Abstract: Electrical switching device, including separable electrical contacts, a switching mechanism and a control lever. This switching mechanism is designed to move the separable contacts reversibly and selectively between a stable closed state and a stable open state. The control lever can be moved between a closing position and an opening position. The switching mechanism is configured to move the separable contacts from their closed state to their open state when the lever is moved from its closing position to its opening position, and to this end includes a spring which, between the closing position of the lever and a first intermediate position referred to as the “dead point”, exerts a force that opposes the movement of the lever and which, between the dead-point position and the opening position of the lever, exerts a force that drives the contacts towards the open position.

Abstract: The invention relates to an electric switch, in particular a rocker switch, comprising a contact system and comprising a movable actuating element for switching over the contact system between two switch positions, in particular an on position and an off position. The switch has a drivable actuator, which is operatively connected to the actuating element in such a way that the actuating element in at least one of the two switch positions is moved, on driving of the actuator, into the other switch position by the actuator for switching the contact system. In particular, the actuating element is moved by the actuator from the on position to the off position of the contact system.

Abstract: The invention relates to an electric switch, in particular a rocker switch, comprising a contact system and comprising a movable actuating element for switching over the contact system between two switch positions, in particular an on position and an off position. The switch has a drivable actuator, which is operatively connected to the actuating element in such a way that the actuating element in at least one of the two switch positions is moved, on driving of the actuator, into the other switch position by the actuator for switching the contact system. In particular, the actuating element is moved by the actuator from the on position to the off position of the contact system.

Abstract: An electrical disconnect device includes: a pair of stationary terminals; a movable bridge that is movable between a closed position for making electrical contact between the pair of stationary terminals and an open position for breaking electrical contact; an electromagnetic control system that is switched between an open state in which the movable bridge is positioned in its open position, and a closed state in which it is positioned in its closed position; and a manual drive unit that are drivable between an operational position in which the movable bridge is free to move between its open and closed positions, and a forced-open position in which the manual drive unit holds the movable bridge spaced apart from the pair of stationary terminals. The manual drive unit can be placed in a forced-closed position in which it blocks the movable bridge against the pair of stationary terminals.

Abstract: A safety device is disclosed for a power transformer containing a cooling liquid, and can include a shaped body having an inner chamber which is suitable to be at least partially immersed in cooling liquid and inside which gas can accumulate; a first floating element and a second floating element suitable to be at least partially immersed in and moved by cooling liquid; and a switch suitable to be actuated by the first floating element when the gas accumulated is such that the level of the cooling liquid in the inner chamber reaches a predetermined first threshold level and by the second floating element when the gas accumulated is such that the level of the cooling liquid in the inner chamber reaches a lower predetermined second threshold level, respectively. The first and second floating elements can be mounted on and move linearly relative to one or more corresponding guiding supports.

Abstract: Systems and methods provide a magnetic actuator having more than one air gap. After the trip unit is triggered, a first armature is accelerated to quickly close a first air gap and then mate with a second armature. The first and second armature then move toward a core to close a second air gap and reach the final combined armature position, causing a contact to open. A faster reaction time is provided, yet without increasing the number of turns of the trip coil winding, and provides a more efficient actuator.

Abstract: A multi-phase Medium Voltage Contactor (100) comprising: for each phase, a fixed contact (103) and a movable contact (104) positionable between an open position, in which it is operatively disconnected from the fixed contact (103), and a closed position in which it is operatively connected to the fixed contact (103); an electromagnetic actuator (10) operatively connected to the movable contact (104) and positionable between a first open position corresponding to the open position of the movable contacts (104), and a second closed position corresponding to the closed position of the movable contacts (104); a manual opening device (20) operatively connected to the electromagnetic actuator.

