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Match Document Document Title
9024616 Signaling circuit and method to detect zone status  
A bi-directional current limiter may be configured to receive an AC signal and bi-directionally limit the loop current to a predetermined current value. A first and second zone may be configured...
8957667 Electric current measuring apparatus  
An electric measuring apparatus is constructed in such a way as to include a signal processing circuit equipped with at least a polarized light separating unit, Faraday rotators, a light source, a...
8890508 Adaptive filters for fiber optic sensors  
Systems and methods related to optical current and voltage sensors and, more particularly, to filters for use in such sensors. A fiber optic current sensor comprising: a light source; a...
8829890 Optical voltage sensor  
A polarizing optical system (15, 16) is disposed perpendicular to an optical axis of incoming light from a light source (12), having the optical axis (12) as a center axis, and configured for...
8754633 Systems and method for laser voltage imaging state mapping  
An apparatus and method for laser probing of a DUT is disclosed. The system enables laser voltage imaging state mapping of devices within the DUT. A selected area of the DUT is illuminating a...
8749225 Apparatus and method of power measurement for pulsed terahertz quantum-cascade laser  
The present invention provides a power measurement apparatus and method for a pulsed terahertz quantum-cascade laser (THz QCL). The apparatus includes a light source part, a light path part, and a...
8581572 Photovoltaic test apparatus  
An apparatus for testing photovoltaic cells wherein an array of light sources are provided. The light sources can have a collimating lens. In addition, one or more feedback circuits can be...
8378661 Solar simulator  
A solar simulator which uses a honeycomb structure for providing highly collimated light for testing one or more photovoltaic cells.
8076925 Optical sensor assembly for installation on a current carrying cable  
An optical sensor assembly has a base unit, an optical current sensor, and a magnetic concentrator. The optical current sensor is mounted on the base unit and includes a polarized light input, a...
7391222 Deflector  
A deflector which enables to have a sufficient degree of freedom of designing and also to detect accurately a displacement angle of a movable plate can be provided. In order to accomplish this,...
6961672 Universal diagnostic platform for specimen analysis  
A universal diagnostic platform (UDP) is described which incorporates several measurement modules for testing a device under test (DUT). Users can switch between measurement modules without...
6952107 Optical electric field or voltage sensing system  
An electric field sensing system is characterized so that a signal processor may derive an output representative of an electric field intended to be measured, particularly established by high...
6504355 Device for measuring an electric current by Faraday effect  
A light beam output from a magneto-optical current transducer using the Faraday effect is divided into two output light beams. A first output light beam is applied, via an output polarizer, to a...
6456423 Silicon nanoparticle microcrystal nonlinear optical devices  
Harmonic incident radiation is obtained from a silicon nanoparticle microcrystal or microcrystal film. The preferred film comprises silicon nanoparticles, dimensioned on the order of one...
6452378 Probe for electro-optic sampling oscilloscope  
An electro-optic sampling probe is provided, capable of irradiating a plurality of excitation light beams on a plurality of light receiving portions mounted on an IC wafer which is an object for...
6411751 System and method for training an optical cross-connect comprising steerable switching elements  
Signal losses in an optical cross-connect having steerable switching elements for routing optical signals are substantially reduced by controllably and selectively training the steerable switching...
6316930 Direct current meter with passive input and galvanic insulation, particularly for high voltage  
There is described a direct current meter with passive input and galvanic insulation, particularly for high voltage. The direct current meter is made up of a passive input part and of an active...
6269317 Self-calibration of an oscilloscope using a square-wave test signal  
Self-calibration of a digitizer is carried out by using a square-wave test signal which is digitized by the digitizer, and temporal positions of the digitized values output by the digitizer are...
5966009 Electromagnetic actuator and manufacturing method therefor  
A portion of a torsion bar (6) for axially supporting a movable plate (5) of a planar electromagnetic actuator, is made conducting by diffusing boron therein in a high concentration. An external...
5818188 Noncontacting electric power transfer apparatus, noncontacting signal transfer apparatus, split-type mechanical apparatus employing these transfer apparatus, and a control method for controlling same  
A noncontacting power transfer apparatus, a noncontacting signal transfer apparatus, to be referred to below as a power coupler and a signal coupler, respectively, and a separate machine apparatus...
5767666 Planar type mirror galvanometer incorpotating a displacement detection function  
The present invention relates to a slim-type small size mirror galvanometer wherein the mirror displacement angle can be detected, made using semiconductor manufacturing techniques. Using...
5408253 Integrated galvanometer scanning device  
An integrated galvanometer scanning device controllably deflects a beam of light. The device has a planar silicon wafer substrate with front and rear surfaces, first and second longitudinal slots...
5130643 Method for determining the recombination rate of minority carriers at boundary surfaces between semiconductors and other substances  
For a two-stage measuring method, a respective cell having an electrode therein is applied to the front surface and to the rear surface of a semiconductor wafer, whereby only the cell as the rear...
5029275 Apparatus having floating magnet unit with light reflecting mirror for detecting and indicating to an observer the presence upon a person entering a public place of ferromagnetic material that may be put to harmful use  
A detector of ferromagnetic materials having a permanent magnet floating in a contaier and restrained under the influence of a soft ferrite mass spaced below it to rotatable movement about a...
4875006 Ultra-high-speed digital test system using electro-optic signal sampling  
A high-speed test system for semiconductor integrated circuits utilizes electro-optic sampling techniques to perform tests at data rates up to 1.2 Gb/s. The receiver portion of the tester has a...
4868495 Fiber optic  
A single mode optical fiber is used to detect electrical currents or magnetic fields from a source to a high degree of accuracy. Phase modulation of an optical beam is used to determine the...
