Abstract: An improved computer chassis having a backplane with ground pads thereon for contacting fingers formed in channels in the chassis. The backplane is secured in the chassis without the use of screws. The fingers are defined within channels formed by a structure at the rear of a disk drive cage. The computer system further includes a plurality of disk drives mounted on trays which have rear pins that engage guide apertures formed in the backplane. The backplane is inserted within the channels and held therein by a pair of levers on outer corners which engage with catch members on the computer chassis. The engagement between the levers and the catch members ensures the backplane will remain in position during assembly and shipping. The backplane includes ground pads connected to a ground plane within the backplane. The ground pads engage the fingers on the channels to provide a secure electrical interconnection between the chassis and the backplane.

Abstract: An interface card mounting structure for computers or electronic apparatus includes a card mounting seat, a ground plate and multiple interface cards adapted for use with interface cards or expansion card such as VGA cards, IDE cards, sound cards, etc. The ground plate is fitted onto the card mounting seat before the cards are inserted to ensure tight contact between the cards and the ground plate, to prevent ground damage and to protect the equipment.

Abstract: An electronic component assembly including a connector hole built as part of an enclosure serving as a cabinet of electronic device, where the connector hole is used for passing through an electric connector connecting a component inside the cabinet to an external device installed outside the cabinet, has a knurled portion with a plurality of dents provided around the inside of the hole for preventing the connector from rotating by engaging the corners of the flange in the connector with any of the dents. As a result, other parts, including a rear terminal assembly for preventing the connector from rotating, and the number of the assembly operations can be eliminated. The cost and processes of molding other parts can also be eliminated.

Abstract: Computers are manufactured with connectors in which are inserted at least one PCI expansion card to increase the capacity of the computer. A computer enclosure panel is formed with an opening for insertion and withdrawal of the card. The card has a cover which blocks the opening after the card has been plugged in. The invention provides a retainer clip mounted on the rear panel which, when in operative position, attaches to the panel and engages the cover to assist in holding the card in place. The clip has a bent spring which may be compressed to install and remove the clip. The invention further provides room for the tab conventionally extending outward of the card to extend outward of the enclosure so that the card may be located closer to the side panel, thereby conserving space within the enclosure. Computers as shipped from the factory many times are not provided with PCI cards and the opening in the panel is blocked by a removable blanking cover. The clip also holds the blanking cover in position.

Abstract: A variable capacitor for a high frequency circuit of an electrical appliance includes a chip capacitor mounted on a multilayer circuit board and interdigital capacitors formed at inner layers of the circuit board. A wiring pattern for soldering the chip capacitor is connected with the interdigital capacitors via through holes formed in the circuit board. Capacitance select portions are cut so that the capacitance best-suited to the circuit is obtained. The through holes connected to the interdigital capacitors of the inner layer are selectively disconnected from the wiring pattern for soldering the chip capacitor, thereby obtaining a variable capacitor capable of absorbing fluctuations of the circuit for selecting the best-suited capacitance.

Abstract: There is proposed an electrolytic solution having a low specific resistance, a high sparking voltage and a stable sparking property. This electrolytic solution contains a quaternary ammonium salt of cyanic acid, at least one phosphorus compound selected from an organic phosphorus acid compound, phosphoric acid and salts thereof, water and an organic solvent.

Abstract: A metallized film suited for constituting a capacitor is disclosed. The metallized film according to the present invention includes a polymer base film and a vapor-deposited layer consisting essentially of Al and Zn, which is formed on the polymer base film. The Al content in the vapor-deposited layer is continuously varied along the direction of thickness thereof such that the Al content satisfies the equation of:a.sub.2 <a.sub.3 <a.sub.1wherein a.sub.1 represents Al content in terms of percent by weight based on the total weight of Al and Zn in the interface of the vapor-deposited layer and the polymer base layer; a.sub.2 represents Al content in terms of percent by weight based on the total weight of Al and Zn at the center in the direction of thickness of the vapor-deposited layer; and a.sub.3 represents Al content in terms of percent by weight based on the total weight of Al and Zn in the outer surface of the vapor-deposited layer.