Abstract: An electrical switch for connecting and breaking a circuit including a connecting and breaking mechanism for connecting and breaking the circuit provided with at least a set of movable contacts and stationary contacts; a electromagnetism drive mechanism for controlling the contacts to be actuated so as to realize closed circuit; a housing for accommodating the movable contact and stationary contact; an arc-extinguishing mechanism disposed in the housing and corresponded to the movable and stationary contact; a case connected to a base for accommodating the electromagnetism drive mechanism; a bedplate associated with the case; and a holding mechanism disposed on the bedplate for holding the contacts to connect the circuit, the electromagnetic holding mechanism is electromagnetic and has a set of electromagnetic attracting mechanism in which the movable iron core is made to be a pothook or a baffle mechanism, the movable iron core is attracted so that the pothook or baffle keeps the switch closed by means of hi

Abstract: A trip actuator assembly is provided for a circuit breaker including a housing having a mounting surface, separable contacts enclosed by the housing, and an operating mechanism structured to open and close the separable contacts. The trip actuator assembly includes a trip actuator cooperable with the operating mechanism, and a planar member having first and second ends, first and second edges, and an aperture. The trip actuator is at least partially disposed within the aperture and is further disposed between the planar member and the mounting surface of the housing. The first edge of the planar member is removably coupled to the mounting surface, thereby removably coupling the trip actuator to the housing. The circuit breaker may include an accessory tray which is insertable on and is removable from the mounting surface. When inserted, the accessory tray abuts the body of the trip actuator enclosure further securing the trip actuator.

Abstract: A manual opening device is for an electrical switching apparatus, such as a synchronous circuit breaker, including a housing having an opening, a plurality of pole mechanisms each comprising separable contacts, and at least one operating mechanism including a number of actuators adapted to open and close the separable contacts. The operating mechanism is supported by the housing and includes a corresponding pole shaft. The manual opening device comprises an operating handle, a cam assembly, and a drive assembly. A first end of the operating handle protrudes through the opening of the housing and the second end is coupled to the cam assembly. The drive assembly couples the cam assembly to the corresponding pole shaft of the operating mechanism and cooperates with the corresponding pole shaft and actuators to simultaneously open the separable contacts when the operating handle is moved from a first position to a second position.

Abstract: A detent mechanism comprising a support member having a fixed seating member comprising opposite sides; a first spring for exerting a first spring force, disposed between one side of the fixed seating member and a first sliding member, further comprising a second spring member exerting a second spring force less than said first spring force, disposed between the other side of said fixed seating member and a second sliding member, whereby the forces of the springs are directed to operate on said first and second sliding members in opposite directions. A push button can apply an external force to the first sliding member to move it from a first position relative to the fixed seating member to a second position against the action of said first spring force. A detent mechanism connects the first and second sliding members when the first sliding member is in its second position and the second slidable member is in a first position.

Abstract: A rotary switch adapted to be integrated into a push-to-start electrical control for a clothes dryer or the like employs a rotatable and axially translatable operator having an outwardly extending arm supporting a downward finger which travels across a pivotally mounted and downwardly arcuate lever to open and close contacts mounted on one end of the lever with rotation of the operator. Stops on rotation ensure that the finger is positioned on the lever so as to provide positive biasing of the operator to its end positions. The armature of a relay is actuated by a second arm from the operator contacting the armature within a triangle formed by the electromagnet coil and pivot supports preventing de-stabilization of the armature by the operator. Assembly of the relay to a base of the switch is provided by integrally molded hooks receiving tabs which cover holes necessary for the hook's manufacture.

Abstract: In a switch device, slide plates slide on a microswitch casing independently from each other. When one of the slide plates is slid in a left-hand side direction from its neutral position against a biasing force of a spring, a cam portion thereof depresses an actuator by a predetermined constant amount putting a corresponding microswitch mechanism into an ON state. Similarly, when the other slide plate is slid in a right-hand side direction from its neutral position against a biasing force of the spring, a cam portion thereof depresses another actuator by a predetermined constant amount to put a second microswitch mechanism into an ON state. Each slide plate is operatively, selectively held through a solenoid device at that position where its cam portion depresses the corresponding actuator.

