Electric heating – Heating devices – With heating unit structure
Patent
1980-08-29
1986-03-04
Roskoski, Bernard
Electric heating
Heating devices
With heating unit structure
219505, 219553, 338 22R, H05B 310
Patent
active
045741875
ABSTRACT:
A self regulating ceramic PTCR (positive temperature coefficient of resistance) heater has a pair of spaced interdigitated electrodes on one major surface of a ceramic PTCR plate. A heat transfer means is provided for extracting heat from the opposite major surface of the PTCR plate. Best heating efficiency is obtained when the thickness of the PTCR plate is about the same or is less than the average spacing between the electrodes.
REFERENCES:
patent: 2861163 (1958-11-01), Asakawa
patent: 3188594 (1965-06-01), Koller et al.
patent: 3243753 (1966-03-01), Kohler
patent: 3287684 (1966-11-01), Armbruster, Jr.
patent: 3748439 (1973-07-01), Ting et al.
patent: 3885129 (1975-05-01), Fabricius
patent: 4037082 (1977-07-01), Tamada et al.
patent: 4242567 (1980-12-01), Carter
Crews James E.
Rodriguez George H.
Roskoski Bernard
Sprague Electric Company
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