Abstract: A circuit interrupter with an accessory case socket into which an accessory bell alarm member is disposed. A two-piece lever arrangement is provided in the bell alarm accessory case between the micro-switch button thereof and the operating mechanism of the circuit breaker. In the first stage of operation the operating mechanism rotates the entire two-piece member as a unit until the bell alarm button has been completely depressed, after which overtravel of the operating mechanism is accommodated by rotational movement of only one of the members on a common axis against the force of a hub located torsion spring.

Abstract: A circuit interrupter including separable main contacts, an operating mechanism interconnected with the contacts, and a housing in which the contacts and the operating mechanism are disposed. The housing includes a cover positioned atop a base. The cover includes a recessed region in which are formed a first hole and a second hole. The first hole and the second hole extend through the cover and into the base, and the second hole extends through the base. A retainment device is positioned within the recessed region, and includes a first opening positioned above the first hole and a second opening positioned above the second hole. The second opening has an opening diameter. A first screw is inserted into the first opening and the first hole. A second screw is for inserting into the second opening and the second hole. The second screw includes a threaded portion having a first diameter and a non-threaded portion having a second diameter.

Abstract: A relay and control module combination wherein the control module has an essentially cuboid housing with a coupling side for plug connection to an auxiliary connection side of a cuboid relay housing. Mutually complementary plug connector elements, which can be connected mechanically and electrically, are provided in both the coupling side and in the auxiliary connection side, The plug connector elements allow mechanical and electrical coupling between the control module and the relay. In this way, a universal relay can be converted into a special relay having a specific function by plugging on the control module.

Abstract: A trip device comprises a removable module for determining long delay tripping parameters, designed to be fixed to a front panel of the trip device. In the fixed position, the removable module exerts a pressure, via an auxiliary part, on a movable part so as to move the latter to a position in which it performs voltage connection of the processing circuit of the trip device to the conductors of a power system to be protected. In an unlocked position of the removable module, the movable part is urged to the disconnected position by a spring. The part can be movable in rotation or in translation.

Abstract: A circuit breaker (10) including a terminal barrier system (140). The terminal barrier system (140) includes a terminal barrier (142) attached to a circuit breaker base (12) at the terminals (16, 18), line and load, of the breaker (10) and a terminal connector (144) mounted in the terminal barrier (142) to align with a terminal (16, 18) of the breaker (10). Several embodiments of the terminal barrier (142) and terminal connector (144) are provided which allow flexibility in combining the various terminal barriers and terminal connectors for a given current rating of the breaker (10). The terminal barrier system (140) protects the terminals (16, 18) of the circuit breaker during short circuit condition operations, prevents pole to pole electrification and prevents accidental contact with live electrical wires in the contacts (42, 44).

Abstract: A circuit interrupter including separable main contacts, an operating mechanism interconnected with the contacts, and a housing in which the contacts and the operating mechanism are disposed. The housing includes a base and a cover. Also provided is an attaching device that secures the cover to the base. The attaching device includes a main member having a head connected to a body, with the body separated into a non-gripping portion adjacent the head and a gripping portion away from the head. The gripping portion attaches to the base, and the non-gripping portion extends through the cover with the head providing a stop for limiting the separation between the base and the cover. The attaching device further includes a compressible member that is positioned between the head and the cover.

Abstract: A relay of the present invention comprises a coil plate 30 having at least one layer of spiral flat coil 36a-36d formed around each of a pair of holes 32, 33 and fixed contacts 23a, 24a and movable contacts which are opposed to each other contactably and separably via the holes 32, 33 in the coil plate 30. The fixed contacts 23a, 24a are provided on one side of each of a pair of flat core blocks 21, 22 juxtaposed and insulated from one another. The movable contacts are provided on one movable contactor 43 which is supported so as to be drivable along a direction of plate thickness via at least one hinge portion 42 extending from a support member 44 for a movable contact plate 40.

