| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
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| 04/05/1994 | US5300880 Method of measuring a voltage with an electron beam apparatus |
| 04/05/1994 | US5300826 Interface circuit for audio signal |
| 04/05/1994 | US5300825 Peak signal detecting device |
| 03/31/1994 | DE4232476A1 Three=phase network monitoring arrangement for low voltage and phase failure - has single IC component which detects and evaluates each half wave of all phases |
| 03/30/1994 | EP0589729A2 Releasable sensor for faulted circuit detector |
| 03/30/1994 | EP0589593A2 Electro-optic sampling |
| 03/29/1994 | US5299149 System for detecting alternating voltage and/or current |
| 03/29/1994 | US5298853 Electrical apparatus for detecting relationships in three phase AC networks |
| 03/23/1994 | EP0588131A2 Sensor voltage reading circuit |
| 03/23/1994 | CN2159568Y Induction voltage tester |
| 03/23/1994 | CN2159567Y Fault detector for electric circuit of automotive vehicle |
| 03/23/1994 | CN1084278A DC current sensor |
| 03/22/1994 | US5296844 Electrical contact avoidance device |
| 03/22/1994 | US5296802 Current sensor using a resonance directional magnetometer |
| 03/22/1994 | US5296753 Comparator circuit |
| 03/17/1994 | WO1994006121A1 High speed transient sampler |
| 03/17/1994 | DE4243481C1 Wideband rectifier with lower cut=off frequency of several hundred Megahertz - has feedback circuit consisting of two series diodes between output and inverting input of operational amplifier, and adjustment resistor between diodes and non-inverting input |
| 03/17/1994 | DE4230978A1 Voltage amplitude comparator - contains two input diodes having common cathode connection with cathode of third diode, which is coupled to current source at anode, at which higher input voltage appears |
| 03/16/1994 | EP0587491A1 Measuring appliance using Rogowski coil |
| 03/16/1994 | EP0587418A2 Electro-optic probe |
| 03/16/1994 | EP0586889A2 Method for measuring the amplitude and phase of a plurality of high frequency signals |
| 03/16/1994 | CN2159026Y Liquid crystal numerical AC current meter |
| 03/16/1994 | CN2159025Y Liquid-crystal numerical AC voltmeter |
| 03/16/1994 | CN2159024Y Numerical high-voltage meter with acousto-optical signal |
| 03/10/1994 | DE4229948A1 Hysteresis-free current sensor - has soft magnetic core for coupling prim. and sec. coils, generator for periodically magnetising to positive and negative saturation and sample=and=hold circuit for acquiring sec. current to form average voltage drop |
| 03/10/1994 | DE4229770A1 Measuring transient repetitive voltage of circuit using current injection - feeding current pulse to comparison resistance for calibration and measuring voltage drop, feeding pulse into circuit, measuring voltage drop and integrating to determine time delay, slope and peak amplitude |
| 03/09/1994 | EP0586226A2 Optical voltage electric field sensor |
| 03/09/1994 | EP0586202A2 Voltage measuring apparatus |
| 03/09/1994 | EP0585703A2 Method and means for measuring electrical quantities, especially the current, in an electric motor fed by a frequency transformer |
| 03/09/1994 | EP0585354A1 Multilayer female component for refastenable fastening device |
| 03/09/1994 | EP0318814B1 Digital circuit testing apparatus |
| 03/08/1994 | US5293295 Digital protective relay apparatus |
| 03/08/1994 | US5293113 Test instrument for the display of electric voltages |
| 03/03/1994 | WO1994004931A1 Level measuring set |
| 03/03/1994 | DE4326681A1 Magnetic field measuring appts. - has RMS converter and magnetic field sensor monolithically integrated on silicon@ chip |
| 03/02/1994 | EP0584827A1 Absolute value circuit |
| 03/02/1994 | EP0584786A1 Averaging circuit |
| 03/02/1994 | EP0584403A1 Circuit calculating the minimum value |
| 03/02/1994 | EP0584402A1 Circuit calculating the maximum value |
| 03/02/1994 | EP0396695B1 Universal output circuit |
| 03/02/1994 | CN2158088Y Testing meter for electric appliances |
| 03/01/1994 | US5290991 Adjustment process of an electronic trip device |
| 02/23/1994 | CN2157523Y Electronic induction test pencil |
| 02/22/1994 | US5289166 Voltage detector |
| 02/22/1994 | US5289114 Voltage detection apparatus using short pulse light source with narrow spectral band width |
| 02/22/1994 | US5287591 Carpet cleaning machine with convertible-use feature |
| 02/17/1994 | WO1994003818A1 High speed power analyzer |
| 02/15/1994 | US5287063 Calibration circuit and method for maximum and minimum value detection apparatus |
| 02/15/1994 | US5287062 Reference voltage measuring bridge for a device for monitoring and measuring the insulation of a DC voltage electrical mains system |
| 02/15/1994 | US5287055 Circuit for measuring current in a power MOS transistor |
