Electric heating elements

Details Electric heating elements Electric heating elements

1974-12-11

1976-03-09

Albritton, C. L.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

29611, 219316, 219318, 219336, 219523, H05B 100, F24B 100, H05B 304

Patent

active

039433285

ABSTRACT:
An electric heating element, comprising a tubular sheath formed of a thermoplastic material, an electric resistance element, such as a helical coil of resistance wire within the sheath, compacted refractory material within the sheath to hold the resistance element substantially centered within the sheath and out of engagement with the inner wall surface of the sheath, and means for mounting the sheath to a support wherein the active heating portion of the element is disposed in an environment which is controlled to maintain the sheath temperature below its melting point.
The invention is particularly suited to heat liquids wherein the active heating portion is immersed in the liquid. The mounting means may also be formed of thermoplastic material and may have a terminal block integral therewith or, if a separate terminal block is used, this may be formed of a compatible thermoplastic material. The assembly of the thermoplastic parts may be effected by adhesive, heat sealing or sonic welding.

REFERENCES:
patent: 1849175 (1932-03-01), Clark et al.
patent: 2816207 (1957-12-01), Boggs
patent: 3582613 (1971-06-01), Pies
patent: 3754118 (1973-08-01), Booker

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