Abstract: Embodiments of a disconnector and a switchgear, wherein the disconnector comprises a contact assembly operable to change a status of a circuit, the disconnector arranged in the circuit; shafts adapted to be driven to rotate to operate the contact assembly; and a transmission unit arranged between the shafts and comprising: a plurality of gears coupled to the shafts to enable the shafts to rotate with a mutual engagement of the plurality of gears; and a holding assembly adapted to hold radial positions of the plurality of gears to ensure the mutual engagement of the plurality of gears. By arranging the holding assembly to hold the radial positions of the gears to ensure the mutual engagement of the plurality of gears, only one input shaft and one transmission unit are enough to transmit large torques sufficient to operate the contact assembly.

Abstract: An on-load tap-changer has a transmission, a motor with an output shaft, and a diverter switch with a drive shaft. The transmission has a cam disk; a drive gear wheel; and a roller coupled to the drive gear wheel. The cam disk is connected the output shaft, which lies on a rotation axis of the cam disk. The drive gear wheel is connected to the drive shaft. The cam disk has an inner and outer contour, which are followed by the roller, and which each have a first region with a constant radius of curvature and a second region in which a distance of a respective contour from the rotation axis of the cam disk changes. During a rotational movement of the cam disk, the roller follows the first region of the outer contour, the second region of the outer contour, and then the first region of the inner contour.

Abstract: Provided is a spring drive cam for a spring drive of a circuit breaker including a disc-like shape configured for rotating around a rotation axis in the spring drive, whereby the disc-like shape comprises a radius (R) that changes depending on an angle (?) of the radius (R) relative to a base angle (?0), and whereby a rate (dR/d?) defined by a change of the radius (R) per change of the angle (?) is ?0.3 mm/°.

Abstract: Apparatus are disclosed for vehicle connectors for monitoring connection with trailer connectors. An example connector of a vehicle for coupling a trailer to the vehicle includes a wall defining a cavity to receive a trailer connector, a seal to engage the trailer connector when the cavity receives the trailer connector, and a first trailer-connection sensor disposed in the seal to monitor engagement of the trailer connector with the seal to identify a secure connection with the trailer connector.

Abstract: A gas-insulated circuit breaker is disclosed that includes a housing defining a gas volume for a dielectric gas; a nominal contact system and an interruption contact system with a pin and a tulip that they are electrically connectable to and disconnectable from one another along an axis. The circuit breaker includes a guiding assembly including a guide sleeve and a guiding member that is coupled to the pin; and a gas damping assembly configured to damp a breaking movement of the pin by compressing the dielectric gas in an absorber volume. A movable absorption element and the absorber volume are arranged radially inward of the guide sleeve.

Abstract: A footswitch for a medical instrument, with a housing, and with an elastically deformable suction cup arranged in the housing, where a negative pressure is generated in the suction cup by means of an evacuation device in order to secure the housing to a floor surface. In order to create a footswitch which is suitable for a medical instrument and which, while having a simple design and being easy to handle, ensures that the footswitch is secured in a fixed position on a floor surface. The suction cup is elastically extensible via the evacuation device in order to generate the negative pressure by enlargement of the volume enclosed by the suction cup.

Abstract: A button locking device includes a panel, a button installed on the panel, a bottom plate installed under the button, a first cylinder spring installed between the button and the bottom plate for resetting the button, an actuator assembly installed between the panel and the bottom plate, a toggle member installed under the button and pushed by the actuator assembly to rotate from a first position to a second position and rotated from the second position to the first position. At the first position, the toggle member stops the button from moving downward. At the second position, the toggle member allows the button to move downward. The present invention has the features of simple structure, convenient operation, low power consumption, high safety, and broad scope of applicability.

