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| Number | Title | Issue Date |
| 6222371 | Hand-held fluid tester for process fluids A portable, hand-held fluid tester for testing and analyzing process fluids is provided with a volume controlled fluid reservoir. The test fluid reservoir is connected by a spillway to an overflow reservoir to provide more consistent and accurate fluid vo... | 04/24/2001 |
| 6147481 | Termination for RF circuit which senses changes in power and which is not temperature sensitive A circuit for determining power changes in an RF circuit includes first and second temperature sensitive resistors connected in parallel with an RF input terminal so as to have a common junction therewith. The first resistor has a positive temperature coe... | 11/14/2000 |
| 6144209 | Fluid detection cable An elongated fluid detection cable is described for use in detecting the presence of fluid (e.g. water) in areas where fluid is not desired. The cable includes a non-conductive base and at least two conductive members (such as wires). The base is twisted ... | 11/07/2000 |
| 6118285 | Non-contact plasma probe for testing electrical continuity of printed wire boards A system for testing the electrical conductivity of printed traces, on multiple surfaces, of a printed wiring board using non-contacting probes. The non-contact probes generate a plasma in a plasma generating chamber that is used to apply a voltage to the... | 09/12/2000 |
| 6118270 | Apparatus for fast measurements of current and power with scaleable wand-like sensor A device for non-contact, non-invasive measurement of current or power in a wire, cable or conductor includes a small coil having multiple turns and no ferromagnetic core. The coil may be secured to a wand or housing adapted to be used to place the coil i... | 09/12/2000 |
| 6114861 | Apparatus for and method of evaluating the polarization characteristic of a ferroelectric capacitor Described herein is an apparatus for evaluating the polarization characteristic of a ferroelectric capacitor. The apparatus includes a ferroelectric capacitor, a first pulse generator, a second pulse generator, a reference capacitor of a known capacitance... | 09/05/2000 |
| 6111415 | Device and method for determining the moisture content of a bulk material A method and system for measuring the moisture content and internal structure of a material which is either packaged as a module or presented in a continues bulk flow. A frequency modulated digital pulse of very high frequency microwaves is directed throu... | 08/29/2000 |
| 6107802 | Battery pack with monitoring function utilizing association with a battery charging system A battery charging system is provided which is comprised of a battery pack (30) and a charging system (20). The battery pack (30) includes a battery (10) and a battery capacity detect circuit (32). The battery capacity detect circuit (32) is interfaced wi... | 08/22/2000 |
| 6094055 | Calibrated high power radio frequency step attenuator A high power radio frequency (RF) precision step attenuator includes a trim attenuator, a multi-step attenuator and a calibration/control circuit. The control circuit includes a memory for storing attenuator specific calibration data. The calibration data... | 07/25/2000 |
| 6091248 | Method for measuring the electrical potential in a semiconductor element Measuring an electrical potential in a semiconductor element by applying one or more voltages over the semiconductor element, placing at least one conductor in contact with the semi-conductor element using a scanning proximity microscope while injecting a... | 07/18/2000 |
| 6087836 | Apparatus for and method of monitoring the status of the insulation on the wire in a winding An apparatus for monitoring the status of the insulation on the wire in a winding in a device comprises a surrogate sample of insulating material having a thickness and properties selected to fail before the failure of the insulation on the wires in the w... | 07/11/2000 |
| 6084394 | Electronic measuring device using a correction factor to compensate for measuring errors An electronic measuring device achieves an improvement in measurement accuracy while at the same time compensating for influences on the measurements, by providing for a correction factor to be stored in a correction element when the measuring device is f... | 07/04/2000 |
| 6084392 | Electrode assembly An electrode assembly (1) for resistive pulse spectroscopy comprises two flat electrodes (3) substantially equal in size and shape and supported in face-to-face, parallel relationship to one another, and a plate-like fluid-tight insulator (2) positioned b... | 07/04/2000 |
| 6084414 | Testing for leakage currents in planar lambda probes A method for testing for leakage currents in an oxygen probe, in particular a planar lambda probe, having at least one heating element, one external electrode and one internal electrode, and a solid electrolyte arranged between the electrodes, a first vol... | 07/04/2000 |
| 6081121 | Ionization gauge and method of using and calibrating same Controller circuitry and method for controlling the operation of an ionization gauge having a source of electrons, an anode, an ion collector electrode. Circuitry is provided (a) for providing an electron emission current from the electron source (b) for ... | 06/27/2000 |
| 6078180 | Monitoring partial discharges A method of initiating and monitoring partial discharges in an insulating medium is disclosed. Apparatus for performing the method is also disclosed. A relatively low frequency time varying exciting waveform is applied to a sample of an insulating medium.... | 06/20/2000 |
| 6075367 | Differential conductivity hemodynamic monitor A flow rate of a fluid flowing in a tube is quantitatively determined by altering the electrical conductivity of the fluid by injection of a bolus of saline. The electrical conductivity of the altered conductivity is measured over the time it takes the al... | 06/13/2000 |
| 6075371 | Linear position sensor A linear position sensor has first and second output signal generators each of which outputs an output signal in accordance with the position of a detection object. As the detection object moves from an initial position, the output signal of the first out... | 06/13/2000 |
| 6066957 | Floating spring probe wireless test fixture A test fixture for a printed circuit board having a pattern of test probes and a fixed probe plate and a top plate adapted for movement toward and away from the probe plate. The probe plate and the top plate have selected patterns of holes for passage of ... | 05/23/2000 |
| 6064211 | Spark plug tester A tester for testing the spark plugs, distributor system, and wires used on combustion engines. The tester includes a housing that has an opening therethrough adapted and dimensioned for receiving a spark plug therethrough. The housing has at least one op... | 05/16/2000 |
