Abstract: A contactor which includes a contact bridge holder for opening and closing a first plurality of contacts of an electric circuit, a second plurality of additional contacts for each electrical phase and a coil connection of an associated magnetic system, respectively; the magnetic system including thermo trippers and magnetic trippers for selectively operating the first plurality of contacts, three actuation members each mounted for pivoting movement, the first of the actuation members being connected to a slider which is in turn connected to the second plurality of contacts, the second actuation member being operative by the magnetic tripper, the third actuation member being operative by the thermal tripper, the first and second actuation members having end portions which are normally in engagement when the trippers are not actuated and the second plurality of contacts are open, and the normally engaging end portions of the first and second actuating members are moved out of engagement upon the operation of ei

Abstract: A quick-mount device for a contactor which includes a housing in which is mounted a coil assembly having a coil and electrical terminals carried by a base plate. Opposite walls of the contactor housing include legs each carrying oppositely directing tangs or projections. A first of the oppositely directed tangs engaging the lateral edges of the base plate and a second of the oppositely directed tangs engaging lateral edges of a support rail. The opposite directed tangs are so relatively positioned that a screwdriver can be inserted therebetween for manually freeing the second tangs from engagement thereof with the support rail, yet maintaining the engagement of the first tangs with the base plate of the coil assembly, thereby permitting both quick-mounting and quick-demounting of the contactor relative to its associated coil assembly and/or support rail.

Abstract: A circuit-breaker which includes a housing, an actuator device positioned in generally upstanding relationship to and centrally of the housing, thermal trippers and magnetic trippers mounted on one side of the actuator device, an electromagnetic drive including an armature for operating an associated element, the electromagnetic drive being mounted on a side of the actuator device opposite the thermal and magnetic trippers, a pair of pivotally connecting links, the links being operated by a pivoted yoke by energization of the armature, one of the links having a nose received in a slot of a slide, and the magnetic and thermal trippers also having noses received in slots of a slide such that selective turn-on and turn-off conditions can be achieved manually or automatically.

Abstract: A switch gear which includes a housing have first and second sides and a third side therebetween, at least one main contact bridge in the housing displaceable between two ON-OFF switch position, a spindle rotatable by a handle and carrying a body having a cam slot receiving a cam follower of a contact bridge holder, the contact bridge holder carrying contacts for effecting the two switch positions with associated pairs of fixed contact rails carried by the housing, the fixed contact rails being connectable by connector screws to electrical hook-up leads at the respective first and second housing sides, first and second separate housing compartments adjacent the first and second housing sides and carried associated ones of the connector screws, the first and second contact rails being connected through the respective first and second separate housing compartments for connection to the electrical hook-up leads by the connector screws, and the first and second separate housing compartments being selectively moun

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: A circuit breaker including a housing, coil connector screws and associated connection rails within the housing, a module in a casing received in a recess of the housing, the module being adapted to limit or attenuate voltage peaks, the module having electrical connectors for electrically connecting the module to the connection rails otherwise than through the coil connector screws, the electrical connectors being a pair of metallic leaf springs each in contact with one of the connection rails, the case being of a generally rectangular configuration with a corner recess at two corners thereof, and each corner recess mating with a projection of the housing and being snap-connected thereto.

Abstract: A motor safety switch which eliminates much of the costs of conventional wiring, material and labor, the motor safety switch being formed of a plurality of assembled independent components; a first of the components including a switch unit having a contact system, a thermal tripper and a magnetic tripper; a second of the components being an electromagnetic drive unit; a third of the components being a modular contact unit; and the independent components are maintained by mechanical connectors in selected assembled relationship to include either all of the aforementioned independent components or selective subassemblies thereof.

Abstract: A double pole switching device has a plunger which is longitudinally movable in a housing against a spring force and has at least one contact bridge provided with a movable contact switch to operate with immovable contacts, and an element is provided for forcibly opening of adhering or welded contacts and includes a U-shaped bracket with a connecting web located between the contact bridge and a contact pressure spring and two legs cooperating with stepped extensions in the housing so that the bracket and the contact bridge over a first part of the stroke of the plunger are forcibly taken along, and the legs of the bracket over a further part of the stroke are spread outwardly and release the plunger.

Abstract: In a switching bridge arrangement for an electrical switch, such as a circuit breaker, wherein a plurality of contact bridges, biased by contact springs, are movable in a plurality of windows provided in the switch housing, each contact spring is formed as a leaf spring pressed in the respective window against the contact bridge and is provided with a recess in which a projection formed on the wall of the window is engaged.

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 an electromagnet for an electric switch, particularly safety switch, an armature and a magnetic core are each formed of a pack of laminations connected to each other by rivets. The laminations of the armature and the magnetic core are equally shaped and formed so that the pack of laminations of the armature matches the pack of laminations of the core in assembly.