Abstract: The fuse bypass jumper of the present invention bridges the upper and lower fuse terminals of a high-voltage transmission line cut-out box so as to bypass the fuse element. The jumper comprises lateral upper and lower arms connected by a longitudinal jumper bar. The jumper arms and bar are made of a heavy gauge conductor rated for at least 100 Amps. With the jumper in place, the fuse element can be opened, removed and/or replaced without interrupting the transmission line circuit through the cut-off box, since the jumper now provides a bypass around the fuse. Since the bypass conductive path constitutes a heavy gauge, high-amperage bar conductor, this jumper can carry a much larger current load than flexible wire-based jumpers.

Abstract: An actuator that includes a shelf having a pivot cone, a first member, a second member, a trigger pin and a trigger lever latch. The first member includes a weight, a first shaft extending upwardly from the weight and through an opening in the pivot cone, and a first plate affixed to the first shaft. The first plate is supported by the pivot cone. The second member includes a second plate resting on the first plate and a second shaft extending upwardly from the second plate. The trigger lever latch includes a first portion connected to the second shaft and a second portion extending upwardly at an angle away from the first portion. The trigger pin has an engagement surface. The trigger pin is movable between an operational state and a tripped state. The second end of the trigger lever latch is engaged with the engagement surface.

Abstract: A housing having activated structure by remotely activates an embedded switch. The case includes a front panel having an inner and outer surface, an operation button, a first elastic member, a latch member having a lead-in portion at one end and an activating portion at the other end, and a lever. The operation button is arranged on the outer face and contacts the lead-in portion. The lever pivotally connects the front panel and selectively contacts the latch member and the switch. When the operation button is pressed, the first elastic member is compressed and the lead-in portion shifts accordingly. The activating portion further applies a force to the lever which then tilts toward the switch, allowing activation. When the first elastic member decompresses, a force applies to the latch member and the latch member returns to the original position.

Abstract: A switching apparatus for closing and/or opening an electric circuit. It has an actuating unit and a bistable mechanism. The actuating unit is linearly movable between a first end position in which the switching apparatus is in a closed state and a second end position in which the switching apparatus is in an open state. The linear movement defines an axis. The bistable mechanism is arranged to ensure that the actuating unit is held in either of the end positions. The bistable mechanism includes a cam means mechanically connected to the actuating unit and at least one cam follower. The invention also relates to a use of the invented apparatus.

Abstract: An improved operating mechanism of a molded case circuit breaker comprises a housing, a fixed contact means, a moving contact means, a rotor means, and a mechanism module. The mechanism module comprises side plate means, trip plate means, a lower link means, an upper link means, a latch link means, a fork link means, a spring pin means, a floating pin means, navigation pin means, reset roller pin means and plurality of spring means.

Abstract: A retractable control device for a household electrical appliance includes a knob movable against an elastic member within an aperture or seat of a control interface of the appliance. The knob is configured to assume two working positions including a first position in which the knob is seated in the aperture and a second position in which the knob extends outwardly therefrom. The knob cooperates with a control member for a functional element of the appliance, such as an electrical resistance heater or microwave generator of an oven, or a gas burner of a cooking hob. The device also includes a cylindrical element disposed and fixed in the aperture of the control interface about the knob. The cylindrical element contains the knob when the knob is in its first position and guides its movement within the aperture along a central longitudinal axis thereof.

Abstract: A pushbutton of a portable apparatus is locked against inward axial movement by engagement with a locking member when the locking member is unthreaded a distance A from the apparatus body and brought into abutment with a fixed stopper member. The pushbutton is released from its locked state when the locking member is threaded into the apparatus body and brought out of abutment with the stopper member and into abutment with the apparatus body. In its unlocked state, a head portion of the pushbutton is axially spaced a distance B from an opposedly facing portion of the locking member, wherein A?B.