| 6060892 | Probe card attaching mechanism A probe card attaching mechanism fits a probe card to a prober that checks electric characteristics of an object to be tested (e.g., an integrated circuit formed on a semiconductor wafer). The probe card has measurement contactors which are to be brought ... | 05/09/2000 |
| 6060877 | Flat cathodic protection test probe A flat cathodic protection test probe comprises a non-metallic probe body (20) with a mounted metal coupon (18) simulating a large coating holiday on a pipeline, an insulated wire(s) (22) attached to the coupon for an electrical connection to the pipeline... | 05/09/2000 |
| 6057699 | Built-in frequency test circuit for testing the frequency of the output of a frequency generating circuit A frequency test circuit (200) includes a built-in self test (BIST) circuit (212) which provides for testing of a frequency generating circuit such as an oscillator circuit (100). The test circuit (200) includes circuit stages (202-208) which help produce... | 05/02/2000 |
| 6057695 | Method and apparatus for automated docking of a test head to a device handler A positioner facilitates docking and undocking of an electronic test head with a device handler. The positioner provides for rotation of the test head about a first axis. The positioner includes a support structure for moving the test head along a second ... | 05/02/2000 |
| 6057689 | Apparatus and method for leak detection in a fluid-filled balloon useful to treat body tissue An apparatus for detecting leaks in a fluid-filled device used to treat a patient's tissue includes an catheter having an expandable device defining a fluid reservoir about the distal end of the catheter. An internal electrode is in electrical contact wit... | 05/02/2000 |
| 6054848 | Method and apparatus for detecting electromagnetic waves A detector facilitates visualization of electromagnetic radiation, including radio frequency radiation. The electromagnetic radiation is converted to thermal energy by partial absorption of the radiation, and is made visually observable by coupling the pa... | 04/25/2000 |
| 6054867 | Method for stabilizing feedback loop of impedance measuring apparatus A method for stabilizing feedback loop in impedance measuring equipment involves determining a null loop transfer function of the impedance measuring device by utilizing multiple independent, known impedances. The phase characteristics of the null loop is... | 04/25/2000 |
| 6054864 | In-circuit capacitor checker A capacitor test apparatus for checking the capacitance of a capacitor without removing the capacitor from the circuit. Selection of the designated capacitance of the capacitor by means of a user-actuated selector switch automatically selects a test signa... | 04/25/2000 |
| 6054865 | Multiple function electrical safety compliance analyzer A safety compliance test instrument includes circuitry for performing insulation resistance and ground circuit tests such as a ground bond test, as well as high voltage AC and DC dielectric withstand or hipot tests. A micro-processor based controller prov... | 04/25/2000 |
| 6051979 | System and method for detecting shorts, opens and connected pins on a printed circuit board using automatic test equipment A method for testing node interconnection on a circuit board. The method utilizes an automated test system having at least one test channel, wherein each test channel has a digital driver with a first input and a first output, and a digital receiver with ... | 04/18/2000 |
| 6051968 | Test board provided with a capacitor charging circuit and related test method A test board is provided to reduce the test time for integrated circuits required by the necessity to stabilize bias voltages applied to IC devices. The test board includes a capacitor connected to specific input terminals of the IC device and a capacitor... | 04/18/2000 |
| 6051977 | Method and apparatus for locating coating faults on buried pipelines A coating fault locating technique transmits a base electric signal from a power source to a buried metal pipe. A location of a coating fault in the buried pipe is detected by detecting a gradient of a changing magnetic field between two points spaced alo... | 04/18/2000 |
| 6049211 | Method and apparatus for determination of fiber orientation in paper or paperboard web A method and apparatus for determination of orientation of fibers in a material such as a paper or paperboard web comprised of elongated fibers of high moisture content. The material is subjected to an alternating electric field (E) of the RF or microwave... | 04/11/2000 |
| 6049210 | Device for displaying remaining battery capacity A device for displaying the remaining capacity of a rechargeable battery is provided. The device includes a current sensing resistor connected between an external power source and the rechargeable battery, for sensing the charge current and the discharge ... | 04/11/2000 |
| 6049213 | Method and system for testing the reliability of gate dielectric films A method for estimating the longevity of a gate dielectric film of a semiconductor device. A plurality of test bias voltages are applied to a plurality of test semiconductor devices. The test gate currents drawn in the respective dielectric films of the t... | 04/11/2000 |
| 6046599 | Method and device for making connection A contact device having a plurality of nominally coplanar first contact elements makes electrical contact with corresponding nominally coplanar second contact elements of an electronic device when the contact device and the electronic device are positione... | 04/04/2000 |
| 6043641 | Method and apparatus for rapid determinations of voltage and current in wires and conductors A device for non-contact, non-invasive measurement of current or power in a wire, cable or conductor includes a small coil having multiple turns with a thin ferromagnetic strip. The coil may be secured to a wand or housing adapted to be used to place the ... | 03/28/2000 |
| 6043665 | Capacitor charging current measurement method A method for accurately measuring the insulation resistance of a capacitor while reducing time taken for the measurement. To this end, a current calculation equation is first obtained based on an equivalent circuit of a capacitor; then, the calculation eq... | 03/28/2000 |
| 6043664 | Method and apparatus for turn fault detection in multi-phase AC motors A method for turn fault detection in a multi-phase alternating current machine includes obtaining instantaneous line-to-neutral voltages from each phase of the machine, calculating the sum of the line-to-neutral voltages, and using the sum to determine wh... | 03/28/2000 |
| 6037777 | Method and apparatus for determining battery properties from complex impedance/admittance A device includes a microprocessor or microcontroller and measures real and imaginary parts of complex immittance of a cell or battery at n discrete frequencies, where n is an integer number equal to or greater than 2. The device determines cell/battery p... | 03/14/2000 |
