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| Patent # | Description |
|---|---|
| US-4,904,919 |
Dual mode control of a PWM motor drive for current limiting A method and circuit for application in a PMW inverter for controlling power to an AC motor in which a hysteresis modulator is employed as a current limiter to... |
| US-4,904,918 |
Power conversion system including an improved filter for attenuating
harmonics For connecting the d-c terminals of a voltage-source inverter to a direct current (d-c) power source, a d-c link capacitor is connected directly between the d-c... |
| US-4,904,917 |
Drive apparatus Drive apparatus, particularly for a twin polygon thermal scanner, utilizes a stepper motor driven by pulses of variable width timed, relative to the rotational... |
| US-4,904,916 |
Electrical control system for stairway wheelchair lift A stairway wheelchair lift includes a stationary motor drive unit, a mobile platform movable along a stairway and a user interface for receiving user-generated... |
| US-4,904,915 |
Velocity control apparatus A velocity control apparatus according to the present invention controls the velocity of the distal end of a load such as a robot upon estimating the velocity of... |
| US-4,904,914 |
NC Data creation method The invention relates to a method of creating NC data for machining the interior of an area. The method includes displaying, on a graphic display unit (106),... |
| US-4,904,913 |
Motor control system for a plastic forming machine A motor control system for a plastic forming machine such as an injection molding machine is disclosed including an interface circuit and a phase inverter for... |
| US-4,904,912 |
Control mechanism employing internal model coordination feedforward
method A control mechanism employing an internal model coordination method according to the present invention is arranged to obtain a manipulation variable by comparing... |
| US-4,904,911 |
System for controlling robot A system for controlling a robot includes a control portion (7) for supplying a control signal to and receiving a control signal from a servo unit (6) for... |
| US-4,904,910 |
Automatic delay-controlling device An automatic delay-controlling device for pre-setting a delay of the switching-on or switching-off of loads such as general motors, lighting apparatuses, etc.,... |
| US-4,904,909 |
Controller for electric clamp A controller for an electric clamp closes the clamp rapidly at first, then runs at a slower speed while contacting the workpiece, and speeds up again after... |
| US-4,904,908 |
Anti blade set vehicle wiper park mechanism A vehicle wiper park mechanism includes a shutoff gear that turns at half the speed and substantially diametrically opposed interrupts that are interconnected... |
| US-4,904,907 |
Ballast circuit for metal halide lamp A ballast circuit and method of operating gas discharge lamps are disclosed. The ballast circuit generates a relatively low frequency regulated square-wave... |
| US-4,904,906 |
Fluorescent light dimming A dimmer for a fluorescent light in which the fluorescent light is supplied with an electrical signal having a varying magnitude, the dimmer positioning a notch... |
| US-4,904,905 |
Dual resonant frequency arc lamp power supply An apparatus for starting and operating an arc lamp used in health care applications includes means for producing a rectangular wave AC signal with a frequency... |
| US-4,904,904 |
Electronic transformer system for powering gaseous discharge lamps An electronic transformer system for powering gaseous discharge lamps includes an output transformer having a load connected to a secondary winding and having a... |
| US-4,904,903 |
Ballast for high intensity discharge lamps An electronic ballast for high intensity discharge lamps is taught. A high speed electronic switch gates voltage across the lamp only for that period of time... |
| US-4,904,902 |
Ion implanting system In an ion implanting apparatus, a first conductor member for monitoring the charge-up of the workpiece is positioned on the front face of a wafer disk, a second... |
| US-4,904,901 |
Electrolumescent panels An electroluminescent panel and method of making the same includes a plurality of layers on a transparent electrode in which each layer is formed with the same... |
| US-4,904,900 |
Glow discharge lamp A glow discharge lamp that includes a light transmitting envelope containing a noble gas fill material and a pair of electrodes disposed in the envelope. Lead-in... |
| US-4,904,899 |
Projection cathode ray tube A projection cathode ray tube which comprises a glass bulb consisting of a funnel portion having a large opening at one side and a small opening at the opposite... |
| US-4,904,898 |
Monochrome cathode ray tube electron gun with high voltage electrode lens A monochrome cathode ray tube incorporates an electron gun featuring a focusing electrode having an upper cup-shaped portion comprising a top cylindrical... |
| US-4,904,897 |
Oxide cathode An oxide cathode comprising a base 1 which consists substantially of titanium and a heater element 5 coated with aluminium oxide 6 to heat the base 1, which... |
| US-4,904,896 |
Vacuum electron tube having an oxide cathode comprising chromium
reducing agent In a vacuum electron tube, a novel oxide cathode comprising a metal substrate, means for heating said substrate to its operating temperature, and a layer of... |
| US-4,904,895 |
Electron emission device An electron emission device comprises an electron emission electrode with a pointed end and a counter electrode positioned opposite to the pointed end, both... |
| US-4,904,894 |
Hail sensor A hail sensor is disclosed which contains a piezoelectric transducer positioned to produce an output signal when it is vibrated by a hailstone. In one... |