Abstract: A switch lock for an electrical switching device, e.g. a circuit breaker, motor circuit breaker, or isolating switch, which is an improved switch lock, that can be made with fewer parts and at lower cost. Furthermore, an electrical switching device can contain this switch lock. Due to an appropriate arrangement of the spring coupling points and an appropriate spring dimensioning, as well as an appropriate geometric design of the contact piece holder, this switch lock can do without separate lock and contact pressure springs, insofar as their functions are combined in one spring.

Abstract: A keypad assembly is used for an electronic device. The keypad assembly includes a support member, a plurality of key strips and a plurality of elastic members. The support member defines a plurality of receiving grooves each with an angled bottom surface. The key strips are received in the receiving grooves. The elastic members are received in the receiving grooves, and each elastic member abuts a corresponding key strip providing a biasing force to extend a portion of the key strips from the receiving groove.

Abstract: A rotary control device includes a body, a knob rotatably provided on the body, a push button provided on a side portion of the knob so as to be depressed, a lock member that moves in response to a depressing operation of the push button, and a lock portion provided in the body. The lock member is retained to the lock portion of the body so as to restrain a rotary operation of the knob before the push button is depressed. When the push button is depressed, the lock member is moved to a space where the lock member is movable in conjunction with the rotary operation of the knob so that a restraint of the rotary operation of the knob is released.

Abstract: A rotary knob for an electrical system includes a body containing a rotary maneuvering member which actuates a cam-driving part and bears one or more electrical units. A cup is defined between an outer cylindrical flange of the body and an inner cylindrical sleeve, and contains a spring either of a helical type for urging a sliding ring separate from the driving part, or of a torsion type to return the maneuvering member. The ring provides a sensitivity function. The cylindrical sleeve defines in a central opening thereof a centering seat of the shank of the maneuvering member.

Abstract: A latching device has a resetting device, a triggering device for producing a triggering force which acts in a first direction, a compression element, and an upper and a lower supporting element which, in the latched state, are arranged one above the other in a housing and are connected to each other by at least one coupler such that they are at a distance from each other, and which, in the latched state, are acted upon, to provide a spring-type drive, by a compressive force applied along a line of action via the compression element. The lower supporting element, loaded by the compressive force in the latched state, is deflected against a stop and is held in that position. The paths of movement of the upper and of the lower supporting element are defined by the housing by way of guides. The path of movement for the lower supporting element runs substantially perpendicular to the path of movement of the upper supporting element.

Abstract: A locking switch assembly includes a cam, a plunger, and a locking mechanism. The cam is rotatably attached to a frame assembly and an end of the plunger is constructed to follow a contour of the cam. The plunger is movable between a plunger first position and a plunger second position. A pin is biased against the plunger and movable between a pin first position and a pin second position and locks the plunger in the plunger second position when the pin is in the pin second position. A breakable arm prevents movement of the plunger from the plunger second position to the plunger first position unless a force above a selected amount is applied to the cam when the plunger is in the plunger second position.

Abstract: A circuit breaker includes a housing and an operating mechanism having a cross bar supported by a first housing surface and moving in an arcuate path between open/tripped and closed positions, a pivotally mounted cradle including a latch, and pivotally mounted primary and secondary latches. The primary latch includes a pivot, an opening and a free end. The cradle latch rests within the opening when the contacts are not tripped open. The secondary latch includes a pivot and a surface. The latches are between a second housing surface and the cross bar in a first position. The cross bar is offset from the latches in a second position. The secondary latch surface and pivot are between the second housing surface and the primary latch pivot. The secondary latch surface engages the primary latch free end when the contacts are not tripped open and maintain the cradle latch within the opening.

Abstract: A switching device includes a latching mechanism and is cheap to produce and easy to assemble. To this end, the construction is essentially formed from a three-part modular unit including metallic material, and has a spring which supports the back-latching of the latching mechanism, and forces which extend essentially in one plane in the latching mechanism.

Abstract: An electrical switch includes a switching contact arrangement, an interchangeable release block and a locking element. A first operating surface is formed on the locking element, which can be moved from a locked position to an unlocked position. The first operating surface allows the release block to be secured from being removed from the switch, when the locking element is in its locked position.

