Abstract: A center bolt LBOR switch 12 comprising a support ring 12-4 and a center bolt or threaded boss 12-2, and a nut 12-3 for securing the switch 12 to a transformer tank wall is disclosed. The disclosed invention allows a switch or other device to be mounted to the wall of a transformer tank without welding and without distorting the tank wall.

Abstract: A pair of pivoted links positioned at opposite sides of a movable armature and reversely oriented with respect to each other, have a pivotal connection at their opposite ends to a movable contact carrier and intermediate their ends to the armature whereby movement of the armature is amplified in movement of the contact carrier to permit reduction in the air gap between the armature and electromagnet core without incurring a corresponding reduction in contact carrier movement.

Abstract: A relay with a base member accommodating a magnet system is provided whereby connecting leads are provided for a contact arrangement. A cap is mounted onto the base member and includes cap terminal lugs that are part of connecting webs in the inside of the cap. An unreleasable electrical connection is provided between the connecting webs and the connecting leads. One thus obtains a contact and/or coil connection possibility via the housing cap instead of or in addition to terminal lugs disposed on the underside of the base.

Abstract: A miniature molded case circuit breaker is adapted for use with load conductors having ring lug terminations by extending the circuit breaker load terminal conductor through the terminal recess and beyond the molded housing. An adapter includes an insulative shield member having an open slot in which the load terminal conductor terminates for connection to the ring lug on a load conductor. The adapter further includes an insulator which seats snugly in the terminal recess of the housing and through which the load terminal conductor extends. A bifurcated neck on the insulator extends through an opening into the shield member. The shield member is secured to the circuit breaker by projections which snap into grooves in the neck portion of the insulator and a cantilevered resilient finger which engages a catch on the molded housing.

Abstract: A contactor/circuit-breaker type switch device having at least one power switching pole comprising fixed contacts (1, 2) cooperating with mobile contacts (5) coupled to an actuator member (15) actuated by a solenoid (8) or by a lock lever (12) linked to a lock (23), characterised in that the lock lever (12) actuates the mobile contact actuator member (15) directly and in that the mobile parts (10) of the solenoid actuate the actuator member (15) via a coupling lever (13) adapted to be coupled to said mobile parts (10) by a demountable coupling (19, 221) associated with locking means (14) conditioned by the status of the lock.

Abstract: A circuit breaker contact position indicator is mounted on the same support platform as the circuit breaker electronic trip unit and contains a micro-switch to provide indication to the trip unit of the status of the circuit breaker contacts. The switch interacts with the circuit breaker operating mechanism crossbar cam by means of a spring-loaded paddle attached to the trip unit support platform.

Abstract: An electromagnetic switchgear having an explosion chamber that can be removed from its bottom part and a bridge support that projects into the area of the explosion chamber and bears movable contact parts. In order to safely lock by simple means the contact support when the explosion chamber has been removed, locking means and the explosion chamber are specially designed with means that make the locking means slide in a link into a position where the contact support is unlocked when the explosion chamber is connected to the bottom part of the switchgear.

Abstract: A contact enforcement apparatus for an electric switch includes two electro-magnetic bars. The first electro-magnetic bar is disposed between a crossbar of the switch and a moveable contact arm. The crossbar carries the moveable contact arm and the first electro-magnetic bar such that the electrical contacts of a stationary contact arm and the moveable contact arm are opened and closed by the crossbar. The second electro-magnetic bar is in U-shape and has a front wall and a back wall, between which the moveable contact arm is at least partially inserted when the electrical contacts are closed together. When a "fault" current passes by the electrical contacts, an attractive force between the electro-magnetic bars is largely increased. This attractive force overcomes a repulsive force caused by the "fault" current which tends to open up the electrical contacts, so that the contact between the moveable and stationary contacts remain closed.

Abstract: A motor module for operating a circuit breaker having a front face and a switch exposed at the front face, wherein the motor module includes: a housing; a motor disposed in the housing and having a switch engaging member for operatively associating the motor with the switch; and an engaging member associated with the housing for engaging the housing with the front face of the circuit breaker, with the switch engaging member engaged with the switch, whereby the housing is mounted over the front face of the circuit breaker with the motor operatively associated with the switch.

