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| Patent # | Description |
|---|---|
| US-4,697,134 |
Apparatus and method for measuring battery condition A testing device measures the impedance of secondary cells that form a battery, such as a lead acid battery, while the battery is in a float charge condition and... |
| US-4,697,133 |
Rechargeable battery powered toy An article having an electric motor which is powered by a battery which is capable of being recharged and which is connected and disconnected to the electric... |
| US-4,697,132 |
Reduction of voltage drop in power distribution systems and of loss of
motor torque Apparatus and method for reducing the voltage drop in an electrical power distribution system during the starting of a multi-phase induction motor having stator... |
| US-4,697,131 |
Voltage source inverter and variable frequency, constant voltage AC
motor drive embodying the same A constant voltage voltage-source inverter of a motor drive includes in its DC-link the combination of diode means, a GTO device and an auxiliary thyristor, the... |
| US-4,697,130 |
Induction motor regenerative brake control apparatus and method An AC induction motor brake control apparatus and method are provided for energizing the motor with an inverter supplied first voltage and an additional brake... |
| US-4,697,129 |
Stepping motor drive system and method capable of stopping the rotor in
a required angular position In a stepping motor of the type having one or more sets of four phase windings on respective stator poles, with the four phase windings being excited... |
| US-4,697,128 |
Control apparatus for a rotor supported by an electromagnetic bearing The present invention reduces the resonance amplitude of the rotational frequency-synchronous unbalance vibration of a rotor supported by an electromagnetic... |
| US-4,697,127 |
Adaptive control technique for a dynamic system A controller for a voice coil motor driven disk file actuator is described. The device has an online adjustable gain characteristic for controlling movement of... |
| US-4,697,126 |
Control method for direct current motor A method of controlling a direct current motor operating in an essentially no torque, discontinuous current mode provides for delivering current pulses to the... |
| US-4,697,125 |
Method and apparatus for determining shaft position and for providing
commutation signals The invention provides a method and apparatus for determining the angular displacement of a rotating shaft, and for commutation of a brushless motor. At least... |
| US-4,697,124 |
Integral series parallel and power brake controller for a transit vehicle An integral series parallel changeover and power dynamic brake controller apparatus for a transit vehicle disclosed. The controller utilizes a single cam shaft... |
| US-4,697,123 |
Gas discharge panel Disclosed here is a panel structure for a large size display which utilizes the gas discharge panel called the surface discharge type panel. Among a pair of... |
| US-4,697,122 |
Slow acting photo lamp control A room lighting control system which controls the electrical power supplied to the artificial lighting in an area based on the ambient light available. A... |
| US-4,697,121 |
Low-pressure mercury vapor discharge lamp A low-pressure mercury vapor discharge lamp in which a rare gas and mercury are provided in an outer bulb, which in turn contains therein a plurality of bent... |
| US-4,697,120 |
Color display system with electrostatic convergence means A color display system includes a cathode-ray tube and yoke. The yoke is a non-converging type. The cathode-ray tube has en electron gun assembly for generating... |
| US-4,697,119 |
Color cathode ray tube having a non-spherical curved mask The shadow mask of a color cathode ray tube has a number of apertures in the effective area passed by electron beams to the phosphor screen formed in the inner... |
| US-4,697,118 |
Piezoelectric switch A switch is provided wherein a piezoelectric bimorph element is used to provide many separately controllable, closely spaced switchable contacts. The element... |
| US-4,697,117 |
Rotary ultrasonic motor A rotary ultrasonic motor equipped with an ultrasonic vibrator including an electrostrictive element which is polarized in the direction of its thickness and has... |
| US-4,697,116 |
Piezoelectric vibrator A piezoelectric vibrator comprises a mechanical vibrating member having, an aluminum layer formed on a surface of the vibrating member, and a piezoelectric... |
| US-4,697,115 |
Surface acoustic wave device A surface acoustic wave device includes a semiconductor substrate, a piezoelectric film disposed on the semiconductor substrate, at least one pair of comb-shaped... |
| US-4,697,114 |
Permanent-magnet rotor shrink-fit assembly A permanent magnet rotor assembly has a rotor shaft (11), and a plurality of yokes (12) extended along the axis of the rotor shaft at circumferential intervals... |
| US-4,697,113 |
Magnetically balanced and centered electromagnetic machine and cryogenic
refrigerator employing same A cryogenic refrigerator includes opposing pistons driven by linear electromagnetic machines. Magnetic elements on armatures reciprocate adjacent to first and... |
| US-4,697,112 |
Current-mirror type sense amplifier There is disclosed a sense amplifier characterized by comprising a pull-up circuit. The pull-up circuit comprises a first transistor arranged between the first... |
| US-4,697,111 |
Logic boatstrapping circuit having a feedforward kicker circuit An integrated logic circuit includes a push-pull amplifier stage, in which by means of a bootstrap circuit the potential at the gate of the "push" transistor is... |
| US-4,697,110 |
Fluctuation-free input buffer An input buffer for a semiconductor circuit is provided with a source follower circuit composed of a first FET whose gate electrode has an input connected... |
| US-4,697,109 |
