Resistive heater

Electric heating – Heating devices – With heating unit structure

Patent

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Details

13 25, 219354, 219553, 338316, 338322, H05B 308

Patent

active

042412927

ABSTRACT:
A resistive heater comprising an emitter, including a hot zone center section and lower temperature end sections, disposed within a protective tube with the emitter and protective tube being mounted within end caps with a spring mechanism provided to allow for the difference in expansion and contraction of the emitter and protective tube during heating and cooling.

REFERENCES:
patent: 994447 (1911-06-01), Egly
patent: 1593725 (1926-07-01), Sharpe
patent: 2735881 (1956-02-01), Mann
patent: 2768277 (1956-10-01), Buck et al.
patent: 3139474 (1964-06-01), Weech
patent: 3155759 (1964-11-01), Marshall
patent: 3307136 (1967-02-01), Fitzer et al.
patent: 3321727 (1967-05-01), Schrewelius
patent: 3538231 (1970-11-01), Newkirk et al.
patent: 3875477 (1975-04-01), Fredriksson et al.
patent: 3969943 (1976-06-01), Andersen

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