4835460 Display device of the galvanometric or logometric type, including a control circuit in form of an integrated circuit chip  
The present invention relates to a display device with a winding and pivoting elements, of the galvanometric or logometric type. According to the invention the display device comprises, rigid with...
4659180 Method of mounting galvanometer and means for mounting same  
A metal mount of a galvanometer is secured to a plate made of an electrically conductive material via a thin insulating layer in electrically insulated relation to the plate. The thin insulating...
4560925 Mirror position sensor and associated pivot suspension for improved track selection in optical data disk system  
Disclosed is a laser recording arrangement including a pivotable mirror for redirecting the laser beam in a controlled scan mode plus an associated electro-optical position monitor for monitoring...
4421381 Mechanical vibrating element  
Herein disclosed is a mechanical vibrating element which can be used as a resonator made operative to resonate in a predetermined frequency, a filter having a frequency selecting property or an...
RE30806 Light deflection apparatus  
A deflection apparatus deflects a light beam in accordance with the characteristics of energizing signals to provide a trace of those signal characteristics on a display medium. The assembly...
4286212 Variable signal generator for galvanometer exhibiting hysteresis  
Switch means having a predetermined number of switch positions normally applies any selected one of the same predetermined number of separate control signals to a galvanometer in accordance with...
4203068 Vibrating coil assembly  
A vibrating coil assembly for mirror galavanometers, light-beam oscillographs and the like having a mirror and a moving coil suspended by taut wires or ribbons. The ends of the wires nearest the...
4185239 Super sharp and stable, extremely low power and minimal size optical null detector  
An optical null detector design achieves exceptional efficiency of light utilization with a minimum of components providing (1) extremely sharp null recognition, (2) superior long term stability,...
4044248 Method and apparatus for linearizing a mirror galvanometer  
Method and apparatus for linearizing the response of a mirror galvanometer or the like to a reference driving signal. An optical assembly transmits through a transmission grating a scanned light...
4034292 Direction sensitive opto-electronic pulse initiator for electrical meters  
An opto-electronic pulse initiator for producing meter data pulses from a meter having a rotating movement. A directionally oriented pattern containing at least two reflective surfaces is driven...
3994588 Detection of angular deflection  
A mirror is mounted on a torsion fiber and at right angles to the axis of a light emitting semi-conductor (diode) with front lens. Two silicon photo-detectors are symmetrically positioned to the...
3966327 Angular displacement measurement apparatus  
An apparatus for measuring small angular displacement of any object having an attached light reflective surface. A reflecting mirror is attached to the test object for receiving a light beam from...
3939412 Voltage measuring device for an encapsulated high-voltage switching installation  
A voltage measuring device for use with an encapsulated, high-voltage switching installation including an inner conductor within a grounded metallic outer tube. The measuring device includes means...
3924255 Explosion-proof type switch box with alarm device  
An explosion-proof type switch box with an alarm is disclosed. The box has a window opening and push buttons are provided. An ampere meter and a switch are arranged within the box adjacent the...
3891921 Liquid damped galvanometer  
This disclosure describes an improved high frequency liquid damped galvanometer. It differs from conventional galvanometers in that the damping tube that confines the damping liquid is of larger...
3878391 Radiometric pulse initiator having a reflective patterned drum  
An improved radiometric pulse initiator for three wire remote meter telemetry systems includes interchangeable reflective patterned drums provided with alternative preselectable numbers of...
3735258 ELECTRO-MECHANICAL DEFLECTOR FOR LIGHT BEAMS  
A specific galvanometer structure, designed to maximize the coil/mirror inertia torsional resonance and the inductance/inertia resonance, includes a galvanometer coil and a mirror integrally...
3733493 SOLID STATE RADIOMETRIC PULSE INITIATOR FOR REMOTE METER READING SYSTEMS  
A solid state radiometric pulse initiator for a remote meter reading system includes a sensing head having two combined source-pickup pairs mounted in a meter for initiating pulses in response to...
3693022 REGULATOR-METER UTILIZING A BEAM OF LIGHT FOR INDICATION AND REGULATION  
Regulator-meter apparatus includes signal-responsive meter mechanism for projecting a light spot onto a transparent screen such that the spot traverses the screen during signal-caused movement of...
3635541 PANEL-TYPE MULTICHANNEL INSTRUMENT  
A panel-type multichannel instrument comprises in each measuring channel identical measuring assemblies. These measuring assemblies comprise rotating mirrors capable of being rotated under the...
3622880 SHOCK RESISTANT REMOTELY CONTROLLED GALVANOMETER MOUNT  
New and improved means for mounting galvanometers in well logging recorders or the like are disclosed which include means, including a support bracket fixed relative to the recorder, a positioning...
3622871 OSCILLOGRAPH WITH ELECTRON BEAM TUNING INDICATOR TUBE  
In an oscillograph having a magic-band type electric beam tuning indicator tube and mechanically driven dissecting means passing thereover adapted to change the length of the displayed light band...
3603953 FIRE DETECTOR CIRCUIT  
A temperature detection circuit of the type including an electrical switch actuated by a temperature-detecting sensor at a predetermined critical temperature, and an electrical indicator in series...
3603877 LIGHT-CONTACT PHOTOSENSITIVE MEASURING INSTRUMENT WITH SCALE RANGE INDICATORS  
A light-contact measuring instrument comprising a movement with a rotatable mirror for directing a light beam through an optical system producing pointer beams, of which a major pointer beam is...

Matches 1 - 50 out of 107 1 2 3 >