Abstract: An operation mechanism of a circuit breaker which allows either automatic or manual operation of the circuit breaker. The mechanism includes a moving contact lever, a hook lever, a handle, a pair of toggle links connecting the hook lever and the moving contact lever, an operation lever linked to the handle, and a spring connected between the operation lever and a joint of the toggle links. The operation mechanism may also include opening and closing delay latches which preclude movement of the toggle links until the handle has been fully turned to either one of two positions.

Abstract: A resettable circuit interrupter in a ground fault detector circuit utilizes a housing which slideably retains a solenoid coil wound on a bobbin. A contact carrier is attached to the bobbin and one or more moveable contacts are provided on the carrier opposite a corresponding set of fixed contacts. A plunger slides through a central passageway in the solenoid coil. The bobbin is spring biased so that the contacts are in a normally open position. In a manually resettable version, when the solenoid coil conducts a predetermined current, manually activating the plunger causes the plunger to magnetically couple to a footplate attached to the bobbin. When a plunger spring returns the plunger to its original position, the bobbin and contact carrier move with it and the contacts are closed. When the solenoid coil conducts insufficient current to magnetically couple the plunger and footplate, the bias springs maintain the contacts in the normally open position.

Abstract: A manual actuation mechanism for a solenoid having a plunger with one end connected to an external apparatus, such as a diesel engine fuel pump energization of the solenoid coil drives the plunger axially from an initial position to an actuation position. The manual actuation mechanism comprises a retraction rod that extends axially through the solenoid and is movable from a normal position disengaged from the plunger to a retraction position; in moving to its retraction position the rod drives the plunger to its actuated position, simulating energization of the coil. The manual actuation mechanism further includes a retainer comprising a spring clamp mounted on the housing and projecting into firm, resilient gripping engagement with the rotary actuator to preclude vibrational or other incidental rotation of the actuator regardless of its position. The spring clamp also serves as a strain relief for electrical connections to the solenoid.

Abstract: A switching device suitable for use on vehicles as a window regulator switch or a sunroof regulator switch. The switching device comprises a solenoid unit including a yoke, a core and a coil, a first card attached to the core so as to be pressed against a contact for supplying current to the coil of the solenoid unit and to an external load such as a motor, to keep the contact closed while the core is attracted to the yoke, a second card disposed for movement in parallel to the direction of movement of the first card, a pivotally supported operating knob having an operating arm connected to the second card, and a returning mechanism for biasing the operating knob toward the neutral position to return the operating knob to the neutral position when released. When the operating knob is turned to a manual operating position the contact is closed temporarily and is opened when the operating knob is released.

Abstract: Electrically and manually operable stop controls for a musical instrument such as an organ are disclosed. One embodiment of the stop control is a drawknob carried by an a transfer plate mounted for horizontal motion adjacent a solenoid having an iron core. Vertical hinge members at opposite ends of the solenoid support the transfer plate. A permanent magnet is mounted on each hinge member in general alignment with the iron core, the hinge members being spaced apart sufficiently to insure that only one permanent magnet at a time is adjacent the iron core, to thereby provide a manual magnetic and gravity-operated toggle motion. Application of an electrical direct current of selected polarity to the solenoid permits electrical shifting of the transfer plate. In a further embodiment, the drawknob is secured to a pivotally mounted armature having a cross-member which carries permanent magnets. Solenoids are mounted at opposite ends of the cross-member to provide electrical shifting of the armature.

Abstract: A ground fault detecting circuit and trip mechanism for sensing ground fault signals and for interrupting a protection circuit. The trip mechanism includes a cross bar connected by means a pin to a pushbutton. A trip cross bar is rotatably assembled to the frame and engages the cross bar. When a ground fault is detected, a solenoid rotates the trip cross bar to release the cross bar. Two springs connecting the pin for retaining the cross bar pull the pushbutton and cross bar away from the trip cross bar to thereby free a pair of contacts to open the circuit. Subsequently, the trip mechanism can be reset by properly pushing the button to force the cross bar to engage the trip cross bar against the elastic pull of the springs.

