Electric heating – Heating devices – With heating unit structure
Patent
1980-05-19
1981-06-02
Mayewsky, Volodymyr Y.
Electric heating
Heating devices
With heating unit structure
29611, 174106SC, 174107, 174120SC, 219504, 219528, 219548, 252511, 264174, 338 22R, 338214, H05B 354
Patent
active
042713501
ABSTRACT:
A heating element for use in an electric blanket or the like including conductors spaced apart in a positive temperature coefficient (PTC) material which serves as a self-limiting heater. The conductors are separated by a spacer which prevents the conductors from engaging each other when the PTC material softens or melts during annealing thereof. A coating of material having a higher melting point than the PTC material is placed over the PTC material to maintain its shape during the annealing process.
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patent: 4008367 (1977-02-01), Sunderhauf
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Clark George R.
Mayewsky Volodymyr Y.
Rose Neil M.
Sunbeam Corporation
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