Abstract: A circuit breaker having a crank for coupling a switching mechanism to the contact pole structure is presented. The crank has a pair of cam surfaces which cooperate with a blocking lever to restrict movement of the operating handle when the contacts of the circuit breaker are welded. The blocking lever is arranged such that it does not interfere with the handle under normal operating conditions.

Abstract: An air circuit breaker bell alarm lock-out accessory interacts with the circuit breaker closing system to prevent charging of the circuit breaker closing spring until and unless the bell alarm module has been manually reset. A lockout slide on the bell alarm module support interacts with the circuit breaker closing spring operating link to prevent the recharging of the closing spring.

Abstract: A circuit breaker includes a releasable retaining mechanism for releasably retaining a movable contact arm of the circuit breaker to prevent "sneak" during movement of the contact arm to the closed position, as well as, to prevent "bounce" during movement of the contact arm to the open position. The releasable retaining mechanism preferably includes a hook member rigidly secured to the movable contact arm and a retaining spring secured to the operating mechanism of the circuit breaker. The hook member engages the retaining spring when the movable contact arm is in the open position. The releasable retaining mechanism further includes a release finger extending from the operating mechanism adjacent the retaining spring, the release finger being positioned to contact the retaining spring when an operating handle of the circuit breaker is moved to actuate the operating mechanism in order to place the movable contact arm in a closed 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 molded case circuit breaker has a moving conductor assembly which includes a modular carrier assembly incorporating a plurality of spring biased contact cam members each of which engages contact pressure lobes on a pair of contact arm laminations to provide contact pressure. In response to the magnetic repulsion forces generated by a short circuit, the springs compress allowing the cam members to pivot and side step the contact pressure lobes so that the contact arm blows-open with little resistance. The cam members and springs are preassembled in a transverse channel in the carrier body and laterally retained in place by side plates for easier pivotal attachment of the contact arm laminations to the lobes on the side plates. The side plate lobes raise the contact arm relative to the mass of the carrier to reduce eddy current heating and provide a positive off indication for welded contacts by restricting movement of lower toggle links of the operating mechanism which are coplanar with the side plates.

Abstract: A switchable light fixture which may be usefully be employed as an interior automotive lighting fixture includes an insulating plate defining an interior cavity in which a sliding piece is disposed and supports an opposed pair of lamp sockets for holding a lamp. A plurality of stationary parallel contacts (at least two of which form a pair of lateral stationary contacts, and one of which forms a middle stationary contact) are positionally held by means of recessed surfaces or channels defined between respective upright supports. A pair of lateral plugs each formed by an outwardly bent terminal end portion of a respective one of the lateral stationary contacts is positioned in a respective pair of the recessed surfaces or defined channels so as to be disposed over the lateral pair of stationary contacts, with a middle plug being portioned between the pair of lateral plugs.

Abstract: The present invention relates to an auto-switch which is used for a control circuit of a power window for moving automobile window glass up and down using an electric window motor, and has a manual/automatic contact, wherein the auto-switch is operably by a single operating knob. In the auto-state, the auto-switch can mechanically retain the manual/automatic contact at a closed state, and can always reset the operating knob to the neutral position.

Abstract: An electrical connector, for example a lampholder comprises an on/off switch mechanism including a push bar. The connector further comprises a locking arrangement including an interlock member which extends to the pushbar and moves into and out of cooperation with an aperture in the pushbar. When a cooperating device, for example a lamp, is inserted into the connector the interlock member moves axially into the lampholder to a position at which the pushbar is free to move between "on" and "off" positions. When no cooperating device is connected, the interlock member prevents movement of the pushbar. The pushbar and the interlock member include respective inclined surfaces arranged such that the pushbar will be moved to the "off" position when a cooperating device is removed from the connector.

