Electric heating – Heating devices – Combined with diverse-type art device
Patent
1976-10-18
1978-10-17
Bartis, A.
Electric heating
Heating devices
Combined with diverse-type art device
73188, 73212, 219505, 219536, 219539, 219541, 338 22R, 338295, 338328, 338329, H05B 302, G01W 110, H01C 702
Patent
active
041210883
ABSTRACT:
A positive temperature coefficient (PTC) resistance heater assembly is used in combination with an angle of attack vane to provide automatic means for maintaining the temperature of the vane at a level which will de-ice the vane. The heater assembly is embedded in a recess in the vane and is made up of a plurality of individual PTC resistors connected electrically and mechanically in parallel by flexible electrically conductive perforated strips which permit the individual resistors to move relative to each the other under thermal stress and which also permit the encapsulation of the resistors in a suitable thermally conductive, electrically oinsulative material that is sufficiently resilient to permit the individual resistors to expand and contract relative to the vane during use.
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patent: 4000647 (1977-01-01), Tauchmann
Doremus John A.
Kirkpatrick William R.
Bartis A.
Rosemount Inc.
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