Abstract: The modular relay has a base (1) on which a relay system (2, 3, 4) is constructed, as well as a printed circuit board (6) which stands upright on the base. Contact elements (41c, 42c, 43) of the relay are directly connected to flat connectors in the base, via conductor elements. Further conductor elements in the base likewise form flat connectors as connections for a modular circuit which is arranged on the printed circuit board. All conductor elements of the base additionally form solder connecting pins (51b to 56b), which are integrally formed, which all emerge in a row on one side wall of the base, and which are soldered to the printed circuit board in the lower edge region of said printed circuit board. This results in a compact modular structure for a relay having a maximum number of connecting elements, the allocation of these connecting elements being variable for different modular circuits.

Abstract: An improved relay includes a base (20) integrally molded defining a pair of notches (24) for matingly receiving a mounting structure (26) comprised by a motor assembly (10) of the relay, so as to determine the relative positions of the motor assembly (10) and the base (20) with a high degree of reliability. The other components of the relay are similarly secured in corresponding predetermined positions by fitting within other mounting structures molded into the base member (20).

Abstract: In the case of the relay, connecting elements which are anchored in the base body are passed out of the base body (1) at the side and are bent at right angles to the base plane as push-in posts (12). The push-in posts (12) are formed by sections which are rolled in in the form of sleeves or channels are bent outwards from the contour of the relay structure with an axis at right angles to the base plane and form pushing-in shoulders (14) with their respective upper edge.

Abstract: A surface mountable reed switch, which is particularly useful for implantable devices such as pacemakers, defibrillators, drug pumps and neurostimulators. The switch includes reed contacts hermetically sealed within a tubular glass envelop, wherein the reed contacts extend through ends of the envelop to provide external contacts. A trilobular cross section mounting bar is attached to each external contact such that the reed switch can be mounted on a mounting surface such as a ceramic substrate or the like. A protective housing contains the reed switch while the attached trilobular bars extend from a side of the housing to allow communication between the switch and the mounting surface. Further, a testing apparatus is provided for evaluating how the housed reed switch will perform when installed in the implantable device and subjected to stray (must not operate) as well as designated (must operate) magnetic fields.

Abstract: The present invention provides a circuit breaker having a terminal nut retainer 10 for securely holding a nut 65 in a fixed position adjacent and below a circuit breaker terminal 60. The circuit breaker is placed in a circuit by securing a source electrical connector to a source terminal and/or a load electrical connector to a load terminal. A screw 61 is used to fasten the electrical connector 67 to its respective terminal 60. The nut 65 for the screw 61 is held in a fixed position by the terminal nut retainer 10. The terminal nut retainer 10 has a nut retaining cavity 14 defined by walls which hold the nut 65 and keep it from turning while the screw 61 is tightened to establish a tight electrical connection between the connector 67 and the terminal 60. The terminal nut retainer 10 is held in position by a sliding and locking engagement between projections 30 and 34, respectively, on the terminal nut retainer 10 and slots 52 and 54, respectively, in the circuit breaker casing.

Abstract: The invention provides an improved heat seal structure for electronic devices. A heat seal structure comprises a base of synthetic resin formed integrally with an outwardly extending projection, with a gas vent running through the base and projection, the gas vent being sealed off by melting the projection, the improvement that the gas vent is configured generally in the shape of the letter V or Y bifurcating in the outward direction. In another embodiment, the projection has an annular extension disposed on the outward side of the base and adapted to be melted for a double seal effect. In another version of the structure, heat-sealing is performed with a sealing member or composition interposed in the gas vent. In still further embodiments, heat sealing is performed using a sealing member melting at a temperature below the melting point of the resin forming the base.

Abstract: A unit structure for a hazard switch used for automobiles. A knob (1) is mounted at a position adjacent to the driver's seat, the knob (1) has a moving block (2) at the rear position of the knob (1). A flasher unit (50) is disposed at the terminal block (B) of the hazard switch (4). The terminal block (B) is composed of a first terminal block (B1) and a second terminal block (B2) mechanically coupled to the first terminal block (B1). Upon an upper surface of the second terminal block (B2), there are mounted electric parts of a discrete type, such as a flasher relay (Ry), a shunt resister (R), electrolytic condensers (C1) and (C2), a jumper wire, and the like. The unit structure of the invention reduces the number of intermediate harnesses, terminals fabrication processes, and parts, and minimizes the size of the hazard switch per se and the current by changing the electric circuit and switch.

Abstract: In an electromagnetic relay in which a contact mechanism 50 provided on a base 10 is driven by a card 60 which slides and moves in parallel to the axis of an electromagnet block 20 provided in the base 10 as the electromagnet block 20 is magnetized and demagnetized, the base 10 comprises a guide portion 17 for restricting the card 60 in its position. This prevents variations in the performance characteristics so that high productivity and long service life of contacts can be obtained.

