Abstract: This electric power supply system includes an air conditioner serving as load, a solar photovoltaic cell for supplying power to the air conditioner, and a system power control circuit and further including a commercial power source for use in combination with the solar photovoltaic cell for supplying additional power when insufficient, power is supplied from the solar photovoltaic cell to the air conditioner. In an operation state of the air conditioner, the system power control circuit operates to regulate an operating point of the solar photovoltaic cell and variably regulate the supplied power from the solar photovoltaic cell while comparing required power of the air conditioner with the supplied power from the solar photovoltaic cell.

Abstract: An improved temperature control system for a power conversion circuit having two or more power converters operating in parallel and providing output power to a single load. The temperature control system maintains the temperature of each of these power converters at approximately the average temperature of the power converters. A detector coupled to each power converter detects the temperature of the power converter and generates a measurement signal that is a function thereof. A reference signal is generated that is a function of each measurement signal. A control circuit responsive to the measurement signal of each power converter adjusts the output power of that respective converter as a function of the difference between that converter's measurement signal and the reference signal such that the temperature of each power converter approximates the average of temperature of the power converters.

Abstract: A transition time converter for a pulse having steep slopes includes a coil in a series path between an input terminal and an output terminal, as well as a capacitor and a resistor in a shunt path between an input terminal and a reference potential. This transition time converter provides considerably improved reflection characteristics, as compared to prior art transition time converters, while substantially reducing the slopes of the pulses supplied to a load. The coil, capacitor and resistor have values such that the impedance seen by the source looking into the converter is ##EQU1## where R.sub.Z is the output resistance of the source, L is the inductance of the coil and C is the capacitance of the capacitor.

Abstract: The invention is directed to a domestic appliance for processing foods, with a basic device (1) accommodating an electric switch (6) and an electric motor (5), as well as electrical connecting means (4) for connection to an electrical power supply. The basic device (1) includes an electric accumulator (7) for operation independently of the line.

Abstract: A pressure activated switch is positioned for actuation of a horn in the steering wheel of a motor vehicle. The switch is mounted on an airbag cover and generates a signal when the switch is activated by the deflection of the cover. A temperature sensing device is positioned on the cover for generating a signal indicative of the cover temperature. The temperature signal is utilized for changing the actuation pressure or deflection required on the pressure or deflection activated switch to compensate for changes in cover stiffness due to the temperature changes of the cover. The invention is thus directed to providing a consistent horn actuation force regardless of the temperature of the airbag cover to which such force is applied to actuate the horn of the motor vehicle.

Abstract: A pair of electronic devices connected through a communication cable serve as a sending device and a receiving device, respectively. The electronic device on the sending device includes a generator for generating a control signal. The control signal operates to turn on a power supply of the electronic device on the receiving side when the power supply of the electronic device on the sending side is turned on or to turn off the electronic device on the receiving side when the electronic device on the sending side is turned off. The control unit is included in the electronic device on the receiving side. In response to the control signal given from the generator, the control unit operates the power supply of the electronic device on the receiving side.

Abstract: An electric circuit substrate apparatus having a micro-processor for a control of a device is comprised of a substrate, an electric circuit arranged on the substrate and including a rectifier, an electrolysis condenser, a detecting device for detecting the voltage of a current outputted from the electrolysis condenser and the micro-processor which is set to stop the control of the device upon receipt of a signal from the detecting device, and an enclosing device for immersing therein the substrate and the electric circuit, except for a portion of electrolysis condenser, in order that the immersed elements are interrupted from the ambient air.

Abstract: A lightweight passive magnetic shielding system for a mobile magnetic resonance imaging (MRI) superconducting magnet is provided to enable transportation of the MRI while at superconducting operation within the regulations limiting the strength of the stray magnetic field of the MRI magnet and the weight of the vehicle including the MRI system.

Abstract: A UPS having a ferroresonant transformer is selectively switched from AC line voltage to an inverter by a control method and apparatus using fuzzy logic to select an optimum switching point. The control apparatus and method senses output load current, output voltage and input voltage. Output current is used to calculate output load as a percentage of full load. First membership functions relating to percent load, second membership functions relating to output voltage, third membership functions relating to input voltage switching points, and rules using percent load membership and output voltage membership as antecedents and values of input voltage switching points as consquents as determined by regulation characteristics of the ferroresonant transformer, are used to execute a fuzzy inference and generate dynamic input voltage switching points for comparison with line input voltage to control switching of the UPS between line and inverter sources.

Abstract: The invention relates to a supply system, with uninterrupted distributed storage, for sensitive operation systems supplied from the public electric energy distribution network (10) or an emergency power supply (11) producing an equivalent voltage, said system incorporating at least one short term energy reserve supply circuit (30) associated with each supplied system and a medium term energy reserve supply circuit (31) having a reaction delay below the autonomy delay of the short term energy reserve supply circuit.