Abstract: An insulated container of a circuit breaker is divided into three vertically-arranged portions including a case, a middle case, and a cover. A fixed contact shoe and a movable contact shoe are accommodated in the case. An opening and closing mechanism and an overcurrent trip device are accommodated in the middle case. A holder slidably passing through a hole in a bottom wall of the middle case by an operation of the opening and closing mechanism is moved linearly and perpendicularly to the bottom wall to open and close the movable contact shoe. A gap in the hole between the holder and the bottom wall is very small due to the straight movement of the holder, so that an arc gas generated in the case is completely shut down by the bottom wall and does not reach the opening and closing mechanism in the middle case during current interruption.

Abstract: This concerns a molded case circuit breaker having separable main contacts and an operating mechanism utilized to cause the separable main contacts to open and close. A trip unit is provided to actuate the operating mechanism in desirable circumstances. The trip unit is removable. In this case the trip unit is insertable into a trip unit region in the case of the circuit breaker from the top or end thereof. The trip unit is then joined to an internal electrical conductor by way of a bolt and an internally fixed nut. The bolt can be driven into the nut through the trip unit conductor and the internal conductor from a position external to the circuit breaker case. The trip unit can be inserted into the trip unit conductor from a point above the circuit breaker case or vise versa. The trip unit has a securement nut built into its case.

Abstract: An electro-mechanical reversing contactor is disclosed in which a single common base is molded to receive two contactor powerheads. The common base has a bottom surface and upwardly extending sides, with an upwardly extending center divider, thereby forming two powerhead sockets. Each powerhead socket is capable of receiving a powerhead therein. The common base also has a circuit board pocket to receive a single circuit board to control both contactor powerheads. The center divider has an upwardly extending interlock tower to receive an interlock pawl that is engageable with each of the contactor powerheads. The interlock mechanism mechanically prevents both contactors from being energized at the same time. The common base for two powerheads saves labor and material costs in assembling and installing a reversing contactor.

Abstract: This concerns a molded case circuit breaker having separable main contacts and an operating mechanism structured to cause the separable main contacts to open and close. A trip unit is provided to actuate the operating mechanism in desirable circumstances. The circuit breaker housing has an auxiliary device compartment therein into which may be inserted a key lock arrangement. The trip unit has a plunger member which protrudes into the auxiliary device compartment and which, when actuated, causes the trip unit to actuate the operating mechanism to open the main contacts. When the key lock is actuated, a slideable member interacts with the plunger member in the trip unit and maintains the trip unit in a configuration that prevents the main contacts from engaging. Thus, as long as the lock member is maintained in the locked state, the circuit breaker may not be reset.

Abstract: This concerns a molded case circuit breaker having separable main contacts and an operating mechanism utilized to cause the separable main contacts to open and close. A trip unit is provided to actuate the operating mechanism in desirable circumstances. Disposed within the circuit breaker casing is a region for the installation of an auxiliary device, such as a bell alarm device, shunt trip device etc. The case of the auxiliary device has an opening disposed therein through which a movable auxiliary device lever protrude. The opening of the circuit breaker case has a region for interfacing with the operating mechanism of the circuit breaker. A separate lever is disposed between the operating mechanism and the auxiliary device lever member. This separate lever member is driven by the operating mechanism of the circuit breaker and actuates the lever of the auxiliary device. It is pivoted about a protrusion on the auxiliary device.

Abstract: This concerns a molded case circuit breaker having separable main contacts and an operating mechanism utilized to cause the separable main contacts to open and close. A trip unit is provided to actuate the operating mechanism in desirable circumstances. The trip unit has a plunger and latch contained therein which is primarily responsible for latching the circuit breaker contacts open by way of the operating mechanism once a trip has occurred.

