Duty cycle shared proportional temperature control

Details Duty cycle shared proportional temperature control Duty cycle shared proportional temperature control

1977-06-24

1979-07-03

Albritton, C. L.

Electric heating

Heating devices

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

219483, 219486, 219492, 219508, 307 39, H02M 700, H02J 300

Patent

active

041601530

ABSTRACT:
A system having two heaters, such as a photographic processor with a solution heater and a dryer heater, has proportional controllers for each of the heaters. A priority control co-ordinates operation of the two controllers to give full priority to one of the two heaters during warm up, and a reduced percentage for running conditions. The other heater is allowed to share the remaining available input power.

REFERENCES:
patent: 3153728 (1964-10-01), Procter
patent: 3243597 (1966-03-01), Burley
patent: 3296452 (1967-01-01), Williams
patent: 3519786 (1970-07-01), Roberts
patent: 3586869 (1971-06-01), Kompelien
patent: 3858094 (1974-12-01), Hanchett, Jr.
patent: 3872371 (1975-03-01), Williams
patent: 3901308 (1975-08-01), Berger
patent: 4020358 (1977-04-01), Wyland
patent: 4048812 (1977-09-01), Thomason
patent: 4063075 (1977-12-01), Collom

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