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| Patent # | Description |
|---|---|
| US-4,839,573 |
Method and apparatus for feedback control loop bandwidth and phase
margin regulation Method and apparatus for providing selfadaptive feedback control loop bandwidth and phase margin regulation automatically, to rapidly and predictably closely... |
| US-4,839,572 |
Multiplex motor control system with automatic motor deactivation A motor control system includes a motor, a switch which generates a motor activation signal, a motor power source, and a multiplex system. The multiplex system... |
| US-4,839,571 |
Safety back-up for metering pump control A system to detect partial or complete failure of an accurate meter measuring the flow of a liquid by using a sensor to measure the displacement of the pump as a... |
| US-4,839,570 |
Current limiting control circuit for d.c. motors A current limiting control circuit for a d.c. motor, wherein compensation is provided for the inherent voltage drop across the armature of the d.c. motor with a... |
| US-4,839,569 |
Method and apparatus for providing gain control for an image intensifier
tube A photocathode current sensing circuit (58) is provided to adjust the electron accelerating voltage to a cone (32) and a phosphor screen (34) on an image... |
| US-4,839,568 |
Magnetic deflector for trichromatic tube with shield and method to set
this deflector A magnetic deflector of the saddle-saddle type, for a trichromatic tube protected by a shield, with in-line guns and round-luminophor type screen, is designed to... |
| US-4,839,567 |
Illuminated aerial marker An illuminated aerial marker for a high voltage transmission line using a spherical colored opaque capacitor with neon lamps in series or series/parallel or... |
| US-4,839,566 |
Circuit for supplying power to a dental photopolymerizing apparatus An electric lamp for the photopolymerization of dental materials is supplied with constant electric power so that constant light output is obtained. The control... |
| US-4,839,565 |
High pressure double wall sodium arc tube and methods of operating such A high intensity discharge metal vapor lamp comprising an arc tube having an inner chamber vented to the arc tube and disposed therein is disclosed. The... |
| US-4,839,564 |
Large image display apparatus A large image display apparatus comprises a plurality of discharge lamps each having an anode, a cathode and a light emitting tube, a display board having the... |
| US-4,839,563 |
Pulse burst panel drive for electroluminescent displays A thin film electroluminescent display device energized with a rapid burst of pulses during a time less than the decay time of the phosphor yields substantially... |
| US-4,839,562 |
Electrical devices The invention relates to the idea of a device which can be interposed between a lamp and its socket for a variety of purposes including control of the operation... |
| US-4,839,561 |
Gyrotron device A gyrotron device including an electron gun for emitting a hollow electron beam, solenoid coils for generating magnetic fields so as to produce a cyclotron... |
| US-4,839,560 |
Heatable electrode for high-pressure gas discharge lamps An electrode having a self-supporting cylindrical open coil of tungsten or molybdenum wire having a lead wire of tungsten or molybdenum passed coaxially through... |
| US-4,839,559 |
Radiant energy incandescent lamp An electric incandescent lamp for selective radiant energy distribution is disclosed which employs a reflective film for improved efficiency of the lamp... |
| US-4,839,558 |
Integrated DC electroluminescent display system An integrated electroluminescent display (DCEL), in which the DCEL (11) is integrted into the substrate board (10), such as, for example, a printed circuit... |
| US-4,839,557 |
Fill member for electroluminescent panels The present invention is directed to a modified cover plate for a thin film electroluminescent display device. The cover plate of the present invention is... |
| US-4,839,556 |
Cathode-ray tube having an improved shadow mask contour A cathode-ray tube includes a shadow mask mounted therein. The mask has curvatures along its major and minor axes. The curvature along the major axis is greater... |
| US-4,839,555 |
Laminated lighting device A laminated lighting device and a method of manufacturing the device are described. The device comprises layers of a glass having at least one channel formed... |
| US-4,839,554 |
Apparatus for forming an electron beam sheet Apparatus for forming an electron beam sheet includes a cathode member having a slot in a front surface thereof, a grid electrode and the anode of a thyratron.... |
| US-4,839,553 |
Reflector lamp having complementary dichroic filters on the reflector
and lens for emitting colored light The present invention is directed to a sealed beam lamp comprising a lens and a reflector, both of which have been coated with a multiple series of thin, very... |
| US-4,839,552 |
Brushless DC motor A brushless DC motor in which a rotary axis is rotatably mounted in a bearing portion of a stator housing, a rotor yoke is fixedly mounted on an end portion of... |
| US-4,839,551 |
Brushless motor structure enabling accurate relative positioning of
rotor and stator coils A brushless motor is disclosed having a plurality of stator coils disposed circumferentially around a rotatable shaft and a rotor magnet supported to a yoke... |
| US-4,839,550 |
Controlled type magnetic bearing device A controlled type magnetic bearing device which has at least two radius direction magnetic bearings, characterized in that the radius direction magnetic bearing... |
| US-4,839,549 |
Cover assembly to protect an electric motor centrifugal actuator In an electric motor including a rotor on which is mounted a blower and a centrifugal actuator having spring-loaded lever members projecting through a centrally... |
