Combustion – Timer – programmer – retarder or condition responsive control – With test circuit checking or analyzing flame sensing...
Patent
1982-05-12
1984-07-03
Barrett, Lee E.
Combustion
Timer, programmer, retarder or condition responsive control
With test circuit checking or analyzing flame sensing...
431 46, 431 78, F23N 500
Patent
active
044577010
ABSTRACT:
The invention relates to a control circuit for a semi-conductor power element, comprising a circuit generating a signal synchronous with the variable current supply signal of the semi-conductor power element, and a logic circuit with high input impedance to receive directly, on the one hand, the said synchronous signal and, on the other hand, the low strength detection signal and which is such that the delay circuit is combined to the high input impedance logic circuit to prevent the production of control pulses on the electrode controlling the semi-conductor or power element, if one of the components of the control circuit should become faulty.
The invention finds an application in burner control and safety devices.
REFERENCES:
patent: 3902839 (1975-09-01), Matthews
patent: 4082493 (1978-04-01), Dahlgren
patent: 4088984 (1978-05-01), Muramoto et al.
patent: 4324542 (1982-04-01), Challet
Barrett Lee E.
Constructions Electriques R.V.
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