Abstract: A signal conditioning circuit having an input stage that receives inputs from at least one pair of conductors and processes the input signal through an input filter and a buffer amplifier. Each input filter and buffer amplifier are powered by independent power sources whose power return reference potentials are independently determined by the potential of the corresponding input signal potential reference conductor. The outputs of the buffer amplifiers, the power return reference potentials, and the power return reference potential of the conditioning circuit output are all appropriately added or subtracted in an output stage. The output stage consists of an amplifier buffer having low output impedance which is powered by a separate independent power source whose power return reference potential is independently determined by the potential of the output signal reference conductor. The output of this circuit stage is connected to an output inductor circuit which in turn drives the output signal conductor.

Abstract: A current limiting circuit and technique is provided for preventing excessive current supplied to a circuit and for providing self-recovery characteristics thereto. The current limiting circuit includes an input for receiving a supply voltage for supplying power to the monitored circuit and an output for providing the power to the desired circuit being monitored. The circuit employs a drive transistor having a source connected to the input and a drain connected to the output. The drive transistor further includes a gate for receiving a control signal. A current mirror circuit is provided for sensing a current overload and adjusting the control signal to indicate the amount of current drawn. During normal current draw, the circuit provides the supply voltage as the output. When excessive current draw is detected, the drive transistor is turned off and the output current is thereby cut off. When the current decreases to normal current loads, the drive transistor is turned back on.

Abstract: An automotive seat switch assembly for controlling seat movement comprising a switch housing having front and back covers and a middle switch plate, where the middle switch plate has a plurality of conductors molded in and a plurality of conductor contact surfaces on its outer surface, and a plurality of switch actuator assemblies, where each actuator assembly comprises a contactor for electrically contacting a respective one of the contact surfaces, a contactor actuator slidably mounted to a rail for slidingly actuating the contactor, and a pari of spaced apart support posts extending from the housing upon which the rails are mounted, where the front cover encloses the switch actuator assemblies.

Abstract: A power distribution and control system for computer modules having minimal parts and volume for attachment to a computer cabinet frame which acts as a heatsink. The AC source is split into multiple (M) distribution channels, each of which is monitored by a control unit which operates a solid state relay which permits and/or cuts off line current in that channel. The control units are concatenated so that each current distribution channel operates through 3 through 5 AC cycles before the next succeeding distribution channel is activated. However, each control unit in the system can be individually programmed via external signals.

Abstract: The invention provides a wind-powered electricity generating system including a wind energy storage and recovery device. The wind energy storage and recovery device includes a wind-powered electricity generator (not necessarily a system of the invention), a heater operable with electricity from the generator, thermal fluid heated by the heater, a tank to store the heated fluid, and a stored heat energy extractor. In addition to the storage and recovery device, the system of the invention also includes blades mounted to rotate a shaft of a wind-powered generator in response to the wind to create electricity, and switch means actuable in response to the amount of electricity created by the generator for applying electricity to the heater. In another aspect the invention relates to a method for storing wind energy.

Abstract: A door operation control system has a door opening for moving a door between open and closed positions. A door operator control circuit selectively operates the drive means to move the door between the open and closed positions. An obstruction detection device detects whether there is an obstruction in the path of the door between the open and closed positions and generates a signal in response thereto. The obstruction detection device is connected to the control circuit by wiring to permit operation of the door opener in the absence of a signal from the obstruction detection device and to prevent certain operations of the door opener in the presence of a signal from the obstruction detection device. An error detection circuit detects faults or errors in the wiring and generates a signal to prevent certain operations of the door operator when the faults or errors are detected.

Abstract: A power source switch circuit can remember the last state a switch is in when main power is lost. A capacitor or battery is used to place the switch in its original position after the main power is restored.

Abstract: A current generator, particularly for vehicles, has a shaft, a liquid cooled generator, a liquid cooled internal combustion engine forming a drive motor for the generator, and a pump for supplying a liquid coolant. The generator, the internal combustion engine and the pump are arranged coaxially on the shaft. The pump for a liquid coolant is located on the shaft between the generator and the drive motor.

Abstract: A circuit analyzing system includes a current transformer for extracting current from a phase or neutral conductor of a three phase line, a filter connected to the output of the current transformer and functioning to substantially trap current at the fundamental frequency while substantially passing currents at various harmonic frequencies thereof, and signal processing circuitry connected to the output of the filter to perform various functions with the harmonic frequency current input thereto. Among these functions, as shown in various preferred embodiments, are measurement of the harmonic signal in RMS and conveyance of the output to a display instrument for a user or utility's convenience in monitoring harmonic frequency circuits, which have become more common with the advent of electronic equipment having internal power supplies such as personal computers, work stations, printers, and the like.

Abstract: In a grounding switch for an encased high-voltage switching system, the movable switching piece is moved by a rotating drive shaft. This drive shaft passes through the housing of the grounding switch. To design the contact elements that transfer the ground potential to the movable switching piece as simply as possible, the drive shaft consists of electrically conductive material. In addition, the drive shaft is insulated as it enters the housing. The drive shaft is also coupled with means to transfer the ground potential, e.g., a current strip, outside the housing. Thus, the drive shaft serves both to transfer force and to transfer potential. A switch blade is designed to be elastically deformable in part, and serves as the movable switching piece. This grounding switch for an encased, compressed-gas-insulated high-voltage switching system can also be used as an insulated grounding switch to carry out measurements.

