Air heater with safety control circuit

Details Air heater with safety control circuit Air heater with safety control circuit

1990-11-27

1992-01-21

Paschall, Mark H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219497, 219491, 219494, 392360, 392365, H05B 102

Patent

active

050830112

ABSTRACT:
An air heater with a safety control circuit is disclosed. A heat source is mounted within a hollow housing having an air inlet end and an air outlet end. The heat source is actuated in response to the presence of a heat control signal. The heat control signal is produced when both a predetermined minimum pressure differential between static air pressure outside the hollow housing and the air velocity pressure within the housing is reached and the temperature of a portion of the housing is lower than a predetermined maximum sensed temperature. Application of the heat control signal to the heat source can be manually initiated or interrupted.

REFERENCES:
patent: 3029332 (1962-04-01), Cotts
patent: 3235708 (1966-02-01), Kirk
patent: 4185187 (1980-01-01), Rogers
patent: 4211251 (1980-07-01), Rickert et al.
patent: 4954693 (1990-09-01), Mitsuhashi et al.

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