Abstract: A Chatterless AC Solenoid without pole shading is disclosed. The solenoid has a stationery member and a moveable member forming a magnetic circuit having a small but predetermined gap in the magnetic circuit when the moveable member is in the solenoid actuated position, and a much larger gap when the moving member is in the unactuated position. Both the stationery member and the moveable member are fabricated from a relatively soft magnetic material, with a coil associated with the stationery member providing a magnetizing force for the resulting magnetic circuit responsive to a current in the coil.

Abstract: This invention is an emergency, inertia-type circuit breaker that is opened when a vehicle is involved in an accident. Within a fraction of a second after the initial accident impact, current will flow to the unlocked side of electric powered door locks and to auxiliary emergency equipment such as side or rear seat airbags and the like. Once the circuit breaker is completely opened, all electrical systems of the vehicle will be shut down except current to the auxiliary emergency equipment and to the open side of electric powered windows.

Abstract: A control unit for switching AC powered high efficiency lighting in response to a signal from an occupancy sensor. The lighting is switched by a hybrid mechanical relay/semiconductor switch. The semiconductor switch is connected in parallel with the relay switch contacts to protect them and is controlled by a noise-insensitive zero voltage crossing detector circuit which switches the semiconductor switch only at the zero crossings of the AC power. The semiconductor switch is preferably turned on by a pulse forming circuit only for a brief period of time spanning the time when the relay is switching.

Abstract: A corona arc circuit has a spark plug connected in series with a rectifier. A capacitor is connected in series with a spark gap and the spark plug. An electrical power source has a transformer with a primary winding providing an AC voltage and a secondary winding connected to the capacitor via the rectifier for charging the capacitor. The secondary winding is connected to the spark plug via a high voltage diode thereby providing a current path for the spark gap at a predetermined voltage and simultaneously discharging the capacitor through the spark plug via the spark gap without short-circuiting the spark gap.

Abstract: This invention relates to an electric power generation and distribution system, and more particularly to an electric power distribution module for use in such systems, having an insulative support structure which includes integral therewith electrically conductive means which define a circuit for distributing electric power received from one or more power sources to one or more electrical loads, the insulative support structure also including integral therewith current sensing means for sensing a flow of electrical current in the electrically conductive means.

Abstract: An electrical arrangement is disclosed for use in supplying electrical power to the units in a motor vehicle. The arrangement comprises a battery, and an inverter to receive power from the battery and to generate a high frequency signal at an intermediate voltage higher than the voltage of the battery. There is a distribution network to distribute the high frequency signal to the units in the vehicle. At least some of the units supplied with electrical power are provided with step-up transformers to step-up the intermediate voltage to a higher voltage, that higher voltage being used by the units.

Abstract: The present invention features a magnetic field compensation system for suppressing alternating or time-varying magnetic fields in a large volume of space. A magnetic sensor detects within a predetermined range of frequencies and generates a signal. A coil or pair of Helmholtz drive coils is positioned into a volume containing the magnetic sensor. A preamplifier is connected to the magnetic sensor for amplifying the signal. A signal processor is connected to the preamplifier for receiving the signal and for providing phase correction and gain. The signal processor has both an averaging and an absolute peak detector for determining magnetic field average and peak excursions. A power amplifier is connected to the coil or pair of Helmholtz drive coils and to the signal processor for receiving and amplifying the processed signal and for applying it to the coil or pair of Helmholtz drive coils.

Abstract: A high frequency circuit using output drivers with tri-state sections. The plurality of output drivers are connected to an output transmission line. Each driver has a pull-up section, a pull-down section and a tri-state section. Each tri-state section has a low impedance and a high impedance state. Its low impedance state serves to match the impedance of the output transmission line. Its high impedance state isolates its driver from the output transmission line.

Abstract: A digital wiring configuration comprises a switch control allowing a user to select a function to control a corresponding electrical device. A control unit couples electrical power to the electrical devices through power outlets. The control unit allows an operator to dynamically configure the switch controls to operate electrical devices at specified power outlets. Upon selection of a function on the switch control, the switch control transmits both a switch state, indicative of the function selected, and a switch identification that uniquely identifies that switch control. The control unit receives the switch state and the switch identification and generates a device identification uniquely identifying the power outlet corresponding to the control switch. The control unit transmits the device identification and the switch state to the power outlets. The corresponding power outlet is selected through the device identification and executes the function in accordance with the switch state.

Abstract: An apparatus for operating discharge lamps with a stable electric current supply and minimal dimensional area requirements. The apparatus includes an input power source coupled across a capacitor, establishing a first loop circuit. A discharge lamp may also be connected across the capacitor, thereby forming a second loop circuit. A first switch repeatedly turns ON and OFF, making and breaking the first loop circuit at a first frequency, and thereby charges the capacitor. A second switch repeatedly turns ON and OFF, making and breaking the second loop circuit at a second frequency, and thereby discharges the capacitor through the discharge lamp. A control mechanism controls the first and second switches for supplying a predetermined current to the discharge lamp for flickerless operation.