Abstract: A mounting tab plate for a panelboard has been designed, so that two such plates can be used in pairs on each pole for gang-mounting of multipole circuit breakers, the plates being fixed on the panelboard on opposite sides by a screw after insertion of the tab in a corresponding groove of the housing of the circuit breaker.

Abstract: A hermetically sealed surface mount electronic component package can be manufactured by converting standard, readily available flat-packs. The package has a base, with an opening through which a primary transmission lead extends, a glass-to-metal seal surrounding the transmission lead in the opening, and a secondary transmission lead extends from the primary transmission lead so that it is spaced from the base and its end is at least flush with the bottom of the base. An insulator can be provided between the primary transmission lead and the secondary transmission lead. A method of converting a standard flat-pack by providing a composite piece having a dielectric insulator, a secondary transmission lead for connection to the transmission lead of the flat-pack, and a connecting member for connecting the insulator and secondary transmission lead to the base of the flat-pack is also described.

Abstract: A generic chip carrier is described which includes, as integral parts, a voltage bus and a plurality of terminating resistors connected between the voltage bus and signal traces on the carrier. The voltage bus wraps around the chip carrier, thus providing a large area of metal. Through the selective use of the terminating resistors, the generic carrier can be customized for a particular type of integrated circuit, i.e., source or destination termination of signals. A signal trace may be customized by "operating" the terminating resistor with a current spike applied by a standard electrical probe. Spare bonding pads and terminating resistors are placed at intervals about the periphery of the carrier as insurance against defective or mistakenly removed terminating resistors.

Abstract: An electromagnetic shielding spring gasket assembly includes a coil spring for blocking the propagation of electromagnetic waves therepast. The coil spring includes a plurality of coils having a major and a minor axis and canted along a center line defined by an intersection of the major and minor axes and may be interconnected in a manner forming a radial garter-type canted-coil spring. A back angle of each coil defines the disposition of a trailing portion of each coil with respect to a line normal to the center line which determines a radial load-deflection characteristic of the canted-coil spring assembly. A front angle of each coil defines the disposition of a leading portion of each coil with respect to the normal line. The plurality of coils are noninvasively supported in an orientation for controlling the blocking of electromagnetic waves, for radial loading of the radial garter-type canted-coil spring and for controlling the resilient characteristics of the radial garter-type canted-coil spring.

Abstract: A superconductive conductor (1) is formed by at least three superconducting wires (3) comprising oxide superconductor members (4) and stabilizing members (5), which are point-symmetrically arranged in section. The superconducting wires (3) are so point-symmetrically arranged that electromagnetic force and magnetic fields provided by the respective superconducting wires (3) cancel each other, whereby it is possible to reduce distortion and influence by applied magnetic fields.

Abstract: A shielding gasket is provided, comprising a conductive or non-conductive resilient core, the surface of which is rendered electrically conductive by flocking with conductive fibers. The gasket is inexpensive, lightweight and allows a low closure force. The invention further provides a method of rendering selected areas of the surface of a core conductive by selectively flocking with conductive fibers.

Abstract: An improved electrical panel assembly of the type providing a plurality of receptacles for use with cable connectors and requiring that the connectors must be connected with their respective receptacles in a given order and disconnected therefrom in the reverse of that order. The panel assembly comprises a planar panel element having an opening therein for each receptacle and a receptacle mounting housing element behind each panel opening, constituting an integral, one-piece molding. Each panel opening is provided with a cover swingable between a closed position and an open position. The connectors and receptacles are of the known type having single contacts which lock together when the connector is mated with the receptacle and rotated a partial revolution. Polarizing devices are provided in association with each receptacle and each cable connector.

Abstract: An enclosure for an electrical distribution unit which includes a transformer provides for a semi-buried positioning of the transformer to allow easy access to electrical conductors of a power source. The enclosure includes a housing unit and an underground vault within which at least part of the housing unit is positioned. The housing unit extends partly above the ground, so as to allow easy access to connections for the distribution unit from the ground level. An inclined front wall of the housing unit facilitates such connections. A hingedly attached cover closes a part of the inclined front wall of the housing unit above the ground and prevents adverse effects of the environment on the electrical distribution unit positioned within the housing unit.

