Abstract: A keyboard stabilizer is adapted to reduce the clanking and rattling sounds that it makes during operation. The invention takes advantage of the surprising result that adhesive, in proper amounts, can act as a sound dampener. First, a circumferential score is cut near each tip of the wire. Second, adhesive is applied to several critical points on the housings, stems, and wire. Third, lubricant is applied to several critical points on the housings, stems, and wire. The stabilizer is then assembled from the prepared parts.

Abstract: A push switch and a motor vehicle in which such a push switch is used. The push switch has a push cap, a baseplate, a switch element which is actuatable by the push cap, a first lever, and a second lever. The first lever and the second lever are mounted rotatably on the baseplate by means of bearing blocks and are each connected movably to the push cap at a first lever end. At a second lever end, the first lever and the second lever are connected movably to one another. The first lever and the second lever are designed such that they form mass compensation for the push cap.

Abstract: An electrical system includes an enclosure for housing an electrical device. The enclosure includes a door with an operating handle connected to a first shaft that turns the electrical device on or off when the door is closed. The operating handle is further operable to simultaneously rotate a cam assembly, which in turn rotates a second shaft which displaces an interlock mechanism for engagement or disengagement to a busway structure.

Abstract: A mechanical computer keyboard including a plurality of keys and an input/output (i/o) interface for output of registration of pressing one or more of the plurality of keys. Each key includes a keycap, a key switch including a stem, a key registration unit for registering a keystroke, and a spring for forcing the keycap in a neutral release position and providing a perceptible increase in pressing force. The keyboard further includes an analog-to-digital converter and the keys include a distance sensor unit for determining a travel distance of the pushing-down of the keycap by measuring a complex electrical impedance corresponding to the travel distance of the pushing-down the keycap, wherein the analog-to-digital converter is configured to convert the complex electrical impedance to a digital input signal including a digitalized keystroke travel distance for outputting of the digital input signal by the i/o interface towards the computer.

Abstract: A diverter switch is for an on-load tap-changer. The diverter switch includes: at least one vacuum interrupter; an actuating element, which is mechanically connected at a first end of the vacuum interrupter and has a roller at a second end; and an actuating body having a base body and having at least one cam. The vacuum interrupter is configured to be actuated via the actuating element as a result of the roller moving over the actuating body. At least one part of the cam has a higher strength than the base body.

Abstract: A resistor pack assembly including an anti-rotation housing. The anti-rotation housing includes a first surface, a second surface opposite the first surface, one or more anti-rotation lugs extending away from the first surface, and an internal cavity extending from the second surface into the anti-rotation housing towards the first surface. The resistor pack assembly also including a positive rail located at least partially within the internal cavity, a negative rail having an inner circular face and an outer circular face located radially outward from the inner circular face, and an insulator ring is interposed between the second surface of the anti-rotation housing and the outer circular face of the negative rail.

Abstract: A button structure of an input device, including a circuit board, a dome element, and a trigger, is provided. The dome element is disposed on the circuit board, and is electrically conductive and elastic. The trigger is disposed at a center of the dome element, and is electrically insulative and flexible. The trigger has a conductive layer facing the circuit board. The dome element is configured to be pressed to drive the conductive layer of the trigger to abut against a trigger circuit of the circuit board to generate a trigger signal.

Abstract: Embodiments of the disclosure can include an inertial short-circuit and seismic hook for an electrical equipment disconnect switch.

Abstract: A switch includes: an ignition chamber; a pyrotechnic actuator for releasing gas into the ignition chamber upon ignition; a first conductor and a second conductor, the first and second conductors including connection contacts; a third conductor moveable in a direction from a first position towards a second position upon actuation by the pyrotechnic actuator; and a breakable retaining member for retaining the third conductor in the first position prior to actuation by the pyrotechnic actuator, the retaining member breaking upon actuation of the pyrotechnic actuator to allow movement of the third conductor. In the first position, the third conductor is arranged between, and in electrical and physical contact with, the first and second conductors to define a current conduction path. In the second position, the third conductor is electrically and physically separate from the first and second conductors.

Abstract: A dome switch button is installed on a circuit board. The dome switch button includes an elastic piece, a conductive piece and a buffering element. The elastic piece is located over the conductive piece. The buffering element is located under the conductive piece and electrically connected with the circuit board. When the elastic piece is subjected to elastic deformation to trigger the conductive piece, an electric signal is generated. The buffering element is electrically connected with the circuit board. Moreover, a first electric pad and a second electric pad of the circuit board are covered by the buffering element. The electricity from the first electric pad and the second electric pad of the circuit board can be transferred to the conductive piece through the buffering element. Consequently, the conductive piece can be electrically connected with the circuit board without the need of using additional conductor lines.

Abstract: A changeover switch for medium voltage switchgear is provided. The changeover switch includes a first terminal body, a second terminal body, and two elongate pole bodies. The two elongate pole bodies are arranged parallel to each other and rotatably arranged with first ends on opposite sides of, and in direct contact with the first terminal body around a rotation axis. The two elongate pole bodies are rotatable between an open position and a closed position. The second ends of the two elongate pole bodies are positioned in direct contact with opposite sides of the second terminal body. The changeover switch further includes one or more springs arranged between the two elongate pole bodies to urge the two elongate pole bodies towards each other.

