H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/28, 323/9
H05B 41/16 (2006.01) H05B 41/392 (2006.01)
Patent
CA 1132198
D-21,515 ISOLATOR CIRCUIT FOR USE WITH FREQUENCY SENSITIVE SWITCHING CIRCUIT ABSTRACT OF THE DISCLOSURE An isolator circuit for use with a switching cir- cuit for energizing a ballasted load in response to a control signal of preselected frequency super- imposed on AC power circuits which supply the load. In the switching circuit, a triac is gated to con- duct the AC power to the load by a circuit including an impedance element and a series resonant LC net- work tuned to the frequency of the control signal. The control signal may be one of a plurality of control signals having different frequencies super- imposed on the power circuits. The isolator circuit is connected between the triac and the load and comprises a plurality of series connected parallel resonant LC circuits each tuned to block a respective one of the control signals. A series choke blocks spurious signal voltages.
341824
Cohen Sheppard
Ingalls Paul H.
Plumb John L.
Gte Sylvania Incorporated
R. William Wray & Associates
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