An accessory module (104) for use with a circuit breaker (10) is configured for mounting to the breaker, and has a rotor (142) which follows the movement of the circuit breaker blade (24) in the breaker by means of a coupling member (118) passing through a passage (110) in the circuit breaker wall. A...http://www.google.es/patents/US5003139?utm_source=gb-gplus-sharePatente US5003139 - Circuit breaker and auxiliary device therefor