Abstract: There is provided an electro-magnetic relay including (a) a coil assembly including a core, a coil wound around the core, and a magnet located at the center of the coil assembly, (b) an armature block assembly including an armature swingable relative to the core, a spring swingable together with the armature and having a contact at a distal end thereof, and an insulating block formed integral with the armature and the spring, (c) a base assembly including a fixed contact facing to the spring, a fixed contact terminal on which the fixed contact is formed, a neutral terminal to be electrically connected to the spring, a coil terminal to be electrically connected to the coil, and an insulating block formed integral with the fixed contact, the fixed contact terminal, the neutral terminal, and the coil terminal, and (d) a cover housing therein the coil assembly, the armature block assembly, and the base assembly, the cover including (d-1) an enclosure having both a bottom edge defining an open bottom, and an insul

Abstract: The present invention discloses a controller unit wherein coils of the electromagnets of a hydraulic brake system are arranged in a frame. The controller unit also has a printed circuit board having smaller dimensions than the frame. The printed circuit board includes through-contact holes which accept the ends of the lead wires for the coils, the ends being configured as press-in pins. The plug contacts of the printed circuit board are arranged so as to achieve an optimum component layout on the printed circuit board, and the lead wires are guided in the controller according to this condition.

Abstract: A magnetic flux concentrator shield is disclosed for use with magnetic flux sensors in an overload relay for multiple pole electromagnetic contactor applications. The magnetic flux concentrating shield has slotted layers of laminated members. The layers have a series of pole shielding slots which concentrate magnetic flux generated by conductors carrying current through conductor apertures in each layer. Magnetic flux sensors are positioned within air gaps within each pole of the shield. By shielding the generated magnetic flux from reaching the magnetic flux sensor of another pole, the pole shielding slots minimize cross pole magnetic flux sensor interference.

Abstract: A circuit breaker having a trip unit includes a lock out assembly positioned adjacent the trip unit for controlling access thereto. The lock out assembly includes a base member, a cover member and a slide member received therebetween. The slide member is moveable between various positions for controlling access to settings for the various operating parameters of the circuit breaker as provided by the trip unit.

Abstract: An electromagnetic contactor is formed of upper and lower cases. Recesses are formed on opposite sides of the upper case, while guide walls that fit the recesses are provided on two opposite sides of the lower case to extend toward the upper case. The recesses and the guide walls can be fitted together even when the upper case is rotated by 180.degree. relative to the lower case. Therefore, the upper and lower cases can be attached to each other even if the upper case is rotated by 180.degree. relative to the lower case.

Abstract: A breaker, wherein the circuits for the power lines and the neutral line extend through one current transformer. The breaker has a reduced width as compared to known two pole breakers so that additional breakers can be included on one panel. More specifically, the component configuration of the breaker provides a simplified arrangement of the power line circuits so that such circuits readily extend through one current transformer. In addition, the architecture provides that the width of the breaker can be reduced to about 0.5 inches per pole, which enables securing additional breakers to one panel.

Abstract: The relay has, one after the other on an elongate, narrow base body, a magnetic system and a contact arrangement having at least one fixed contact carrier and at least one movable contact spring. The contact carriers are in this case each embedded by a middle section into the plastic of a base body in such a way that their connecting lugs lie in a plane parallel to the longitudinal axis of the relay, while their contact-making end sections, which emerge on the upper side of the base body, lie in planes which are parallel to one another and perpendicular to the plane of the connecting lugs. This enables dimensionally accurate embedding of the contact carriers with good insulation with respect to the magnetic system and with easy processing from a sheet-metal plate.

Abstract: An object of this invention is to provide an electromagnetic relay with better isolation characteristics. The invention discloses an isolation wall and an isolation rib in an electromagnetic relay for separating a movable iron member from a movable contact member to provide better isolation characteristics.

Abstract: A molded case circuit breaker having separable main contacts and an operating mechanism utilized to cause the separable main contacts to open and close. A trip unit is provided to actuate the operating mechanism in desirable circumstances. The circuit breaker has external terminals which are connectable with an external load and an external power supply. A collar is used to interconnect the circuit breaker terminals with the load and power supply. The terminal collar in this case is non-symmetrical. The non-symmetrical collar provides two functions: the first function is that the path of electrical continently between adjacent collars is enlarged for higher voltage applications because of the non-symmetrical nature of each collar; secondly, the circuit breaker case has a seat therein which has the same cross-section as the non-symmetrical collar, so that the collar can only be inserted therein in one cross-sectional orientation.

