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 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 protection switch device has power poles whose mobile contacts are carried by a contact-holder, a magnetically and/or thermally tripped protection system to detect overloads or overcurrents on each pole current path and an actuator mechanism operated manually by an actuator button. This mechanism includes a permanent magnet lever cooperating with a magnetizable contact operating arm and a magnetizable tripping arm, movement of which is controlled by the protection system. The mechanism also includes a manual actuator for directly opening the power contacts of a overload relay or like device or, after turning the manual actuator button, opening an auxiliary contact to interrupt the current in a coil of a solenoid actuating a contactor/overload relay or like device.

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: 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 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: An overload relay comprising three modules, each enclosed in molded housings: the basic unit, the contactor-side terminal block and the load-side terminal block. Both terminal blocks have phase connectors which can be the same or different in terms of their type of connection and/or their clearance between phases and/or their phase height. The terminal blocks can be mechanically and electrically detachably connected to the basic unit. At least the basic unit or the terminal blocks have means for fastening to a mounting plate. In an additional solution, the terminal blocks are part of a series which is compatible with at least two different contactors. A typical field of application for the invention is the protection of electric motors.

Abstract: A relay module, by which a time required when a motor is optionally mounted on a machine tool or removed therefrom can be omitted. The relay module comprises only a case and terminal screws of an electromagnetic contactor for a motor from which internal components are removed. The relay module is disposed when the motor is not connected and an electromagnetic switch is disposed when the motor is connected. Further, the relay module or electromagnetic switch is wired at all times. When the motor is optionally mounted on the machine tool, it suffices only to replace the relay module thereof with the electromagnetic switch and no wiring job is additionally required. Further, when the motor is removed, it suffices only to replace the electromagnetic switch with the relay module and a job for removing the wiring is not necessary.

Abstract: A removable calibrating unit comprises a body, a front panel and a part in the form of a reversible ramp. The reversible ramp comprises an end close to the front panel and an end away from the front panel. Extraction of the removable unit is achieved by means of a pin comprising an extraction lug. When the pin is subjected to rotational movement in one direction, the lug moves from the end close to the front panel to the end away from the front panel and results in extraction of the unit by applying thereon a force separating the unit from the circuit breaker.

Abstract: A molded case circuit breaker containing a digital trip unit is field-tested for both electronically-induced as well as mechanically-induced test conditions by means of a portable test kit unit. The test kit circuit components are contained within a miniature test plug that temporarily connects with the circuit breaker trip unit by insertion within the rating plug receptacle formed within the circuit breaker cover. A compact power supply plug is received within the test plug to provide operating power to the circuit breaker trip unit components and associated accessories.

Abstract: An electronic auxiliary contact for a contactor has at least one switch element controllable to the conducting and non-conducting states for the purpose of indicating the position of the contact bridging member in the contactor, and a switch-activating element mechanically connected to the contact bridging member and capable of activating the switch element. The switch-activating element incorporates at least one activating element, and the switch-activating element makes no mechanical contact with the switch element. The system provides a reliable method of monitoring the operation of a contactor.

Abstract: A two-pole switch for DC current has a housing formed by a pair of open shells abutting each other to enclose components of the apparatus. Each shell rigidly holds a stationary contact, and an actuator is pivotally coupled to the shells. A pair of movable contacts are pivotally attached to the actuator so that each movable contact touches one stationary contact when the actuator is in a first position and the contacts are separated when the actuator is in a second position. A spine plate is between the shells and electrically separates the two stationary contacts and arc extinguishing chambers. A solenoid is within the housing aligned with the contacts and drives the actuator between the second and first positions to close the contacts.

Abstract: A housing is provided for a circuit breaker. The circuit breaker has contacts capable of being in an open state or a closed state, of movement between the open and closed states, and of generating a hot gas in consequence of that movement. An electronics module is provided for controlling movement of the contacts from the closed state to the open state. The housing has a first portion housing the contacts and a second portion housing the electronics module. The second portion is formed of a material subject to damage by the hot gas, and the first portion is constructed to protect the second portion from damage by the hot gas. The first portion is ideally formed of a thermosetting material resistant to damage by the hot gas and the second portion is ideally formed of a thermoplastic material, which reduces the cost of manufacturing the housing. A quick-mounting construction for assembling the second portion with the first portion further reduces the cost of assembly.