Abstract: A compact housing for a workstation-class computer is disclosed. The apparatus includes a structural heat sink with a horizontal base heat sink that includes an interchangeable power source housing and a hard disk drive receptacle. The horizontal base heat sink operates to conduct heat away from the functional elements positioned within the interchangeable power source housing and the hard disk drive receptacle. The structural heat sink also includes a vertical tower heat sink to support functional elements including a power converter. The vertical tower heat sink operates to conduct heat away from the functional elements. The vertical tower heat sink also includes support devices for receiving a detachable pivot display system. The structural heat sink is surrounded by a vented exterior skin that facilitates convective heat transfer from the structural heat sink.

Abstract: A capacitor for the magnetron of a microwave oven is disclosed, in which the structure is relatively simple, so that the material cost would be saved, and that the productivity would be improved. An elliptic opening is formed on a side wall of a shielding case for installing a capacitor. The circumference of the opening is bent to form a projected portion for attaching a capacitor, and a recess is formed on the reverse side of the projected portion. An insulation resin case is formed on the projected portion so as to surround the capacitor by a molding process using an epoxy resin. An insulation cylinder with an upper portion inserted in the recess also can be molded simultaneously with the insulation resin case. Since in replacement of an insulating case and/or insulating cylinder of a conventional capacitor, an insulation resin structure is formed by a molding process, the number of elements is reduced and the assembling process for attaching these elements is eliminated to thereby improve the productivity.

Abstract: First and second shielding portions (110, 112) formed of electroless plated plastic enclose a radio frequency (RF) board (108). Bosses (148) extend from inner surfaces (130, 142) of the first and second shielding portions (110, 112) to make contact with compressible ground clip members (126) located on the RF board (108).

Abstract: The disclosed invention relates to a computer system, including a crib device and chassis for installing and removing a hard drive to and from the chassis of the system. The drive is securable to the crib device, which has a handle that allows the drive to be carried to and away from the chassis. The crib device and chassis have cams and cam engaging surfaces that cause the crib device and drive to move to effect engagement and disengagement of the electrical connectors of the computer system and drive. Also disclosed is a mounting arrangement for a floppy disk drive and CD-ROM drive.

Abstract: A capacitive absolute pressure sensor. The sensor includes a substrate having an electrode deposited thereon and a diaphragm assembly disposed on the substrate. As pressure increases, the diaphragm deflects, touches the electrode (in the touch mode), and changes the capacitance of the sensor. The changed capacitance is sensed to thus sense pressure changes. A buried feedthrough is used to sense the change in a capacitance in a chamber under the diaphragm and thus determine the pressure sensed. A vacuum in the chamber is maintained by proper selection of a thickness of a sensing electrode and an insulating layer, exposition thereof to a thermal cycle, and the hermetic bonding of the diaphragm assembly to the substrate.

Abstract: In a solid electrolyte capacitor in which the solid electrolyte is polyaniline or a polymer of an aniline derivative doped with a prototnic acid, a disulfonic acid represented by the general formula (1) is used as the protonic acid to enhance high-temperature endurance and humidity resistance of the solid electrolyte: ##STR1## where R is m-phenylene, p-phenylene or a C.sub.7 to C.sub.10 bridged cycloalkylene group, and n and m are independently integers from 1 to 3. Disulfonic acids of the general formula (1) are novel compounds.

Abstract: A technique for decreasing the effective gain of a bipolar phototransistor at high light levels makes the image usable over a greatly extended range of illumination conditions. The effective current gain at high light levels is reduced by fabricating a "non-ideal" emitter, such as by inserting a thin 20 521 tunnel oxide between the emitter and base junction. The tunnel oxide between the emitter and base serves as a variable resistor as well as a good junction for carrier injection from the emitter. The total base voltage is the sum of the oxide voltage and the intrinsic base voltage. At high image intensity, the bipolar phototransistor will gradually enter into the saturation mode, i.e., the base to collector junction is forward biased. The beta is thus reduced. The bias of the collector should be about 0.3-0.8 V higher than the emitter at the 20.ANG. tunnel oxide thickness for optimum operation.