Abstract: A housing designed to contain a logic circuit (15) comprising two shells (11a, 11b) each including a welding area (17a, 17b) having an appropriate geometry permitting ultrasonic welding, such that when both shells are assembled before a welding phase, they are shifted along a vertical axis (20). The supporting plate (13) comprises a mounting ear (23) while the shells comprise a receptacle (33a, 33b). During the welding phase, there is no concomitant contact between any of the upper face (26) and lower face (27) of the ear (23) and the corresponding bearing faces (34a, 34b) of the receptacles, owing to a shift (21). The shift is reduced and the concomitant contact takes place between the bearing faces (34a, 34b) of the receptacles and each of the upper and lower faces (26, 27) of the ear (23) only when the welding phase is completed.

Abstract: A shield blocks passage of electromagnetic energy through a seam of indefinite length between conductive elements and is adhesively attached to at least one of the elements. A preferably non-conductive adhesive is disposed on a conductive surface of a seal in a discontinuous pattern along the length of the seam, defining area of 5-40% adhesive for physically attaching the conductive surface, separated by 60-95% exposed areas for direct electrical contact. The seal can include a compressible body or can be defined by a conductive sheet, for example a fabric provided with a plating or other conductive coating. The areas of adhesive preferably define longitudinally non-overlapping inclined lines extending laterally across the seam. A release liner can removably attach to the adhesive. In a preferred embodiment the conductive surface is the surface of a compressible seal body, such as a conductive sheath on a compressible core.

Abstract: For purposes of protecting electrical installations in airplanes against electromagnetic disturbances and especially against overvoltages as can occur for instance as a consequence of a lightning strike, the electrical lines between the individual electrical devices are laid in flexible profiled tubes consisting of electrically conducting material and are rotatably connected with junction elements arranged on one side. At the same time the tubes are connected by means of these junction elements to charge dissipation points provided at the electrical devices. The lines laid in this manner are arranged in overbraiding of plastic material by way of chafing protection. In another embodiment, the chafing protection is provided by a plastic layer on the inside of the profiled tube. In still another embodiment, the chafing protection is itself a hose fabricated of fiber material.

Abstract: For purposes of protecting electrical installations against electromagnetic disturbances, especially overvoltages, for instance, as a consequence of lightning strikes, wiring lines laid for connecting individual electrical apparatus are surrounded by a shielding, which is formed by a braiding, consisting of electrically conducting material and which is in connection with connector elements arranged at its ends. The connector elements, as well as an additionally provided terminal, branching and attachment elements, comprise, respectively, a transitional part over which the braiding is pulled and on which it is fastened by means of a clamping element. In addition, further sheaths of a plastic braiding are provided between the electrical shielding and the electrical lines.

Abstract: A thermostat guard including a ventilation scheme that allows air flow to the thermostat, while preventing the insertion of tools through ventilation holes to adjust the thermostat. The thermostat guard provides a locked enclosure for a thermostat so as to prevent unauthorized adjustments.

Abstract: A sealable hermetic microchip package includes a vent therein that permits gas to escape during the sealing operation, but then itself is sealed at the completion of the sealing operation to render the package hermetic. The venting of gas from the interior of the package avoids the buildup of internal pressure during the sealing operation that can introduce bubbles and other faults into the sealing material. The vent may be a channel in the sealing surface of the lid of the package that is initially open, and then fills with the seal material as it flows to effect the seal. The vent may also be a hole in the lid that is sealed by the flow of a bead of the seal material. An equivalent approach to venting provided that the lid be mounted on standoffs that flow during sealing to permit the lid to settle onto the base of the package.

Abstract: An insulation cover attached to a shield case such that the cover substantially seals the open side of the shield case without extending beyond the edge of the shield case. The cover plate is connected to the shield case by means of a series of notches and protuberances formed along the edge of the cover plate which match with holes formed in the legs of the shield case. When the cover is attached to the shield case, the circuitry inside the shield case is protected from both contaminants during installation and short circuits when installed on a mother board.

Abstract: Method of mounting a printed circuit board and securing the earthing to a casing. The method includes providing the printed circuit board with projecting parts and an earthing connection on at least one face, providing the casing with corresponding recesses, mounting the printed circuit board so that the projecting parts fit into the recesses to support the board, attaching a flexible sealing strip of electrically conducting material, and placing a lid on the sealing strip, whereby the earthing connection contacts the casing and the sealing strip, securing the earthing connection.