Abstract: An electricity power supply circuit including a trip switch having at least one fixed electrical contact (110, 111), a moving electrical contact (120, 121) facing the fixed electrical contact, a control member (130) movable between a working position in which the control member brings the moving electrical contact to bear against the fixed electrical contact and a rest position in which the moving contact is distant from the fixed contact, a holding spring (140) fixed to the control member, a cocking lever (150) movable between a locking position and an unlocking position, said lever including a notch (151) suitable for engaging said holding spring (140), a resilient member (160) suitable for urging the cocking lever towards the unlocking position, an electrical winding (170), and a magnetic body associated therewith.

Abstract: A flush mounted indicating button assembly and operating button assembly each connected to a cover having a pair of holes which receive identical buttons of the assemblies. Each button includes a circular head portion having a flat top surface and a circular base portion having a lesser diameter than the head portion which has a flat bottom surface and defines a collar portion at the bottom of the head portion. The base portion of each bottom is provided with a circumferential channel adjacent the bottom surface which carries a retaining ring. The indicator button is positioned within the hole by a leaf spring member which is connected to the bottom surface of the cover and includes an opening shaped and dimensioned to permit passage of the base portion while preventing passage of the head portion of the button. The opening is in registration with the hole in the cover and a helical coil encircles the base portion intermediate the leaf spring member and the retaining ring.

Abstract: An emergency manual actuation mechanism for a conventional solenoid having a plunger with one end connected to an external apparatus, such as a diesel engine fuel pump, in which energization of the solenoid coil retracts the plunger axially; the mechanism comprises a non-magnetic retraction rod that extends into the solenoid housing in alignment with the solenoid plunger and is axially movable from a normal position disengaged from the plunger to an intermediate position at which a mechanical connection is completed between the rod and the plunger. Further axial or rotary movement of the retraction rod to a retraction position drives the plunger to its retracted position, simulating energization of the solenoid coil. Retainer means hold the retraction rod and the solenoid plunger at their retracted positions.

Abstract: A latching relay includes a housing and a coil secured to the housing. An armature is electromagnetically coupled to the coil such that current to the coil biases the armature to a first position. A spring is coupled to the armature to bias the armature to a second position. The relay includes a switch which includes a movable contact coupled to the armature such that the switch is in a first state when the armature is in the first position and the switch is in a second state when the armature is in the second position. A magnet is movable in the housing between a blocking position, in which the magnet acts as a mechanical block to prevent the armature from moving to the second position, and an unblocking position, in which the magnet allows the armature to move to the second position.

Abstract: A low oil lock-out and/or trip apparatus for a submersible transformer circuit breaker of the type having a manually operated crank shaft assembly for opening and closing the circuit breaker and a fault trip assembly for opening the circuit breaker under fault current conditions, the apparatus including a float assembly which is responsive to changes in oil level in said transformer and a rod carried by said float for blocking the movement of the crankshaft and a trip member for tripping the trip assembly when the oil level drops below a predetermined level in the transformer.

Abstract: A switch to be used for a power window of an automobile or the like is disclosed. It has a switch body. A knob is rotatably axially supported by the switch body. The knob has an accommodating chamber in its inside. A presser is accommodated within the chamber and biased downward by a spring. A pair of contact blades are positioned under the presser. Each of the contact blades is formed at its central portion with a V-shaped portion and inclined surfaces extending toward the right and left directions. The inclined surfaces are further extended to form contact portions. There is formed with a step between the inclined surfaces and the contact portions, so that a first step of operation and a second step of operation of the knob can be made without mistake. Stationary contacts are positioned corresponding to the contact portions. It also has a pair of contact holders. Each of the holders has a supporting piece folded upward from its one side.

Abstract: A solenoid (28) is mounted to a frame (26) secured to panel mounting clips (24) of a pushbutton switch for snap-on attachment to the switch housing (2). The switch has a hollow central chamber and a hole (32) is formed in the lower end (6) adjacent the solenoid (28) whereby an operator cap (10) may be removed and a headed coupling rod (34) inserted through the hollow chamber of the switch to project out the hole (32) for connection to the solenoid plunger (28b). The operator cap (10) is subsequently replaced to permit manual operation of the switch or remote operation wherein the solenoid (28) is energized to pull the pushbutton operator (4) to a depressed position.

