Quotables
"There is practically no chance communications space satellites will be used to provide better telephone, telegraph, television, or radio service inside the United States."
T. Craven, FCC Commissioner ; 1961
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 |
| 8089274 | Method for evaluating SOI wafer The present invention relates to a method for evaluating the SOI wafer in a method for evaluating an SOI wafer in which a sheet resistance of a buried diffusion layer of an SOI wafer that has at least an SOI layer on an insulator layer and has a buried diffusion lay... | 01/03/2012 |
| 8049494 | Flexible array probe for the inspection of a contoured surface with varying cross-sectional geometry A flexible array probe is disclosed suitable for use in the non-destructive testing and inspection of test pieces with varying cross-sectional geometries. Array elements—such as, but not limited to, eddy current sensors, piezoelectric sensor elements, and magnetic... | 11/01/2011 |
| 7911205 | Electromagnetic resonance frequency inspection systems and methods A method of inspecting a test part is provided. The method includes positioning a coil on a surface of the test part and exciting the coil at a resonance frequency. The method also includes determining at least one of a resonance frequency shift and a quality factor... | 03/22/2011 |
| 7830140 | Eddy current system and method for estimating material properties of parts A method of inspecting a test part is provided. The method includes positioning an eddy current probe on a surface of the test part and scanning the test part using the eddy current probe to generate a first signal corresponding to a no lift-off condition of the tes... | 11/09/2010 |
| 7795863 | Method and apparatus for forming coil for use in eddy current sensing probe A coil for use in an eddy current sensing probe is formed through depositing film traces. The film traces can be directly deposited. The film traces can be deposited on the outer surface of a core or on ends of the core. The film traces can be deposited onto non-pla... | 09/14/2010 |
| 7403001 | Methods and apparatus for measuring morphology of a conductive film on a substrate A method of determining a mass variation of a conductive film on a substrate with an area, an edge zone, and a center zone, is disclosed. The method includes providing a measured conductive film mass of a conductive film on a substrate. The method also includes posi... | 07/22/2008 |
| 7301335 | Apparatus and method for eddy-current magnetic scanning a surface to detect sub-surface cracks around a boundary An RFEC excitation unit and sensor apparatus and method that facilitate detection of cracks or other anomalies within or under a surface and immediately next to an expected structure (such as a rivet) that would otherwise cause a signal change preventing detection o... | 11/27/2007 |
| 7299150 | Ultrasonic flow meter In an ultrasonic flow meter for measuring a flow rate of a fluid flowing through a conduit by detecting a propagating time difference between a forward propagating time of an ultrasonic wave propagating within the conduit in a forward direction and a backward propag... | 11/20/2007 |
| 7288941 | Method and apparatus for measuring conductivity of powder materials using eddy currents A method and related apparatus for non-contact measurement of electrical conductivity of powder-like materials using eddy currents includes the steps of placing a powder to be measured in a hollow dielectric sampling container, the sampling container disposed and fr... | 10/30/2007 |
| 7289913 | Local feature characterization using quasistatic electromagnetic sensors Local features such as cracks in materials are nondestructively characterized by measuring a response with an electromagnetic sensor and converting this response into a selected property using a database. The database is generated prior to data acquisition by using ... | 10/30/2007 |
| 7276914 | System and method for guided TDR/TDT computerized tomography A system for detecting a defect or discontinuity in media or at an interface of the media includes a signal generator; a transmission path coupled to the signal generator, wherein the transmission path is arranged along or through the media; a detection circuit for ... | 10/02/2007 |
| 7267020 | Apparatus for structural testing An inspection device for performing nondestructive testing on a test subject includes a manually controlled inspection cart. The inspection device also includes a nondestructive testing platform and a computer coupled to the inspection cart. The computer is operable... | 09/11/2007 |
| 7256576 | ID-OD discrimination sensor A sensor body for use in a pig for determining characteristics of a pipeline wall though which the pig passes includes a circuit board and a single coil wrapped around the circuit board. A microcontroller is mounted to the circuit board and connected to the single c... | 08/14/2007 |