Abstract: A circuit breaker including a trip unit interlock. The trip unit interlock provides a trip unit having a plug connectable with a mating plug which is slidable with respect to the circuit breaker. The trip unit engages a pair of pins mounted to the circuit breaker when the trip unit is in its operating position. The pins are oriented to prevent separation of the plug from the receptacle during circuit breaker tripping. Since it is undesirable to insert a trip unit into a circuit breaker where the trip unit is not compatible with the circuit breaker, the pins and openings in the trip unit are configured such that they will not mate if the trip unit is not appropriate for the circuit breaker. When the trip unit is in its operating position, the trip unit holds an interlock lever for the contact operating mechanism of the circuit breaker in a position where the contact operating mechanism may close the contacts and hold the contacts closed when the circuit breaker is in its ON state.

Abstract: A latching block to be coupled to an electromagnetic switching device, which holds the switching device in the working position by locking the mechanism of the switching device which carries out the switching action. The latching block has a housing, a rack which can be coupled to the mechanism which carries out the switching action with a positive lock, and a lever which acts on a ratchet wheel. The engagement of the lever and the ratchet wheel can be released for unlocking.

Abstract: A floating magnet mounted in an electromagnetic switch assembly. The magnet has confronting faces contacted by confronting faces of a movable armature. The movable armature is caused to contact the floating magnet by a magnetic field created when electrical current is applied to a current carrying coil. The magnet has a mounting face opposite its confronting faces. A mounting stem is anchored in the mounting face and extends through an aperture in a mounting base. The stem laterally protrudes to prevent it from pulling through the aperture in the mounting base. The magnet rests on an energy absorbing medium, such as a spring or rubber. The energy absorbing medium is disposed between the mounting face of the magnet and the mounting base. The energy absorbing medium is resilient to provide magnet flotation. Magnet flotation allows the magnet to float to align its confronting faces with those of the armature when the armature is caused to contact the magnet.

Abstract: An electric circuit-breaker of the magnetic arc extinction type includes a fixed contact member comprising two electrically insulative parts. An auxiliary part of the fixed contact member is connected to an auxiliary terminal and includes an arc deflector branch so disposed that when the contacts open the current flows in opposite directions in this branch and in the mobile contact member.

Abstract: The locking mechanism is inserted between two contactor banks and comprises two sliding pieces connected to a pair of tillable cams, which are biased towards an inoperative position by a spring. The cams are connected to the sliding pieces themselves by pivot emerging from each one of them. The pivot is located in a transversal throat of the sliding pieces themselves. When one of these pieces moves, the respective cam tilts and comes in between and blocks the other one, preventing the respective sliding piece associated to the latter from being able to move. Thus, the pulsator of the other contactor bank will not be able to be operated.

Abstract: An electromagnetic switching device comprises a housing containing a switch contact space and connection contact space, and a driving space formed by a basic body in which the magnet and coil are lodged. The parts of the connection contacts and coil connections of the pre-assembled contact carrier with return spring and of a switch space cover with an insertion device that can be releasably fastened to said cover, which are to be accommodated in the housing, are assembled in succession from a direction perpendicular to the sliding direction of the contact carrier and retained by interlocking connections.

Abstract: A protective switch device such as a relay switch includes at least one pole having at least one moving contact that cooperates with a stationary contact and a magnetic or thermal trip mechanism for assuring protection against overloads and excess currents and that acts on a control mechanism actuating the moving contact and that can be activated by a rotary control knob rotating about a pivot pin. Recocking of the control mechanism is possible from a "tripped" to an "off" or from a "tripped" to an "on" position. The control mechanism includes a lever for opening the contacts that pivots from an on position corresponding to the closing of the contacts to a position corresponding to the opening of the contacts. The opening lever is associated with a pivoting cocking mechanism, which is able to bring back and hold the opening lever in the on position. A trip mechanism is provided which is able to control the mechanical separation of the opening lever and the cocking mechanism so as to free the opening lever.