| US-4,904,893 |
Stator end cap insulator assembly including end turn ventilation and
lead wire tie down structure An improved stator end cap insulator assembly for a stator core wherein molded end cap insulator structure for the stator core includes end turn restraining... |
| US-4,904,892 |
Spindles for a spinning machine with individual drives A spindle for a ring spinning machine has an electric motor for rotating the spindle. The electric motor has a stator having a generally square configured stack... |
| US-4,904,891 |
Ventilated electric motor assembly An electric motor ventilation structure having an interior fan with a dual concentric set of radially disposed blades located within an endshield of said motor... |
| US-4,904,890 |
Bore pack exciter cooling system A gas cooling system for a bore pack exciter for a power generator in which high velocity, colder cooling gas is obtained from the region within the generator... |
| US-4,904,889 |
Circuit for driving electronic devices with a low supply voltage A driving circuit comprising a low-voltage power supply line, a MOS transistor having a gate terminal and a drain terminal connected to a load and a control... |
| US-4,904,888 |
Sense amplifier circuit In order to enhance the sensitivity of a sense amplifier circuit, each one of the transistor pair composing the sense amplifier circuit is formed by transistors... |
| US-4,904,887 |
Semiconductor integrated circuit apparatus A semiconductor integrated-circuit apparatus includes an electro-conductive layer formed on a substrate, a plurality of internal cells formed on the ... |
| US-4,904,886 |
Gate array with high driving ability cells A gate array for implementing a digital integrated circuit includes first cells and second cells of different kinds which are selectively usable depending upon... |
| US-4,904,885 |
Substrate bias circuit having substrate bias voltage clamp and operating
method therefor A substrate bias circuit controls application of a conventional substrate charge pump to the substrate of a semiconductor integrated circuit to prevent latching... |
| US-4,904,884 |
Schmitt trigger adapted to interface between different transistor
architectures A Schmitt trigger having first and second complementary switches is biased to exhibit hysteresis, switching at a high threshold level when the input signal... |
| US-4,904,883 |
Semiconductor integrated circuit having a DC test function An integrated circuit receiving an input signal and producing output signal including: a set/reset circuit, operatively connected to an internal main circuit,... |
| US-4,904,882 |
Superconducting optical switch A combination of optical interconnect technology with superconducting matal to form a superconducting neural network array. Superconducting material in a matrix... |
| US-4,904,881 |
EXCLUSIVE-OR cell for neural network and the like A semiconductor cell for producing an output current that is related to the match between an input vector pattern and a weighting pattern is described. The cell... |
| US-4,904,880 |
Automatic door driving system An automatic door driving system is disclosed, which can electrically perform automatic door opening/closing operation in case of emergency, i.e., occurrence of... |
| US-4,904,879 |
Data current coupler and methods of making and assembling same A coupler assembly for noninvasive coupling to conductor wires of a twisted pair cable of a data bus uses mating pairs of E-shaped electromagnets defining a pair... |
| US-4,904,878 |
Multi-point refractive liquid level sensor An apparatus is used for sensing liquid level in a vessel at multiple levels and with variable resolution using optical properties. Known electrical optical... |
| US-4,904,877 |
Optical scanning apparatus for detecting faults in transparent material
wherein the plane of incident light is... An optical scanning apparatus for transparent, substantially flat material comprises a light source (21) and a mirror wheel (22) illuminated by the light beam.... |
| US-4,904,876 |
Detection of ultraviolet radiation A device for detecting ultraviolet radiation comprises a measuring head (101) to receive the ultraviolet radiation and comprising a filter (112) which emits... |
| US-4,904,875 |
Facial tissue splice detector system A system for detecting a splice in a single facial tissue in a stack of facial tissues wherein a detector agent is applied at the location of the splice, the... |
| US-4,904,874 |
Apparatus for irradiating fluids A device for irradiating liquids including a hollow tube capable of transmitting selected wavelengths of light, a drive motor connected to rotate the tube at a... |
| US-4,904,873 |
Method of producing and guiding intensive, large-area ion, electron and
x-ray beams A method for the repeatable generation and guidance of intensive, large-area ion, electron and x-ray beams, with the beam guidance being effected already in the... |
| US-4,904,872 |
Method for generating extremely short ion pulses of high intensity from
a pulsed ion source In a method for generating extremely short ion pulses having a high intensity and a pulsed ion source to generate extremely short ion pulses having a high... |
| US-4,904,871 |
Method of determining radioactivity of low energy beta rays This invention is a technique to determine radioactivity of low energy beta emitters using liquid scintillator. Corrections for regression equations which... |
| US-4,904,870 |
Device and method for correcting sensitivity of a gamma camera A gamma camera sensitivity correction device and method which utilizes the fact that the collimator's characteristic correction coefficients do not change with... |
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