| 7256577 | High frequency rotary eddy current probe device An eddy current detection system configured in accordance with an example embodiment of the invention employs a high frequency rotary eddy current probe that is capable of detecting very shallow surface imperfections, including imperfections originating at scribe li... | 08/14/2007 |
| 7209839 | Real time power flow method for distribution system A method for determining a power flow in a distribution network includes the step of determining an admittance matrix for a circuit that includes a floating transformer in an electrical power distribution system. The admittance matrix includes an admittance of a fic... | 04/24/2007 |
| 7110897 | Identification of average total loss and switching loss in duty cycle and/or frequency variation signals acquired across a switching device using a DSO The subject apparatus and method measures the Total Average Power Loss and isolates the different power loss components of Total Average Loss such as Ton Loss and Toff loss at switching devices such as, MOSFETs, BJTs and IGBTs that may be used ... | 09/19/2006 |
| 6987390 | Method for testing a transformer and corresponding test device Testing a transformer by applying to the transformer a test signal, the frequency of which may be lower than the nominal frequency of the transformer. The voltage of the test signal may also be lower than the nominal voltage of the transformer. A number of frequency... | 01/17/2006 |
| 6975108 | Methods and devices for eddy current PCB inspection A non-contact printed circuit board (PCB) electromagnetic testing system comprises at least one high resolution transducer operative to induce multi-frequency, multi-amplitude eddy currents in a tested PCB, each such transducer including both a high frequency excita... | 12/13/2005 |
| 6851541 | Discriminator for bimetallic coins A coin discriminator has a coin path along which a coin, containing a first portion and a second portion made of different metals and/or metal alloys, is arranged to pass. An electrical mechanism supplies time-varying drive signals to the coil mechanism. A detection... | 02/08/2005 |
| 6850077 | Method for measuring a characteristic of a conductive target material using a proximity probe A digital eddy current proximity system including a digital impedance measuring device for digitally measuring the proximity probes impedance correlative to displacement motion and position of a metallic target object being monitored. The system further including a ... | 02/01/2005 |
| 6832179 | Evaluating a vortex flow-meter signal A signal processor, for use with a zero crossing module of a vortex flow meter, includes a peak amplitude detector, a comparator, and a filter module. The filter module is enabled when the comparator determines that the amplitude is less than a low flow rate thresho... | 12/14/2004 |
| 6552536 | Reference standard for inspection of dual-layered coatings A reference standard and method for inspecting dual-layered coatings. The reference standard has a first layer adherent to a substrate, the first layer has a predetermined thickness that increases in one direction. Adherent to the first layer is a second ... | 04/22/2003 |
| 6526114 | Remote automated nuclear reactor jet pump diffuser inspection tool An inspection apparatus for inspecting welds in a nuclear reactor jet pump includes a probe subassembly rotatably and linearly movably coupled to a frame structure configured to attach to a top flange of the reactor pressure vessel. The probe subassembly ... | 02/25/2003 |
| 6462538 | Eddy current detection type thin film electrical resistance meter The sheet resistance meter has: a coil which produces a magnetic field; a sensor head provided to enable the magnetic field to induce eddy currents in a thin film formed on a substrate so that the lines of a magnetic force exerted by the magnetic field ex... | 10/08/2002 |
| 6100685 | High frequency measuring system for magnetic properties of materials A high frequency magnetic properties measuring system is used for measurement of high frequency magnetic properties, for example high frequency core-loss and magnetic hysteresis curve (coercivity force, magnetic flux density, permeability) in soft magneti... | 08/08/2000 |
| 5479099 | Magnetic inspection head suited for contoured or irregular surfaces A magnetic inspection head adapted for use with samples having non-planar surfaces. A magnetically permeable core has a pair of poles joined by a magnetically permeable bridge to form a closed magnetic circuit between the pole legs, bridge and the test ma... | 12/26/1995 |