Abstract: A drawer-type circuit interrupter is constructed with a first contact member having an open-and-close contact member, an open-and-close operation mechanism for operating said first contact member, an interrupter main body having a second contact member and a mounting frame having the external line contact terminals, wherein the second contact member is a movable-type provided with an open-and-close contact portion that is contactable with and separable from the first contact member on the one end thereof and a drawer contact member that contacts with an external line contact terminal on the other end thereof, and a compression spring for urging the second contact member into a direction for contacting the external line contact terminal on the other end of the second contact member. When the interrupter body is in the connected position the drawer contact portion on the other end of said second contact member and said external line contact terminal are into contact.

Abstract: A switch device using a main switch coupled to a monostable auxiliary switch through a releasable coupling is disclosed. In this device, the auxiliary switch and the main switch are closed in succession by simultaneous movement of their respective contact-holders and are opened in the reverse order by virtue of the presence of the releasable coupling which is released during closing and engaged during opening.

Abstract: The coil holding current of a contactor is regulated to the lesser of two measurements of coil current during each cycle of the full-wave rectified control voltage to compensate for induced flux in the coil generated by load current through the main contacts of the contactor, thereby preventing uncontrolled drop out of the contactor.

Abstract: An electrical power disconnect switch is disclosed which provides for mechanical or manual tripping operation, as well as electrical or automatic tripping operation. The switch includes a latch pin, a switch body including a handle member, and fixed and movable contacts. A biasing spring biases the contacts to an open position. The latch pin has an electrical trip coil surrounding it to cause the latch pin to releasably hold the switch body in a position such that the contacts are closed. The latch pin is retracted from the switch body by manual depression of a handle member, causing the contacts to open. Alternatively, the latch pin is released from the switch body to open the contacts when current ceases to flow through the electrical trip coil. The current flowing through the electrical trip coil is supplied from a protection circuit. In an automobile application, the protection circuit may be, for example, a hood open or crash detection circuit.

Abstract: A current switching device includes stationary contacts, and movable contacts which are movable between a position in which the movable contacts engage the stationary contacts and a position in which the movable contacts separate from the stationary contacts. The movable contacts are mounted on a movable contact holder. A magnetic locking element includes a permanent magnet and is pivotally mounted about a fixed axis. An actuation armature is connected to the contact holder and is movable to move the contact holder. The actuation armature is movable in proximity to the magnetic locking elements such that the actuation armature is locked to the magnetic locking element by magnetic attraction with the movable contacts engaging the stationary contacts. An opening armature is movable between a rest position and a position in proximity to the magnetic locking element, such that the opening armature is locked to the magnetic locking element by magnetic attraction.

Abstract: A switch assembly includes a switch actuator assembly which is operable to actuate a plurality of switches. The switch actuator assembly includes a pushbutton which is manually depressed to move a core relative to a coil from a first position to a second position. As the core moves to the second position, the plurality of switches are actuated and a magnetic field from the core cooperates with a base or frame member to hold the core in the second position. As the pushbutton returns to its unactuated position, a force transmitting lever moves into an extended position in engagement with a coil switch actuator arm. Subsequent depressing of the pushbutton causes a drive pin connected with the pushbutton to depress the force transmitting lever to open a coil switch and deenergize the coil. As the pushbutton is subsequently released, the core and drive pin move upwardly. The coil switch then closes and a retainer pin connected with the core pushes the force transmitting lever back to a retracted position.

Abstract: A protective switch device such as a relay switch is provided with at least one pole having contacts that can be separated. It includes a control mechanism (5) that can cause the opening and closing of contacts (21, 31) and that can be actuated by a protective device (4) that can act in case of electrical failure, and a manual control button (6) controlling an electromagnet (7) for operating the contacts. A moving trap door (11) opens and closes an opening of the box so as to make it possible to change the coil of electromagnet (7). The trap door (11) cooperates with a trap door locking element (81) that can be displaced between a closed position where it immobilizes the trap door on the box and an open position making it possible to open the trap door.

Abstract: An electromagnetic contactor comprising a housing, the housing being adapted to receive internally thereof a stationary armature, a coil subassembly, return springs, and a block subassembly, the block subassembly comprising a block adapted to receive terminals and a carrier subassembly, the carrier subassembly comprising a carrier member adapted to receive and retain a movable armature, the housing having internally thereof a plurality of detents adapted to be overridden by the block subassembly and to snap over exposed surfaces of the block subassembly to lock the block subassembly, the stationary armature, and the coil assembly in the housing, whereby to complete assembly of the contactor without fasteners; and a method for making the contactor.

