Inverter lockout circuit

H - Electricity – 05 – B

Patent

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315/23

H05B 41/29 (1980.01)

Patent

CA 1095972

58-BD-6296 ABSTRACT OF THE DISCLOSURE An emergency lighting system includes a switching transistor inventer circuit for starting and operating a fluorescent lamp from a battery upon failure of line voltage. A lockout arrangement serves to shut down inventer operation should the lamp be removed from its fixture. Included in an interlock in the lamp fixture and circuitry responsive to an open condition at the interlock to ground the input to a system controller inhibit function thereby to effect removal of battery power from the inventer circuit.

272271

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