| 5287056 | Surface magnetometer with modulated flux gate section A method and apparatus are disclosed for measuring the magnetic properties of magnetic materials by generating flux lines through a balanced magnetic core and through a magnetic sample placed adjacent to the core. Increased sensitivity is accomplished thr... | 02/15/1994 |
| 5215603 | Method of primary recrystallization annealing grain-oriented electrical steel strip A method of primary recrystallization annealing grain-oriented electrical steel strip comprises the steps of conducting online measurement of the primary recrystallization grain diameter of the steel after primary recrystallization annealing and, based on... | 06/01/1993 |
| 5193395 | Method and apparatus for determination of material residual stress A device for the determination of residual stress in a material sample consisting of a sensor coil, adjacent the material sample, whose resistance varies according to the amount of stress within the material sample, a mechanical push-pull machine for impa... | 03/16/1993 |
| 5103173 | Permeameter having a differential transformer probe with a reduced distance between the detecting coils Permeameter suited for measuring permeability of a small, non-magnetic (i.e., the permeability value is close to 1) object. The probe of the permeameter is of the differential transformer type with an exciting coil and two detecting coils placed at both e... | 04/07/1992 |
| 5059905 | Indication of cutting tool wear by monitoring eddy currents induced in a metallic workpiece A tool dullness indicator and method comprising the measurement of eddy currents at a known, controlled frequency directly in the tool by measuring the phase angle shift in a coil when a sample is put into or next to the coil. The phase angle change cause... | 10/22/1991 |
| 4827214 | Method for measuring losses of a magnetic core A novel method and system for measuring AC magnetic characteristics is disclosed, in which the loss of a magnetic core is measured by defining the change rate of magnetic flux density, and for this purpose, the duration of a voltage induced in the coil of... | 05/02/1989 |
| 4820981 | Method and apparatus for measuring magnetic losses in ferromagnetic materials based on temperature modulation measurements The invention is concerned with a method and apparatus for measuring magnetic losses in a ferromagnetic material specimen. According to the invention, an alternating magnetic field having a predetermined frequency and an amplitude which is modulated at a ... | 04/11/1989 |
| 4733190 | NMR local coil with adjustable spacing A local coil assembly for use in NMR imaging includes a base which supports a pair of spaced local coil modules. The size and separation of the local coil modules can be changed without affecting the resonant frequency of the assembly. Each local coil mod... | 03/22/1988 |
| 4604574 | Rotating probe indicating the angle of intersection with a surface The relative orientation of a probe and a surface is maintained by positioning a proximity sensor off-axis on the probe, rotating the probe, and using the signal from the probe to adjust the relative orientation in a feedback loop.... | 08/05/1986 |
| 4598260 | Eddy current proximeter An inductive sine wave oscillator circuit for an eddy current proximeter. The oscillator circuit includes an operational amplifier and a coil. The frequency and amplitude of the output signal produced by the circuit varies with and is controlled by the in... | 07/01/1986 |
| 4573012 | Method and apparatus for measuring core loss of a laminated ferromagnetic structure A core loss tester employs separate cables for excitation and pickup. Testing is performed at a fixed flux density in the ferromagnetic core. A processing circuit on the output of the pickup coil scales the voltage developed so that, when excitation curre... | 02/25/1986 |
| 4394193 | Method and device for the continuous, contactless monitoring of the structure state of cold strip Internal structure of a metal strip is monitored by applying cyclically varying magnetic flux to the strip and sensing the flux induced in the strip. Signals corresponding to the magnetic field intensity of the applied cyclically varying field and to the ... | 07/19/1983 |
| 4353029 | Self inverting gauging system A self inverting gauging system for such parameters as capacitively sensed distance or inductively sensed resistivity in which the sensor provides an output inversely varying with the dimension of interest. The gauge typically includes a dual slope integr... | 10/05/1982 |
| 4331919 | Apparatus for magnetic testing ferromagnetic sheet or strip material using rectangular coils Apparatus for magnetic testing of sheet or strip includes a magnetizing system comprising spaced arrays of substantially parallel rectilinear conductors supported adjacent the plane of sheet or strip to be tested, the conductors being connected to carry m... | 05/25/1982 |