Abstract: An electromagnetic starter with an overload relay having magnetic flux shielding is disclosed for use in industrial contactor applications. The starter includes a multi-pole DC controlled contactor which is interlockingly coupled to an overload relay. The overload relay has a simplified interlocking connection to the contactor, which when made, corresponds to an abutting electrical connection between the contactor and the overload relay also being made. The contactor further has a guiding pin that promotes even contact closure within the contactor.

Abstract: A molded case circuit breaker is taught with a housing base and a primary cover disposed on the housing base. The primary cover has a recess therein for an auxiliary module which is disposed in the recess. A secondary cover is disposed on the primary cover for covering the recess when the auxiliary module is disposed therein. A combination manual trip and secondary cover interlock is provided which is accessible from outside of the secondary cover for manually opening separable main contacts or for automatically opening separable main contacts when the secondary cover is removed. There is also provided on the back plane of the housing a single piece DIN rail attachment for securing the back plane to a DIN rail. There is provided an under voltage release mechanism for actuating the circuit breaker to trip on the occurrence of an under voltage condition of pre-determined magnitude across the lines served by the circuit interrupter.

Abstract: A two pole circuit breaker having arc fault and ground fault protection circuits, in addition to a standard thermal-magnetic trip units, that is designed to fit in a standard knock-out, three-quarter inch or one-inch, of a circuit breaker load center panel. The circuit breaker is divided into three compartments with two side-by-side compartments housing the electro-magnetic trip mechanism respectively for each pole, and a third compartment in tandem with the other two for housing the electronics associated with the ground fault and arc fault protection circuits. The circuit breaker spans the area allocated to a single knock-out with portions of the electro-magnetic trip compartments seated within the knock-out opening and with the third compartment hidden behind the panel.

Abstract: Low-voltage circuit breaker exhibiting live levers operatively connected to a control device for opening and closing the circuit breaker, fixed live terminals and electric arc extinction chambers, there being provision for the levers, the terminals and an extinction chamber to be enclosed in half-shells constituting a pole, for the half-shells to be made from insulating material and for several poles to be clamped in a supporting frame.

Abstract: A rotary contact circuit breaker having a venting arrangement to vent gasses operated by a short circuit interruption to a location substantially above the load strap of the breaker whereby electrical components are not damaged by the gasses and ionized gasses from different phases are conveyed in discrete channels for a period exceeding the period during which ionization is present.

Abstract: The arrangement for mechanically coupling an overload relay (1) to a contactor (2, 15) is suitable for use with a contactor (2) having connection terminals (11) with wire cages (17) as well as with a contactor (15) having connection terminals (16) with pressure plate claws (12). In order to allow mechanical coupling for both types of connection terminals (11, 16), the coupling cutout in the base of the contactor (2, 15) contains a central cutout (7) and two slots (8, 9) on both sides of the central cutout (7), which are aligned in the pick-up direction of the connection terminals (11, 16). The central cutout (7) is provided to accept the entire end section of the hook (3), and both the slots (8, 9) accept only the flat end section (4) that lies behind the latch element (5) of the hook (3).

Abstract: In connection with a relay with contact units on both sides of a partition and with plug connectors which can be plugged vertically in relation to the partition, a very compact construction is achieved by offsetting the contact units arranged on the top side of the partition with respect to the contact units arranged on the bottom side, and by passing the plug connectors through the partition and between the electrically conductive elements arranged on the bottom side. Thanks to offsetting the plug connectors with the connecting element on the centerline (M), a very large distance can be achieved between the plug connectors, which meets all minimal requirements for a safe separation of different potentials. Labyrinthine courses for air and leakage paths between the circuit units and with respect to the actuating member can be created it the interior in the relay by the partition, separating walls, covers and collars, which also meet these requirements.

