A circuit breaker includes separable contacts for movement between a closed position and an open position. An operating mechanism moves the separable contacts between the closed and open positions and has a closed state and an open or tripped state which corresponds to the open position. A trip circuit...http://www.google.fr/patents/US5926355?utm_source=gb-gplus-shareBrevet US5926355 - Electrical switching apparatus employing battery-powered indicator
