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5724030 |
System monitoring reprogrammable implantable transponder
A passive transponder including an antenna for receiving an input signal and transmitting an output and a memory for storing the data received by the transponder from an interrogator. The...
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5712563 |
Steering torque sensor utilizing a displacement detector having a pulse power supply
A displacement detector for enabling a precise detection of a displaced quantity of the core. The displacement detector is provided with a displaceable core, a detecting coil the inductance of...
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5703576 |
Embeddable DC power supply for smart structure sensors
A smart structure comprising a rotatable shaft, and a sensor integrated with the shaft, a resonant detector circuit integrated with the structure for detecting a sensor output, and an external...
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5701121 |
Transducer and interrogator device
A transducer and interrogator device is disclosed in which the interrogator provides power and information to the transducer via a magnetic field. The transducer is a passive actuator device that...
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5679930 |
Position pointing device including a controller for an AC field emitter in accordance with a binary code
A position pointing device codes information corresponding to an operation expressed by a continuously variable parameter without using an A/D converter and transmits the coded information to a...
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5650778 |
Antenna for programming a transponder
An antenna for programming a transponder in a partially shielded housing includes a non-metal spindle having a slot therein. The slot is adapted to receive the shielded housing containing the...
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5629619 |
Noncontact distance-measuring system having at least one coil and method of noncontact distance measuring operating either on the basis of eddy currents or by inductance
A noncontact distance measuring system with a sensor (2) that draws on alternating current and has a measuring coil (1), an electronic supply/evaluation circuit (3) connected with the sensor (2),...
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5625352 |
Method and arrangement for transmitting data, signals and energy
A method and an arrangement are used for transmitting data, signals and/or energy from stationary parts in or on metal-forming machines, particularly presses and/or stamping machines, or the...
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5619192 |
Apparatus and method for reading utility meters
An electronic meter reader having a transmitter and antenna for inductively transmitting alternating current power in any selected one of a plurality of frequencies. The reader further includes a...
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5612684 |
Mass transit inductive data communication system
A transmitter circuit and a receiver circuit couple inductively to allow data communication between a mass transit vehicle farebox and an external computer. Data communication may be performed...
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5602540 |
Fluid gauging apparatus with inductive interrogation
A gauging apparatus for fluid containers such as fuel tanks includes a capacitance disposed in the container that changes value based on the volume of fluid in the container; a first antenna...
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5594431 |
Remote meter reading
A remote meter reading system, for example for domestic water meters, operates through an inductive coupling over two lines. A sinusoidal power signal is transmitted from a reader to the meter to...
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5583492 |
Method and apparatus for monitoring inside a manhole
Maintenance information is collected by a sensor on an electric power cable installed in a manhole. The information is transmitted to a radio transmitter which is positioned in a vicinity of a...
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5581248 |
Embeddable device for contactless interrogation of sensors for smart structures
Sensing device for a sensor embeddable in a structure comprising: an insulative substrate, a circuit pattern disposed on the substrate for interconnecting a plurality of electronic components, the...
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5574366 |
Proximity switch having a variable sensing resistor for maintaining a constant total resistance
A proximity switch for determining the approach of a metal object includes an oscillating circuit which has a coil and a capacitor, and which produces a high-frequency field at the poles of the...
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5574441 |
Mass transit inductive data communication system
A transmitter circuit and a receiver circuit couple inductively to allow data communication between a mass transit vehicle farebox and an external computer. Data communication may be performed...
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5572445 |
Industrial mobile process monitor system
An industrial mobile process monitoring system is described which provides a means by which a measurable atmospheric condition, such as temperature, can be measured in real time at a plurality of...
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5532686 |
Programmable transponder
A passive transponder has a power antenna which receives a power signal and a communication antennas which receives a communication signal. An information generating circuit creates a second...
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5523750 |
Transponder system for communicating through an RF barrier
RF communication through an RF barrier is facilitated by an RF field concentrating core that is lodged within an opening through the barrier and extends out from at least one side of the barrier....
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5524034 |
Automatic revolution counting and data transmission device
An automatic revolution counting and data transmission device for measuring full or partial revolutions of a shaft, processing, storing, and transmitting said revolutions and related data. An...
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5517190 |
Physical measurement from changes in reactance
An apparatus and method for center finding and physical proximity measurement, the apparatus including a reactance controlled signal source for producing a measurement signal having a measurement...
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5515041 |
Composite shaft monitoring system
A smart structure comprising a rotatable shaft, and a sensor integrated with the shaft, a resonant detector circuit integrated with the structure for detecting a sensor output, and an external...
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5498911 |
Apparatus for transmitting electric power and data in motor vehicles
In an apparatus for transmitting electric power and data between the vehicle side and the steering wheel side of a motor vehicle, a transformer is used, which comprises a stationary primary coil on...
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5497147 |
Differential variable reluctance transducer
The novel differential variable reluctance transducer and telemetry system is comprised of a ultra miniaturized device encased in stainless steel. The system contains a free sliding, magnetically...
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5495241 |
Method for reducing power loss in devices for contactless data and energy transfer, and apparatus for performing the method
In a method and apparatus for reducing power loss in devices for contactless data and energy transfer, a function unit is provided in a movable part which ascertains the value of the current loss...