Abstract: In an electromagnetic switching device, particularly in a contactor, a connecting piece, which is flexible in all directions, is fitted between the armature (9) and the contact bridge carrier (6). An intermediate plate (8) carrying elastic bars (14, 15) is placed between the armature (9) and the contact bridge carrier (6) so that it rests torsion-free against the contact bridge carrier (6). The elastic bars (14, 15) act upon both end regions of a coupling bolt (10) guided through a hole (19) in the armature (9), as well as in a direction perpendicular to it upon both end regions of the armature (9).

Abstract: An accessory module for monitoring and controlling the status of a circuit breaker. The accessory module attaches to the side of a circuit breaker and has a mechanism similar to the mechanism in a circuit breaker. The mechanism has multiple positions that correspond to multiple states of a circuit breaker Actuators transform relatively large-scale motions of the mechanism into small-scale motions and transfers these to buttons on switches. Depressing these switches depending on the position of the mechanical assembly makes and breaks circuits that are in communication with a remote site. A circuit board designed specifically to hold and locate the switches and actuators and provide tracings that can withstand high currents. The invention further provides a terminal plug having a pull tab which can be grasped to remove an otherwise inaccessible terminal plug. A dual-function base, which serves both as an enclosure and as a spacer.

Abstract: A motor vehicle starter is of the type comprising an electromagnetic contactor, the winding of which is connected to the positive pole of the battery of the vehicle through an auxiliary control relay, the movable contact of which is arranged to connect electrically together two contact pads which are themselves connected, respectively, to the input terminal of the contactor winding and to the positive contactor terminal, and of the type in which the contactor includes at one of its axial ends a closure hood of insulating material in the general form of a cylindrical pot, with the two terminals of the contactor being disposed in the base of the hood. The auxiliary control relay is disposed inside a housing defined by the contactor hood.

Abstract: The electromagnetic switching device, especially contactor consists of an electromagnet (2) fastened in its housing, with a core (2) and an armature (14). Mounted on the core (2) is a magnet coil (17) carrying the coil assembly (7) and coil terminal parts (8) protruding only in one direction. The coil assembly (7) can be installed into the housing in two 180.degree. offset positions, around the winding axis of the magnet coil (17). The electromagnetic switching device can be used with unchanged inscription at 180.degree. offset coil terminal parts (8).

Abstract: An electromagnet device for an electromagnetic contactor is formed of a frame with an opening, a movable-contact supporter slidably disposed in the frame, a movable contact supported by the movable-contact supporter, a movable core connected to the movable-contact supporter, and a stationary core for attracting the movable core. The stationary core includes a base plate for closing the opening of the frame, at least one columnar arm core fixed to the base plate to extend therefrom, and at least one pole piece fixed to the arm core at a side opposite to the base plate. The pole piece provides attracting force to the movable core when the stationary core is energized. In the electromagnetic device, a device for partly interrupting a magnetic path of the stationary core is formed. The interrupting device reduces remanent flux in the stationary core when the stationary core is deenergized.

Abstract: A general purpose electromagnetic contactor that can be easily mounted on a printed circuit board. A general purpose electromagnetic contactor includes main terminals and auxiliary contact terminals, and connecting faces of the main terminals and connecting faces of the auxiliary contact terminals are positioned at different levels or planes. Adjustment terminals are connected to the auxiliary contact terminals to position the connecting faces of the adjustment terminals in the same level as the connecting faces of the main terminals. Therefore, the general purpose electromagnetic contactor can be mounted on a printed circuit board.

Abstract: An improved contactor control system comprising several modules, such as a contactor module, an overload/controller module, a communication module, a bell alarm module, and a power terminal module which are electrically interconnected through a plug-in unit, and mechanically interconnected through one or more snap-in units, and which modules can be interchangeable and arranged relative to the overload/controller module according to a particular industrial application.

Abstract: A plurality of terminal blocks are secured to a molded case circuit breaker by a bracket assembly which includes a mounting bracket placed against a side wall of the circuit breaker molded case. A back-up plate is inserted in a pocket formed between the outer wall and an inner wall of the molded case and electrically isolated from the cavity containing the circuit breaker operating mechanism. Fasteners extend from the mounting bracket through the outer wall and engage the back-up plate. Since the pocket is electrically isolated from the circuit breaker operating mechanism, the back-up plate, and particularly the fasteners, can be made of metal for a solid, durable connection.

