis
patent: 3551195 (1970-12-01), Wada et al.
patent: 3694627 (1972-09-01), Blatchford et al.
patent: 3978315 (1976-08-01), Martin et al.
patent: 4002883 (1977-01-01), Hurko
patent: 4091144 (1978-05-01), Dresner et al.
patent: 4168344 (1979-09-01), Shapiro et al.
patent: 4196330 (1980-04-01), Payne
patent: 4198553 (1980-04-01), Dills
patent: 4258080 (1981-03-01), Sonoda et al.
patent: 4298789 (1981-11-01), Eichlberger et al.
patent: 4340508 (1982-07-01), Wahlers et al.
patent: 4349369 (1982-09-01), Van Laethem et al.
patent: 4870388 (1989-09-01), Sugata et al.
patent: 4889974 (1989-12-01), Auding et al.
patent: 4970376 (1990-11-01), Mellor et al.
patent: 5039845 (1991-08-01), Clough et al.
Buffler, Charles R. Microwave Cooking and Processing Published by Van Nostrand Reinhold, New York.
Evans Geoffrey S.
Pelham J.
Thermal Dynamics U.S.A. Ltd. Co.
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