Abstract: An anti-theft device that is adapted to be connected adjacent to or on a battery of a motor vehicle and including a power switch for disconnecting the battery from its standard battery cable when current flowing through the cable exceeds a preselected substantial amount of current associated with an attempt to start the vehicle. A lockout circuit is actuated by a remote transmitter for generating an external command signal to override the operation of the power switch. This device can be attached directly to a battery without external wiring and still provide the passive or self-arming anti-theft device.

Abstract: Improved circuitry applicable to an electrophotographic copier or similar image forming apparatus for controlling high voltages which are applied to various components of the apparatus such as corona dischargers. While the charge current of a photoconductive element is detected periodically, the output current of a high-tension power source which feeds a high voltage to a corona discharger is set on the basis of the detected charge current. When the charge current is set at a predetermined value, the output current of the high-tension power source is subjected to constant voltage control. Cleaning is performed only when the voltage is not at a reference value. A current feedback arrangement from the photoconductor uses two oppositely polarized half-wave rectifiers and a voltage doubler.

Abstract: In a d.c. solenoid in which a thermistor having a positive temperature coefficient is connected in series with a main coil, a subcoil is connected in parallel with the series connection of the main coil and the thermistor, so that a large magnetic force can be produced at the solenoid energization starting time, and generation of heat from the thermistor can be suppressed to prevent burn-out of the main coil due to continuous current supply. Both the main coil and the subcoil, when energized alone, are capable of actuating the solenoid. The d.c. solenoid is applied to a valve in a vaporized fuel absorption system.

Abstract: A lamp power control circuit for electric equipment which has a power supply, supplies power to incandescent lamps fitted to operating parts of electric equipment and is provided with a current-direction inverter unit. This current-direction inverter unit inverts the direction of the electric current flowing through an incandescent lamp in response to a signal generated in response to manual operation of the operating parts. Consequently the effect of electromigration on filaments of incandescent lamps is decreased and occurrence of the notching is reduced, thus extending the life of lamps.

Abstract: Overvoltage and component failure protection for redundant current-mode controlled power supplies operating in parallel takes a supply off line when the supply drives the output bus to an overvoltage condition, without removing properly functioning supplies from the bus. The supply is also taken off line when either the error amplifier or the PWM fails.

Abstract: An air ionizing cell has an elongated, hollow dielectic cylindrical body member, one end of which defines a greatly restricted orifice (relative to the inside diameter of the cylindrical body member). An elongated metallic electrode having an end tapered at a constant rate and terminating at a microscopically sharp point is disposed coaxially within the cylindrical body member. The point of the electrode is positioned concentrically within the orifice and an electrical potential is applied to the electrode without defining a corresponding ground within the cylindrical body member.

Abstract: A general purpose time delay weight activated switch is disclosed. A foam seat cushion contains wire mesh electrical switch closing contacts. Sitting or rising from the cushion opens and closes the switch. A solid state adjustable timer is also imbedded in the cushion, or adjacent to the cushion. Its purpose is to delay the opening of the switch several seconds. An ideal application for the device is to automaticlly lock an emergency brake in a delivery van. The driver leaving the parked vehicle automatically locks the parking brake or vehicle brakes when leaving the vehicle when the present invention is combined with a parking brake or vehicle brake locking means. The invention's delay circuit allows the driver to bounce up and down on a bumpy road without setting off the switch. Other uses for this special purpose seat cushion include railroad, farm equipment, industrial and power boat safety systems.

Abstract: A protection circuit against an excessive current in a flyback transformer which supplies a high voltage to a CRT. A fuse and current detecting resistor are inserted on the line which supplies a current to the primary winding of the flyback transformer. The intermediate point of the primary winding and the node of the fuse and current detecting resistor are connected by a semiconductor switching element which becomes conductive when the voltage across the current detecting resistor reaches a certain high voltage. Accordingly, if an excessive current flows in the flyback transformer, the thyristor turns on, causing the fuse to be blown by the large current, whereby the current supply to the flyback transformer can be shut off.

Abstract: A high power multiple pulse generator includes a plurality of transmission line sections, adjacent sections of which are coupled together by a saturable inductor. One transmission line section is switchably connected to a load impedance through an output switch. With the output switch open, the coupled transmission line sections are charged to a desired voltage potential. A burst of multiple pulses is generated by closing the output switch, causing the charge on the transmission line section connected to the load through the closed switch to be delivered to the load as a first pulse. This first pulse has an amplitude equal to one half of the charging potential and a duration that is a function of the length of the transmission line section. Once this first pulse is delivered to the load, a voltage is developed across the saturable inductor coupling the discharged transmission line section with an adjacent charged transmission line section, causing current to flow therethrough.

Abstract: A switching circuit is disclosed which provides a plurality of switches which can be caused to open or close, a controller which can selectively draw current from a plurality of power sources connected in electrical communication with the switches and isolating devices connecting the switches to the controller. The controller is connected to a regulator and to one voltage interconnection and the regulator is connected to another voltage interconnection by two conductive paths which control individual switches that are associated with individual power supplying loads.

Abstract: The present invention relates to an integrated outlet that allows supply of AC power to an outlet receptacle when certain conditions are satisfied. The integrated outlet contains separate modules to establish electrical connection with electrical conductors that transmit AC and DC power, telecommunications, control communications, and signals transmitted along a coaxial wire. In a preferred embodiment, these electrical conductors are disposed on two cables. Each module within the integrated outlet attaches to only certain standard conductors in each of the two cables. The integrated outlet can then be efficiently connected to the conductors in each of the two cables.

