| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
|---|
| 10/03/1987 | CN86200841U Low-loss 0.5 grade voltammeter based on optical multiplying mirror principle |
| 09/30/1987 | EP0239267A2 Integrators |
| 09/30/1987 | EP0238500A1 Arrangement for the contact-less testing of the presence of an electrical voltage |
| 09/30/1987 | CN86206053U Pencil type high/low voltage level tester with h or l display |
| 09/29/1987 | US4697151 Method and apparatus for testing operational amplifier leakage current |
| 09/29/1987 | US4697099 Open line detector circuit |
| 09/29/1987 | US4696189 Housing for a measuring device |
| 09/23/1987 | EP0238283A2 High voltage detecting circuit |
| 09/23/1987 | EP0237694A1 Circuit arrangement for evaluating AC signals obtained from a signal source |
| 09/23/1987 | EP0237583A1 Method and circuit arrangement to convert a measured voltage into a digital value |
| 09/23/1987 | CN86208817U Liquid crystal, passive and inductive test pencil |
| 09/22/1987 | US4695961 Solid state overcurrent detector |
| 09/22/1987 | US4695794 Voltage calibration in E-beam probe using optical flooding |
| 09/22/1987 | US4695793 Resistive sensing thermal device for current measurement |
| 09/16/1987 | CN86203056U Alternating voltage meter |
| 09/16/1987 | CN86202436U Miniature induction electrometrical instrument |
| 09/15/1987 | US4694402 Waveform disturbance detection apparatus and method |
| 09/12/1987 | CN86206596U Multipurpose voltage detector |
| 09/09/1987 | CN86208238U Test pencil capable of indicating voltage level |
| 09/09/1987 | CN86208171U Test pencil with magnet |
| 09/09/1987 | CN86207897U Multipurpose test pencil |
| 09/09/1987 | CN86206309U Digital multimeter for comprehensive measurement of power system |
| 09/08/1987 | US4692933 Electro-mechanical integrator |
| 09/08/1987 | US4692693 Apparatus for measuring low currents with high dynamics |
| 09/08/1987 | US4692692 Electronic apparatus for detecting stray variations in an electrical voltage as a function of time |
| 09/08/1987 | CA1226688A1 Digital acquisition system including a high-speed sampling gate |
| 09/08/1987 | CA1226622A1 Current overload detector |
| 09/02/1987 | EP0053625B1 Ac biasing of a dc squid |
| 08/26/1987 | EP0233526A2 Radiation sensing apparatus |
| 08/26/1987 | CN86207250U Automatic current meter |
| 08/26/1987 | CN86205701U Test pencil used outside insulated layer |
| 08/25/1987 | US4689501 Signal level detector for compact disc player |
| 08/25/1987 | US4689499 Universal current source and current sink sensor interface |
| 08/19/1987 | CN86208856U Sealed lorry-type meterage cabinet for high voltage |
| 08/19/1987 | CN86203242U Multi-function phase-sequence test pencil |
| 08/18/1987 | US4687987 Beam current sensor |
| 08/18/1987 | CA1225744A1 Voltage comparator circuit |
| 08/12/1987 | CN86203374U Digital d-c microammeter for measuring leakage rate of high voltage electrical equipment |
| 08/11/1987 | US4686518 Fault indicator having trip inhibit circuit |
| 08/11/1987 | US4686459 Level indicator |
| 08/11/1987 | US4686454 Conductor tracer with improved open circuit detection, close-range discrimination and directionality |
| 08/11/1987 | US4686390 Digital peak-hold circuit |
| 08/11/1987 | CA1225436A1 Fault indicator having trip inhibit circuit |
| 08/05/1987 | CN86203178U Test pencil with phase-sequence detection and safe or dangerous voltage identification functions |
| 08/04/1987 | US4685048 AC-DC transformation circuit |
| 08/04/1987 | CA1225157A1 Signal recognition system |
| 07/29/1987 | CN86206495U Electrical meter with coaxial needles |
| 07/28/1987 | US4683376 Opposing field spectrometer for electron beam mensuration technology |
| 07/28/1987 | US4682735 Electrostatic field indicator light for electrostatic nozzles |
| 07/23/1987 | DE3601282A1 Circuit arrangement for voltage monitoring |
| 07/22/1987 | EP0229062A1 Fan motor monitoring circuit |
| 07/21/1987 | US4682278 Procedure and device for detecting the non-conducting state of turn-off thyristors |