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5493290 |
Signal processing system for absolute-value sensors having periodic structures, particularly for position and angle sensors
A signal processing arrangement for absolute-value sensors in which, within the periodic structure (3) a measurement surface which is divided into a plurality of measurement sections lies opposite...
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5491468 |
Identification system and method with passive tag
An identification system with a reading device having a single turn transmission coil for continuously radiating alternating energy. A portable tag receives via a magnetic coupling, the energy from...
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5491474 |
Telemetric transmitter unit
The invention relates to a telemetric transmitter unit, by means of which signals detected by one electrode or several electrodes connected to the transmitter are wirelessly transmittable to a...
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5486818 |
Wireless switch for a telemetric receiver
The invention relates to a wireless switch for a telemetric receiver in a pulse meter, comprising a switch (7) for detecting the intensity of a telemetric signal received in the telemetric receiver...
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5453685 |
Inductive position sensing device and apparatus with selectable winding configuration
A variable inductance device for indicating the position of one body relative to another includes primary and secondary windings which are mounted such that one is slidable over the other. The...
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5451939 |
Microprocessor controlled transmitter for connection to a sensor and a method of transferring digital signals to the microprocessor
A transmitter (1) is connected to a source of DC voltage via supply wires (55) and to a sensor (53) having definable characteristics for electrical measurement of a physical variable, the...
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5444373 |
Biomagnetometer with selectable pickup coil array
A biomagnetometer comprises an array of biomagnetic sensors, the array comprising a first plurality of magnetic field pickup coils, and a second plurality of detectors, each of which receives a...
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5437058 |
Wireless shipboard data coupler
The wireless shipboard data coupler allows transmission of data through steel ship bulkheads and submarine pressure hulls without the need for special wiring penetrations. Shipboard sensing data...
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5416475 |
Remote meter reading receptacle for pit lid mounting
A remote meter reading receptacle for pit lid mounting includes an annular, cup-shaped housing containing a ferrite coil and electronic circuit board. This housing is mounted within an outer shroud...
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5369375 |
Sinewave generating circuit and amplitude demodulator
An integrated circuit for driving a sensor includes an oscillator for providing a first clock signal synchronized to a periodic waveform supplied by an external source. A second clock signal in the...
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5353020 |
Arrangement for monitoring operating parameters of vehicle pneumatic tires mounted on wheel rims
An arrangement for monitoring operating parameters of vehicle pneumatic tires mounted on wheel rims is provided with sensors (58, 60) for selected operating parameters and with transmitting means...
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5351032 |
Power line detection system
A short-range, radio frequency (RF) transmitting-receiving system that provides both visual and audio warnings to the pilot of a helicopter or light aircraft of an up-coming power transmission line...
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5345231 |
Contactless inductive data-transmission system
A contactless inductive data transmission system provides bidirectional signal transfer between a sending-and-receiving station and one or more batteryless transponders. A high-frequency signal...
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5331319 |
Device for signalling the position of a mobile member
A device for signalling remotely the state of a device able to assume a plurality of discrete states comprises a circuit for producing inside a screened enclosure a direct current voltage free of...
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5329274 |
Apparatus for contactless data and energy transmission and method for operating such an apparatus
An apparatus for contactless data and energy transmission and includes a stationary part having device for transmitting and receiving data and device for generating energy. A movable part has a...
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5329276 |
Multidimensional signal input device
A device is provided which allows multidimensional information signals concerning coordinates, directions and the like of an object to be input to a CPU exactly as intended by an operator on a...
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5325046 |
Inductive wireless data connection
A system that allows inductive connectors to be electrically coupled without having to mechanical align the same. The connectors have a primary coil coupled to a secondary coil. The primary coil...
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5260651 |
Travel measuring system for measuring a position relationship of one body relative to another body
The travel measuring system serves to detect a control position of one body relative to another body. Disposed on one of the bodies is a coil and a structured material that influences the...
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5217011 |
Method and apparatus for transdermal communication
A transdermal communication apparatus and method is disclosed which utilizes a Hall Effect sensor to be implanted within a body and which acts to receive communication transmissions from an...
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5218343 |
Portable field-programmable detection microchip
A read/write device includes a transmitter for producing an RF signal and a modulator coupled to said transmitter for modulating the RF signal and, finally a data receiver for receiving RF data...
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5216364 |
Variable transformer position sensor
A linear position sensor includes coextensively positioned primary and secondary windings, each having an elongated core and a coil radially spaced around the core. A cyclically varying signal is...
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5214378 |
Homopolar inductive displacement sensor
Displacement along a linear or rotary path causes relative displacement of a pair of elements (101,102) that confront each other across the path. One element (101) provides a series of coil...
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5211539 |
Apparatus for indicating the pitch of turbofan blades
Apparatus indicates changes in blade pitch of variable pitch blades by detecting relative displacements of first and second members of a blade pitch actuator. The members are selectively displaced...
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5202838 |
Non-contact IC card
A non-contact IC card for receiving electrical power from and exchanging signals with a terminal device without contact has a power consuming circuit which consumes electrical power when the...
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5202628 |
Evaluating circuit for linearizing the output of differential-choke displacement transmitter
An evaluating circuit for linearizing the output signal of a differential-choke displacement transmitter has two inductive coils each supplied with an alternating voltage with constant frequency...
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