Abstract: The sliding mechanism (50) of a drawout type switchgear has a first slide arm (5) which is slidably supported by the upper and lower support rails (3A, 3B) and a second slide arm (7) which is slidably supported by the first slide arm (5). The second slide arm (7) is interlocked with the first slide arm (5) by a lock plate (12) when the first slide arm (5) is sliding from a connected position to a final drawout position of the first slide arm (5). When the first slide arm (5) reaches the final drawout position of the first slide arm (5), the interlocked second slide arm (7) is released by rotation of the lock plate (12).

Abstract: A force-storing actuator for connection to a rotor of a step transformer has a central upright axle connected to the rotor and rotatable about its axis, and upper and lower input wheels fixed rotationally to each other and rotatable on the shaft about the axis. Respective upper and lower drive elements fixed underneath and atop the input wheels flank upper and lower force-storing levers rotatable on the shaft between the input wheels and juxtaposed with the input wheels. Each lever is angularly engageable with the respective drive element. A spring has outer ends connected to the two levers offset from the axis. An output wheel fixed on the shaft above the upper input wheel carries an output element fixed on the shaft axially between the levers and engageable angularly with both of the levers.

Abstract: In a snap locking mechanism for rotary switches an operating shaft (4) operable by a switch handle can be rotated against the force of an energy-storage mechanism and each lock-in position is occupied with at least partial release of the energy-storage mechanism. The energy-storage mechanism is formed by axially acting compression springs (8) and acts on a driver ring (6) exhibiting slopes in the peripheral direction which interacts with another driver ring (13), couplable with the operating shaft, exhibiting a corresponding counterprofile with slopes. A coupling for dragged slaving (28, 29) is provided between the two driver rings (6, 13). Handle-side driver ring (6) carries stops (11) on its front facing away from these slopes, which interact with counterstops (12), integral with the housing, when they reach the snap position of the locking mechanism.

Abstract: A lock having depending sides with holes therein is snap fit attached to a rocker actuator by causing the sides to straddle the actuator and the holes to receive beveled lateral tabs on the actuator, the holes being longer than the tabs to permit and define sliding movement of the lock on the actuator. Four feet depend from the depending sides of the lock within a housing opening in which the actuator is pivotally mounted to abuttingly align with corresponding abutments in the housing on opposite sides of the pivotal axis of the actuator, preventing rotational movement of the actuator when the lock is in a first position with respect thereto under the bias of a compression spring. The actuator is released by sliding the lock against the bias of the spring to move the feet radially offset from the abutments, thereby permitting rotational movement of the actuator in either direction, actuating corresponding switch contacts.

Abstract: An accessory module (104) for use with a circuit breaker (10) is configured for mounting to the breaker, and has a rotor (142) which follows the movement of the circuit breaker blade (24) in the breaker by means of a coupling member (118) passing through a passage (110) in the circuit breaker wall. A portion of the rotor is configured as a cam (162) operating a switch (152) in the module, the switch thus giving a reliable indication of the position of the breaker blade. The breaker is preferably of the type which has a trip lever (50) carried on the breaker blade and mounted for slight movement thereon, and the rotor is preferably coupled to the trip lever. A solenoid (148) within the accessory module is disposed to rotate the rotor when energized, this rotation being coupled to trip the breaker to provide for remote tripping. Since the trip lever is carried with the breaker blade, the blade position is monitored by the switch.

Abstract: An assembly frame having first and second frame plates secures the movable parts of a breaker assembly together for ready assembly of the breaker assembly in a housing. A pivot pin supports the trip lever between the frame plates. The movable contact carrying blade has an elongated hole through which the pivot pin passes, the elongated hole forming a floating point for the pivot pin.