Abstract: A hard-disk drive tray assembly includes an adapter, a tray, and a bezel. The adapter and tray are designed with slots and protrusions such that the adapter can be secured to the tray without the use of tools, screws, or nuts. The bezel pivots horizontally about the tray and comprises at least one incorporated inserter/extractor lever thereby allowing a user to insert and extract the hard-disk drive tray assembly using just one hand. The bezel has a built-in handle which allows a user to securely grasp onto the hard-disk drive tray assembly during transportation from one location to another. Furthermore, the bezel comprises a translucent or transparent LED display window for providing an external means of visually monitoring the typical LED status indication light which is integral to the hard-disk drive without having to run additional wiring from the hard-disk drive to an externally mounted LED light.

Abstract: An enclosure for an electrical apparatus includes a housing having top and bottom surfaces and a plurality of side surfaces, and an electrical apparatus, such as a pen-based computer, disposed within the housing such that the housing and the apparatus present a user interface region proximate to the top surface. A cover coupled to the housing by a compound hinge can be moved between a closed position substantially overlaying the user interface region and an open position substantially overlaying a portion of the bottom surface of the housing. The cover protects the user interface region when in the closed position and exposes the user interface region for use when in the open position. A cover catch member coupled to the cover engages a top-surface housing catch member when the cover is in the closed position, and the cover catch member engages a bottom-surface housing catch member at the open position.

Abstract: The invention relates to an apparatus which enables, via an elementary manipulation, protection against access to and destruction of data contained in a computer system or deactivation of such protection. The protected computer system may include a housing of a central processing unit (CPU) with its memories, the housing being separate from data access devices. The CPU and memories are connected to the data access devices by connectors which are external to the housing. The housing is defined by an enclosure (18) provided with at least one door or the like. Advantageously a plurality of housings may be defined in the enclosure, each of which housings can benefit from the inventive apparatus. Closing of the door causes a multipolar switch (28) to open, which switch is electrically connected between:links connected to the data access devices located outside the housing;connectors of/from the housing which connectors are to be protected.

Abstract: A portable PC combination or attache case for carrying a PC and a printer and when placed on a planar surface is positioned so that one side edge of each is along a common hinged side and when the case is in the open position in front of the user, the PC and the printer are ready for use, with their front edges toward the user. The PC, equipped with an opening cover containing a conventional screen faces a user in the open condition of the cover, and the printer are both firmly attached to a bottom section and a cover section, respectively. Inside the case a spiral spring containing cables connecting the PC and the printer and overlie the hinge connection.

Abstract: An external storage device includes an external storage device main and an external storage device unit. The external storage device main includes a thin type external storage device module formed into a one-side sealed package and having a storage medium series element containing at least one non-volatile semiconductor memory device, and a flat type external connection terminal connected to an input/output terminal of the storage medium series element and led and exposed to a backside of the external storage device module. The external storage device unit includes an external storage device main detachable section for engaging, insertedly attaching and detaching the external storage device main, a resilient contact electrically connecting to the external connection terminal of the external storage device main to be mounted, and at least a part of circuit function for driving and controlling the storage medium series element.

Abstract: An electronic apparatus includes a main body and a front panel. A hinge rotatably connects the front panel to the main body. A socket is connected to the front panel. A hemispherical member is connected to a display. The hemispherical member is rotatably received by the socket. The hemispherical member is pressed against the socket. A holder has a recess in which at least a portion of the display is disposed. A first shaft projects upward from a center of an upper portion of the display. A second shaft projects downward from a center of a lower portion of the display. The holder has a first groove into which the first shaft extends. The holder has a second groove into which the second shaft extends. The first and second shafts are movable in the first and second grooves.