Abstract: An electromagnetic relay having a manual actuator wherein at an edge of the relay's housing is an opening formed in the shape of a mounting slot in which a pivot lever is mounted with a hinge segment. In an idle state, an outer lever segment of the pivot lever is lowered in a cavity of a housing wall while an inner lever arm extends along a housing wall perpendicular thereto. When the pivot lever is actuated, the inner lever arm actuates a movable relay part, in particular a bolt, up to a first operating position. When the pivot lever is rotated further, the inner lever arm can be locked with the movable relay part.

Abstract: A circuit interrupter including an operating mechanism and separable main contacts interconnected with load and line terminals has an interface region between the top and bottom portions of the completed housing thereof, which may be of reduced cross section relative to the remainder of the side walls of the circuit interrupter for being moved or pushed outwardly under the pressure of expanding gas during a circuit interruption operation. To more easily clear or separate abutment surfaces by near lateral movement thereof to provide a small opening for pressurized gas to escape the elasticity of the side wall is utilized for this purpose. Provided that the elasticity limit is not exceeded, the wall will return to its original position sealing the internal portions of the circuit interrupter from the exterior once the gas pressure has dropped below a predetermined level.

Abstract: An electrical shorting block has a molded body with a plurality of side-by-side recesses in which terminal members having first, tapped apertures are secured. A shorting bar supported in the molded body extends across but is spaced from the terminal numbers and has second apertures aligned with the first apertures. For the hot side terminal members, shorting connectors slidable through but captured by the apertures in the shorting bar have threaded ends which can be selectively threaded into the tapped first apertures of those terminal members. Helical compression springs bias the captured shorting connectors away from the terminal members when not used to short the terminal. Common terminal members are connected to the shorting bar by shorting screws which remain threaded into the first apertures. The terminal members preferably have both screw terminations and male fast-on terminations.

Abstract: A switchable adaptor for receptacles includes a manually settable switch that may be manually tripped or tripped by a solenoid in response to a signal. The switch is readily converted to be normally ON or normally OFF, and to be unipolar or multipolar. The adaptor may conveniently be in the form of a power bar or a power block, and will normally include a circuit board which may incorporate a circuit suitable for generating a signal responsive to a predetermined input condition.

Abstract: An auxiliary switch for a circuit-breaker includes a casing containing at least one contact blade member mobile under the control of a pivoting and sliding actuator lever between a closed position and an open position. The actuator lever has a lateral actuator pin which projects out of the casing through a slot in the latter. The slot has a localized escape lobe away from its main part and which receives the actuator pin.

Abstract: A motor vehicle starter includes an electromagnetic contactor, which is equipped with an external electrical terminal adaptor. The terminal adaptor has a body of insulating material. At least one conductive connecting strip is contained within the insulating body, with one end of the strip projecting out of the adaptor body for connection to one of the contactor terminals. The other end of the connecting strip is connected electrically to a supplementary terminal which projects out of the adaptor body so as to be in a position or orientation which is different from that of the contactor terminal to which it is connected.

Abstract: A molded case circuit breaker or switch having the LOAD and/or LINE terminals thereof protected by a multifunctional terminal shield arrangement which also provides interphase barriers for the aforementioned terminals and associated wiring. The barrier also provides wire channels for lower voltage supplemental wiring.

Abstract: A contactor includes an upper housing (1) for contact parts and a lower bobbin (5) that bears a coil and can be placed therein in an initial position or in a position displaced by 180 degrees. The coil terminals (6, 7) lie next to each other on one side of the bobbin (5). Before the assembly of the bobbin (5) in the housing (1, 4), at least two male parts (2, 3) comprising terminal pins, and at least one female part (8, 9) comprising a hole that is intended to receive one of the male parts (2 or 3), are molded on at the areas that will subsequently border each other. In order to arrange the coil terminals (6, 7) on one side of the contactor, the male part (2 or 3) that does not act in conjunction with a female part (8, 9) in this position must be broken off prior to assembly. In order to arrange the coil terminals (6, 7) on the other side of the contactor that is turned away by 180 degrees, the other male part (2 or 3) must be broken off.