Abstract: A current switching device comprises, in a box, at least one polar current path, disposed between two connecting terminals. The at least one polar current path comprising, in series, a break pole formed by at least one stationary contact and at least one mobile contact, a protective thermal tripping device having a bi-metal strip surrounded by a heater element and a protective magnetic tripping device having a coil wound around a coil form in which a mobile core slides. A wire of the coil being connected by an intermediate conductor to an end of the heater element. A wire of the heater element comprising a lower end which is substantially straight and without curvature, the lower end of the wire of the heater element being soldered to the intermediate conductor. The intermediate conductor being soldered to a substantially straight lower end of the coil wire. The two tripping devices being carried by a support which is slidably removable from the box.

Abstract: A multiple-pole ground fault interrupter, enclosed in an insulated housing, formed with multiple compartments, includes ground fault detection circuitry for detecting ground fault current that can be a personnel hazard. The ground fault interrupter includes a single trip solenoid assembly having multiple windings, each winding corresponding to one of the poles. The trip solenoid is mounted on a printed circuit board and electrically connected to the ground fault detection circuitry disposed thereon. The printed circuit board together with the trip solenoid assembly is disposed in a single compartment which reduces the amount of interconnection wiring between compartments, which, in turn, results in a reduced cost to manufacture the device. The use of a single trip solenoid assembly also results in the use of less components which further reduces the cost of manufacturing the device.

Abstract: Molded case circuit breaker having collapsible toggle linkage with rectangular cross section knee pin non-rotatably held within open rectangular slots in upper link, bifurcated movable contact fingers loosely guided for pivotal movement about fixed pin to break contact welds, helical compression springs biasing bifurcations against faces of a stationary connector, trapezoidal cross section shaft biasing shaft against a fixed corner of clamping strap and frame, increasing clamping force and increasing tool clearance, operating handle which changes pivot point moving to RESET position, reducing lateral force component of operating springs for reliable return of handle to OFF position, dual stops for movable contact fingers to spread impact forces along fingers, greater contact separation in poles not containing operating mechanism, slot motor laminations providing metal reinforcement to separate arc chamber housing which is cooperatively interlocked with base to distribute structural strength, terminal cover wi

Abstract: An overload relay includes a base (22) with electrical contacts (162, 164) thereon. A lever (116) including a contact actuator (140) is in proximity to the contacts (162, 164) and a pivot (122) mounts the lever (116) on the base (22) for pivotal movement between first and second positions. A releasable latch (106) normally holds the lever (116) in a particular one of the positions and a spring (144) is interposed between the base (22) and the lever (116) at a location spaced from the pivot (122) to bias the lever (116) toward the other of the positions by applying a bias thereto in a generally predetermined direction. The direction and location are such that when the lever (116) is in a latched position, the bias will provide a relatively small force tending to move the lever (116) toward the unlatched position and further is such that as the lever (116) moves towards the first position, the bias produces an increasing force tending to move the lever (116) towards the unlatched position.

Abstract: The low dissipation compact circuit breaker of the present invention selectively conducts breaker current in a circuit to be protected. The compact circuit breaker is in an enclosure surrounding at least a stationary contact and a moveable contact. This moving contact selectively assumes one of two bistable states, a contiguous closed state or a noncontiguous open state. A rotary operator including rotary members and a contact lever train selectively causes the stationary contact and the moveable contact to assume either a closed or an open state. A single solenoid for sensing breaker current in each phase causes the rotary operator to move the contacts from a closed state to an open state. Additionally, the solenoid for a faulted phase directly acts on a solenoid bell crank to cause the contact to begin to assume an open state in a trip operation, if breaker current reaches a preselected trip value in the faulted phase.

Abstract: The present invention relates to a kind of electromagnet for applications requiring traction, braking, vibration, electromagnetic valve and contactor operations. The electromagnet according to the present invention has new characteristics of temperature rise. A T-shaped solenoidal structure without a heat dissipating window is provided for the body of the electromagnet. Only under high magnetic flux-density close to saturation can the electromagnet sustain holding. Current limiting switching circuits are also provided. The starting current-density of the coil is very high. The starting ampere-turns is higher than the value adopted in conventional designs, and the holding ampere-turns are very low. A normal fuse tube can be reliably adopted for overheat protection.

