Abstract: A circuit breaker is provided of the push-pull type for use in the cockpit of an aircraft wherein the plunger of the circuit breaker is illuminated upon the opening of a circuit. The illumination immediately attracts the pilot's attention so that corrective action can be taken. A bi-metallic strip bows when it is heated due to overloading of the circuit causing the plunger to be extended and to complete a secondary circuit to a light located within the head of the plunger. A number of the circuit breakers are electrically interconnected to provide a visual indication to the pilot that a fault condition has occurred in one of the monitored aircraft circuits. In addition, an indicator is available to inform the pilot that a second fault condition has occurred subsequent to the occurrence of a first fault condition while the first fault condition remains.

Abstract: The system is intended primarily for use in multi-engined aircraft although it has great utility in any installation having an engine and a generator driven thereby. A kit for each engine includes a generator drive train connected to the engine to be driven thereby, a driving formation for connection to a generator, and a coupling or clutch in the drive train to decouple the generator in case of mechanical or electrical failure. Signal means may be located in the cockpit in the pilot's field of view to indicate generator failure. A switch operable by the pilot in response to the failure signal acts to remotely cause decoupling of the generator. The active signal operates means to deactivate any other decoupling switch to prevent mistakenly decoupling a properly functioning generator. Cross-connection switch means are connected to all engines and generators and may be actuated to electrically connect an active generator to the engine having the decoupled generator.