Abstract: A switch device comprising an operating knob adapted to be selectively operated according to an operational amount and permit an automatic restoring condition and an automatic locking condition, a first selector member interlocking with the operating knob for effecting a switching operation of contacts, a second selector member engageable with the first selector member for selectively effecting the automatic restoring condition and the automatic locking condition of the operating knob, a switch wafer provided in opposed relationship to the first and second selector members, a locking member adapted to restrict movement of the second selector member, and a resilient member for biasing the locking member toward the second selector member. With this structure, the automatic locking condition may be maintained without the use of a solenoid, thereby reducing the power consumption and heat generation.

Abstract: A safety device to protect a piece of domestic electrical apparatus connected by means of a flexible supply lead to a plug to be attached to a conventional mains outlet. Between the pins of the plug and the exposed electrical working components of the apparatus is provided an on-off switch which will isolate the electrical operating components from the mains supply when the switch is in the "off" position. Sensor means are positioned within the piece of domestic electrical apparatus adjacent any exposed electrical components and control means for detecting a path of conduction between the sensor means and those exposed electrical components. Magnetically controlled release means including a permanent magnet and an electrically induced magnetic field in opposition thereto, preferably a DC motor provides movement when energized by the control means when the latter detect a path of conduction.

Abstract: A high-voltage switching device is provided having an insulating base member mounted to a panel such that a wiper arm assembly of the switching device is accessible from the front of the panel for pivoting a switching member between open and closed positions. Preferably, the switching member is a conductive rod having a portion coiled about a primary terminal assembly of the switch such that a first end of the conductive rod may be pivoted about the axis of the coiled portion between the open and closed positions. Although the switch is intended for high-voltage applications, the conductive rod is of sufficiently small gauge so as to allow for the manual pivoting of the rod without the need of leveraging linkages. The insulating base member of the switching device provides effective electronic isolation of the terminal assemblies and the conductive rod from one another and from the ambient environment of the switch such that a protective insulating housing is unnecessary.

Abstract: An air circuit interrupter which comprises a first cam driven by the operating handle which, through a charge lever, charges an energy storing spring, a link mechanism for transmitting the stored spring force to a contact operating mechanism, a contact-opening-waiting mechanism for preventing the link mechanism from driving the contact operating mechanism to open when the contact is closed by an action of a spring force of a contacting pressure spring in the contact operating mechanism and an electromagnetic repulsive force acting on a current carrying member due to a current above a predetermined value, and an OFF operating member for opening the contact by releasing the contact-opening-waiting state of the contact-opening-waiting mechanism. The contact-opening-waiting mechanism comprises a second cam connected to the link mechanism and a trip latch having an engaging roller for engaging the second cam and an engaging portion for engaging the OFF operating member.

Abstract: For cocking an energy accumulator, an actuating device comprises a ratchet wheel with teeth as well as a reciprocating transport ratchet. For maintaining the cocked position of the energy accumulator, a cam wheel and blocking lever which can be braced against a blocking member via a ratchet lever are provided. Due to a wedge-like cooperation between a working surface of the cam wheel and a projection of the blocking lever, the blocking lever is transferred from its rest position into a blocked position if the deadcenter position of the cam wheel is exceeded. In the process, the transport ratchet is lifted from the teeth of the ratchet wheel by means of a striking surface of the blocking lever.

Abstract: The rotary electrical switch 1 which is mounted on a circuit plate 7 furnished with a printed circuit comprises a switch wheel 4 which is rotatably supported on the circuit plate 7 and whereat a contact bridge 48 is inserted into a pocket 46. On rotation of the rotary switch 1, said contact bridge 48 connects and/or disconnects at least two conducting paths of the printed circuit. Shaped at the switch wheel 4 is a pivot pin 17 which penetrates the circuit plate 7 and which is secured by a base member 5 to the circuit plate 7 on the said's bottom side opposite to the printed circuit. The switch wheel 4 includes catch-type recesses 42, with a resilient switching element 32 engaging into each one recess depending on the position of rotation of the switch wheel 4. The base member 5 urges via the switch wheel 4 the contact lugs 48 resiliently against the circuit plate 7, additionally forms the catch-type element 40 and simultaneously couples the switch wheel 4 and the circuit plate 7.

