Abstract: An actuation attachment includes a central slider formed at one end with a push button and at the opposite end with a holding piece for an actuator. The slider is inserted in a cylindrical sleeve so as to be movable in axial direction either relative to or in conjunction with the sleeve but engaging it for joint rotation. The sleeve is inserted in a cylindrical bore of a housing to move in axial direction and to rotate about its central axis. The slider is formed with an axially directed slot for accommodating opposite rear ends of two locking pins which are guided in corresponding radially directed bores in the sleeve. The locking pins are urged one from the other by a biasing spring. The cylindrical bore of the housing is formed with axially directed first and second guiding grooves for engaging rounded front ends of the locking pins. Each of the guiding grooves is separated by an inclined stopping surface and a radially directed stopping surface.

Abstract: An apparatus for selective installation of electrical components such as signal lights, switching devices, transformers and the like, includes a mounting housing, a plurality of mounting elements each being formed with two flexible webs arranged opposite each other, the webs of two joining elements slidably fitting each other and the mating surfaces of the webs being provided with flexible dowel connections in the form of a projection on one web and a corresponding recess on the adjoining web; the elements are connectable by resilient split pins to bores on a common rail which receives the electrical components; the housing is provided with upwardly directed hollow dowels connected to spacer sockets and each accommodating a catch spring formed with a detent; the common rail is inserted with its bores onto the dowels until the detents engage the upper surface of the rail and the latter rests on the spacer sockets.

Abstract: In a switching device for an end snap-action switch which includes a support, a displaceable actuating push rod and contact bridges two double-armed pivotable levers are connected to the support to move the contact bridges in two opposite directions within a housing.

Abstract: In devices for mounting electrical devices, in particular switch, command or signal devices on a plate, like a bottom plate of a switch box or an assembly plate of a switch box or switch board of the type with at least one mounting bar for the devices disposed parallel to the plate as well as with two vertically-extending supports mounted on the plate for each mounting bar and with screw connections between the supports and the mounting bar, the difficulty exists that it is hard to reach the screw connections between the supports and the mounting bars, because of tight space conditions due to a tight arrangement of the devices relative to each other and due to the wiring which leads to the devices.

Abstract: A switch having a housing and within the housing a control plunger formed with a transverse opening through which a contact arm passes transversely to the direction of movement of the plunger; a tension spring urges the contact bridge against the plunger and the free ends of the bridge cooperate with stationary contacts mounted in the housing; another compression spring urges the plunger into its starting position; the free arms of the contact bridge support, respectively, detaching blocks having arresting edges engageable with the plunger in the event when, during the movement of the plunger, the contact arm accidentally sticks to the stationary contacts; the detaching blocks are provided with abutment surfaces cooperating with guiding edges on the inner wall of the housing to disengage the projection from the plunger.