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| Patent # | Description |
|---|---|
| US-4,700,152 |
Non-contacting signal coupling device A non-contacting type of high frequency signal coupling arrangement for coupling RF signals to a television receiver at one or more workstations for alignment or... |
| US-4,700,151 |
Modulation system capable of improving a transmission system In a modulation system responsive to a system input signal for supplying an amplifier having nonlinearities with a modulated analog signal to make the amplifier... |
| US-4,700,150 |
External laser frequency stabilizer An external laser frequency stabilizer combines an acousto-optic frequency shifter and a fast electro-optic phase modulator. A compensating electronic delay line... |
| US-4,700,149 |
Matching beam modulators A method and apparatus for matching the transmission characteristics of two beam modulators (4,4') comprises radiation generating means (30); and the first and... |
| US-4,700,148 |
Shaker table amplifier A solid state amplifier for driving a shaker is described. The amplifier is comprised of a circuit which generates a pulse-width modulated drive signal for... |
| US-4,700,147 |
Transistor power inverter with synchronizing circuit An oscillator circuit for generating a square wave output for space or terrestrial applications comprising a main oscillator and a saturable transformer forming... |
| US-4,700,146 |
Automatic tuning of cavity klystron using sampled RF output A processor-controlled drive motor system for tuning a cavity klystron monitors the output (amplitude-vs-frequency) of the klystron and compares that monitored... |
| US-4,700,145 |
Radially fed microwave signal combiner/distributor apparatus Radially fed microwave signal combiner/distributor apparatus comprising a central coaxial connector which is coupled via radially extending paths to several... |
| US-4,700,144 |
Differential amplifier feedback current mirror A differential amplifier feedback current mirror includes a feedback current source that provides a correction current to one input of a differential amplifier.... |
| US-4,700,143 |
Output correction circuit for transducer means A transducer means for sensing the movement of a component between first and second extreme positions includes a transducer 18 the output of which is applied to... |
| US-4,700,142 |
Method for determining the location of a deep-well casing by magnetic
field sensing Logging apparatus for measuring alternating magnetic fields generated by electric current flow on a subterranean target near a borehole is disclosed. Electric... |
| US-4,700,141 |
Deep penetration well logging sonde A well logging system and method of the present invention determines the dielectric constant and/or conductivity of earth formations some of which have fluid... |
| US-4,700,140 |
Determination of water or residual oil saturation in earth formations
independent of lithology A method for determining the water or residual oil saturation of subsurface earth formations substantially independent of lithology utilizing electromagnetic... |
| US-4,700,139 |
Metal detector circuit having selectable exclusion range for unwanted
objects A metal detector circuit of the balanced induction type is utilized to detect hidden metal objects. A receive signal is provided with two fixed concurrent phase... |
| US-4,700,138 |
Automatic gain control apparatus for NMR imaging system In measuring a number of echo signal, which normally attenuate chronologically, in a single pulse sequence, such as in multi-echo method or a multi-slice method,... |
| US-4,700,137 |
High-frequency magnetic field generator/detector A high-frequency magnetic field generator/detector equipped with a saddle type coil assembly which comprises a combination of two similar windings having power... |
| US-4,700,136 |
NMR imaging apparatus An NMR imaging domain is required to have a uniform distribution of static magnetic field. However, it is very difficult to generate a uniform magnetic field for... |
| US-4,700,135 |
Apparatus for measuring weak magnetic fields having several gradiometers
with associated SQUID array The gradiometers are arranged with their associated SQUIDs in a double-wall Dewar vessel which is equipped with a narrow neck. A gradiometer array is provided... |
| US-4,700,134 |
Method and apparatus for determining the amount of magnetic debris
adhering to the exterior of a tube A method and apparatus for magnetically measuring the amount and location of magnetite (Fe.sub.3 O.sub.4) debris adhering to the exterior of heat exchanger tubes... |
| US-4,700,133 |
Variable reluctance magnetic sensor with pole piece and shell
projections matched to gear teeth A variable reluctance magnetic speed sensor senses the speed of a rotating gear (12). A ferrous outer cylindrical shell (22) extends axially and has a magnet... |
| US-4,700,132 |
Integrated circuit test site An integrated circuit test site assembly for testing pin grid array (PGA) packaged integrated circuits having removable contact pins. The removable contact pins,... |
| US-4,700,131 |
Mutual inductor current sensor The invention set forth herein is a three phase current sensor for providing a signal indicative to the three phase current and phase imbalance. The sensor... |
| US-4,700,130 |
Current-measuring arrangement with overload protection A current measuring arrangement including a measuring resistor can be protected against excess currents by means of a PTC-resistor and an amplifier circuit. This... |
| US-4,700,129 |
Phase measurement apparatus with automatic calibration In a phase measurement apparatus having a phase detector for receiving a first frequency signal from a variable frequency signal generator and a second frequency... |
| US-4,700,128 |