Abstract: A conversion kit in the form of a flux shifter unit that interfaces with the circuit breaker operating mechanism and is installable without dismantling the circuit breaker is proposed herein. The flux shifter unit responds to the electronic trip unit to articulate the circuit breaker operating mechanism and separate the circuit breaker contacts upon occurrence of an overcurrent condition. Tolerance take-up for various manufacture's designs is achieved by expansion springs while electrical interface with remote accessories and other electronic trip units is achieved by button-actuated switches.

Abstract: The cutoff structure for a circuit breaker comprising, for each pole, a contact bridge (17) lodged in a push button (20). The push button is guided in a fixed cage (21) mounted in the box of the circuit breaker, the cage being fitted with passage windows (24) for the contact bridge and with an upper stop (26) for the bridge, so as to constitute a telescopic sub-assembly.

Abstract: The manufacture of an electrical contactor is simplified by a construction including a base 22, a contactor assembly 20 having electrical contacts 32, a magnetic core 26, an armature assembly having an armature 30 movable in proximity to the core 26 and capable of moving the contacts 32 between circuit making and circuit breaking positions, and a spring 36, the spring 36 being integrally formed in the base 22 and resiliently supporting the magnetic core 26. The spring 36 controls the bounce in the contacts 32 when the contactor is energized by dissipating the kinetic energy imparted to the armature 30, the core 26, or both.

Abstract: In a molded case circuit breaker with an interchangeable thermalmagnetic trip unit, the C-shaped heater transformer core is permanently held in place in the casing by a load bus strap with the gap in the core facing the trip unit. When the interchangeable trip unit is inserted into the molded casing, a magnetically permeable member mounted in the trip unit is aligned in the gap in the heater transformer core. The bimetal of the trip unit is fixed at one end to an electrically conductive sleeve surrounding the magnetically permeable member and forming the secondary of the heater transformer. The length of the magnetically permeable member is selected to establish the current conditions at which the bimetal trips the circuit breaker.

Abstract: An electrical switching device such as a motor starter is adapted to be controlled through control signals in control wiring and includes separable contacts; an operating mechanism for opening and closing the separable contacts; first terminals for interfacing the control signals to the operating mechanism; a modular surge suppressor circuit for suppressing a surge associated with the control signals, with the modular surge suppressor circuit including second terminals for engaging the first terminals and interfacing the control signals thereto; and a modular terminal block for interfacing the control signals in the control wiring to the modular surge suppressor circuit.

Abstract: An electromagnetic contactor device including an enclosure formed by a base unit and a housing unit assembled together and accommodating the power poles and a solenoid having a coil the body of which has power supply terminals on one side, said enclosure providing between the base unit and the housing unit a housing adapted to receive the power supply terminals, characterised in that the enclosure has symmetrically disposed relative to the first housing a second housing also formed between the base unit and the housing unit and having substantially the same cross-section as the first housing so that it can receive the side of the coil provided with terminals after the coil is turned around, the housing opposite that receiving the terminals being closed off.

Abstract: A protective switching device equipped with power poles, for which mobile contacts are supported on a contact support, a protection assembly with magnetic and/or temperature tripping capable of detecting overloads or overcurrents on each pole current path and a lock operated by a manual control knob. The lock includes a mechanism to control direct opening of power contacts of a circuit breaker or similar device in a manual control, or opening of an auxiliary contact that interrupts the current in the coil in the control electromagnet of a contactor-circuit breaker or similar device.

Abstract: A circuit breaker 10 includes a housing and an operating mechanism 12 contained within the housing. An indicating arrangement is carried by the operating mechanism 12 and is displaceable relative to the housing under the action of the operating mechanism 12 for indicating the status of the operating mechanism 12.

Abstract: A hybrid switch comprises an electromagnetic contactor for conducting a current flow after the current making operation, a semiconductor switch device connected in parallel with a main contact of the electromagnetic contactor, for conducting operations of making and breaking a current; and a semiconductor unit body including a case having a square shape in section for housing the semiconductor switch device, and conductor plates which are respectively connected to terminals of the semiconductor switch device and drawn out from sides of the case, end portions of the conductor plates being bent to form main circuit terminals, the semiconductor unit body being mounted on a top portion of the electromagnetic contactor, and the main circuit terminals of the conductor plates drawn out from the semiconductor unit body being fastened to main circuit terminals of the electromagnetic contactor by using terminal screws, respectively.

