Abstract: In a miniaturized automatic circuit breaker with a casing of insulating material forming an arc-extinguishing chamber and a housing for contacts which are closed and opened and for a pair of terminals for connection to ends of leads outside the circuit breaker, one of the terminals is multifunctional and comprises a screw clamp opening in a first face of the circuit breaker in order to receive ends of external leads and spring-clip terminal opening in the rear face of the circuit breaker for receiving a blade-like terminal of an external lead, and an insulating diaphragm is interposed between the multifunctional terminal and the arc-extinguishing chamber and forms, with the casing, at least one vent duct opening in the first face and insulated electrically from the multifunctional terminal.

Abstract: A modular electric apparatus is provided with inherent fingerproof protection for clamp terminals, including at least one clamp terminal housed within an insulating body and provided with a fixed jaw and a moveable jaw, the body being provided with an opening for introducing an electric termination between the jaws, and further including an insulative diaphragm interconnected to the moveable jaw to gradually shut off the opening.

Abstract: A set of assembly elements for facilitating concurrent electrical connection of a plurality of modular automatic circuit breakers. The circuit breakers are installed as a package on a rail in a supply and protection station for an electric system. The set of elements includes a bar of an electrically conductive material, and mating means of the quick-coupling plug-and-socket type, the socket means being associated with each breaker, and the plug means being associated with the bar.

Abstract: An apparatus with remote control features for tripping off magnetothermal switches comprises at least one switch having a central core supporting trip-off linkages wherein a voltmeter coil is housed with each switch being connected to a respective one, e.g. a lamp, of user electric appliances.The apparatus also comprises a pushbutton control connected to each voltmeter coil in each magnetothermal switch for remotely and simultaneously operating the trip-off linkages to thus turn off simultaneously each electric appliance, while enabling function regaining by operating the corresponding switch locally.