Abstract: The rotating armature relay exhibits one or two ferromagnetic bars which are provided with an insulating covering in their central area. Contact springs are secured in the insulation covering, the contacting, free ends of said contact springs respectively interacting with cooperating contact elements anchored in a base body. As a result, a slide-free and, thus, low-friction actuation derives as, however, does relatively high friction at the contact locations, whereby contact impacts are suppressed and foreign layers are abraded from the contact surfaces.

Abstract: An electromagnetic relay has a tongue armature disposed inside a hollow coil body and having a free end movable between two cooperating pole plates, and a fixed end having an additional spring section disposed at an angle with respect to the movable portion of the armature, the spring section being secured to one of the coil flanges, thereby extending the effective free spring length of the armature so as to improve the sensitivity of the relay. The position of the armature with respect to the pole plates is adjustable after encapsulation of the relay by irradiating the spring section of the armature with thermal pulses, such as laser pulses at specified locations.

Abstract: There is provided an add-on terminal connector assembly for electric control devices used in motor control centers that eliminates the conductor bends necessary to route incoming conductors to the terminals of a control device which is mounted in the control center.

Abstract: An electromagnetic relay includes a coil wound around a core both of whose ends project therefrom. A yoke extends parallel thereto, and each of its ends is formed with two pole pieces which extend towards and lie one on each side of an end of the core with a certain gap being defined therebetween. A connecting member extends parallel to the core and the yoke and is mounted so as to be movable transversely, and means are provided for establishing and breaking some electrical connection according to such transverse movement. There are provided two armature pieces, one for each end of the core and both fixed to the connecting member. Each armature piece includes a permanent magnet plate and two plates of magnetic material fixed to it so as generally to form a C shape with one of the magnetic material plates being magnetized to be a north pole and the other a south pole.

Abstract: A circuit breaker including a mechanism comprising an on-off mechanism unit for opening or closing the electric circuit and a trip mechanism unit for cutting off the closed circuit, the on-off and trip mechanism units being coupled independently of each other and relating to each other only when the circuit breaker is tripped, but not when open or closed, thereby aiming at diminution in the time from detection of abnormality to disconnection of contacts, an increase in a distance between the disconnected contacts, and stabilization of trip characteristic, thus improving the cutoff performance.

Abstract: There is disclosed a mercury switch for use in thermostat applications. The switch has a hollow housing fabricated from glass and is positioned in the horizontal plane when in an operating orientation. The switch has a first common electrode within said housing and extending parallel to the horizontal plane with a terminal end extending from the housing. Positioned above the first electrode is a second shorter electrode with a third longer electrode positioned above said second electrode said third electrode being longer than said second but shorter than said first. Positioned above the third electrode is a longer fourth electrode. Essentially, major portions of the electrodes within the housing are parallel to each other. A charge of mercury is in the housing and operates to make contact between the electrodes in four operating modes indicative of thermostat operation for control of a heat pump, furnace and air conditioner.

Abstract: The invention provides a magneto-thermal device for overcurrent relays.The end of a core, whose axial position may be adjusted with respect to a mobile plate, placed opposite and pivoting about one end of the yoke, is secured against movement by a wedge which is guided in a groove belonging to a flange of the coil shell.This device may be used in any thermal relay where a stable and precise adjustment of the tripping current threshold is desired.

Abstract: A timing attachment for a relay that is programmable to provide an ON Delay or an OFF Delay operation of a pair of switches having either normally open or normally closed contacts. The attachment includes a housing that is mountable in either of two positions on an assembly that is attached to the relay to program the OFF and ON Delay timing functions and indicia on the switches that indicate the contact operation of the switches when the switches are inserted in sockets in the attachment. A cover for the attachments has openings there through that expose indicia on the switches indicating the normally open and normally closed operating condition of the switches when the switches are inserted into the sockets and a slider that is movable along a rear surface of the cover to positions indicating the programmed operation of the attachment and the mode of operation of the switches when the attachment is mounted on the relay.

Abstract: A design of magnetic field actuated sealed electrical contact unit for an electrically operated relay or mechanically operated switch is constructed of metal and plastics laminae (1, 1a, 2, 2a, 5 and 5a) one of which incorporates a diaphragm 10 which functions both as moving contact and armature. In the case of a relay the electromagnetic energizing unit (3, 3a, 4 and 4a) may also be of laminar construction.

Abstract: A relay adapted to be mounted on a printed circuit board, and a method for mounting such relays. The relay includes the usual terminals (23, 24, 26 27, 28, 29) extending therefrom and adapted to be mounted on a printed circuit board (30) and electrically coupled to conducting paths on the board. In addition, however, the relay is provided with additional load terminals (56, 59, 62, 82, 92) which function as external connection junctions to connect the relay directly to the load being controlled via a circuit that completely bypasses the printed circuit board. According to a preferred embodiment, the relay includes stationary contact members formed to have not only board-mounted terminal portions extending therefrom but also external terminal portions for direct attachment to the load.