Abstract: A power switch for use with a personal locator beacon (PLB), or an emergency position indicating radio beacon (EPIRB), that prevents accidental activation of the beacon to prevent false alarm transmission of emergency signals. The personal locator beacon includes electronic circuitry housed in a portable hand-held housing that includes a fail safe power switch which has a lever arm that is selectively movable between first and second offset recessed cavities formed in the housing. The lever arm is rotatable about a shaft between an "off" position wherein the lever arm is received within the first cavity, and an "on" position wherein said lever arm is received within the second cavity. An edge portion formed by the offset cavities stops the lever arm from rotating from the first position to the second position unless the lever arm is manually moved laterally along the shaft to clear the edge portion.

Abstract: A molded case circuit breaker is taught with a housing base and a primary cover disposed on the housing base. The primary cover has a recess therein for an auxiliary module which is disposed in the recess. A secondary cover is disposed on the primary cover for covering the recess when the auxiliary module is disposed therein. In order to secure the auxiliary module underneath the secondary cover in the recess of the primary cover, the module has deposed thereon a locking protrusion which is complimentary with a locking opening in the primary cover. The locking protrusion is flexible and has a longitudinal central bulge so that as the protrusion is pressed inwardly into the opening, the bulge causes the flexible protrusion to reduce diameter due to the presents of longitudinal slots therein until the bulge has passed the opening in which case it springs outwardly toward its normal position thus securing the protrusion in the base.

Abstract: A separable circuit breaker includes a separate trip apparatus portion, having a trip apparatus and a trip apparatus container, and a switching apparatus portion having a switching apparatus and a switching apparatus container. The switching apparatus and trip apparatus are connectable by connection terminals in a lower part of the respective containers. The trip apparatus portion also includes a trip apparatus cover connected to an upper portion of the trip portion container and an assistant cover rotatably connected to an upper portion of the trip apparatus cover. The assistant cover allows access to the trip apparatus. The trip appartus includes a bimetal element and an armature. The switching apparatus portion includes a crossbar and a handle. The crossbar is connected and engaged with the armature according to deformation of the bimetal element such that current flow through the circuit breaker can be opened by rotation of the crossbar when an overcurrent exists.

Abstract: A relay is provided with fixed contact mounts anchored in a base, as well as contact springs arranged between the fixed contact mounts. The springs are actuated at their free ends. The contact springs each have spring mounts that include terminal segments anchored in the base, respectively parallel to the fixed contact mounts, but outside the space enclosed by them. These terminal segments are connected with the appertaining contact springs via U-shaped connection segments; the connection segments are guided in corresponding guide channels of the base in an insulated fashion. In this way, several sets of switchover contacts can be arranged in simple and space-saving fashion in a relay base, given a predetermined terminal configuration.

Abstract: Upper and lower compartments are provided in metal-clad switchgear that are mirror images of each other. The compartments have doors that move toward one another to lock. The upper compartment has rails at the bottom for receiving a fuse truck, and the lower compartment has a division sheet between the compartment that has openings in it for receiving mating projections on the doors.

Abstract: The relay has at least one switching system with a base body (1) forming a baseplate (11), in which base body a contact spring connection element (4) and mating contact elements (5, 6) are anchored and on which base body a coil (21, 22) with a core (23) and a yoke (24) is arranged upright with the coil axis perpendicular to the baseplate, an armature being arranged between the coil and the baseplate. A contact spring (3) connected to the armature (26) is constructed in a U-shaped manner, and the resultant two spring limbs form a connection limb (31) and a contact limb (32) having high current conductivity. The relay can be produced in a simple manner with simple parts either as a single relay or as a double or multiple relay.

Abstract: A circuit breaker with a completely electromagnetic type overcurrent tripping device has a flexibility for changes in the production schedule of the overcurrent tripping device. An overcurrent tripping device for each pole is integrally housed in a common unit case, which is then inserted into a case of the circuit breaker. In this case, a yoke of the overcurrent tripping device is combined with an oil dash pot inserted into a coil, and the combined parts are pressed and fixed in the unit case without soldering. Thus, the coil, which is changed depending on the rated current, and the yoke and oil dash pot which are common products, can be separately stored prior to assembly, thereby enabling flexible responses to changes in the production schedule. In addition, the yoke and the oil dash pot need not be soldered and are fixed individually to the unit case, thereby reducing the number of assembly operations.