Abstract: An alarm device is provided consisting of a non-conductive base with two conductive inserts, a latch mechanism integral to a base and a trip device which is connected to a coil spring. A set of L-shaped legs are attached to each end of the coil spring and one leg coacts with the latch mechanism and is released when the trip device is activated, and the other leg coacts with one of the inserts and the coil spring coacts with the other when the trip device is activated.

Abstract: An apparatus has a part which can be moved to an operating position by an actuating device, in response to movement of a button to an on position. Upon movement of the part to its operating position, a latching member directly associated with the part latches the button in its on position. Upon sensing a predetermined condition in the apparatus, a control member prevents the transmission of the actuating movement by the actuating device to the part, and a user becomes aware that the part has not moved to its operating position because the button does not become latched in its on position.

Abstract: A motor protection electric switch, and the like, in which contacts are opened and closed by means of a switch latch equipped with an "on" button and an "off" button, with the different positions of the "on" button indicating the switching state of the contacts. A two-armed blocking lever is rotatably mounted on a latch housing of the switch, and disposed between the contact member carrier and the "on" button. One arm of the lever is latched with the "on" button while the other arm thereof is supported at the contact member carrier as long as the contacts are not opened sufficiently far to open a circuit through the contacts of the switch.

Abstract: An electric disconnect switch having fixed and movable contacts includes a latch mounted for limited oscillating and sliding movement on the movable contact and operable by a manual operating member, a ramp fixedly mounted on the fixed contact and having a latching surface engageable by the latch, a biasing device arranged to bias the latch in a direction to maintain the latch in engagement with the latching surface, together with a low friction device mounted on the movable contact and engageable with a part of the latch during a switch closing operation to impart closing movement to the movable contact in response to closing movement of the operating member.

Abstract: An actuation attachment includes a central slider formed at one end with a push button and at the opposite end with a holding piece for an actuator. The slider is inserted in a cylindrical sleeve so as to be movable in axial direction either relative to or in conjunction with the sleeve but engaging it for joint rotation. The sleeve is inserted in a cylindrical bore of a housing to move in axial direction and to rotate about its central axis. The slider is formed with an axially directed slot for accommodating opposite rear ends of two locking pins which are guided in corresponding radially directed bores in the sleeve. The locking pins are urged one from the other by a biasing spring. The cylindrical bore of the housing is formed with axially directed first and second guiding grooves for engaging rounded front ends of the locking pins. Each of the guiding grooves is separated by an inclined stopping surface and a radially directed stopping surface.

Abstract: A stored-energy switch operating mechanism is provided that includes a charging arrangement that reduces the peak forces required during the charging of the operating mechanism to store operating energy. The charging arrangement is responsive to a unidirectional input to accomplish the charging of the operating mechanism. In an illustrative arrangement, the operating mechanism includes a closing spring and an opening spring. During charging, the springs are sequentially charged prior to any switch-closing or switch-opening operation. The operating mechanism does not require the detachment of any components during either charging or switch operation. The charging arrangement, in an illustrative embodiment, is responsive to a unidirectional rotary input to a charging crank to sequentially drive a charging element in a first direction and then in a second, opposite direction. In the first direction, a first of the springs is charged and latched. In the second direction, the second spring is charged and latched.

Abstract: An isolation switch has at least one first cam attached to a blade of the isolation switch, the first cam arranged to rotate about a first axis. At least one second cam is arranged to rotate about a second axis. The first and second cams engage so that rotation of the second cam in a first rotational sense urges rotation of the first cam so as to engage the blade with a fixed contact, thereby closing the isolation switch. The first cam, when under the influence of electromagnetic forces resulting from current flow through the isolation switch tending to open the isolation switch, urges rotation of the second cam in the first rotational sense.