Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1976-08-16
1978-02-07
Mayewsky, Volodymyr Y.
Electric heating
Heating devices
With heater-unit housing, casing, or support means
174 52PE, 219505, 219535, 219541, 219544, 219549, 338 22R, 338214, H05B 356
Patent
active
040728480
ABSTRACT:
An electrical heating cable which limits power output once an established temperature limit is reached. The cable includes heating elements in the form of temperature-sensitive variable resistance elements electrically connected in parallel between two supply bases at spaced positions along the length of the buses. The heating elements not only serve to generate heat for heating but also undergo a substantial positive increase in resistivity when the temperature of the cable nears the established temperature limit. The increase in resistivity substantially reduces the heat-generating current in the cable to limit the power output to within established heat limits.
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Anderson Robert E.
Cassidy Patrick E.
Glowe Donald E.
Johnson Ben C.
Thornton J. Scott
Mayewsky Volodymyr Y.
Thermon Manufacturing Company
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