Abstract: The base plate module of an electromagnetic switching device, specifically a contactor, is mounted on a base plate (1). The base plate module contains the core (2) of the electromagnet, a magnet coil (5), a printed circuit board (10) with its connected ancillary devices, as well as the contact plugs (16, 17) and terminals (24, 25), both of which are accessible from the outside. Printed circuit board (10) is mounted on base plate (1) and is located between base plate (1) and core (2), which is mounted on the base plate. Strip conductors (12, 13, 14), on the side facing core (2), feature several spring-loaded stub contacts (19, 20) and/or contact plugs (21, 22), all of which are vertically mounted on circuit board (10). Flange (7) of coil module (6), which is oriented toward base plate (1), provided with terminals (23) of magnet coil (5). With magnet coil (5) in the mounted position, terminals (23) of magnet coil (5) are in contact with the spring-loaded stub contacts (19) of strip conductors (13).

Abstract: A compact current detection unit which detects a failure in a relay terminal and provides a relay terminal array which has a failure detection function and is compact and easy to assemble. The current detection unit includes two symmetrical bobbins; a core located within compartments of bobbins and has an air gap in it; holes in the bobbins which correspond to air gap in the core; coil wound on the compartments; and a circuit board fastened to the side of one of the bobbins on which a Hall element is mounted. A Hall element is inserted through and fixed in position by the holes in the bobbins and the air gap in the core. If a current is flowing through the coil, the lines of magnetic force generated in the core are detected by the Hall element located in the air gap. If no current is flowing, no lines of force are detected.

Abstract: A removable keypad controls the electronic trip unit used within state-of-art electronic circuit breakers. The keypad allows inputting and displaying relevant circuit interruption information. Unauthorized access to the trip unit settings is prevented by blocking off the keypad "ENTER" key while still allowing access to the keypad's remaining function keys.

Abstract: A support plate for a circuit breaker has a longitudinal slot centrally located in the support plate, a free end with a tab for affixing an elongated bimetal of a trip assembly, a longitudinal edge opposite to the free end and terminating in proximity to a latch ledge of a cradle of an operating mechanism, opposed lobes each having a transverse edge, and an opening in each of the transverse edges. The support plate extends partially along a planar wall of a base of a housing for the circuit breaker. Molded pins in the base of the housing of the circuit breaker enter the openings in the transverse edges of the support plate for securing the support plate to the base. These molded pins extend outwardly to space the support plate away from the cradle of the operating mechanism. Bent over tabs are provided in one of the lobes for abutting a cover of the circuit breaker to maintain the fixed position of the support plate in the housing base.

Abstract: An adapter for mounting a cylindrical shell containing a magnetic reed switch and an elongated permanent magnet in respective holes in a metal door and metal door frame. The purpose of the adapter is to enable the same reed switch and actuating magnet to be used for installation on a wooden door in which the elements are held in holes in the wooden door and wooden door frame in a press fit relationship, or in a metal door in which the elements are held in the metal door and metal door frame in a self-locking relationship, thereby precluding any need for producing different reed switches and actuating magnets for wooden and metal doors. The adapter has a particular configuration to fit around the cylindrical shell of the reed switch or the elongated permanent magnet, to hold the elements locked in place in the adapter, and the adapter itself is equipped with teeth, so that when it is inserted into the hole in the door or in the frame, the teeth engage and interlock with the door or frame.

Abstract: A magnetic coil, a magnetic contactor using the magnetic coil and a method for manufacturing the magnetic coil are disclosed wherein the magnetic coil does not need increased winding space and can be configured as having two coil terminals protruding in only one direction or as having three coil terminals. A three terminal-type magnetic contactor which uses the magnetic coil does not require an increased amount of space for the winding process, and the size of the three terminal version is reduced while still meeting insulation requirements. The magnetic coil maintains reliable electrical connection even when subjected to mechanical vibration.

Abstract: A miniature ground fault circuit breaker having a housing assembled from molded sections has stiff conductors supporting the toroidal coils of the ground fault circuit in position in one molded section and aligning connectors secured to the stiff conductors for easier assembly of the molded housing sections.

Abstract: A contact system for current limiting units which are combined with power circuit breakers or motor circuit breakers. The object of the invention is to improve the reliability of the current limiting unit equipped with such a contact system, while reducing the time and effort required to assemble and install such a contact system. The invention teaches that the contact systems can be assembled from a contact carrier with a stationary contact tip and a subsystem preassembled with little force, which can be installed in the arcing chambers in a stable condition and under the force of contact compression springs. The subsystem contains the wiper provided with the moving contact tip, which wiper is mounted with a direct electrical connection to a supply lead. Supports in the subsystem limit the movement of the wiper in both directions.