Abstract: A security system for motor vehicles enables the ignition switch to be turned to the "off" position and the key to be removed without turning off the engine and accessories. Normal driving operation is restored by reinserting the key, turning the ignition switch to the "on" position, and preparing the vehicle for driving. If a person without the ignition key attempts to drive the vehicle, the engine turns off. The security system includes a solenoid, a switch means to energize and deenergize the solenoid, an ignition bypass line and switch, and a starter-override switch which prevents the flow of current to the starter should the ignition switch be inadvertently turned past the "on" position to the"start" position.

Abstract: The brazing process consists in inserting between two pieces to be brazed on the one hand, a plaque or strip of refractory metal such as molybdenum, tantalum, hafnium, zirconium, niobium, tungsten or an alloy including at least one of these elements, and, on the other hand, a plaque or strip of copper, copper alloy, titanium, titanium alloy, nickel or nickel alloy, the contributing metal compound being then placed between the plaques or strips and the two pieces.

Abstract: A transport refrigeration system including a refrigerant compressor which is alternatively driven by an internal combustion engine or an electric induction motor. The transport refrigeration system achieves and maintains a predetermined set point temperature in a served space by heating and cooling cycles. When additional heat is required during a heating cycle while the internal combustion engine is driving the compressor, capacitors are connected across the induction motor, to cause the motor to function as an induction generator and build up an output voltage. The output voltage is monitored, and when it is sufficient to sustain a load, resistors located to aid the heating cycle are connected to receive the output voltage.

Abstract: A programmable power supply having a plurality of channels wherein each channel is adapted to output a selectable DC voltage, AC voltage, DC current or AC current. Each channel is adapted to select a DC reference signal or an AC reference signal and to scale the selected DC reference or the AC reference to output the selected signal. The outputted selected signals are monitored to provide a monitored channel signal indicating the value of the selected signal. The programmable power supply outputs monitored channel signals for each of the channels in a human perceivable format such as a display or printed format. At least some of the channels are adapted to be connectable to a temperature probe which outputs temperature signals and, in this embodiment, the temperature signals are monitored to provide monitored channel temperature signals, the monitored channel temperature signals being outputted in a human perceivable format such as a display or printed format or both.

Abstract: A protected reversing contactor is disclosed comprising two electromagnets intended to be alternately energized and whose armatures actuate two sets of respective phase switches and two acknowledgement switches mounted respectively in series in the supply circuit of the two coils of the two electromagnets. These two acknowledgement switches are actuated by a transmission system comprising two coaxial rotary shafts disposed end to end and each having an arm adapted to be driven in rotation, in one direction, by one of the electromagnets and a finger cooperating with the acknowledgement switch of the other electromagnet.

Abstract: A power connect safety and connection interlock system is shown for use with inverters and other DC loads (16) which include capacitor filter banks (14) at their DC inputs. A safety circuit (20) operates a spring (26) biased, solenoid (22) driven mechanical connection interference (24) which prevents mating and therefore electrical connection between the power contactor halves (11, 13) of the main power contacts (12) until the capacitor bank is safely precharged through auxiliary contacts (18). When the DC load (16) is shut down, the capacitor bank (14) is automatically discharged through a discharging power resistor (66) by a MOSFET transistor (60) through a discharging power resistor (66) only when both the main power contacts and auxiliary contacts are disconnected.

Abstract: A circuit for demagnetizing a mask in a color picture tube of a television receiver, in which a resistor with positive temperature coefficient is applied to the input alternating current when the receiver is turned on. A bridge rectifier is connected with one terminal, to a first pole of the alternating current source, via the demagnetizing coil that is mounted on the picture tube, and the resistor. The bridge rectifier has another terminal connected to a second pole of the alternating current source. A variable electronic switch interconnects the direct-current output terminals of the bridge rectifier. The variable electronic switch is controlled to continuously decrease current flowing through the demagnetizing coil to zero. For this purpose, a controlling voltage is obtained from a winding in a horizontal-frequency synchronized power-intake stage by flyback rectification.

Abstract: A high-frequency heating apparatus comprises an inverter including a semiconductor switch and a resonance capacitor, a boosting transformer for a supplying high-voltage power and heater to a magnetron an inductance device inserted in the heater circuit of the magnetron, and an inverter control unit for controlling the semiconductor switch. The inverter control unit is controlled by a start control at the start time of the inverter so that the conduction time of the semiconductor switch becomes shorter than that under a normal operating condition and the non-conduction time thereof becomes longer than that under a normal operating condition and so that the switching period of the semiconductor switch becomes substantially an integral multiple of a resonance period of the resonance circuit formed by the resonance capacitor, whereby the operating frequency of the inverter at the time of starting thereof becomes substantially equal to its normal operating frequency.

Abstract: A monostable circuit with device-status feedback control to an external timing terminal is used to controllably change the magnetization state of a ferrite phase shifter core. A pair of such bistable circuits with suitable feedback controls permits a single command pulse of controlled duration to controllably both reset a ferrite core to a saturated magnetic state and then subsequently set the core to a desired non-saturated magnetization state (corresponding to the time duration of the single command pulse). By addition of suitable steering circuits, the controlled resetting and setting of one or more pairs of such ferrite cores can also be achieved using the same single command pulse. The ability to both reset and set plural ferrite phase shifter cores with but a single command pulse of controlled duration permits considerable simplification of beam steering control wiring for a two-dimensional phased array of RF radiators (e.g., so as to provide electronic beam steering control).