Abstract: A contactless proximity switch and mounting arrangement for determining the position of a movable member within a cylinder which has two end covers secured on the cylinder by means of a plurality of tie rods, includes a switch housing which secures to one of the tie rods. A contact opening formed in the switch housing has disposed therein, a switch having a pair of contacts and a permanent magnet disposed in a fixed manner. One pole of the permanent magnet is connected to a first contact, while the second pole is disposed in a contacting relation to the cylinder. A second contact is electrically coupled to the cylinder at a position a predetermined distance from where the second pole is disposed. As the movable member, which is constructed of a ferromagnetic material, nears the switch housing, the air gap between the second contact and second pole is bridged and the contacts close indicating the proximity of the movable member to the switch element.

Abstract: A low-voltage circuit breaker of compact design has a housing of insulating material with several parallel disposed chambers. A switching mechanism designed as a structural unit is provided in one of the chambers. The other chambers comprise compartments for switching path contacts. The switching mechanism comprises a U-shaped carrier for all moving parts. In particular, a drive shaft with a coupling part, such as a key, as well as a tripping shaft, likewise having a coupling part such as a slot, are provided. A pole control shaft is provided for actuating the switch contacts and is provided at its end with a coupling part such as a slot which comes into engagement with the coupling part of the drive shaft of the switching mechanism if the latter is built into the switch gear.

Abstract: Dissipation of heat from a socketed leadless electronic chip-carrier package is promoted by a heat-conducting metal socket cap distinctively overlying and guiding heat away from the socketed package fully along a broad planar surface area, the socket cap being of a unitary construction which both mechanically holds the package securely mated with a multi-pin socket and also cools the package by way of an integrated array of heat-radiating elements; edge clasping of the cap with a chip-carrying socket avoids interference with needed conduction of heat away from central areas of the package and cap.

Abstract: An input device of the tablet type comprising opposed planar resistance bodies with a plurality of dot spacers interposed therebetween, plate-like insulating bodies made of soft and elastic material and provided respectively and integrally on the outsides of the planar resistance bodies, and a fixed plate for securing and supporting one of the plate-like insulating bodies, and characterized in that a plurality of cavities are formed in an abutment area between the one plate-like insulating body and the fixed plate by which each dot spacer portion can sink when a force is applied, whereby entry of information relating to the dot spacer portion also is allowed.

Abstract: An AC motor control panel includes a short bar substrate (10) which is placed on a connection terminal (14) of an electronic component of an inverter control circuit arranged in a housing. A tubular connection member (17) is inserted into a hole (10b) provided in the short bar substrate 10. A screw (13) is inserted into holes provided in the tubular connected member (17), short bar (15) and connection terminal (14), and the end of the screw (13) is screwed into a nut (18) provided on a lower portion of the connection terminal (14). The connection terminal (14), short bar (15) and tubular connection member (7) are thus electrically interconnected.

Abstract: Disclosed is a gas-insulated switchgear in which three circuit breakers are arranged in tandem between a pair of main bus bars spaced apart by a predetermined distance. The connection between the three circuit breakers is such that adjacent circuit breakers are connected by a connecting bus bar to their lead-out parts remoter from each other, and disconnecting switches, etc. are disposed on the connecting bus bars. This arrangement shortens the distance between the adjacent circuit breakers, so that the gas-insulated switchgear can be shortened in the length in the tandem direction of the circuit breakers.

Abstract: A position switch is set forth which is adapted to generate a signal whenever two masses, such as a vehicle sprung and unsprung mass, are at or nearer than a desired spacing. The switch includes a grounded, conical, coiled spring attached to one mass, and an electrically charged plate secured to the other mass. The spring has a relaxed length to lie adjacent the plate when the masses are at the desired spacing. When the masses are brought together the spring contacts the plate, is compressed, and the plate is grounded generating a current signal indicating that the masses are at or nearer than the desired spacing.

Abstract: A contact array assembly for use with a computer-controlled printed circuit oard testing apparatus includes an array of contacts into segments individually and releasably supported by supporting rods resting in a base plate. The space so created is utilized for accommodating the electronic circuitry components associated with these contact array segments and connected through plug-type connectors to a two-dimensional addressing and control logic on the base plate. These constructional units, referred to as modules or driver plates, are identical and may replace each other in any of the positions on the base plate. The invention results in a printed circuit board testing apparatus which may be designed for a very large number of contacts, but can be operated initially with a reduced amount of electronic circuitry and may be expanded later on, as desired.

Abstract: An air cooling assembly in an electronic system enclosure having an upper wire rack and a lower wire rack. A plurality of logic module cassettes are located between the upper and lower wire racks and are provided with openings so that cooling air drawn through parallel rods in the wire racks pass through the logic module cassettes. An intake plenum is located under the lower wire rack, and an exhaust plenum is located over the upper wire rack. A fan is located in the exhaust plenum for drawing cooling air through the logic module cassettes.

Abstract: A switch assembly integrally formed with a terminal connection board for selectively engaging and disengaging contacts connected to electrical machinery such as the windings for a dynamoelectric machine, the switch assembly including opposed contacts shaped and movable relative each other to provide rolling wipe-action contact wear, one of the contacts being mounted on a flat conductive member having an arm portion extending laterally to one side thereof which is engaged by and is actuable by a switch arm mounted on the terminal board.