Abstract: A relay structure advantageous for compacting purpose is disclosed herein. The relay comprises a generally L-shaped yoke having an upright yoke leg and an upper yoke member extending substantially at a right angle thereto, the upright yoke leg being connected to one end of the core of an energizing coil which extends substantially in parallelism with said upper yoke member. The upper yoke member is formed with a center slot extending longitudinally thereof to be open at both longitudinal ends. A generally L-shaped armature is hingedly supported onto the free end of the upper yoke member with a tab extending across the air gap defined between the free end of the upper yoke member and the opposite end of the core. Extended from the upper end of the tab is an actuator arm which is received in said slot and on which overlies a spring blade carrying at its free end a movable contact.

Abstract: A low voltage circuit breaker in a moulded case comprises a breaker unit (10) and a remote control unit coupled to it that controls the swing of a bistable movable contact (22) housed in the breaker unit. A trip mechanism (50) cooperates with movable contact (22) in the case of a fault to swing movable contact (22) into open circuit position independently of the remote control mechanism (48). A resetting handle (88) must be actuated in order to render the circuit breaker reoperative.

Abstract: A remote control system circuit breaker which latches a trip link and a latch link by the spring force of return springs so that on- or off-hold of a movable contactor supported from the latch link depends upon a holding force of an operating electromagnet pivotally connected to a handle, thereby achieving miniaturization of the electromagnet, in turn the circuit breaker, and a saving of power consumption of the electromagnet.

Abstract: A molded case circuit breaker includes a highly integrated operating mechanism having an over-center toggle mechanism for opening and closing a pair of electrical contacts and a trip mechanism for responding to overload and short circuit or fault current conditions to separate the pair of electrical contacts. A generally flat, intermediate latch plate includes an upper latch surface for latching with a movable cradle of the over-center toggle mechanism and a lower latch surface for latching with a trip bar of the trip mechanism and a pair of outwardly projecting pivot arms disposed between the upper and lower latch surfaces. The over-center toggle mechanism includes a pair of upper toggle links and a pair of lower toggle links interconnected by a toggle spring pin.

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

Abstract: The improved relay includes two hollow coil bodies which are in axial alignment on a common base. A beam rotating armature extends through the inside of the coil bodies in the axial direction. A bearing element composed of an insulating material is provided in the central portion of the armature, the bearing element including center contact springs which are embedded parallel to the armature. By means of the bearing element, the armature is embedded by means of neck portions in the base and in a sole plate which connects the two coil bodies. The two ends of the armature form working air gaps with a pair of yokes, the yokes being angularly positioned and being actuated by two permanent magnets which lie above the coil bodies.

Abstract: The parts of the three-pole contactor (FIGS. 1 and 2) are designed so as to enable economical assembly thereof without any screws or similar fasteners. A molded contact carrier (12) having windows (12a-c) that retain movable bridging contacts (14, 16, 18) and their bias springs (20, 22, 24) and armature (28) seat (12i) and snap-in securing ramps (12k, 12m) that retain a leaf spring (26) extending through a slot (28a) in the armature (28) forms a subassembly that is inserted into an upper housing part (2) that has slots (2v, 2w, 2x) into which stationary contacts (6, 8, 10) are inserted. An encapsulated coil subassembly (38) having terminals (42, 44), a bobbin (40) and a coil (4) and a return spring (36) snap-in assembled thereon is placed over the armature (28). An E-shaped magnet (46) having shading coils (48, 50) on its poles is inserted through the holes in the coil assembly (38).

Abstract: A ganged, multiple pole circuit breaker in which the multiple poles of each circuit breaker are mechanically related to a single operating point on the associated breaker. Their single operating points are pivotally related to a first common pivot point, which is fixed in relation to a common frame which supports both circuit breakers. Their single operating pivot points are additionally pivotally related to a second common pivot point. A guide arrangement, fixed to the common frame, guides the second common pivot point in a predetermined rectilinear path when actuated by an operating mechanism which includes a shaft arranged to extend through a transformer tank wall to a master operating handle. The guide arrangement prevents any motion of the second common pivot point in a direction lateral to the rectilinear path.

Abstract: A pair of toggle links in a high amperage molded case circuit breaker are driven over center in response to the discharge of a closing spring for pivoting a plurality of blades and closing the breaker contacts. A latch link pivotally connected to the upper toggle link also is engaged by a pivotable latch along an arcuate surface on the latch so that shock forces are transmitted along a radial line of the latch for minimizing inadvertent rotational forces on the latch. The latch release force is rendered dependent on the spring force exerted through the links from the blade overtravel springs and the coefficient of friction of the latch arcuate surface. The force exerted through the links is controlled by an adjustable stop having an inclined surface engaging the pivot connection between the toggle links. Large movements of the stop provide small changes in the inclined surface position relative the pivot connection to provide small changes in the overcenter position.

Abstract: A bistable electromagnetic latch, particularly adapted for use with an electronic combination lock on a luggage case, comprises a magnetic member pivotally mounted for rotation between a pair of pole pieces, the magnetic member having first and second stable rotational positions at which each magnetic pole is adjacent to a different pole piece, and a pair of oppositely wound coils associated with the pole pieces and responsive to the momentary flow of electrical current therethrough for producing a magnetic flux that causes the magnetic member to rotate from one position to the other.