| US-4,839,548 |
Adjustable roller dynamo with torsion spring An external-rotor dynamo for the rear wheel of a bicycle is pivotable about an axis parallel to its axis of rotation. The rotor is pressed toward the wheel rim... |
| US-4,839,547 |
Motor frame and motor with increased cooling capacity A frame for an electric machine characterized by increased cooling capacity. An integral frame member has a pre-determined length defined by outer walls and... |
| US-4,839,546 |
Rotational noise reduction structure in dc motor with rotor magnets A method and apparatus for reducing the rotational noise in dc motors with rotor magnets, comprising forming the rotor magnet so that its magnetic center plane... |
| US-4,839,545 |
Cooling system for linear motor An armature of a linear motor is cooled by a serpentine channel formed in the lower surface thereof and sealed with a sealing plate. In one embodiment, the... |
| US-4,839,544 |
Apparatus for driving a curtain A driving apparatus of a curtain includes a field portion disposed in a curtain rail containing a curved portion. The field portion includes a yoke and a magnet... |
| US-4,839,543 |
Linear motor A moving coil linear motor having a central row of alternating, permanent magnets, with multi-phase, multi-pole coil assemblies located on both sides of the... |
| US-4,839,542 |
Active transconductance filter device An integrator is described that is useful in forming low pass, band pass, high pass, and band stop filters. The integrator comprises a transconductance amplifier... |
| US-4,839,541 |
Synchronizer having dual feedback loops for avoiding intermediate
voltage errors A synchronizer is comprised of a voltage amplifier having an input terminal for receiving a voltage sample and an output terminal for generating an output... |
| US-4,839,540 |
Tri-state output circuit A tri-state output circuit comprising an input section having complementary field effect transistors which constitute NOR gate and investor circuits, a control... |
| US-4,839,539 |
Partially enabled programmable logic device A programmable logic device include an AND gate array and an OR gate array, at least one of which is programmable by the user. The AND gate array includes a... |
| US-4,839,538 |
Impact bipolar integrated circuit designed to eliminate output glitches
caused by negative chip ground spikes The disclosure relates to a circuit for compensation for ground glitches in an integrated circuit wherein there is provided a glitch fix circuit wherein a node... |
| US-4,839,537 |
BicMO logic circuit A logic circuit comprises an input section for inputting a signal and outputting an output signal through a CMOS inverter circuit; an output section having first... |
| US-4,839,536 |
Optically nonlinear pyridine-N-oxide complexes Compounds capable of second harmonic generation are provided for use in a nonlinear optical device, in combination, a harmonic-generating medium, means for... |
| US-4,839,535 |
MOS bandgap voltage reference circuit A bandgap voltage reference circuit manufactured with a MOS process is provided which is stable over temperature variations as well as variations in threshold... |
| US-4,839,534 |
Method and apparatus for establishing a system clock in response to the
level of one of two clock signal sources A system clock is produced either from clock signals (t1) recovered in a clock regenerator, based on surface wave filtered technology and having level... |
| US-4,839,533 |
Remote safety switch A foot operated safety switch, preferably including an electronic control reset circuit, is connected between a source of electrical current and the power cord... |
| US-4,839,532 |
Control system for vehicular passive seat belt arrangement A control system for a passive seat belt arrangement of an automotive vehicle. A drive motor of the control system is in an electric circuit and adapted to... |
| US-4,839,531 |
Computer network interconnecting apparatus An interconnect device permits use of 150 ohm twisted pair transmission lines to interconnect computers designed for use with 75 ohm coaxial cable. The device... |
| US-4,839,530 |
Information handling and control systems A battery (+V) operable information handling and control system, for example for an automotive vehicle electrical system, has a central unit (10) and a number of... |
| US-4,839,529 |
Arrangement for in situ determination of quantity of turbid matter
aerosol and/or dust in fluid which flows... An arrangement for in situ determination of the quantity of turbid matter, aerosol and/or dust in flue gas which flows through a flue by measurement of intensity... |
| US-4,839,528 |
Particle analyzing apparatus using an afocal light beam A light is applied to particles to be examined in a cell, the scattered light from the particles to be examined is converted to an afocal light, a beam splitter... |
| US-4,839,527 |
Optical-fibre smoke detection/analysis system A sensor system for the detection and/or analysis of smoke, gas or the like, comprising a detection means 6 connected to an analyser means 2 via fiber-optic... |
| US-4,839,526 |
Coordinate measuring method and device A method and device for sensing the presence and location of an object in a reference plane by directing light along a line prependicular to the plane, defining... |
| US-4,839,525 |
Method of and apparatus for measuring coordinates of edges of tape A method of and an apparatus for measuring the coordinates of each edge of a tape is disclosed. The method comprises the steps of attaching a tape to a surface... |
| US-4,839,524 |
Filter for isotopic alteration of mercury vapor A filter for enriching the .sup.196 Hg content of mercury, including a reactor, a low pressure electric discharge lamp containing a fill of mercury and an inert... |
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