Abstract: A switch unit receive an AC signal and includes first and second push-button switches and at least one rectifying diode. Each of the first and second push-button switches is a 2-stage switch or a 3-stage switch. The first and second push-button switches and the at least one rectifying diode are configured such that the switch unit selectively generates any one of a non-signal, a positive half-wave rectified signal, a negative half-wave rectified signal and a full wave alternating signal to each of first and second outputs. The first and second outputs of the switch units are transmitted to an output unit by way of two transmission wires, respectively. The output unit discriminates the switching state of the first and second push-button switches based on the signal received from the switch unit via the two transmission wires.

Abstract: A keyswitch assembly having a mechanism for controlling touch of a plurality of keys simultaneously, Each key is vertically movably supported on a holder member by a key support assembly. The key support assembly has first and second links intersecting with each other and pivotally connected together at the intersecting portion. A first end of the first link is pivotally connected to the key and a second end of the first link is slidably movable in a horizontal direction and is pivotally connected to the holder member. A first end of the second link is pivotally connected to the holder member, and a second end of the second link is slidably movable in the horizontal direction and pivotally connected to the key, A biasing segment is connected to the second end of the first link for urging the same. The biasing force of the biasing segment is controllable by moving an operation plate which is connected to the biasing segment.

Abstract: An integrated Marx generator circuit is constructed in one assembly from a housing with two oil-filled cavities. First and second capacitors each include two sets of spaced apart capacitor plates. The first and second capacitors are formed in the separate cavities. The space between the capacitor plates are filled with oil and insulating material. A set of four spark gap switches control the charging and discharging of the generator circuit.

Abstract: A layered tubing for use in a motor vehicle composed of a thick outer tubing having an inner and an outer face, the outer tubing made of an extrudable thermoplastic such as a polyamide like Nylon 12; a thin intermediate bonding layer bonded to the inner face of the thick outer layer, the bonding layer composed of an extrudable melt-processible thermoplastic capable of sufficiently permanent laminar adhesion with the thick outer layer which is chemically dissimilar to the thermoplastic employed in the thick outer layer; an interior layer bonded to the intermediate bonding layer, the interior layer composed of a fluoroplastic which is resistant to permeation by and interaction with short-chain aliphatic and aromatic compounds; and an innermost electrostatic discharge layer.

Abstract: An electromechanical pulse gereator having a purely mechanical mode of operation for microelectronic equipment, e.g. volume control in hearing aids, consisting of a housing formed by a fixed base portion in which a shaft is fixedly mounted and a timing wheel is rotatably mounted around the shaft, the timing wheel having the form of a downward facing open cylinder and being fixedly connected to a casing whci forms an external handle. The inner cylinder surface of the timing wheel is provided with grooves engaging with a protrusion of a circular carrier rotatably mounted around the shaft. A U-shaped contact spring has members which are individually imparted an oscillating movement between contact pairs A-B-C and A-D-E, respectively, by the turn of the timing wheel in one or the other direction via the carrier which can only move over a pre-determined circular section, so as to generate digital pulse trains.

Abstract: The invention relates to a novel high-speed actuated high-voltage RF switch for such purposes as the cold switching of short very high current RF pulses in applications such as solid-state Loran-C transmitters and the like, as for switching between coupling/output networks thereof. The switch comprises planar upper and lower unconnected pairs of longitudinally extending input and output bus strips electrically connectable by the transverse insertion of planar link strips slightly separated therefrom and the rapid compression thereof against the adjacent end portions of the unconnected input and output bus strips, enabling rapid switching absent wear of the contact surfaces, but with the provision of adequate spacing for high voltage operation and adequate contact pressure to eliminate current arcing.

Abstract: A power supply arrangement for a main unit of a portable, battery operated information processing apparatus including at least a microprocessor and a battery. The power supply arrangement comprising an expansion unit for the portable information processing apparatus for expanding the operation capability of the main unit of the information processing apparatus upon connection therewith. The expansion unit includes a power circuit for converting an a.c. voltage to a d.c. voltage, the power circuit enabling supply of power to the main unit when the expansion unit is connected with the main unit. Also, a connection arrangement is provided for the expansion unit and main unit.

Abstract: A solar venturi turbine includes an upwardly oriented venturi tube supported by a venturi support skirt. The venturi tube includes a tapered thermopane glass enclosure which allows sunlight to project therethrough and impinge on a tapered centrifugal fan fronting the thermopane enclosure and mounted within the venturi tube. The fan vanes are configured to spiral radially outwardly in a clockwise direction when viewing the fan in top plan. The fan vanes have a cross-sectional profile approximating an inverted L. Located above the centrifugal fan in the neck of the venturi tube is a high velocity fan. A high pressure compressor is mounted above the high velocity fan, and finally a turbine is mounted above the high pressure compressor. A venturi tube outlet flares outwardly directly above the turbine and is mounted to the venturi tube. The turbine is connected to a shaft to drive an electrical generator thereby producing electricity.

Abstract: In the case of a method and a device for triggering an electromagnetic consumer (1), which is connected in series to a switching means (2), the voltage applied to the switching means (2) is fed to a voltage comparison means (12) and compared there to the voltage of a reference voltage source (13). Dependent upon this voltage comparison, an output signal is produced at the output terminal of the voltage comparison means (12), which serves to switch over a suppressor device (4).

Abstract: For assembly substitution actions during ongoing operation of a bus system, effects can occur that lead to oxidation of connecting contacts, to the destruction of assembly components or to the disturbance of bus signals because of the transmission of electrical energy via the connecting contacts of plug-type connectors (SP1 . . . SPn) of the assemblies (BG1 . . . BGn) when inserting or removing an assembly. Since bus signals can also be disturbed when the supply voltage is disconnected before the assembly substitution action, the bus system is inhibited before an assembly substitution action. After the conclusion of the assembly substitution action, the assemblies affected by the assembly substitution action are selectively reinitialized.