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| Number | Title | Issue Date |
| 5564120 | Data management method in a distributed processing system A data management method in a distributed processing system having a plurality of processors connected through a common transmission line with at least one processor having at least one external device connected therewith, for sending to the common transm... | 10/08/1996 |
| 4417200 | Current control A method and a device which are dependently and cojointly employed in the accurate control of the increase and decrease of alternating current, direct current, and concomitant electrical current extending through circuitry and passing to and through elect... | 11/22/1983 |
| 4413226 | Voltage regulator circuit An integrated voltage regulator circuit for providing a DC regulated output voltage which rejects perturbations in the supply voltage, comprising a current source, and a load circuit coupled with outputs of the current source which is referenced to ground... | 11/01/1983 |
| 4413224 | Micropower system A micropower DC/DC conversion system providing a stabilized voltage output at a predetermined voltage higher than that of the energy source. The system is powered by one or more primary cells in parallel or by a suitable battery, and the system is of spec... | 11/01/1983 |
| 4413225 | Method of operating an electrostatic precipitator A method for operating an electrostatic precipitator with a DC voltage and superimposed pulses or superimposed AC voltage in which individual parameters such as amplitudes, pulse repetition frequency, pulse width, etc. are iteratively and continuously var... | 11/01/1983 |
| 4409509 | Piezoelectrically driven transducer for electron work function and contact potential measurements The resonance of a piezoelectric vibrating element itself sets the frequency of the excitation producing ac oscillator for e.g. Kelvin probe or chopper applications. The oscillation amplitude is continuously adjustable. The superposition of a dc voltage i... | 10/11/1983 |
| 4408267 | DC-to-DC Switching converters DC-to-dc switching converters that deliver non-pulsating output current use a conventional transformer and a flyback transformer with primary windings recurrently connected in series to the primary d-c energy source and with secondary windings alternately... | 10/04/1983 |
| 4406967 | Ultrasonic probe The ultrasonic probe of this invention contains a uniaxially elongated polymer piezoelectric element in which the piezoelectric element provided at the both sides with a thin layer electrode is disposed such that at least one of the electrodes is divided ... | 09/27/1983 |
| 4405977 | Commutation circuits for thyristor inverters The commutation circuit for commutating a conducting thyristor includes an inductance, a capacitance and a commutation thyristor all connected in series with the conducting thyristor and the dc source, the commutation thyristor initiates the commutation w... | 09/20/1983 |
| 4400662 | Method and apparatus for energizing an electrostatic precipitator A method and apparatus for providing a pulse-generating control to energize the electrodes of an electrostatic precipitator which includes means for producing a voltage between the electrodes of the precipitator after a voltage pulse has been applied to t... | 08/23/1983 |
| 4399499 | Bi-lateral four quadrant power converter A power converter which supplies AC or positive or negative DC output voltage with positive or negative current while isolating the output voltage from the input power source. This converter includes a pulse width modulator converts power amplitude signal... | 08/16/1983 |
| 4398114 | Surface-acoustic-wave parametric device A surface-acoustic-wave parametric device includes in that a plurality of pumping electrodes arranged along a propagation path of surface acoustic wave. Values of DC bias voltages to be applied to the respective pumping electrodes for forming parametric i... | 08/09/1983 |
| 4398141 | Static VAR generators There is provided by this invention a static VAR generator having an auxiliary shutdown firing pulse generator that initiates a thyristor controlled inductive current to cancel only capacitive current supplied by the static VAR generator in the event of f... | 08/09/1983 |
| 4396852 | Windmill A windmill (10) has a member (12) which is torsionally displaceable and coupled to a transducer (62) to produce usable energy.... | 08/02/1983 |
| 4396851 | Surface acoustic wave device A surface acoustic wave device is provided with plural sets of input and output transducers arranged on a piezoelectric substrate with the input transducers and the output transducers being connected electrically in parallel, respectively. In order to min... | 08/02/1983 |
| 4395751 | Flux-balanced variable frequency inverter Replacing the timing core of a conventional two-core inverter with a magnetic amplifier allows for control of frequency and for B-H loop symmetry. Switching of the magnetic amplifier results in inverter commutation rather than the familiar pulse width mod... | 07/26/1983 |
| 4394724 | Propulsion motor control apparatus and method A vehicle propulsion motor control apparatus includes a motor current regulating chopper apparatus and a free wheeling diode in the motor circuit. It is desired that the chopper apparatus not be commutated OFF when the free wheeling diode is conducting mo... | 07/19/1983 |
| 4394722 | Television receiver high voltage generator In a television receiver having a picture tube that requires an ultor accelerating potential and an intermediate direct voltage, such as a focus voltage, a high voltage generator is provided that develops the two voltages. A source of alternating voltage ... | 07/19/1983 |
| 4394614 | Static VAR generators There is provided by this invention a static VAR generator having an auxiliary shutdown firing pulse generator that initiates a thyristor controlled inductive current to cancel any capacitive current supplied by the static VAR generator in the event of fa... | 07/19/1983 |
| 4393441 | High voltage power supply A modified double Greinacher high voltage power supply wherein the side-string capacitances thereof have an inductance associated in series therewith, the inductance/capacitance circuits being appropriately tuned to the frequency of the R-F input voltage ... | 07/12/1983 |
