Abstract: A light waveguide switch which has a base member with a flat surface sub-divided by a longitudinally extending channel, a flat plate of a constant thickness being pre-cut to form a tongue and a carrier member, waveguides secured to the tongue and carrier member to be in alignment when the tongue engages the flat surface of the carrier member and an adjustable stop for defining a second switching position characterized by the adjustable stop being formed by a resilient arm secured on the carrier member to extend across the tongue adjacent the free end thereof, and having a projection forming a point contact second stop with the tongue and having the free end of the arm being connected to the carrier member by an adjustment screw so that a projection on the arm forms an adjustable stop to determine the second position.

Abstract: An actuating magnet is provided for a circuit interrupter. The magnet yoke is assembled from three solid segments of magnetic material to produce a U-shaped core. One or more coils are disposed on the core loop, and the center of the yoke is interrupted by a series of aligned holes.

Abstract: A vacuum switch is provided with a drive lever (9) which may pivoted for switching on and switching off a vacuum switch tube. Between the drive lever (9) and the movable contact bolt (7) of the switch tube (1) there are provided a spherical bowl (13) and an adapted spherical hinged cavity (14), as well as a force transmission part (15). If the unit switch-on position is considered wherein the medial line (22) of the drive lever (9) is at right angle with respect to the longitudinal axis (23) of the movable contact bolt (7), the bowl central point (24) of the hinge device is shifted with respect to the medial line (22) of the drive lever (9) in the direction of the switch tube in a proportion corresponding to approximately half of the stroke of the movable contact bolt (7) during switch on and switch off. Thereby, the lateral displacement, more precisely the lateral forces exerted on the movable contact bolt (7) upon switching on and switching off are decreased down to a negligible value.