Bizarre Patents
A new toilet tank assembly aquarium for housing aquatic creatures.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5479106 | Electro-optic voltage detector To provide an E-O probe which can measure a voltage distribution in a fine region while enlarging it. A grounded, transparent electrode 2 and an electrooptic member 3 such as LiTaO3 are successively fixed to and below a support 1. There are a p... | 12/26/1995 |
| 5477134 | Voltage sensor for use in optical power transformer including a pair of Pockels cells A voltage sensor is composed by arranging along the optic axis, successively from the side of incident light, a first polarizer, a Pockels cell for detection, a Pockels cell for modulation, and a second polarizer wherein an electric field proportional to ... | 12/19/1995 |
| 5475298 | Method and apparatus for measurements dependent on the faraday effect using polarized counter-propagating light Measurements, particularly of current, using the Faraday magneto-optic effect in an optical fibre, have suffered from inaccuracy due to vibration causing linear birefringence in the fibre. Current measurement according to the method and apparatus employs ... | 12/12/1995 |
| 5475300 | Variable color digital multimeter A measuring instrument comprises a DC section for processing DC signals, an AC section for processing AC signals, and an OHMS sections for performing resistance measurements. A first switch is provided for selectively activating one of the three measureme... | 12/12/1995 |
| 5465043 | Non-contact type probe and non-contact type voltage measuring apparatus, wherein the probe's irradiation surface is coated with a conductive film having a pinhole To enable the measurement of the absolute voltage of the wiring under test with no cross-talk and without depending on the gap interval between the probe tip and-the wiring under test. [Construction of the Invention] The voltage of the conductive films 22 to 2... | 11/07/1995 |
| 5463311 | Apparatus and method for measuring operating voltage electrical signals in a high voltage environment A test system 100 for performing electrical testing in a high voltage or inhospitable or inconvenient environment 150 electrically isolates a measurement detector 130 located within the environment from an externally located measurement result display and... | 10/31/1995 |
| 5463312 | Faraday-effect sensing coil with stable birefringence A fiber optic, Faraday-effect sensing coil has very low linear and circular birefringence, which remains stable over a wide range of temperatures. The coil is fabricated from a spun fiber having an effective linear beat length of 100 meters or more, and i... | 10/31/1995 |
| 5461307 | Electro-optical current sensing system and method for sensing and avoiding thermally induced measurement error therein An electro-optics current sensing system for sensing and avoiding thermally induced measurement errors in a current sensor includes a beam generator, such as a light emitting diode or a laser diode, thermally coupled to the current sensor for encoding int... | 10/24/1995 |
| 5459394 | Electro-optic measurement device for the measurement of an electric signal in an electronic component An electro-optical measurement device for the sampling of an electric signal (SI) in an electronic component by means of a radiation beam. Special embodiments of the electro-optic measurement device are described. An electro-optic sensor element is provid... | 10/17/1995 |
| 5451864 | Magneto-optical sensor An optical sensor includes: a light irradiation source for irradiating linearly polarized light having a wavelength of 740 to 890 nm; a magneto-optical element having a composition of Y3-x Tbx Fe5 O12 (0.3ࣘ×à... | 09/19/1995 |
| 5451863 | Fiber optic probe with a magneto-optic film on an end surface for detecting a current in an integrated circuit An apparatus and method for measuring the current distribution in an integrated circuit with high time resolution is described incorporating a magneto-optic film, a linearly polarized light beam and a means for measuring the magneto-optic polarization rot... | 09/19/1995 |
| 5450006 | Apparatus and methods for measuring magnetic fields and electric currents Apparatus for sensing or measuring a magnetic field comprises a light source (10) for generating light having at least a component which is polarized, a sensing element (16) arranged to transmit light from the source and comprising material having a subst... | 09/12/1995 |
| 5448161 | Transformer-coupled photodiode circuit for lightning and other light pulse detection An efficient optical radiation detector for lightning or other light signals such as pulses, bursts, flashes, and steady fluctuations. A silicon photodiode (or similar light-sensitive silicon device) is arranged to receive light signals (infrared, visible... | 09/05/1995 |
