H - Electricity – 05 – B
Patent
H - Electricity
05
B
309/69, 309/69.3
H05B 1/02 (2006.01) G05D 23/24 (2006.01) H02H 5/04 (2006.01)
Patent
CA 1317338
TITLE OF THE INVENTION: CONTROL SYSTEM AND METHOD OF MAKING THE SAME ABSTRACT OF THE DISCLOSURE: A control system and method of operating the control system are provided, the system having a supervisory circuit for detecting failure of the system and disabling a high energy control circuit of the system, the supervisory circuit having a capacitor therein for sustaining an on condition of a supervisory transistor that is in series with an output relay driver transistor of the high energy control circuit, and a temperature sensing unit that is disposed intermediate a microcomputer of the system and the supervisory circuit for continuing the charging of the capacitor only as long as the temperature sensing unit is sensing an output temperature effect of a heating unit of the system that is below a predetermined high temperature limit for the system and that terminates the charging of the capacitor when the sensed temperature is above the predetermined high temperature list.
612226
Fowler Daniel L.
Kadwell Brian J.
Gowling Lafleur Henderson Llp
Robertshaw Controls Company
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