Abstract: A dust preventing device for an electromagnetic contactor prevents foreign matters accumulated on a foreign matter preventing wall from slipping off the wall due to vibrations of electromagnetic contactor. In a case where an arc extinguishing chamber cover is disposed to cover a fixed contact and a movable contact, and includes a foreign matter preventing wall provided under a gas discharging opening formed on the cover, the foreign matter preventing wall is formed with ribs provided therearound in a shape of an embankment. Therefore, foreign matters having entered through the gas discharging opening can be positively trapped in a hollow portion surrounded by ribs, so that the foreign matters do not fall into the electromagnetic contactor from the foreign matter preventing wall due to vibrations of the contactor.

Abstract: A protective switch device such as a contactor/circuit-breaker comprises double-contact switch poles. Contact bridges are housed in a mobile support. Slide members guided in slots of the support and commanded by a tripping mechanism can be applied to the bridges. The mobile support can be actuated by a solenoid without the contact pressure springs transmitting any reaction force to the armature of the solenoid.

Abstract: The present invention aims to provide a current-limiting circuit breaker which is improved in assembling efficiency and which can readily cope with diversification of specifications. The circuit breaker of the invention comprises power source side contact unit including a group of component parts containing a power source side contact and movable contact unit including a group of component parts containing a load side contact. The units are detachably connected to each other. The movable unit is selectively connected to the various power source side contact units. Therefore, according to the invention, circuit breakers of various kinds of types can be obtained which are more useful, and manufactured by a small number of component parts some of which are commonly used in products. The circuit breakers can readily cope with the diversification of the specifications, and are improved in assembling efficiency.

Abstract: A switch device comprises at least one switch comprising in a casing at least one fixed contact cooperating with a mobile contact movable in a switching chamber by a tripping mechanism. The casing comprises a base fastened to walls which delimit a channel constituting the switching chamber which cooperates with a closure module carrying an electrical conductor which connects the fixed contact to a connecting terminal, the combination of the casing and the module constituting the switching chamber. This design facilitates industrial manufacture of the device and improves its insulating and operating qualities.

Abstract: An auxiliary switch for an electromagnetic switching device with two pressure springs (2, 3) arranged outside of the axis of movement (1) of the contact bridge support (10), these pressure springs being supported in the manner of a two-armed toggle joint respectively with one end in respectively one of blind holes or the like formed on mutually opposite sides of the contact bridge support (10) and with the other end in respectively one of recesses provided in the housing sections (A, B) and exhibiting a negative return spring characteristic against the tensile force of the drive.

Abstract: A logic level interlock device for an electrical contactor having an armature carrying separable contacts is provided. The interlock includes a plunger which is movable with the armature as the armature moves between its open and closed positions. A logic level sensing means is provided adjacent the plunger. An activation means which is sensed by the logic level sensing means is carried by the plunger member. In one embodiment of the invention, the sensing means is a set of magnetic reed switches which are activated by a permanent magnet carried on the plunger. In another embodiment of the invention, the sensing means is an opto-coupler circuit. The activation means carried on the plunger is perferably an opening which allows the infrared radiation to pass through to the receiver portion of the opto-coupler. In accordance with yet a further embodiment of the invention, the sensing means are two inductive sensing elements which are activated by a permanent magnet or a ferrite bead.

Abstract: The invention concerns an arrangement to couple an auxiliary switch mechanism to an electrical switchgear unit, preferrably a contactor, with a contact slide piece onto which the moving contact pieces are mounted, and a switchgear housing onto which the switchgear fixed-mounted contact pieces are mounted. The contact slide pieces of the switchgear unit and the auxiliary switch mechanism are mounted so that they can slide transversely to the direction of connection. A projection of the auxiliary switch mechanism is positioned in a cutout of the contactor in an interlocking fashion. The connection of contact slide pieces similarly takes place in a positive, interlocking fashion. A lock makes an effective connection with the position of the contact slide piece in the auxiliary switch mechanism, thereby preventing the removal of the auxiliary switch mechanism when the unit is switched on.