| 5446381 | Optical voltage electric field sensor An optical voltage electric field sensor of the type which includes a light source, a polarizer for linearly polarizing an incident light beam emanated from the light source, a phase plate for applying a phase difference to the linearly polarized light be... | 08/29/1995 |
| 5442297 | Contactless sheet resistance measurement method and apparatus A contactless sheet resistance measurement apparatus and a method for measuring the sheet resistance of a desired layer of a first conductivity type, formed upon a substrate of an opposite conductivity type, is disclosed. The apparatus comprises a junctio... | 08/15/1995 |
| 5442300 | Ultrafast electrical scanning force microscope probe An ultrafast scanning probe with 2.5-picosecond response time and 10-nanometer spatial resolution. In one embodiment, a single probe tip is formed on an input electrode layer which is at least partially formed on a cantilever portion of the probe. The can... | 08/15/1995 |
| 5442281 | Method and apparatus for deriving power consumption information from the angular motion of a rotating disk in a watt hour meter An apparatus for recording information about the angular motion of a rotatable disk disposed in a first structure is provided. The disk has regions with differing properties with respect to electromagnetic energy. The apparatus includes first means for em... | 08/15/1995 |
| 5434698 | Potential sensor employing electrooptic crystal and potential measuring method A high-resistance compound semiconductor 12 is epitaxially grown on a low-resistance compound semiconductor 11 and a dielectric reflecting film 13 is formed thereon, thereby forming a monolithic sensor 10. As the low-resistance compound semiconductor 11, ... | 07/18/1995 |
| 5434501 | Polarization insensitive current and magnetic field optic sensor A sensor system includes a sensor head, an optical source, and a measurement apparatus. The sensor head includes a beamsplitter having first, second, third, and fourth ports, the beamsplitter being responsive to light selectively applied to the first, sec... | 07/18/1995 |
| 5420413 | Actuator with an optical position sensor using a variable magnetic field An actuator having an optical position sensor is disclosed. The sensor remotely provides via a single optic fiber light having two spectral frequencies of about equal intensities to two inversely acting linear optical attenuators that attenuate light in r... | 05/30/1995 |
| 5420502 | Fault indicator with optically-isolated remote readout circuit A fault indicator for indicating at local and remote locations the occurrence of a fault current in a conductor of an AC power distribution system utilizes a liquid crystal display having independent "F" and "N" optical display and shutter elements. Upon ... | 05/30/1995 |
| 5420715 | RF/optical modulator-demodulator A modulator or demodulator has a transparent nonlinear dielectric material (crystal), and an optical fiber for coupling light thereinto. RF is coupled into the crystal by a dielectric waveguide which is matched to the crystal. The nonlinear crystal causes... | 05/30/1995 |
| 5416860 | Method and apparatus for optically measuring electric current and/or magnetic field with temperature compensation A system for measuring the strength of fiber optical current in an AC magnetic field by adopting Faraday effect and temperature compensation. In general, the current measurement systems that adopt Faraday effect have the structure including a Faraday elem... | 05/16/1995 |
| 5414374 | Method for particle beam testing of substrates for liquid crystal displays (LCD) Method for particle beam testing of substrates for liquid crystal displays (LCD). This is directed to methods wherein, given a substrate (SUB1) for a liquid crystal display, either potentials or, respectively, currents are set in defined fashion with a pa... | 05/09/1995 |
| 5412330 | Optical module for an optically based measurement system An optical module for an optically based measurement system, such as an electro-optic system (10) for measuring electrical characteristics of a device under test (14), has a probe arm (26), a layer of electro-optic material (27), and a first optical syste... | 05/02/1995 |
| 5412328 | Non-contact current injection apparatus and method for use with linear bipolar circuits The present invention relates to a non-contact current injection apparatus and a method for using the same with linear integrated bipolar circuits. The current injection apparatus has two modes: a calibration mode and an injection mode. The apparatus incl... | 05/02/1995 |
| 5410246 | Method for detection of a marked element in proximity to a sensor A method for detecting a marked element on an eddy wheel in proximity to a sensor is described. The method includes the steps of accumulating sensor output signals over a selected time period. The number of sensor output signal over a first and second tim... | 04/25/1995 |