Abstract: A solid state overload relay mechanism designed for minimizing the forces required to open an electrical contact associated therewith in the event of a current overload in a protected circuit, and further designed for overcoming residual magnetism in a solenoid initiating the opening of the contact. The contact includes a pair of stationary contacts supported by a base and a pair of movable contact supported by a contact carrier. A latch defines a notch which is normally engaged with a lever. When so engaged, the contact carrier is positioned such that the movable contacts are in contact with the stationary contacts. When the lever becomes disengaged from the latch, the contact carrier is moved and contact between the movable contacts and stationary contacts is broken. The latch is provided with a counterbalance weight to aid in minimizing the force required to return the latch to its original position after the mechanism is tripped.

Abstract: An apparatus for securing a wire with a longitudinal axis includes a glass filled polyester base having a recess for housing a segment of the wire therein; and a glass filled polyester cover for at least partially covering the segment within the recess, the cover having a resilient finger which is generally transverse to the segment, the segment being generally deformed about the resilient finger within the recess in order that tension on the wire along the longitudinal axis flexes the resilient finger which, in turn, forces a portion of the segment against a side of the recess in order to secure the segment therein. The wires may have a polytetrafluoroethylene insulation.

Abstract: A high ampere-rated circuit breaker which meets the electrical code requirements of the world market. The electronic trip unit is contained within the circuit breaker cover and is configured to prevent access to the accessory unit selection switches. Rejection pins on the back of the trip unit insure correct correlation between the trip unit and circuit breaker ratings.

Abstract: A molded insulator has a bottom wall, opposed sidewalls, and a transverse end wall extending between the sidewalls but spaced from the end of the bottom wall to define an opening in the bottom. A distribution lug is inserted from an open end of the insulator against the end wall, and under projections on inner surfaces of the sidewalls to trap the insulator against the end wall, and under projections on inner surfaces of the sidewalls to trap the insulator against up and down movement. The lug is attached to a circuit breaker terminal at the opening in the bottom to trap the end wall between the lug and the circuit breaker, blocking withdrawal of the insulator. A depending rib provides distal end support, while lateral ribs abut edges of barriers in the breaker housing to maintain the assembly properly aligned for electrical spacing.

Abstract: A high ampere-rated circuit breaker which meets the electrical code requirements of the world market. The circuit breaker electronic trip unit is contained within a trip unit recess in the circuit breaker cover. Accessory units are contained within an adjoining accessory compartment recess. A separate auxiliary switch accessory module is positioned within the trip unit recess to interface with the circuit breaker operating mechanism and provide external indication as to a trip occurrence.

Abstract: An auxiliary terminal block for an electrical switching device includes a molded block and at least one terminal for terminating the internal wiring and external wiring of the switching device. The molded block has a first wiring channel for the external wiring, a second wiring channel for the internal wiring, and a partial partition between the two wiring channels. The partition has a slot for engaging and locking the terminal after the internal wiring has been terminated. The partition may include two walls having a generally constant width therebetween. Shoulders or tabs may be disposed on each of the walls for engaging and locking the terminal to the block. Alternatively, the partition may include two walls which are at least partially resilient and which form a generally V-shaped opening between the two wiring channels. A shoulder may be disposed on each of the walls for engaging and locking the terminal to the block whenever the terminal is fully inserted within the partition.

Abstract: A guidance system for an interrupter switcher comprising a first guide positioned in between the contact support and the movable contact system of the interrupter, and a second guide inserted into the stationary contact system of the interrupter. According to the invention the second guide is capable of receiving the nozzle of the movable contact system. An interrupter with the guidance system is assembled by positioning the first guide between the contact support and the movable contact system, positioning the second guide within the stationary contact system, inserting the nozzle of the movable contact system into the second guide, and mounting the stationary contact system in the interrupter housing. The assembly of an interrupter with a guidance system results in a self-adjusting switcher interrupter capable of maintaining a stable alignment between the interrupter's movable and stationary contacts while opening and closing the interrupter.

Abstract: A miniature circuit breaker with two thermal-magnetic poles has an electronic trip device providing ground fault, and sputtering arc fault (if desired), protection located entirely in a large central compartment of a molded housing between compartments housing the two mechanical poles. The molded housing is assembled from a top base and top cover forming a compartment for the thermal-magnetic trip device of the first pole, and a bottom cover and a bottom base forming the compartment for the second mechanical pole. A hollow center piece mates with the top and bottom bases to form the single, large electronics compartment.