| 4393321 | Surface acoustic wave transducer An interdigital surface acoustic wave transducer comprises a substrate having at least two areas. One area has piezoelectric properties. Laid down on it is a main row with electrodes. The other area has no piezoelectric properties and carries an additiona... | 07/12/1983 |
| 4390832 | Circuit for electro mechanical tubing sealer A pair of jaws moveable with respect to one another whether mounted in a hand held sealer or desk mounted sealer, compresses, heats, elongates, spreads and welds liquid filled tubing placed therebetween. Variants of the pair of jaws provide means for seri... | 06/28/1983 |
| 4390940 | Process and system for producing photovoltaic power The invention relates to a process and system for obtaining the maximum power from an assembly of photovoltaic cells. According to the invention, the D.C. power furnished by said assembly is converted, with the aid of a converter controlled by a modulated... | 06/28/1983 |
| 4390939 | Electric power source device An electric power source device for electrolytical production or coloring of alumilite, wherein pulses are generated at a predetermined phase of A.C. source, the pulses are frequency-divided by a non-contact circuit and, depending on the results of the fr... | 06/28/1983 |
| 4389702 | Switching power supply circuit having constant output for a wide range of input voltage A switching power supply is disclosed using a single transistor circuit which provides a constant output voltage for a range of input voltages extending from a nominal 115 volt power supply to a nominal 220/240 volt power supply without requiring a change... | 06/21/1983 |
| 4387318 | Piezoelectric fluid-electric generator A piezoelectric fluid-electric generator including: a piezoelectric bending element; means for mounting one end of the bending element in a fluid stream; means for driving the piezoelectric bending element to oscillate with the energy of the fluid stream;... | 06/07/1983 |
| 4385347 | Power supply This invention concerns a power supply arrangement which comprises a direct current power source circuit (A) including a battery (10), a voltage converter circuit (B) including an oscillator circuit (OC), an oscillating transformer (11) and an oscillation... | 05/24/1983 |
| 4384230 | Digital piezoelectric actuator A linear extension piezoelectric actuator comprises a displacement generator having a plurality of discrete groups of piezoelectric material segments disposed coaxially along the extension axis of the actuator, each group being energized separately by vol... | 05/17/1983 |
| 4384259 | Electrical power supplies A power supply suitable for energizing an isolation amplifier requiring its input section to be isolated electrically from its output section. The power supply consists of a primary circuit, which, when energized by an electrical supply, converts the elec... | 05/17/1983 |
| 4384247 | Under-load switching device particularly adapted for voltage regulation and balance An under-load switching device particularly adapted for use with a transformer having voltage taps for voltage regulation and for balancing the phase voltages in a multi-phase AC power system includes a pair of rotary tap selectors connected in parallel t... | 05/17/1983 |
| 4384228 | Acousto-electric transducer An array of transducers is mounted on a base and means are provided for causing surface waves that emanate in opposite directions along the base to be reflected by transducers on either side so as to follow paths of respectively different lengths in going... | 05/17/1983 |
| 4383294 | Voltage doubler with delayed loading A voltage doubler power supply for deriving power from a unidirectional source, including a driver and means preventing current flow until after a first positive alternation of the driver.... | 05/10/1983 |
| 4382204 | Tuning fork-shaped quartz oscillator A tuning fork-shaped quartz oscillator comprises a U-shaped quartz oscillator body which comprises of a pair of vibration arms having a rectangular cross section and a base connecting the vibration arms at one end. Four excitation electrodes are provided ... | 05/03/1983 |
| 4382201 | Ultrasonic transducer and process to obtain high acoustic attenuation in the backing A high frequency ultrasonic transducer is improved by fabricating the tungsten-polyvinyl chloride composite, which backs the elements, in a specific manner. Small particle size tungsten powder and PVC powder are placed into a high pressure die. Standard p... | 05/03/1983 |
| 4382202 | Piezoelectric loading device An actuating device for loading a piezoelectric element including a loading element and a control element each fixed, respectively, upon one of a pair of relatively rotatable parts which may form part of a clutch. Cam projections on the control element in... | 05/03/1983 |
| 4382276 | AC-DC Electric power converting station An AC-DC electric power converting station is provided wherein circuit lines consisting of converter transformers/ positive and negative polarity valve structures/ DC reactors/ DC circuit breakers are of L-shape and inverted L-shape. The positive and nega... | 05/03/1983 |
| 4381470 | Stratified particle absorber The base for an array of piezoelectric crystals contains tungsten particles that are compression-molded in a binder, the size of the particles at and near the surface on which the crystals are mounted being smaller than the size of the particles remote fr... | 04/26/1983 |
| 4380729 | Switching regulator A switching regulator which chops an unstabilized D.C. input voltage by a switching transistor and rectifies the chopped voltage to produce a stabilized D.C. output voltage is disclosed. A series circuit of a resistor, a capacitor and a coil is inserted b... | 04/19/1983 |
| 4380045 | Thyristor convertor failure detection device A failure detection device for a convertor which converts alternating current into a direct current through a plurality of rectifying thyristors. The waveform of the output direct current of the convertor is detected and is supplied to a band-pass filter ... | 04/12/1983 |
| 4379325 | System for bridging brief network failures An arrangement for bridging brief network failures in intermediate-link converters converts the kinetic energy in load motors into electrical energy by reducing the frequency of the converter. Such a frequency reduction is performed in accordance with the... | 04/05/1983 |
