Heat exchange – With alarm – indicator – signal – register – recorder – test or... – Remotely controlled inspection means
Patent
1979-09-19
1981-07-07
Davis, Albert W.
Heat exchange
With alarm, indicator, signal, register, recorder, test or...
Remotely controlled inspection means
236 46R, 364505, F25B 2900
Patent
active
042769256
ABSTRACT:
A digital computerized temperature control system maintains ambient temperatures at preselected levels respectively at a plurality of remote locations, each of which may be provided with a digitally operated electronic thermostat of the type described in U.S. Pat. No. 3,942,718. The system includes a real time clock, a keyboard data-entry unit, serial data controllers for sequentially polling each of the thermostats and producing polled temperature data, including a first memory for storing the data corresponding to the desired temperature limits for each thermostat location and a second memory for storing the polled temperature data. A comparator compares the polled temperature data with the desired ambient temperature limit data and accordingly produces overlimit, underlimit and equal limit counts which are stored in another memory. A central processor unit selectively produces heating, cooling, and no-operation signals in accordance with the overlimit, underlimit and equal limit counts.
REFERENCES:
patent: 3724534 (1973-04-01), Weatherston
patent: 3942718 (1976-03-01), Palmieri
patent: 4071745 (1978-01-01), Hall
patent: 4141407 (1979-02-01), Briscoe et al.
patent: 4213562 (1980-07-01), Garrett et al.
patent: 4215408 (1980-07-01), Games et al.
Davis Albert W.
Fuel Computer Corporation of America
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