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| Patent # | Description |
|---|---|
| US-4,672,287 |
Induction motor digital control system An induction motor control system in which the actual velocity of an induction motor follows a commanded velocity by correcting a difference between actual... |
| US-4,672,286 |
Induction motor drive circuits A drive circuit for a three-phase induction motor comprises an inverter bridge consisting of six bridge switches, and a logic speed controller which controls... |
| US-4,672,285 |
Inverter control circuit An inverter control circuit adapted, in the process to slow down and stop an induction motor, such that supply of the clock for combining voltage patterns is cut... |
| US-4,672,284 |
Permanent split-phase capacitor induction motor A permanent split-phase capacitor induction motor having a capacitor (7) connected in series with an auxiliary winding (5) via an electronic switch (9) which is... |
| US-4,672,283 |
Control circuit for stepping motor A control circuit can drive a stepping motor within a wide supply voltage range without step-out of the rotor. The control circuit includes an A/D converter for... |
| US-4,672,282 |
Stepping motor control circuit Circuitry for measuring the torque of a stepping motor is disclosed. The circuitry is based on the fact that the decay time of the current flowing through the... |
| US-4,672,281 |
Control for electric motor that drives a robotic appendage A control for an electric motor which drives a robotic appendage toward and into engagement with an object. In one embodiment, the control causes the robotic... |
| US-4,672,280 |
Mobile robot calling system A mobile robot calling system has a mobile robot normally waiting at a home position and connected to an AC power supply such that its battery is charged by the... |
| US-4,672,279 |
Robot joint angle detecting system In a system for detecting an angle of a joint coupled through a reduction mechanism to a drive motor, an absolute type rotation angle detector and an... |
| US-4,672,278 |
Antenna relay method and apparatus An antenna motor drive system for raising and lowering an antenna. Response to a user input for raising or lowering a vehicle antenna is delayed to avoid rapid... |
| US-4,672,277 |
Elevator motor control A method and apparatus for controlling a direct current motor of an elevator during emergency braking by conducting a current generated by the motor through a... |
| US-4,672,276 |
CRT astigmatism correction apparatus with stored correction values Apparatus for correcting astigmatism produced by the electromagnetic deflection yoke of a cathode-ray-tube includes plural stigmator electrodes provided with... |
| US-4,672,275 |
Digital process and apparatus for convergence correction having
adjustment points and correction portions... A plurality of images superimposed to form a composite image on the screen of a television monitor are brought into convergence (register) by forming a reference... |
| US-4,672,274 |
Motor control circuit for video tape recorders A cylinder drive motor includes a magnetized annular member having a series of equally spaced apart alternating pole elements and an additional pole element... |
| US-4,672,273 |
Electronic flash device for camera The enclosed electronic flash device for a camera includes a booster circuit connectible to an electrical power source or battery, a high voltage rectifier diode... |
| US-4,672,272 |
Flat picture reproduction device A flat picture reproducing device includes a vaccum-tight envelope containing an electrode matrix formed of row conductors and column conductors disposed in... |
| US-4,672,271 |
Apparatus and method for automatic operation of a high pressure mercury
arc lamp Apparatus and method for automatic control of with a high pressure mercury arc lamp is described. The apparatus includes a control unit that monitors the current... |
| US-4,672,270 |
Metal vapor discharge lamp having a starting device of a thermal switch
type A metal vapor discharge lamp has a burner for sealing xenon gas, mercury and a light-emitting additive in a translucent ceramic tube, a starting device of a... |
| US-4,672,269 |
Built-in resistor for a cathode ray tube A structure for a resistor to be built into a cathode ray tube. The built-in resistor divides an applied anode potential into an intermediate focusing potential.... |
| US-4,672,268 |
Gas discharge lamp with sintered cathode A gas discharge lamp such as a flashbulb consisting of an anode and a cathode in a transparent housing, the cathode being composed of a sintered member made up... |
| US-4,672,267 |
High intensity discharge device containing oxytrihalides A fill composition for a high intensity discharge device including mercury, niobium oxytrihalide, and a molecular stabilization agent is provided. The molar... |
| US-4,672,266 |
Thin film light emitting element A thin film light emitting element including a light emitting layer and first and second dielectric layers which interpose opposite faces of the light emitting... |
| US-4,672,265 |
Electroluminescent device An electroluminescent device comprises a double layer electroluminescent member sandwiched between a pair of electrodes. At least one layer of the two... |
| US-4,672,264 |
High contrast electroluminescent display panels A d.c. or a.c. electroluminescent panel comprises a transparent substrate, a transparent first electrode film, a thin film phosphor layer, a control layer and a... |
| US-4,672,263 |
Single-ended fluorescent discharge lamp construction To eliminate the necessity for a temperature-hardening cement to set the ular ends of paired discharge tubes into a plastic base, a holding element (7),... |
| US-4,672,262 |
