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 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: 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 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.

Abstract: An electric switching device of the type having a contact system includes two stationary contact bars and movable contact bridges for interconnecting the bars. To convert the switching device from a circuit maker to a circuit breaker, or vice versa, a control member is provided in the form of a shiftable slide having insulating projections which in one end position of the slide are displaced between one bridge and a contact bar while the other projection is out of the range of movement of the bridges, and in the other end position the other insulating projection interrupts the contact between the other bridge and the assigned contact bar.

Abstract: Disclosed is an electric switching device of the type having a contact system including two stationary contact bars and movable contact bridges for interconnecting the bars. To convert the switching device from a circuit maker to a circuit breaker, or vice versa, there is provided a control member in the form of a shiftable slide having insulating projections which in one end position of the slide are displaced between one bridge and a contact bar while the other projection is out of the range of movement of the bridges, and in the other end position the other insulating projection interrupts the contact between the other bridge and the assigned contact bar. In a modification, the converting member is in the form of a swingable arm cooperating with a slidably supported cam track which is turnable by 180.degree..

Abstract: Disclosed is an electromagnetic switching device of the type having a stationary core and a movable armature pivotably mounted in a guiding support. To adjust and re-adjust the stroke of the armature, the latter is provided with a removable pivot shaft having a polygonal central portion matching the corresponding passage in the armature. The cylindrical ends of the carrier shaft are coaxial with its axis of rotation, whereas the sides of the polygonal portion are unevenly spaced from the axis. An end face of the shaft is provided with indexing marks denoting the selected angular position of the shaft relative to the armature.

Abstract: A contact device for low voltage switch devices, includes at least two stationary contact bars with contact pieces, as well as at least one electrically-conductive contact bridge which is disposed in a contact bridge support and is movable by means of a spring force. In order to provide a good contact device wherein a weight and material saving is obtained, wherein simultaneously a switch-on impact of the contact is prevented and wherein a good adaptability of the movable contact pieces to the position of the stationary contact pieces is obtained, the contact bridge is made from a flexible material and a contact pressure spring for each of the two movable contact pieces is provided.

Abstract: In a switch or relay and, more particularly, a power or auxiliary switch or relay with a contact system mounted in a housing, as well as a magnet system which actuates the contact system, considerable difficulties are encountered when the contacts of the contact system are disposed in at least two planes which are disposed at different distances from the mounting plane. In such a case, the contact connecting zones which are facing away from the mounting plane are covered by the wiring for the contact connecting screws which are further displaced from the mounting plane and therefore are not accessible. Since switches or relays of this type are usually installed in large numbers in rows and in a compact arrangement with respect to each other in switch or relay boxes, a predetermined standard width for the switches or relays should not be exceeded.

Abstract: In a switch, in particular a power, control or starter switch, a contact system and a magnetic system are provided in a housing whereby the magnetic system actuates the contact system. The contact system is provided with contact bars having rigid contact pieces, as well as actuable bridges with movable contact pieces which are actuated by means of a common bridge, whereby each bridge and the associated contact bars are mounted in a switch chamber. Furthermore, a switch-on contact with a self-locking contact is provided. In switches of this type, it is typically required to hold a switching operation for a longer time period, without necessitating the manually pushing down of a push key. The required separate switch-on contact is typically mounted in a separate large housing.

Abstract: A contactor comprises a contact system arranged in a housing with a magnet ystem activating the contact system. The housing, at the end thereof remote from the side of the housing at which the housing is mounted in a switch box, is closed off by a cover. The contact system comprises contact bars with contact terminal screws and stationary contact pieces, and jointly activatable bridging members having movable contact pieces and operating as normally closed and/or normally open switches. The contact bars with their contact terminal screws are arranged displaced relative to one another in planes having differing spacings from the end of the housing at which the housing is mounted on a switch box, in such a manner that each contact terminal screw is freely accessible, even after all wiring has been connected on.