Abstract: The contact spring (7) comprises two outer lamellar branches (71, 72) and two inner lamellar branches (73, 74) subjected to the action of a prebiasing member (6) integral with an actuating member. Two stationary stops (9, 10) are arranged on either side of a transverse connection portion (77) of the spring (7) and have each a plane contact surface extending at least throughout the length of the portion (77) and susceptible of extension throughout one portion of the length of the two outer branches of the spring (7). The actuation force, as well as the stroke of the prebiased spring, may be very important with respect to the size of the switch, the electric contact being suddenly established with an appreciable contact force.

Abstract: A miniature push-button switch having and improved switch body wherein a plurality of fixed contacts are each formed by bending an electrically conductive plate material to have one end acting as a contact portion, for contacting a movable contact which is adapted to slide in the longitudinal direction of the switch, and the other end acting as a switch terminal. The switch terminals are arranged in order along the direction substantially perpendicular to the longitudinal direction of the switch and comprise a normally open, NO, switch terminal, a common, C, switch terminal and a normally closed, NC, switch terminal interposed between the NO switch terminal and the C switch terminal.

Abstract: A molded case circuit breaker includes an improved system for internally venting gaseous arc products to control the internal gas pressure increase and expansion during an arc interruption. The system includes a first gas expansion chamber disposed proximate to a stationary electrical contact of a pair of separable electrical contacts of the circuit breaker and a second gas expansion chamber disposed proximate to an electrically insulating arc chute barrier that is positioned at an end of an elongated arc chute remote from said stationary electrical contact. The arc chute barrier and the stationary electrical contact are physically configured to effect the rapid internal venting of gaseous arc products to the first and second chambers.