Electronic calibrator An electronic calibrator having a CMOS integrated circuit transmission gate which responds to the output of a multi-vibrator. The output from the transmission... |
| US-4,700,127 |
Microwave probe and rotary body detecting apparatus using the same A microwave probe has a cylindrical support made of stabilized zirconia being excellent in heat insulation, and the cylindrical support is threadably installed... |
| US-4,700,126 |
Vehicular lamp circuit tester An automobile circuit tester is provided having an end connection receivable in the taillight socket, parking light socket, brake light socket or directional... |
| US-4,700,125 |
Power supply switching circuit A power supply switching circuit for supplying a pair of power supply voltages different in level, such as programming voltage V.sub.pp and reference voltage... |
| US-4,700,124 |
Current and frequency controlled voltage regulator A voltage regulator circuit which provides a regulated output voltage by regulating output current at an output terminal is provided. The voltage regulator... |
| US-4,700,123 |
Power distribution systems and means for control thereof In a power distribution system, power line insulators have three electrodes, two of which are connected to the line and to ground, and the third of which forms a... |
| US-4,700,122 |
Power supply filtering with rechargeable battery element A combined electrical filter and interrupted energy source for a space satellite or other DC powered apparatus. The disclosed filter battery preferably employs... |
| US-4,700,121 |
Automatic system for changing the electricity supply source on a mobile
operating arm unit An automatic system for changing the electricity supply source on a mobile unit with an operating arm the system comprising a station for storing the electricity... |
| US-4,700,120 |
Control for a stepper motor or other synchronous motor Closed loop control for a stepper motor or other synchronous motor. A digital/frequency interface provides drive current to the motor at a frequency determined... |
| US-4,700,119 |
Apparatus for positioning carriage in automatic transportation system An apparatus for positioning a carriage of an automatic transportation system is provided. At least a pair of magnetic cores spaced from each other in the... |
| US-4,700,118 |
System for setting workpiece Cartesian coordinate system of robot Provided is a system for setting a workpiece Cartesian coordinate system in a robot. In teaching the nose position (TCP) of a working member (tool) mounted on... |
| US-4,700,117 |
Centrifuge overspeed protection and imbalance detection system A centrifuge overspeed protection and imbalance detection system is structured to provide a method for detecting rotor imbalance and rotor overspeed. The system... |
| US-4,700,116 |
System for controlling brushless DC motor A brushless DC motor control system comprises a commercially available semiconductor commutator supplying field current to stator windings of the DC motor, a... |
| US-4,700,115 |
Method of starting an electronically commutated direct-current motor Process for starting an electronically switched d.c. motor with n coils cyclically activated by pulses which are derived from the rotation of the motor. First,... |
| US-4,700,114 |
Vertical deflection circuit A vertical deflection amplifier of a video display apparatus includes first and second transistor amplifier output stages arranged in a totem-pole, push-pull... |
| US-4,700,113 |
Variable high frequency ballast circuit A variable high-frequency ballast circuit for igniting and operating energy saver discharge lamps includes a high frequency inverter that energizes the lamps... |
| US-4,700,112 |
Fluorescent lamp lighting circuit A flourescent lamp lighting circuit comprising a rectifying circuit and an oscillatory circuit. The rectifying circuit comprises a rectifier bridge, capacitors... |
| US-4,700,111 |
High frequency ballast circuit A high frequency ballast circuit powered by a dc input voltage source for starting and operating a gas discharge lamp load, comprising: a means for providing... |
| US-4,700,110 |
Lamp switching A second lamp is connected to power terminals upon each alternate switching off of a first lamp so that, upon each alternate switching on of the first lamp, the... |
| US-4,700,109 |
Crossed-field amplifier An improvement to an existing crossed-field amplifier is shown which includes the replacement of an existing thermionic emitter with a larger platinum emitter.... |
| US-4,700,108 |
Cavity system for a particle beam accelerator Apparatus and method for generating and controlling the electric field within the cavity of a particle beam accelerator. A power splitter divides a common drive... |
| US-4,700,107 |
High-pressure discharge lamp having a tungsten sheet electrode An electrode head for a high-pressure discharge lamp consists of tungsten sheet material formed as a flat or curved plate having an elongated end face having a... |
| US-4,700,106 |
Color picture tube deflection unit A color picture tube comprises electron guns disposed in the corners of a triangle, a slit-type shadow mask and a phosphor screen consisting of vertical phosphor... |
| US-4,700,105 |
Shadow mask mount for color picture tube A plurality of spaced reinforcing plates 6 are provided around the periphery of a Hip Up configured shadow mask 2 and its support frame 3 in a color picture tube... |
| US-4,700,104 |
Color television shadow mask assembly A color picture tube comprises a tube envelope having a tube axis and including a neck section, a funnel section and a panel section, an electron gun assembly... |
| US-4,700,103 |
Spark plug and its electrode configuration A spark plug in which a noble metal tip welded to the leading end face of a center electrode is in the form of a fine wire while a noble metal tip welded to the... |
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