Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1985-01-28
1986-09-16
Rowland, James L.
Communications: electrical
Condition responsive indicating system
Specific condition
119 1409, G08B 1900, A01J 904
Patent
active
046125370
ABSTRACT:
An alarm system and method for monitoring the temperature of a liquid contained in a reservoir. The system comprises a temperature sensing probe for sensing the temperature of the liquid. A sensing circuit is associated with the probe to generate a temperature indicating signal representative of the liquid temperature. A calibration circuit is provided for calibrating the temperature signal relative to a reference signal. Converter means is provided to convert the calibrated temperature signal to a binary signal indicative of sensed temperatures of the liquid whereby to feed comparator circuits having preset limit detectors to initiate an alarm signal when the temperature signal exceeds a predetermined value. The comparator circuits also feed a display device to indicate the temperature of the liquid.
REFERENCES:
patent: 3022766 (1962-02-01), McKinley
patent: 3960011 (1976-06-01), Renz et al.
patent: 4321860 (1982-03-01), Hazen
patent: 4506218 (1985-03-01), Brown et al.
patent: 4536851 (1985-08-01), Germanton et al.
Sedra, et al., Microelectronic Circuits, Holt, Rinehart & Winston, N.Y., 1982, pp. 183 and 184.
Maltais Andre
Nadeau Andre
Capati Anne Marie F.
Maritonex Inc.
Rowland James L.
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