| 02/09/1994 | EP0582289A1 Transistor circuit for holding peak/bottom level of signal |
| 02/09/1994 | EP0582072A1 Temperature compensated voltage regulator having beta compensation |
| 02/09/1994 | EP0581993A1 Circuit arrangement for the control of a load and the detection of line interruption |
| 02/09/1994 | EP0581936A1 A modulator circuit. |
| 02/08/1994 | US5285115 Comparator device for comparing analog voltages |
| 02/03/1994 | DE4225458A1 Differential current measurement using summing current ring-core transformer - has magnetoresistive sensor in first flux gap in core and provides pre-adjustment by flux from permanent magnet and yoke connected across second air gap |
| 02/02/1994 | EP0581556A2 Non-contact type probe and non-contact type voltage measuring apparatus |
| 02/02/1994 | EP0581444A2 High sensitivity superconductive digitizer |
| 02/02/1994 | EP0581343A1 Device for optically supplying information |
| 02/02/1994 | EP0580923A1 Circuit for detecting voltage variations in relation to a set value, for devices comprising errors amplifiers |
| 02/02/1994 | EP0580748A1 Low power voltage sensing circuit |
| 02/02/1994 | CN1023668C Bidirectional dc power controller with fault protection |
| 02/01/1994 | US5283543 Multi-phase current monitoring device |
| 02/01/1994 | US5283515 Automatic calibration system for a ramp voltage generator |
| 01/26/1994 | EP0579959A2 Signal detecting device |
| 01/26/1994 | CN2154491Y Electricity leakage alarm electroscope |
| 01/26/1994 | CN2154487Y Electron acoustic test connection pen |
| 01/21/1994 | CA2085724A1 Load energized electronic test pencil |
| 01/19/1994 | EP0579462A2 DC current sensor |
| 01/19/1994 | EP0513077B1 Integrated optics pockels cell voltage sensor |
| 01/19/1994 | EP0276280B1 Method for remotely detecting an electric field |
| 01/19/1994 | EP0274529B1 Liquid crystal display |
| 01/19/1994 | CN2153806Y Open phase or pressure loss alarm device for switchhouse |
| 01/18/1994 | US5280198 Power supply level detector |
| 01/13/1994 | DE4317598A1 Test unit for detecting resistance and voltage presence or drop e.g. for vehicle - has connectors for coupling leads to positive and negative terminals of battery, manually-operated switch for controlling supply of current, and protection switch against cable burning due to short-circuit |
| 01/12/1994 | CN2153196Y Low-power consumption display monitoring switch |
| 01/12/1994 | CN2153064Y Test pencil |
| 01/12/1994 | CN2153063Y Multifunctional test pencil |
| 01/12/1994 | CN1080726A Zero blanking float method and device for micro current measurer |
| 01/11/1994 | US5278552 Indicator control circuit |
| 01/05/1994 | DE4221847A1 Current and voltage measurement arrangement for electrochemical cells - operates as ground-referenced current or voltage source by switching between potentiostatic voltage from instrumentation amplifier across measurement resistor, and galvanostatic voltage from reference electrode via multiplexer. |
| 01/05/1994 | DE4220778A1 Auxiliary switch condition contactless monitoring circuit - has AC source for de-oxidation of contact and condition registration via potential divider opto-coupled to digital signal output unit |
| 01/05/1994 | CN2152319Y Leakage-display alarm plug |
| 01/04/1994 | US5276605 Negative half-wave summing rectifier apparatus for a three phase AC voltage |
| 12/29/1993 | EP0523048B1 Fibre optic arrangement for measuring the strength of an electric current |
| 12/29/1993 | EP0424390B1 Voltage comparator |
| 12/29/1993 | CN2151560Y DC load monitor |
| 12/28/1993 | US5274674 Method of controlling a threshold decoder for a signal having several levels and being affected by echoes, and television receiver provided with such a decoder |
| 12/28/1993 | US5274577 System for linearizing a non-linear sensor output |
| 12/28/1993 | US5274569 Dual sense non-differencing digital peak detector |
| 12/28/1993 | US5274324 Hot line mountable hotline indicator having liquid crystal display with resettable memory function |
| 12/21/1993 | US5272658 Long-term integrator |
| 12/21/1993 | US5272479 Superconductive analog to digital converter |
| 12/21/1993 | US5272395 CMOS strobed comparator |
| 12/21/1993 | US5271268 Ionic current sensing apparatus |
| 12/17/1993 | CA2098430A1 Automotive battery voltage drop monitor |
| 12/16/1993 | DE4218832A1 Power failure detecting for sensing drop=out of AC mains voltage - using digital evaluation of frequency of mains voltage by passing through frequency multiplier, rectifier and monostable flip=flop to controller. |
| 12/15/1993 | CN2149634Y Arrangement for indicating short-circuit of power equipment |
| 12/15/1993 | CN2149632Y Safety cap for indicating the presence of electricity with language alarm |
| 12/14/1993 | US5270660 Electrostatic voltmeter employing high voltage integrated circuit devices |