Abstract: A miniaturized plug-in cutout/switch is controlled by a push-button (1) and comprises a connection and disconnection mechanism using a captive ball (4d) circulating in a track cage (4a), having two positions selected by successive applications of pressure to the push-button (1) corresponding to the switch connected and switch disconnected states. The cutout/switch includes an independent locking mechanism for a movable contacts (11) which is operated by a bimetallic strip (8) which triggers the opening of the contacts when a current overload occurs in the protected circuit. The simple design of the apparatus permits a miniaturized construction which is particularly advantageous for its use on panels where small dimensions and the rationalization of its shapes make it suitable, for example on aircraft panels.

Abstract: An interlock assembly for a high amperage molded case circuit breaker is provided with a slide biased to interfere with movement of a push to close link whose operation enables discharge of the breaker closing spring. The slide is operated by the toggle assembly in the event the contacts are open to permit operation of the link except if the breaker is being tripped or held tripped. A trip solenoid of the permanent magnet type is reset, when tripped, by a reset spring under control of blade carrier which has excess energy available.

Abstract: A fail-safe solenoid switching mechanism (11) includes separate solenoids (17,18) for switchings to "armed" and "safed" statuses. A manually operated safing mechanism (19) has a capability of overriding the solenoids (17,18) to establish the switching mechanism (11) in the "safed" status. The manually operated safing mechanism (19) is operated by a special tool (41), which is retained by the switching mechanism (11) whenever the manually operated safing mechanism (19) is engaged. The manually operated safing mechanism (19) is held in engagement by a catch (22) whenever the solenoid (17) for arming is powered, thereby preventing the specialized tool from being removed and the switching mechanism (11) from inadvertently switching to the "armed" status. Further status indications are provided by a flag (54) which can be used to directly read the status of the switching assembly (11).The switching assembly (11) uses a reciprocating switch (15) to establish make-or-break connections.

Abstract: The switch includes an electromagnet (9) with a moving core (10) which is retracted when voltage is applied. A configuration of three levers (11, 12, 13) which are fixed together in pairs when the switch is cocked. The first lever (11) is integral with the rotary control shaft (3). The second lever (12) pivots on a stationary middle shaft (23) due to the respective actions of the core being released and of an antagonistic spring (15). The third lever (13) pivots on the end shaft (28), is provided with a return spring (16) and holds the control shaft (3) and the first lever (11) in position by being fixed to the other two levers. The third lever which has a middle lock projection (29) for the first lever also has a transversal passage (24) with a notch (27) in which the free end (25) of the second lever (12) can move, said free end itself having a hooked portion (26) which co-operates with the notch (27) in the tripped position and allowing manual or automatic return to the rest position.

Abstract: An adapter assembly is provided for use with circuit breakers having automatic charge and employing undervoltage release accessory. The adapter is inserted between the undervoltage release tripping mechanism and the circuit breaker operating mechanism to prevent the circuit breaker from tripping from a charged position when the circuit breaker contacts are open. The adapter assembly interferes with the undervoltage tripping lever when the circuit breaker contacts are open to prevent the undervoltage release tripping mechanism from tripping the breaker under conditions of undervoltage or power outage, thus providing a true stored energy device regardless of undervoltage conditions.

Abstract: An electrical switch structure comprising a lever rotatably mounted between neutral position and actuated position, a switching element ON-OFF operated by said lever, a latching means to latch said lever in the actuated position and an unlatching means to rotate back said lever to the neutral position. In one type of the switch said latching means is accomplished by the energization of a solenoid, in other type of the switch said unlatch means being accomplished by said energization of the solenoid.