Abstract: An electromagnetic relay structure which includes a bobbin 1 having a coil 5 wound therearound. A coil terminal 6 is electrically connected with an end 5a of the coil 5. A base 4 is insert-formed with a terminal 8, 9. The coil terminal 6 has a first end firmly attached to a flange 1c of the bobbin 1 and a second end connected to the terminal 8, 9. A projecting piece 6a is formed in a generally central portion of the coil terminal 6. The projecting piece 6a is bent with an end 5a of the coil 5 twined therearound, to thereby support the end 5a of the coil 5. Another flange 1a of the bobbin 1 is fixed to the base 4 by fitting a projecting rod 1b of the flange 1a to a fitting groove 4a of the base 4.

Abstract: A resistance arrangement for an electromagnetic switching device (1) is useable for switching capacitive loads with main contact pieces (3) and auxiliary contact pieces (4). One terminal (7) of the auxiliary contact pieces (4) and one terminal (6) of the main contact pieces (3) of the same phase lie on the same side of the switching device (1) stacked on top of each other. The auxiliary contact pieces (4) switch on before the main contact pieces (3) and switch off after them. Between the terminals (6) and (7) of each phase, an ohmic resistance (8) located in a nonconductor housing (13) is connected. The resistance (8) is placed immediately under the terminal (7) of the auxiliary contact piece (4) in the existing cavity (14) of a nonconductor housing (13) expanding into the direction of the terminal (6) of the main contact piece (3). This arrangement can be easily installed and is space-saving.

Abstract: An electromagnetic switching device including, in an envelope formed by a base (1) and an insulating casing (7), a contact holder (3) in which are housed contact bridges (4) featuring a moving lock (8) capable of immobilizing the contact holder (3), wherein the lock (8) and the insulating casing (7) have sliding assembly devices (74, 75) which move the lock (8) positively from the rest position towards the contact holder (3) in the locked position by moving the insulating casing (7) away from the base, and the sliding assembly devices (74, 74) move the lock (8) away from the contact holder positively from the locked position by moving the casing towards the base.

Abstract: A reverse deflection prevention arrangement is provided for use in a circuit breaker for preventing a bimetal from bending in a direction opposite its normal thermal deflection. The reverse deflection prevention arrangement includes a tab portion extending from a yoke and a corresponding block member disposed on the inside surface of a circuit breaker cover. The tab portion engages the block member when the bimetal is forced to deflect in the direction opposite its normal deflection. An alternate embodiment of the reverse deflection prevention arrangement includes a reinforcement member secured to one end of the bimetal. The reinforcement member strengthens and supports the bimetal so that it is prevented from bending in the direction opposite its normal thermal deflection.

Abstract: In the case of the relay, an insulating wall which has at least three insulating layers is formed between the magnet system and a live metal part, in that the insulating wall is formed from a wall base having at least one insulating gap, and in that the insulating layer is formed in the insulating gap by insulating material which is inserted in liquid form and is subsequently cured.

Abstract: A breaker device excellent in safety and contained in a compact casing. In a casing 1, a pair of fixed electrodes 11a, 11b is projected, and a movable electrode 31, which is fitted with and detached from the fixed electrodes, is arranged. A handle 40 is inclinably supported by a supporting shaft 45. On the top surface of an upper casing 3, a pair of poles 70 is erected, and rectangular solid sliding projections 71 are projected, while guiding grooves 73 are formed in side faces of the handle 40. In each of the guiding grooves 73, an arc-shaped portion allowing the sliding projection 71 to rotate about the supporting shaft 45 is provided at an upper end of a linear portion which allows the sliding projection 71 only to slide therealong. When the movable electrode 31 is inserted with the handle being erected, the sliding projections are guided by the linear portions, while the handle 40, maintained in an erected state, is inserted.