Abstract: A screw terminal for an electrical connection of an eye of a cable comprises a casing, a first clamping plate axially movably but not rotatably mounted in the casing, the axial movement of the first clamping plate being limited by an inner surface of the casing. The first clamping plate defines a taphole and has laterally bent up, axially extending spring tongues. A second clamping plate is fixedly mounted in the casing, the second clamping plate defining a taphole axially aligned with the tap hole in the first clamping plate. A clamping screw axially moves the first clamping plate between a closed position and an open position limited by the inner casing surface wherein the space between the first clamping plate and the second clamping plate has a maximum axial length.

Abstract: An electrical screw-on terminal assembly is provided for a connection to wires or cables, particularly those with eye connectors. The terminal assembly has a housing and a screw which, as it is screwed in, passes through a first plate, and when fully screwed in, a second plate. The first plate is mounted so that it cannot rotate or be moved longitudinally, while the second plate is mounted so that it can be moved longitudinally but not rotated. When the terminal is completely open, the second plate abuts a stop on the housing and is held in this position by a resistive force, which can be overcome by the screw, so that the aperture onto which the cable or cable eye is inserted remains unobstructed. The screw can be screwed into a bore in the first plate until it engages the second plate. The bore in the first plate has no internal thread, but has projections which engage the screw threads.

Abstract: In a snap locking mechanism for rotary switches an operating shaft (4) operable by a switch handle can be rotated against the force of an energy-storage mechanism and each lock-in position is occupied with at least partial release of the energy-storage mechanism. The energy-storage mechanism is formed by axially acting compression springs (8) and acts on a driver ring (6) exhibiting slopes in the peripheral direction which interacts with another driver ring (13), couplable with the operating shaft, exhibiting a corresponding counterprofile with slopes. A coupling for dragged slaving (28, 29) is provided between the two driver rings (6, 13). Handle-side driver ring (6) carries stops (11) on its front facing away from these slopes, which interact with counterstops (12), integral with the housing, when they reach the snap position of the locking mechanism.

Abstract: In a manually actuated on-off switch with electromagnetic release, a component part (9) opening and closing the switch contacts and an actuating member, in particular a rotary control grip (2), are designed as separate parts and for being coupled, noting that the component part (9) opening and closing the switch contacts is loaded by a spring in direction out of the take-along position for the closing movement. The component part (9) and the actuating member (2,6) are at least at their mutually facing front surfaces or, respectively, engaging surfaces (7a, 8a) formed of a material being conductive for the magnetic flux and are designed for being coupled one with the other in a force-locking manner by means of the electromagnet.The coil (10) of the electromagnet is, in this case, preferably arranged for being put to voltage via auxiliary contacts (16).

Abstract: A switch comprises switch members movable in an operating direction for opening and closing an electric circuit, a solenoid drive for moving the switch members in the operating direction, the solenoid drive comprising an armature having an operating movement normal to the operating direction of the switch members and a core, a push rod whereto the switch members are coupled for movement therewith, the push rod comprising a gear rack, and a pinion segment meshing with the gear rack. The push rod and the pinion segment are located between the armature and the core and are surrounded thereby, the pinion segment is pivotal about an axis extending transversely to the push rod and is engaged by the armature, the operating movement of the armature pivoting the pinion segment and moving the push rod and switch members coupled thereto in the operating direction.

Abstract: A switching mechanism in a star-delta-switch with a rotatable and axially displaceable switch-shaft prevents rotation of the switch-shaft from the off- to the delta-connection position in the direction of rotation from the delta-connection to the off-position in one of the axial positions while axial displacement of the switch-shaft to another axial position enables the switch-shaft to be rotated from the off- to the delta-connection, rotation of the switch-shaft in the other axial position causing the switching mechanism to reset to the one axial position.

Abstract: The disclosure relates to a resetting device on a rotary switch for resetting the latter when the mains voltage falls below a predetermined limiting value, in which an electromagnet connectable to the power supply and equipped with an armature is provided, and this armature releases or blocks, in dependence on the state of excitement of the magnet, a return mechanism which subjects the rotary switch to a resetting from a switching position into a definite starting position.With such a resetting device, the armature (8) of the electromagnet (7) controls at least one displaceable blocking tappet (13), which blocking tappet, in the case of a switch located in a switching position different from its starting position and with the armature (8) pulled up, rests against a projection (19) or engages into a depression of at least one restoring mechanism (16, 16') loaded by a return spring (21,22) and in drive connection with the drive or switch shaft (1).

Abstract: A rotary switch comprising a rotatable driving shaft and a coaxial driven switching shaft has a coupling arranged between the shafts for indexing the rotary movement of the switching shaft in response to the rotation of the driving shaft. The coupling includes driving and driven coupling parts respectively keyed to the driving and driven shaft, the coupling parts having peripheries coaxial with the shafts. A spring having two ends respectively engaging the coupling parts is tensioned in the direction of the coupling part peripheries and a blocking device controlled by the rotary position of the shafts in relation to each other respectively blocks and unblocks the rotary movement of the driven coupling part.

Abstract: A step switch having contacts actuatable in predetermined indexed positions comprises a rotatable driving shaft and a coaxial driven shaft rotating an indexing mechanism into the indexed positions for actuating the contacts. A coupling is arranged between the shafts for indexing the rotary movement of the driven shaft in response to the rotation of the driving shaft. The coupling includes a driving coupling part keyed to the driving shaft, a driven coupling part keyed to the driven shaft, the coupling parts having peripheries coaxial with the shafts, a spring having two ends respectively engaging the coupling parts and being tensioned in the direction of the coupling part peripheries, and a shape-conforming blocking device controlled by the rotary position of the shafts in relation to each other for respectively blocking and unblocking the rotary movement of the driven coupling part.

Abstract: An apparatus for mounting an electrical switch in a cut-out of a switch board comprises a support ring between the switch body and the rear side of the switch board, the support ring surrounding the axially extending switch grip and having claws arranged for engagement with the cut-out at the front side of the switch board. An axially biased housing is mounted between the support ring and the rear side of the switch board, with springs pressing a circumferential portion of the housing against the rear side of the switch board. A coupling ring between the support ring and the switch grip has a radially outwardly directed groove in engagement with a radially inwardly directed rib on the support ring whereby the coupling ring is held against axial movement by the support ring.

Abstract: A clutch for disconnecting a drive shaft of an electric switch from a switch actuating element which includes a rotary shaft, particularly useful for the return or trip-free release of a rotary switch, comprises a differential gearing coupled between the rotary shaft of the actuating element and the switch drive shaft. The gearing includes a first gear connected to the rotary shaft for rotation therewith, a second gear connected to the drive shaft for rotation therewith, idler gears meshing with the first and second gears and transmitting rotation from one to the other, and a housing carrying the idler gears and mounted for rotation. A releasable latch carries the idler gears and is arranged selectively to permit and stop rotation of the gearing housing.