Abstract: An electromagnetic switch includes: a stationary contact; a movable contact movably provided with respect to the stationary contact; a coil configured to move the movable contact to a side of the stationary contact by means of current conduction; and a shaft provided inside the coil such that the movable contact is provided at an end portion thereof, wherein a snap-fit portion having a pair of hooks disposed to face each other is provided at an end portion of the shaft, and the movable contact is fixed between the end portion of the shaft and the hook.

Abstract: The present invention relates to an auxiliary contact block. The auxiliary contact block comprises a housing and a tool free latching mechanism. The tool free latching mechanism further comprising a stationary member integral to the housing and a latching bar. The latching bar comprising a button in communication with a moveable member by a central body.

Abstract: A modular terminal for a molded case circuit breaker by which various types of terminals can be joined together and configuration and assembly are simplified, the modular terminal comprising a plurality of terminal bases each of which is provided for each phase, a terminal which is detachably supported at each terminal base, and a joint piece which connects a pair of the terminal bases adjacent to each other to form a terminal module.

Abstract: An arrangement used to fix conductor rails for multi-phase switchgears to allow for mounting and dismantling the conductor rails in a simple manner is provided. The switchgear housing (4) comprises straight guide elements (16) which are used to receive the mounting position using the conductor rails (8). Each conductor rail (8) includes a continuous bore (22) which is covered by a receiving bore (24) when in a mounted position, the receiving bore being formed in the switchgear housing (4). Insertion journals (28) extend through the continuous bores (22) into the receiving bores (24) associated therewith and are combined with a connecting web (30) in order to form an insertion comb (26) made of an insulating material.

Abstract: A circuit interrupting device has a circuit interrupter with a stationary contact and a moveable contact. The movable contact is movable relative to the stationary contact between a closed position that allows current to pass through the circuit interrupter and an open position separating the contacts and preventing current from passing through the circuit interrupter. The movable contact is controlled by a solenoid assembly. The movable contact is connected to a plunger of the solenoid assembly by a turnbuckle and weld break assembly. The turnbuckle and weld break assembly permits adjusting the contact wipe distance and generates a hammer force to break any welds between the contacts of the vacuum interrupter.

Abstract: The circuit breaker is intended for installation in a low-voltage distribution board having a socket and having at least two busbars which are guided parallel, are held on the socket and are each associated with one pole conductor of a multiphase power supply system. This circuit breaker has an enclosure as well as a plug contact for making contact with one of the busbars. The plug contact can be positioned as a function of the position of the busbar with which contact is to be made, and is held on a contact mount, which can be moved transversely with respect to the busbars and can be locked to the circuit breaker enclosure. In a circuit breaker such as this, a pole conductor change from one busbar to another busbar can be carried out quickly and without the use of any tools.

Abstract: An apparatus is disclosed for mounting an auxiliary contact external to an electromagnetically operated electrical contactor so that the auxiliary contact may be operated by a carrier of the contactor. The apparatus comprises: a wall of the auxiliary contact; at least one rib projecting from the wall of the auxiliary contact, the at least one rib arranged to be matingly inserted into at least one slot in an external side of the contactor so that the rib attaches the auxiliary contact to the contactor; and, a flexible lever formed from a portion of the wall, and the lever locks into a mating structure when the rib attaches the auxiliary contact to the contactor in order to lock the auxiliary contact in position on the external side of the contactor.

Abstract: An additional switchblock is laterally connected to a contactor of a magnetic control relay. The terminals of the switchblock and contactor are provided for on the front side opposite that of the support bar. A hook connection is used between the two lateral surfaces. When the hooks formed on the additional switchblock are inserted into corresponding recesses in the contactor, a formed-on ring portion of the additional switchblock actuating element engages with a switch position indicator extending from the front side of the contactor so that the actuating coupling is assured. The detent preventing the additional switchblock from sliding back away from the contactor is accomplished via detent arms formed on the additional switchblock arms and having wedge shaped projections which engage recesses in the contactor cover.

Abstract: A circuit breaker with an auxiliary switch actuator mechanism is disclosed. The actuator mechanism includes an actuator member and a locking member. Upon resetting of the breaker, the actuator member is moved by the arm carrying the movable contact of the main breaker mechanism to a position where it is locked by the locking member. Tripping the breaker causes the locking member to unlatch and release the actuator member to switch the auxiliary switch contact to allow indication of the tripped state, while manual operation of the breaker does not alter the condition of the auxiliary switch.