| 07/21/1987 | US4682051 Voltage level detection circuit |
| 07/21/1987 | US4682047 Complementary metal-oxide-semiconductor input circuit |
| 07/16/1987 | DE3607478C1 Circuit arrangement for indicating circuit states of a multiplicity of electrical components |
| 07/15/1987 | CN86207372U Safe test pencil |
| 07/14/1987 | US4680722 Arrangement for determining the starting instant of the leading edge of a high-frequency pulse |
| 07/14/1987 | US4680542 Logic circuit tester |
| 07/14/1987 | US4680527 Electrical battery including apparatus for current sensing |
| 07/14/1987 | US4680483 Comparator circuit |
| 07/08/1987 | EP0227908A1 Device for voltage measurement by sampling |
| 07/08/1987 | EP0227669A1 Remote sensor with compensation for lead resistance |
| 07/07/1987 | US4679042 Bar/dot level meter |
| 07/07/1987 | US4678947 Simulated transistor/diode |
| 07/07/1987 | US4678345 Equivalent time pseudorandom sampling system |
| 07/01/1987 | EP0227248A2 Apparatus for indicating proper compensation of an adjustable frequency compensation network |
| 07/01/1987 | EP0227149A1 Current-sensing circuit for a power semiconductor device, in particular an integrated intelligent power semiconductor switch specifically for applications in motor vehicles |
| 07/01/1987 | EP0226631A1 Method and apparatus for editing particle produced electrical pulses. |
| 07/01/1987 | CN86207339U Universal test meter with megaohm-measuring capacity |
| 06/30/1987 | US4677388 Synchronization slicer |
| 06/25/1987 | DE3545375A1 Method for automatically calibrating an integrating-type, microcomputer-controlled measuring instrument |
| 06/25/1987 | DE3544542A1 Method and device for detecting surge voltages |
| 06/24/1987 | EP0226351A2 Three-voltage level detector |
| 06/23/1987 | US4675664 Alarm system and method for detecting proximity of an object to electrical power lines |
| 06/23/1987 | US4675598 Current measuring device in an electrical distribution switchboard or enclosure |
| 06/19/1987 | DE3704221A1 Circuit arrangement for floating direct-current measurement |
| 06/19/1987 | DE3543985A1 Arrangement for detecting fault currents |
| 06/18/1987 | WO1987003694A1 High-speed precision equivalent time sampling a/d converter and method |
| 06/17/1987 | CN86204933U Electric test tool |
| 06/17/1987 | CN86204190U Electric test pencil with pulsed light and sound display |
| 06/17/1987 | CN86102806A Method for measuring the arc-breaking parameter of welding ac arc and its equipment |
| 06/16/1987 | EP0225704A2 Method and apparatus for waveform analysis |
| 06/16/1987 | EP0225681A1 Electrical detecting device |
| 06/10/1987 | EP0225092A2 Circuit arrangement for protecting a CRT and associated circuitry from damage due to arcing |
| 06/10/1987 | EP0224935A2 Amplitude detection circuit |
| 06/10/1987 | EP0224707A1 Circuit arrangement for the self-control of a plurality of analogous electrical signals |
| 06/10/1987 | CN86208054U Voltage-testing indicator without touching conductor |
| 06/10/1987 | CN86201349U High-voltage equipotential self-checking acoustooptical electroscope |
| 06/09/1987 | US4672555 Determining the value of a plurality of ac power parameters |
| 06/09/1987 | US4672367 Optical indicator device |
| 06/09/1987 | US4672236 Voltage-to-frequency converter circuit |
| 06/03/1987 | EP0223956A1 Circuit arrangement for indicating the current and/or power consumption of an electrical load |
| 06/02/1987 | US4670712 Frequency measurement method and device |
| 05/27/1987 | EP0223333A1 DC voltage indicator |
| 05/27/1987 | DE3640074A1 Voltage level detector/holding circuit |
| 05/27/1987 | CN86202707U Voltage testpen with phase-detecting feature |
| 05/26/1987 | US4668944 Fail safe circuit for a salinity monitor |
| 05/26/1987 | US4668910 Method and circuit for determining the presence or absence of at least one frequency of known value in an input signal composed of several frequencies |
| 05/26/1987 | US4668907 Monolithically integratable current adding circuit |
| 05/20/1987 | EP0222278A1 Voltage sensor |