| 5410243 | Three-phase collected type optical current transformer A three-phase collected type optical current transformer having a common hermetically sealed container miniaturized in its radial direction. The common hermetically sealed container incorporating central conductors and optical current transformers corresp... | 04/25/1995 |
| 5406195 | Phase-to-phase voltage monitor for three-phase power distribution system A voltage monitoring device for a three-phase ungrounded delta-connected power system utilizes liquid crystal optical shutter devices capacitively coupled between phases of the system such that the combined light transparency of the optical shutter device... | 04/11/1995 |
| 5406194 | Alx Ga1-x as probe for use in electro-optic sampling A new electro-optic sampling probe with femtosecond resolution suitable for ultra-fast electro-optic sampling. The new probe is several times thinner and has a dielectric constant four times less than the best reported conventional bulk LiTaO3 ... | 04/11/1995 |
| 5406213 | Instrument for testing liquid crystal display base plates An instrument for testing defects on active matrix liquid crystal display base plates used for liquid crystal display panels. The instrument includes a testing device having an electro-optical element and active matrix liquid crystal display base plate, a... | 04/11/1995 |
| 5399853 | Optical sensor arrangement using dual mode devices A proximity detector apparatus that uses the Faraday Effect to detect position changes of a target. The proximity detector includes a permanent magnet having a magnetic field that changes as the target moves to or from a predetermined position. A self-ref... | 03/21/1995 |
| 5396166 | Fiber optic interferometric electric field and voltage sensor utilizing an electrostrictive transducer A fiber optic interferometer sensor system utilizing a fiber optic interferometer with an elecrostrictive transducer bonded to one of first and second optical fiber arms of the interferometer for obtaining excellent low frequency voltage detectors and ele... | 03/07/1995 |
| 5394098 | Apparatus including electro-optical material for use in testing a circuit having voltage-bearing elements proximate a surface of a body Electro-optical in-circuit testing, especially of large circuits such as those assembled on printed circuit boards, is achieved in an automatic test system by disposing an electro-optical sensor in proximity to the circuit conductors, applying test signal... | 02/28/1995 |
| 5389782 | Optically powered amplifier used by an electromagnetic field sensor to amplify an electrical signal from an antenna An electromagnetic field sensing apparatus which detects an incoming electromagnetic field and provides an RF electrical signal indicative of the strength of the field. The electromagnetic field sensing apparatus includes a metallic antenna which intercep... | 02/14/1995 |
| 5384534 | Self-powered electro-optic rotational position sensor with magnetic pickup An indicating system for measuring movement of a material, having a magnetic pickup device, waveform conditioning circuit and light signal emitter functioning under the system's own self-made power, having a light waveguide or optic fiber connecting the l... | 01/24/1995 |
| 5382901 | Optical magnetic field sensor capable of precise measurement without temperature induced errors An optical magnetic field sensor is provided that can precisely measure a magnetic field strength without measuremental errors caused by temperature change. The sensor includes a light source, a polarizer, a Faraday's element, an analyzer, a first light b... | 01/17/1995 |
| 5371459 | Method for particle beam testing of substrates for liquid crystal displays using parasitic currents Method for particle beam testing of substrates for liquid crystal displays (LCD). This is directed to methods wherein, given a substrate (SUB1) for a liquid crystal display, either potentials or, respectively, currents are set in defined fashion with a pa... | 12/06/1994 |
| 5365175 | Method of locating ground faults The present invention discloses a method of detecting and locating current imbalances such as ground faults in multiwire systems using the Faraday effect. As an example, for 2-wire or 3-wire (1 ground wire) electrical systems, light is transmitted along a... | 11/15/1994 |
| 5363037 | Method and apparatus for testing LCD panel array A hierarchical testing method is implemented taking advantage of the nature of the most common defects in an LCD panel to achieve fast effective parametric testing of LCD panels and the like. At the first hierarchy of testing, the panel is logically divid... | 11/08/1994 |