Abstract: An electrical switching and timing assembly is shown having a manually actuatable switch selectively closable and openable, an associated electrical circuit has an input end and an output end, the input end is intended for connection to a source of electrical potential while the output end is intended for connection to an electrical load, the associated circuit has a timing circuit effective for opening the associated circuit within a preselected span of time after the associated circuit has been closed by the manually actuatable switch, the manually actuatable switch being effective for opening the associated circuit even before the expiration of the preselected span of time; the circuit means, manually actuatable switch means, the input and output ends and timing circuit are carried by unitized support structure.

Abstract: A switching assembly to be incorporated in a window-regulator for a motor vehicle and the like, which includes paired units of switching members, each of which is arranged to serve for operating an electric motor in either of two rotational directions in a manual mode or in an automatic mode subject to the displacing amount of a single switching knob, and an electric circuit means including a solenoid for selectively self-retaining and self-releasing the automatic operating mode. The switching assembly is arranged to be capable of selectively energizing and de-energizing the electric motor incorporated in the window-regulator together with operating the solenoid simultaneously.

Abstract: A switch structure in which manual reset of the automatic knob is performed against the urging force of spring of sliding rod and is not affected by the energizing power supply to be solenoid with much improvement of operational feeling, in which one-way driving type solenoid and automatic knob holding performed by way of detent plate having moderating portion urged by the spring can make the switch means in light weight and small size and in which the usage of movable moderating plate for resetting manual knob makes easy actual installation in the limited space.

Abstract: An electrical switch with a magnetic core for driving a first contact for engaging a second spring mounted contact. A plunger can engage the core to move it into a winding moving the first contact so that current is supplied to the winding for holding the core in inner position when the first and second contacts connect. The plunger carries an arm which can engage the spring mount for the second contact and move it away from the first contact, only when the second contact is in its deflected position by virtue of engagement by the first contact. A housing, an indicator light and connecting terminals are also provided.

Abstract: A rotary switch has a control shaft (8) controlling electrical contacts (not shown). On being moved from the "OFF" position as illustrated towards an "ON" position by turning clockwise (arrow 9), a ramp (21) on a cam (2) engages a cam follower (41) mounted on a first lever arm (3). The first arm is held in position against the thrust of the cam follower's bias spring (42) by a catch (31) engaging a bearing surface (51) of a second lever arm (5). Similarly the second lever (5) is held in position by a spring (52) urging it against the moving part of an electromagnet (7). The electromagnet is shown in its powered position with spring (61) compressed thereby. Turning the shaft also winds up a return spring (not shown) tending to urge the shaft towards the "OFF" position. The shaft is held in the "ON" position by the cam follower (41) engaging in a notch (20) in the cam.When power to the electromagnet fails (i.e.

Abstract: A switch for controlling an electric circuit has a sealed housing and a slidable actuator mounted therein for external manual operation of the switch through a diaphragm. A switch mechanism, mounted within the housing, has an electromagnet, a plurality of pairs of contacts for controlling external electric circuits, a pair of control contacts for controlling the power to the electromagnet, and an armature movable in response to energizing and deenergizing of the electromagnet. When the actuator is pulled outwardly, a projection thereon closes the control pair of contacts, energizing the electromagnet, and causing the armature to close the remaining pairs of contacts and hold closed the control pair. Pushing the actuator inwardly opens the control contact pair, which deenergizes the electromagnet and thereby opens the other pairs of contacts.

Abstract: An auxiliary add-on attachment is disclosed for use in combination with an existing rocker switch. The attachment includes a spring loaded latch mechanism which upon release drives the rocker button to an OFF position. The latch mechanism is released upon retraction of a solenoid plunger when the solenoid is energized by a trip signal which may, for example, be delivered from a timing circuit when a designated machine should be automatically turned off after a certain length of time, such as cathode ray tubes, computers, photocopy machines, etc. Depressing the rocker button back to its ON position loads and resets the latch mechanism.

Abstract: An improvement in a standard electromechanical relay wherein a manually shiftable member simultaneously disconnects the operating coil of the relay and mechanically shifts the relay into an actuated or released condition.

Abstract: A magnetic relay incorporating an electrical interlock function along with a bypass function in which the bypass function needs to be manually set, operates once in a cycle, and is trip free.