Electron beam injection structure for flat panel display devices An electron injection structure for the beam guide meshes of a flat panel display has apertures with different dimensions to optimize beam focusing for different... |
| US-4,672,261 |
Electron gun for color picture tube An inline electron gun for color picture tube comprises a main lens including a plurality of electrodes spaced apart to each other and each of these electrodes... |
| US-4,672,260 |
Registration-enhancing means and method for color cathode ray tubes
having the tensed foil shadow mask A glass faceplate for use in a color cathode ray tube has a target area with a pattern of phosphor deposits circumscribed by a sealing area, and a frame... |
| US-4,672,259 |
Power spark gap assembly for high current conduction with improved
sparkover level control A power spark gap for protection of electrical equipment against overvoltages and having high current handling capacity is provided consisting of two carbon... |
| US-4,672,258 |
Semiconductor light source device in image output device As the amount of light from the semiconductor light source varies depending on the temperature, the amount of exposure varies correspondingly, resulting in a... |
| US-4,672,257 |
Piezoelectric latching actuator having an impact receiving projectile Disclosed is a piezoelectric actuator comprising a pair of piezoelectric elements, bistable snap-action means, and projectile means attached to the snap-action... |
| US-4,672,256 |
Linear vibration wave motor A vibration wave motor, in which a periodic voltage is applied to an electrostrictive element to generate a travelling vibration wave in the surface of a... |
| US-4,672,255 |
Surface acoustic wave device A surface acoustic wave device has been developed, such as a surface acoustic wave filter in which a plurality of electroacoustic interdigital electrodes are... |
| US-4,672,254 |
Surface acoustic wave devices and method of manufacture thereof A phase and amplitude compensated surface acoustic wave (SAW) structure is described in which computer controlled compensation is achieved by laser chemical... |
| US-4,672,253 |
Permanent magnet electrical machine with reduced cogging A permanent magnet electric machine such as, for example, a motor or generator, including a permanent magnet field member, an armature having salient magnetic... |
| US-4,672,252 |
Electrical machine with a stator lamination of grain-oriented sheets The laminations of a laminated stator of a slowly running electrical machine having a high number of poles are composed of grain-oriented sheets, each of which... |
| US-4,672,251 |
Pole changeable, three phase windings A 3-phase, pole-changeable, phase-modulated winding providing alternative pole-number working by 6-terminal changeover switching. The winding provides... |
| US-4,672,250 |
Drive motor bearing apparatus A disk drive motor has a mounting plate with a circuit board on one face and a cylindrical hub extending therethrough. A stator is secured to the plate and... |
| US-4,672,249 |
Submersible electric motor having floating bearings A submersible electric motor for use in submersible pump or the like, in which an upright motor shaft is supported by upper and lower thrust bearings for... |
| US-4,672,248 |
High speed brushless dynamoelectric machine with improved control wheel
assembly for excitation system components A brushless dynamoelectric machine with a molded insulating control wheel having a rim on whose inner surface the rectifiers and other components of the starting... |
| US-4,672,247 |
Synchronous or stepping motor with equal-torque stepping A hybrid stepper motor having two alternately excited magnetic systems, one providing positions of 0.degree. and 180.degree., and the other positions of... |
| US-4,672,246 |
Low offset MOSFET transistor switch control A MOSFET transistor switch control circuit using high impedance, low offset, ground referenced control is disclosed. The invention comprises a first enhancement... |
| US-4,672,245 |
High frequency diverse semiconductor switch Provided is a power semiconductor device operable to be switched at high frequencies. The semiconductor device according to the present invention is applied to a... |
| US-4,672,244 |
Josephson logic integrated circuit A Josephson logic integrated circuit packaged on a single substrate, wherein a portion for delivering an output out of the integrated circuit is constructed of... |
| US-4,672,243 |
Zero standby current TTL to CMOS input buffer A TTL to CMOS input buffer (20) which prevents static current flow when the TTL input signal is at a relatively low voltage logic "1" state. A transition... |
| US-4,672,242 |
Reduced power/temperature controlled TTL tri-state buffer utilizing
three phase splitter transistors A tri-level buffer circuit includes three phase splitter bipolar transistors. The buffer circuit consumes less power in the tri-state mode than in the low logic... |
| US-4,672,241 |
High voltage isolation circuit for CMOS networks A high voltage isolation circuit for CMOS networks includes a N-channel MOS pass transistor for isolating a high voltage node from a low voltage node so as to... |
| US-4,672,240 |
Programmable redundancy circuit A memory redundancy circuit is described incorporating a sequential row or column counter associated with a plurality of programmable row or column decoders. The... |
| US-4,672,239 |
Sample-and-hold circuit arrangement The invention relates to a sample-and-hold circuit arrangement comprising a differential amplifier (5) followed by an inverting amplifier (8). In accordance with... |
| US-4,672,238 |
Signal detecting circuit A signal detecting circuit includes a first source follower having an input connected to a first voltage source, and a second source follower having an input... |
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