Abstract: An actuating mechanism for an electrical switching device includes a frame and a driving member. The driving member is rotatably arranged in the frame around an axis and is movable between a first driver position and a second driver position. The driving member is mechanically linkable to the electrical switching device by a first linking member. The movable contacts of the electrical switching device are in a first position in the first driver position of the driving member and are in a second position in the second driver position of the driving member. The actuating mechanism further includes an actuating member. The actuating member is rotatably arranged in the frame around an axis and is movable between a first actuator position and a second actuator position by hand or based on using a motor. The actuating mechanism further includes a load spring.

Abstract: What is presented is a key module with a cover element and a tappet having a cam nose, wherein the tappet is supported to be movable along a movement axis by the cover element, wherein the tappet has a cylindrical keycap supporting portion in a passage area in which it projects through the cover element and has at least one rib on a guiding portion adjacent to the an keycap supporting portion on an outside. Furthermore, the key module includes a contactor unit formed and arranged to be taken along by the cam nose, and a contact piece formed and arranged for establishing electric contact with the contact nose. Moreover, the key module has a housing element for accommodating the contact piece, the contactor unit and the tappet, wherein the housing element has, for accommodating the guiding portion of the tappet, at least one accommodating bowl with at least one recess for accommodating the at least one rib of the tappet.

Abstract: An elevator derailment detecting device according to the present invention detects the opened and closed states of contacts at first and second safety relays 82 and 83 (steps S1 and S2). Since a first NO contact 82b is closed, a first NC contact 82c is opened, a second NO contact 83b is closed, and a second NC contact 83c is opened, it is determined that there is no circuit failure. Then, the opened and closed state of the contactless relay 84 is detected (step S3). When the contactless relay NO contact 84b is closed and the contactless relay NC contact 84c is opened, it is determined that the counterweight 21 of the elevator 11 is in a derailed state.

Abstract: A shape-memory alloy actuated switch (SMAAS) is provided that enables the stable switching of two separate circuits. The presently disclosed SMAAS includes a substrate, one or more electrical contacts attached to the substrate for connecting to load circuits, and one or more electrically conductive elements for selectively connecting the one or more electrical contacts. The disclosed SMAAS also includes one or more shape-memory alloy actuators attached to the substrate. The one or more shape-memory alloy actuators are configured to move the one or more electrically conductive elements. The shape-memory alloy actuators are self-heated by passing current through the shape-memory alloy material. The disclosed SMAAS may also include electrical contacts to connect an external control current to the shape-memory alloy material. In some examples, the provided SMAAS includes one or more retention mechanisms to prevent movement of the electrically conductive elements after actuation.

Abstract: A safety shutter of the present disclosure comprises: a base unit; a shutter unit; and a cam unit. The base unit is coupled to a cradle of an air circuit breaker, and a terminal connected to a main circuit passes through the base unit. The shutter unit is coupled to the base unit so as to be spaced apart at a predetermined interval, and accommodates the terminal in the space between the shutter unit and the base unit. The cam unit extends from the base unit and penetrates the shutter unit. The shutter unit deactivates insulation by exposing the terminal in the direction of the air circuit breaker when the air circuit breaker is inserted in the direction of the base unit.

Abstract: A modular breaking unit with a holder-guiding assembly, wherein: the modular breaking unit includes a casing unit; a holder for holding a movable contact of the modular breaking unit is accommodated in the casing unit; the movable contact of the modular breaking unit is mounted on the movable contact holder; the holder-guiding assembly is installed in the casing unit and arranged to support and guide the movable contact holder to move between an open position and a closed position; the holder-guiding assembly is made of thermoplastic material; the movable contact holder is made of thermosetting plastic material. A contactor including at least one said modular breaking units.

Abstract: A backlight module including a light guide plate, a circuit board, an electronic component, a reflective sheet, a light-shielding sheet, and a light-emitting component is provided. The light guide plate includes an escape opening. The circuit board is disposed under the light guide plate. The electronic component is disposed on the circuit board, and at least a part of the electronic component is located in the escape opening. The reflective sheet is disposed on the rear surface of the light guide plate and between the light guide plate and the circuit board, and the reflective sheet extends into the escape opening. The light-shielding sheet is disposed on the light emitting surface of the light guide plate opposite to the rear surface. The light-emitting component is disposed on the light guide plate. A luminous keyboard using this backlight module is also provided.

Abstract: A high voltage electric disconnect switch having a rotatable switch blade in operative arrangement with a rotatable high voltage electrical insulator. A rotating bearing assembly in operative supporting arrangement with a rotatable shaft. The bearing assembly containing corrodible ball bearing assemblies including associated corrodible ball bearing races. The rotatable insulator is operatively mounted to the rotatable shaft. The rotatable shaft has a lower rotatable shaft portion contacting the corrodible ball bearing assemblies housed within a sealed housing of the bearing assembly. An air permeable hydrophobic membrane mounted in a membrane assembly is mounted in an aperture of the housing to eliminate condensing humidity within the housing, thereby preventing corrosion of the corrodible ball bearings and races, freezing water, and lubrication degradation by keeping the surfaces dry to prevent switch failure.

Abstract: A temperature sensor installing device for a power relay assembly is configured to be attached to a lower surface of a bus bar attached to a heating surface of the power relay assembly. The temperature sensor installing device includes: a body housing; a temperature sensor insertion recess formed in an upper portion of the body housing and accommodating a temperature sensor such that a temperature sensing surface of the temperature sensor faces upward; and a nut insertion recess formed in the upper portion of the body housing and accommodating a nut.