Abstract: An industrial rated molded case circuit breaker is fitted with a phase barrier and a phase insulation cap at the line end thereof to redirect the arc exhaust gases exiting from the line end and to prevent an electric circuit between the different phases of a multiphase electric power distribution system. The Y-shaped phase barrier eliminates the need to provide additional insulation to the line end conductors. The phase insulation cap provides inexpensive and reusable means for isolating mounting screws from the line end conductors.

Abstract: An interlock mechanically locks out of one of two electromagnetic switching devices which are located side by side while the other switching device is in its closed position. The interlock achieves this lockout by adapting the moving parts of the switching devices, which are to be coupled, to locking elements. The locking elements are preferably slide bars which extend from the interlock. The moving parts of the switching devices form coupling members for auxiliary switches. These auxiliary switches can be set onto the switching device. The slide bars conform to the coupling members. This makes it possible to mount an interlock, for two electromagnetic switching devices located side by side, in place of or in addition to auxiliary switch units.

Abstract: A circuit breaker having at least one phase or pole including a first movable arm having a first contact and a second movable arm having a second contact. The first arm is driven by a switching gear. The second arm is disposed opposite to the first movable arm such that the second contact contacts the first contact when a normal current flows. The first arm exerts an electromagnetic repulsive force in such a direction that the first and second arms repel each other to open the first second contacts when a current exceeds a predetermined value. The second arm is pivotally supported by a support angle fixed on a housing and is electrically connected via a flexible lead with a terminal also fixed on the housing. The support angle and the terminal are fitted to an insulator such that the support angles, the terminal and insulator are assembled in a unitary construction.

Abstract: An interlock, for a pair of electromagnetic switches, includes operating members which are pivoted by movement of armatures of the switches between off and on positions. Ring segment cams are carried by the respective operating members along arcuate paths which intersect such that movement of one switch out of the off position mechanically blocks movement of the armature of the other switch out of the off position. For side by side electromagnetic switches, the operating members are directly confronting. For other arrangements of the switches, such as one above the other, the operating member of one switch includes a first pivot member pivoted by the associated armature, and a second pivot member on which the ring segment cam is carried, confronting the second operating member, and connected to and pivoted with the first pivot member by a connecting member.

Abstract: A switch which is superior in current limiting performance. The switch comprises a movable contact element having a pair of movable contacts secured thereto, a pair of fixed contacts individually secured to fixed contact elements for individually contacting with the movable contacts, an electromagnetic driving device including a movable iron core, and a first operating rod secured to the movable iron core. An electromagnet is disposed alongside the electromagnetic driving device and includes a movable iron core, and movement of the movable iron core of the electromagnet is transmitted to the movable contact element by way of a transmitting member and a second operating rod. The first and second operating rods are disposed for movement along a common axial line, and movement of the movable iron core of the electromagnetic driving device is transmitted from the first operating rod to the movable contact element either directly or by way of the second operating rod.

Abstract: The current limiting circuit breaker comprises a circuit breaker (1A) and at least one current limiting unit (1B); the circuit breaker (1A) has load side terminals (12) and power-source-side or connection terminals (2a), and the current limiting unit (1B) is unitized to be simply connected to the circuit breaker (1A) or to another current limiting unit (1B) at their power source side terminals; the current limiting unit (1B) has current limiting connection terminals (25a) which ride on the circuit breaker connection terminals (2a) or power-source-side terminals (20a) of another current limiting unit (1B) for connection, to the circuit breaker (1A) or another current limiting unit (1B).

Abstract: A one-piece molded adaptor comprises a rectangular frame having inwardly directed ledges on opposed lateral legs cooperably engagable with projections on a contactor housing normally intended to interlock with an auxiliary contact block housing. The frame fits firmly over a rectangular protrusion of the contractor housing to securely lock the adaptor to the contactor. A depending cantilever portion provides a laterally offset portion overlying a reset plunger of an overload relay and provides a finger-engagable pushbutton portion offset from the plunger and centrally located relative to the starter panel footprint to mimic the reset button location of earlier generation starters.

Abstract: An electronic trip molded case circuit breaker includes components that are designed for high speed robotic assembly. A unitary trip-to-test button is down-loaded within the circuit breaker housing for automatic alignment with the circuit breaker operating mechanism during the circuit breaker assembly process. A unitary auxiliary switch interface unit is also down-loaded within the housing for automatic alignment with the operating mechanism during the assembly process.