Temperature controlled timer

Details Temperature controlled timer Temperature controlled timer

1980-12-29

1983-03-29

Paschall, M. H.

Electric heating

Heating devices

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

219508, 219493, 219202, 236 46A, 236 46C, H05B 102

Patent

active

043784860

ABSTRACT:
A temperature controlled timer useful for controlling the application of power to apparatus such as automobile block heaters or the like. In one embodiment the time of application of power prior to a shut off time is decreased with increasing ambient temperature. In another embodiment the duty cycle of cyclically applied power is changed so that the power on period becomes shorter and the power off period becomes longer with increasing ambient temperature. Significant conservation of power results.

REFERENCES:
patent: 4040565 (1977-08-01), Christiansen
patent: 4102495 (1978-07-01), Flynn et al.
patent: 4106690 (1978-08-01), Tomlinson
patent: 4177388 (1979-12-01), Lingenfelter
patent: 4206872 (1980-06-01), Levine
patent: 4214171 (1980-07-01), Gyori
patent: 4277018 (1981-07-01), Nelson

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