Abstract: A relative translation of a first cam with respect to an electrical switch is established between first and second relative positions, whereby the electrical switch is established in a selected one of first and second states. A second cam has first and second detent positions respectively corresponding to the first and second relative positions. A pivot pivotally mounts the second cam, and a pneumatic impulse is generated for establishing the relative translation of the first cam with respect to the electrical switch. A fixed cam follower engages the second cam, whereby, in response to the impulses, the relative translation is established, a relative movement is established between the second cam and the fixed cam follower, the second cam effects a pivotal movement about the pivot, and the second cam is detained by the cam follower in one of the detent positions. Thus successive ones of the impulses control movement of the electrical switch alternately between the first and second states.

Abstract: A protector block for connecting plural individual telephone subscriber circuits adapted to replace existing nonstandard installations to enable usage of standard protector modules is disclosed.

Abstract: A pressure responsive control device having a pressure housing assembly defining a pressure chamber, an actuable controller fixed to the housing assembly and, a pressure transducer hermetically closing the pressure chamber. The transducer includes plural duplicate snap acting pressure responsive diaphragms, a diaphragm control plate hermetically bonded to the diaphragms and a support member hermetically joined between the control plate and the housing assembly. The diaphragms each are formed from thin sheets of spring metal and includes a central dome section having a surface finish less than 6 microinches A.A. on both sides. The diaphragms are nested together so that confronting faces of the dished sections are engaged when the diaphragms flex.

Abstract: A heat transfer and mounting device having a cross-bar member and at least one leg member. A fastener receptacle is positioned in the cross-bar member for a fastener to affix a heat generating device to the surface of the cross-bar member opposite the at least one leg member. Another fastener receptacle is positioned in the cross-bar member for receiving a fastener to affix a circuit board to the surface of the cross-bar member from which the leg member projects. An additional fastener opening is positioned through the cross-bar member and the leg member for receiving a fastener for attaching the heat conducting body to a heat sink.

Abstract: A single phase induction motor starting and automatic reversing switch has two pairs of springy vertically spaced apart switch blades supported in opposed cantilever fashion on an insulating base. Each pair consists of an upper blade and a lower blade. A nominally stationary contact is mounted in spaced relation above each upper blade and below each lower blade. Opposite ends of the motor starting winding are connected in common between the upper and lower stationary contacts. A shaft of insulating material with a lever at one end operates the switch. The shaft extends between the vertically spaced apart blade pairs and has axially displaced oppositely radially extending arms, one between one pair of blades and the other between the other set of blades. Turning the operator shaft in a first direction causes one arm to press a blade against one upper stationary contact and the other arm to press a blade against one lower contact.

Abstract: A holding device for mounting an electronic component on a printed circuit board, is made up of an elastic plate member formed into a shape having a generally U-shaped cross section to provide a channel for receiving said electronic component therein. Thus the elastic plate member includes a pair of side plate portions for holding the electronic component therebetween. Each of the side plate portions is provided with a slot for receiving a part of a flange formed on a casing of the electronic component and a lug which is to be bound into the printed circuit board by a soldering process. By the use of this holding device, an electronic component which usually requires manual work is mounted on the pc board by an automatic soldering process.

Abstract: The present invention teaches a lockable lampholder mounting system wherein a housing containing electrical contacts, such as an electrical wiring device of the type exemplified by an incandescent lampholder or socket, is removably mounted upon a preselected panel by means of a novel clip arrangement. The panel is of the type utilized in a fixture, for example. The clip arrangement includes a resilient clip of predetermined shape formed with at least three bearing surfaces for contacting the panel, and preferably a fourth bearing surface against which a locking tab is biased to prevent rotation and relatively upward movement of the wiring device.

Abstract: A contact member having one end contacting an electrode of a battery and other end connected to a grounding line disposed on a printed circuit board and a contact portion formed integrally with the contact member and having one end contacting a noise shield plate are disposed in an electronic apparatus having a battery as an electrical power source. This arrangement provides a good electrical shield against noise, and eliminates components such as a lead wire soldered to a grounding line disposed on the printed circuit board, permitting a large reduction in the number of assembly steps, and a reduction of component costs.

Abstract: A mat switch of high sensitivity including outer sheets which may be relatively stiff for wear resistance, an intermediate open work spacer sheet, conductive sheets interposed between the outer sheets on opposite sides of the spacer sheet for contacting on flexure through the space sheet, and a compressible deflection sheet interposed between one conductive sheet and the adjacent outer sheet, the deflection sheet being resiliently compressible for protrusion through the spacer sheet to contact the conductor sheets upon movement of the outer sheets in parallelism toward each other.

Abstract: An integrated circuit chip is mounted to an etched circuit board using a flexible, sheet-form interconnect member that comprises dielectric material and runs of electrically conductive material each run extending between a contact pad that is exposed at a first main face of the interconnect member and a termination point that is exposed at a second main face of the interconnect member. The interconnect face of the chip and the second main face of the interconnect member are placed in mutually confronting relationship, and the chip is attached to the second main face of the interconnect member by way of its interconnect face, whereby electrically conductive contact is established between the contact pads of the chip and corresponding termination points of the interconnect member. The chip is attached by way of its back face to a thermally conductive plate that has, at one main face, pressure pads that at least partially surround a chip receiving area of the plate.