Level converter circuit Herein disclosed is a circuit for converting the logic amplitude of an ECL by logically amplifying a TTL or CMOS so that no substantial dc current flows in the... |
| US-4,697,108 |
Complementary input circuit with nonlinear front end and partially
coupled latch A complementary input circuit with a nonlinear front end is used to transfer the state of an external input to the internal signal lines of an intetraged circuit... |
| US-4,697,107 |
Four-state I/O control circuit An I/O control circuit is provided which is of the type that receives two inputs such that four sets of input conditions to the circuit are defined. A first set... |
| US-4,697,106 |
Programmable memory circuit A programmable memory circuit adapted to access a memory comprises a decoder responsive to address input signals, an access line, a transfer gate connected... |
| US-4,697,105 |
CMOS programmable logic array A programmable logic array includes a dynamic AND plane, and an OR plane using clocked load devices. The high precharge voltage state in the AND plane places the... |
| US-4,697,104 |
Two stage decoder circuit using threshold logic to decode high-order
bits and diode-matrix logic to decode... A two-stage decoder circuit includes a first-stage decoder circuit, for decoding upper bits of an input signal, and a second-stage decoder circuit, which is... |
| US-4,697,103 |
Low power high current sinking TTL circuit A multi-terminal transistor circuit structure is described for TTL applications including current sinking and "pull-down" transistor circuit elements. A... |
| US-4,697,102 |
Bipolar logic circuit having two multi-emitter transistors with an
emitter of one connected to the collector of... A logic circuit is provided which includes a first multi-emitter transistor with its emitters coupled to a group of first input lines and a first transistor with... |
| US-4,697,101 |
Read/write control circuit A semiconductor integrated circuit which has a CMOS inverter formed of p- and n-channel MOSFETs, and a D-type n-channel MOSFET coupled at the gate to the output... |
| US-4,697,100 |
Deuterated L-arginine phosphate monohydrate The new crystal deuterated l-arginine phosphate monohydrate provides an excellent frequency conversion crystal for laser applications, especially in the one... |
| US-4,697,099 |
Open line detector circuit This describes an open detector circuit essentially composed of comparator circuits with their outputs coupled to each other and to an open collector driver... |
| US-4,697,098 |
Composite gate generator circuit for detecting valid data signals A gate generator useful for validating readout signals incorporates three channels, including differentiators and threshold comparators, and a logic circuit... |
| US-4,697,097 |
CMOS power-on detection circuit A CMOS power-on detection circuit is described in which a rising supply potential is utilized to charge a capacitor and the voltage on the capacitor is coupled... |
| US-4,697,096 |
High voltage solid state switch A high voltage switching circuit is provided for electrically coupling, or decoupling, a high voltage power supply to, or from, a load selectively in accordance... |
| US-4,697,095 |
Chip-on-chip semiconductor device having selectable terminal connections A circuit configuration in a chip for a semiconductor device based on so-called chip-on-chip technology. The chip has a selecting circuit which switches,... |
| US-4,697,094 |
System for interconnecting sensor and actuating devices A system for connecting sensor devices to actuating devices, the system substantially comprising a cable having a given number of signal conducting lines, a... |
| US-4,697,093 |
Testable, fault-tolerant power interface circuit for controlling plant
process equipment A power interface circuit periodically which receives test pulses to test the operation and connections thereof. Voltage and current sensors detect the result of... |
| US-4,697,092 |
Control system for electrically operated components of an automotive
vehicle An automotive vehicle has a horn which is mounted on the vehicle chassis. The horn is connected with the vehicle battery by a first conductor. A switch for the... |
| US-4,697,091 |
Slip detecting device for a prime mover A device for detecting when a driven apparatus has frozen and/or its prime mover coupling mechanism is slipping. The rotational speed of a voltage generating... |
| US-4,697,090 |
Starting system for an electrically-compensated constant speed drive Prior generating systems utilizing electrically-compensated constant speed drives (ECCSD) have typically required a separate starter motor for starting a prime... |
| US-4,697,089 |
Dual wavelength sensor which employs object as part of a corner reflector Two emitters, producing light at different wavelengths, and a single receiver provide an optical sensor useful for detecting the presence or position of objects... |
| US-4,697,088 |
Method of and apparatus for discriminating sharp edge transitions
produced during optical scanning of... A method of and apparatus for discriminating sharp edge transitions produced during optical scanning, as by a CCD or the like, of differently reflective regions... |
| US-4,697,087 |
Reverse dark field alignment system for scanning lithographic aligner An alignment apparatus wherein a wafer having a wafer target thereon and a reticle having a reticle target therethrough are aligned to each other. An alignment... |
| US-4,697,086 |
Apparatus for implanting ion microbeam An apparatus for implanting an ion microbeam consists of an ion source; a beam-focusing system which accelerates ions emitted from the ion source, focuses the... |
| US-4,697,085 |
Apparatus and method for producing ions A source of a beam of ions includes in a housing a cathode filament, an anode spaced from the cathode and housing an ion emission opening therethrough and an... |
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