Abstract: A movable contact bridge (12) is associated with contact carrier (7) by means of a stirrup (28), a pressure spring (25) and a resilient blade (45). The stirrup has two hooks (35, 36) which hold the blade in place and facilitate removal and positioning thereof because of the gap (60) separating these hooks. This contact bridge is advantageously used in contactors of minimum rated power greater than 100 amps.

Abstract: An electromagnetic relay having a three part housing. A first or base housing part positions a magnet coil and a stationary magnet pole piece. A second or front housing part positions springs for positioning the coil in the base part, provides a seat for armature return springs and a guide for an assembly including a magnetic armature. A third or a middle housing part maintains the return springs and armature assembly assembled in the front housing part. The front and middle housing parts have rectangularly shaped confronting surfaces which are spaced so the areas of engagement between the middle housing part and the front part are limited to the areas at the four corners of the front and the middle housing parts. The relay also includes a movable contact actuator that is held captive by a cover for the relay.

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.

Abstract: An improved electromagnetic switching apparatus including a housing, a plurality of movable contact bridges mounted on a contact bridge carrier, first fixed contact elements which extend around one end of the contact bridges and are coupled to terminal elements for the first fixed contact elements, and electrically-separated second fixed contact elements disposed at the other end of the contact bridges on both sides thereof. The improvement of the invention comprises the provision of means for selectively electrically connecting the second fixed contact elements to a common terminal element.

Abstract: An electromagnetic switching apparatus including a housing, movable contact elements mounted on a plurality of contact bridges in the housing, electrically-connected fixed contact elements disposed on both sides of the contact bridges adapted for contact and electrical connection with the movable contacts and the contact bridges, and electrical insulation means for interrupting the electrical connection between the fixed contact elements and the contact bridges in two terminal positions of the contact bridge carrier. The improvement comprises at least one end of the contact bridges extending outwardly beyond the area of contact between the movable contacts and the fixed contacts. The electrical insulation means are movably supported in the switching apparatus housing so as to be operatively engageable in at least one position with the extended ends of the contact bridges for interrupting the electrical connection between at least one of the contact bridges and the fixed contact elements.

Abstract: A stationary contact of an electromagnetic contactor having an insulating contact mounting plate, is part of a contact combination that includes a contact arm, a retainer and a fastening screw for electrically and mechanically securing the contact combination to a terminal of the contactor. The contact is mounted on the forward end of the arm and the retainer, constructed of spring sheet material, engages the rear of the arm. The front of the arm and the retainer cooperate to form a recess which receives and grips an L-shaped formation of the mounting plate.

Abstract: Three cartridge housings are mounted one on top of the other and atop a magnet assembly. Each defines a set of four compartments which receive and hold a contact module containing a set of contacts. The magnet assembly includes a magnetic circuit comprised of a resiliently mounted stationary yoke assembly and an armature assembly which is fastened to a drive yoke that is slidably mounted to the magnet housing for reciprocal motion along an actuation axis. The reciprocal motion of the drive yoke is coupled to each of the contact modules by a series of drive links which extend upward through the center of the cartridge housings and associated crossbars which extend laterally outward therefrom.

Abstract: The present invention relates to a guidance system for the movable element of a contactor.The shaped sections constituting the walls have channels formed during the extrusion thereof wherein are located pivoting and elastic restoring members which guide the contact unit.

Abstract: One or more sets of auxiliary contacts are contained within a cartridge which mounts to the side of an electromagnetic contactor. The cartridge snaps into position and is firmly supported at each of its ends. A cam member slidably mounts to the cartridge and couples to the contactor actuator. It includes a sloping cam surface which engages a cam follower pivotally mounted within the cartridge and translates the sliding motion of the contactor actuator into a pivotal motion which operates the auxiliary contacts.

Abstract: The relay contact adjusting arrangement of this invention involves the positioning of the header assembly and motor assembly of the relay in a fixed spaced relationship prior to final assembly, with the fixed and movable contacts in opposed pairs, and associated with an optical comparator so that enlarged images of the opposed contacts can be seen, after which adjusting tools are used to bend the supports of the fixed contacts for adjusting the spacing successively for each opposed pair of contacts to a spacing indicated on the screen of the comparator. The device includes a means for energizing the relay coil to hold the armature in a desired position while the adjustment takes place, and provides for the indexing of the assemblies through 180.degree. to allow both the normally open and normally closed contacts to be viewed on the comparator screen.