Abstract: A pin jack fabricated of an insulating material defines therein an elongated hole for receiving a pin contact of a mating pin plug, the hole having a forward portion of a large inner diameter near the open end of the pin jack and a rear portion of the smaller inner diameter. First and second contacts are disposed in the large-diametered portion and a third contact is disposed in the smaller-diametered portion.

Abstract: A plurality of spring housing holes are formed in a first surface of an insulation block of a socket connector, and contact insertion holes are formed in a second surface of the block in communication with the spring housing holes. In each spring housing hole, a coil spring is housed, and the insulation block holds a terminal connected to the corresponding coil spring. A plurality of plug contacts are arranged and embedded in an insulation body of a plug connector. When the plug contacts are inserted into the contact insertion holes, the plug contacts are inserted and engaged between coils of the coil springs to connect the plug contacts and springs electrically with each other.

Abstract: A method for the manufacture of a ferroelectric liquid crystal cell which includes ferroelectric liquid crystal sealed between a pair of opposed but spaced plates, each having formed on one surface a pattern of conductive layer, the plates being disposed with their conductive layers facing each other, comprises the step of rubbing the surfaces of the plates in at least two directions prior to the sealing of the ferroelectric liquid crystal.

Abstract: A connector plug, for engagement with a connector socket, has a main positioning protrusion extending from the front marginal edge of a cylindrical metal cover in its axial direction and protruding outwardly from its outer peripheral surface. The cylindrical metal cover also includes a cut-away portion, along its front marginal edge, which defines two corner portions that cooperate with the main positioning protrusion to position the connector plug relative to the connector socket.

Abstract: A contact plate is provided in obliquely opposing relation to a flange part of a high-voltage side discharge electrode disposed in a high-voltage chamber of a CRT socket. A movable urging member is movable into and away from a place where the urging member presses the contact plate against the flange part. A lead insertion hole is bored through the high-voltage chamber above the contact plate so that a high-voltage lead can be inserted through the lead insertion hole into between the contact plate and the flange.

Abstract: A planar display device is disclosed, which comprises a plurality of display elements in rows and columns, row drive lines each commonly connected to two adjacent rows of display elements and column drive lines are provided in pairs each for each column of display elements, every other one of the display elements in a column being connected to one of the pair of column drive lines, and the other display elements in the column being connected to the other column drive lines in the pair. Each of the display elements is selectively activated by the row and column drive lines connected thereto.

Abstract: A square-shaped body of an insulating material has a plurality of contact housing holes bored therethrough and arranged in a matrix form, and pin contacts are respectively housed in the contact housing holes. Cords of a shielded cable are connected at one end to the rear ends of the pin contacts. A cable clamper is put on and fixed to the shielded cable and the shield of the shielded cable is connected to the inner surface of the cable clamper. The cable clamper is fitted in and fixed to the rear end portion of a tubular shielding member made of metal and the square-shaped body is fitted in and fixed to the front end portion of the shielding member.

Abstract: In the disclosed electrical connector, the card inserted from the inlet is moved, together with the slider abutting against this card, in a state being inclined to the specified placing plane, resisting the thrusting force to the inlet side by the thrusting means, and when this card and slider reach the specified position, the card and slider are oscillated about the oscillating fulcrum part to position them on the specified placing plane, thereby causing the contact formed on the contact piece part of the conductor piece to contact elastically with the contact of the card, while fixed the slider on the specified placing plane by the lock mechanism.

Abstract: In an active color liquid crystal display element in which display electrodes are arranged in a matrix form within a liquid crystal cell, color filters of three primary colors are each disposed opposite one of the display electrodes, the color filters of the three colors being distributed substantially uniformly, and a thin film transistor connected to each display electrode is controlled, by switching, in accordance with an input color image signal to charge and discharge the display electrode for displaying a color image, the structures of the thin film transistors are selected corresponding to the color filters of the three primary colors so that substantially the same light transmission-voltage characteristic is provided for all the three color filter portions.

Abstract: A plug body has, on its front, a cylindrical portion integrally molded therewith and a ferrule is disposed in the cylindrical portion along its axis. The front end portion of the ferrule projects out of the cylindrical portion and the rear end portion is inserted in the plug body. An optical fiber exposed at the front end of an optical fiber cable is fitted in the front end portion of the ferrule and the rear end portion of the optical fiber cable is led out from the back of the plug body.

Abstract: Liquid crystal is sealed in between a pair of opposed first and second transparent substrates, picture element electrodes, gate buses, and source buses are formed on the first transparent substrate, and thin film transistors are each disposed at one of the intersections of the source and gate buses, thereby constituting an active matrix liquid crystal display element. On the first transparent substrate there are provided capacitive electrodes respectively opposite the source buses, with an insulating layer interposed therebetween, and the capacitive electrodes are connected to a common potential point.

Abstract: A jack, e.g., a. modular telephone jack, is formed by providing plug inserting hole in the front end of an insulating body; terminal inserting holes and first contact insertion slots communicating with each other are formed on the back end of the insulating body; and second contact insertion slots communicating with the front ends of the first contact insertion slots are formed in the front end of the insulating body. Terminals holding cords, respectively, are inserted in the terminal insertion holes, and fork-shaped first contacts extended laterally integrally from the terminals are inserted in the first contact insertion slots. Plate-shaped second contacts are inserted in the second contact insertion slots to engage with the first contacts, and free end portions of the second contacts are folded back towards the inside of the plug insertion hole.

Abstract: The pin jack body made of an insulating material has a through hole, for receiving the mating pin contact, the front part of the pin jack body is covered with a metal cover, and the through hole of the pin jack body has housed therein a jack contact. An optical element holder is mounted on the back of the pin jack body. The optical element holder has a guide hole axially aligned with the through hole. When an optical element is inserted into the holder, the light emitting or light receiving face of the optical element faces opposite the through hole through the guide hole.

Abstract: A method of printing characters on key tops made of a resin comprises the steps of printing character patterns on the key tops using an ink obtained by adding a coloring agent to a multifunctional acrylic ultraviolet-ray-curable paint and subsequently hardening the printed ink character patterns by irradiating the printed surface of each key top with ultraviolet rays.

Abstract: A liquid-crystal cell is formed with first and second transparent substrates opposing each other and a liquid crystal sealed therebetween. A plurality of display electrodes are formed in a matrix arrangement with rows and columns on the inner surface of said first transparent substrate. Gate bus lines are formed on the first transparent substrate along the respective rows of display electrodes. Source bus lines are formed on the first transparent substrate along the respective columns of display electrodes. Thin-film transistors are formed on the first transparent substrate at the intersections of the gate and source bus lines. The thin-film transistors each have a gate electrode connected to the associated gate bus line, a source electrode connected to the associated source bus line and the drain electrode connected to a corresponding display electrode. A common electrode is formed on the second transparent substrate such that it faces the display electrodes.

Abstract: Locking springs project from a plug body, and support bars are axially movably held against the locking springs. The support bars axially engage a coupling sleeve through engagement members. With the support bars in engagement with the coupling sleeve, the support bars are urged to move in a forward direction under the bias of a coil spring. When a plug is to be coupled to a socket, the support bars are caught by a front surface of a socket body, allowing the locking springs to be inserted into an insertion slot in the socket body. When protrusions on the locking springs are inserted in recesses in the insertion slot, the support bars are urged by the coil spring to be inserted into the insertion slot, and the protrusions axially engage in the recesses, whereupon the plug and the socket are locked together. When the coupling sleeve is pulled back against the bias of the coil spring, the support bars are withdrawn out of the insertion slot to allow the plug to be pulled out of the socket.