Patents
Sitemap › G01 - Measuring; Testing › G01R - Measuring electric variables; Measuring magnetic variables › G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850)
01/1992
01/01/1992CN2092103U Multi-core test pencil
12/1991
12/31/1991CA2045698A1 Monitoring weld voltage
12/27/1991EP0462654A1 Method to control a threshold decoder for a multilevel signal and television receiver with such a decoder
12/26/1991WO1992000580A1 Faulted circuit detector having isolated indicator
12/26/1991CA2041861A1 Faulted circuit detector having isolated indicator
12/25/1991CN2091498U Multi-functional safety ground rod
12/25/1991CN2091206U Multi-functional screwdriver
12/24/1991US5075620 Hot line indicator
12/24/1991CA1293538C Magnetic coupling electric current measuring apparatus
12/24/1991CA1293537C Signal sampling device
12/18/1991CN2091024U Three-phase knife switch with sound and light alarm
12/18/1991CN2090992U Portable line tester for vehicle
12/18/1991CN2090991U Vehicle electrometer
12/11/1991EP0460564A1 Differential amplifier circuit
12/11/1991CN2090537U Digital monitor for electric equipment of car
12/10/1991US5072103 Electrically powered portable medium
12/04/1991EP0459313A1 Comparator circuit for an integrator
12/04/1991EP0459312A1 Bounce-free comparing circuit
12/03/1991US5070468 Plant fault diagnosis system
12/03/1991CA1292775C Method for updating the scale factor of an apparatus using the faraday effect to measure the intensity of an alternating current
12/03/1991CA1292766C Monitoring device for overhead power transmission system
11/1991
11/28/1991WO1991018446A1 Wide bandwidth high speed comparator circuit
11/28/1991WO1991018375A1 Voltage pick-up circuit and flashing display for high voltage indicator device and input electrode therefor
11/28/1991DE4016075A1 Circuit detecting phase currents in multiphase system - uses one measurement resistance and signal processing circuit fed by controlled switching for reduced costs
11/27/1991EP0458044A2 Evaluation circuit for signals coming from a signal source
11/26/1991US5068818 Hardware implemented moving average processor
11/26/1991US5068776 Switched-mode DC-DC power converter for reducing effects of magnetization current
11/26/1991US5068598 Tension potential measuring circuit with selected time constant
11/21/1991EP0457609A2 Detector for automatic gain control amplifier circuit
11/21/1991EP0457582A2 Level detecting circuit
11/20/1991CN2089204U Safety protecting type load switch
11/20/1991CN2089176U Dc high pressure measurer
11/19/1991US5067138 Phase-locked-loop circuit and bit-detection arrangement comprising such a phase-locked-loop circuit
11/19/1991US5066909 Apparatus for testing an electronic circuit having an arbitrary output waveform
11/19/1991US5066905 Battery cable assembly with in-line switch
11/19/1991US5066903 Optical current transformer
11/13/1991EP0456238A1 Device for multiphase current monitoring
11/13/1991EP0456132A2 System for determining an alternating voltage and/or current
11/13/1991CN2088696U Electricity detector for automobile and motorcycle
11/13/1991CN2088695U Precision 12 microamper bridge type milliammeter
11/12/1991US5065142 Voltage pickup circuit and flashing display for high voltage indicator device, and input electrode therefor
11/12/1991US5065088 Current sensor circuit
11/12/1991US5065047 Digital circuit including fail-safe circuit
11/07/1991DE4014267A1 Current flow detecting circuitry for electrical lead - couples circuit with two comparators to ohmic resistor switched into lead to supply evaluating circuit for digital signals
11/06/1991EP0454946A1 Process for obtaining approximative values of instant values of parameters of at least a sinusoidal signal with constant and known frequency
11/06/1991EP0454860A1 Potential sensor using electro-optical crystal and method of measuring potential
11/06/1991CN2088257U A.c. voltage power type current detector with compensator
11/06/1991CN1014640B Automatic electrical load timingly peak-limiting controller
10/1991
10/31/1991DE4013089A1 IC engine control input voltage error corrected measurement - deriving accurate value of auxiliary parameter and replacement of reference parameter with derived digital ratio
10/31/1991DE4013017A1 Testing covered current pack in body, esp. IC - by heating covering magneto-optical film to reduce coercivity field strength, cooling and measuring magnetisation
10/30/1991EP0454013A2 Measurement circuit for detecting a current
10/23/1991EP0452557A1 Signal level measuring circuit including correction means
10/23/1991CN2087345U Direct-current test pencil
10/23/1991CN1055606A Combined instrument with electronic arithmetic circuitry for electrical-power automatization
10/23/1991CN1055605A Optoelectronic high-voltage and frequency testing probe
10/23/1991CN1014467B Device for detecting current
10/23/1991CN1014466B Electric current measuring arrangement
10/22/1991US5059923 Fractional load current detector
10/22/1991US5059895 Battery voltmeter
10/22/1991CA1291212C Tester system for electrical power circuits
10/17/1991WO1991015775A1 Input circuit for converting an input voltage into a binary information signal
10/17/1991WO1991015756A1 Temperature independent voltage monitor for use in a battery operated electronic device
10/17/1991WO1991013363A3 Signal conditioning circuit
10/17/1991DE4011415A1 Eingabeschaltung zum umsetzen einer eingangsspannung in ein binaeres informationssignal For converting an input voltage input circuit into a binary information signal
10/16/1991EP0207159B1 Voltage comparator of a type of low power comsumption
10/15/1991US5057779 Temperature independent voltage monitor for use in a battery operated electronic device
10/15/1991US5057774 Apparatus for measuring the quiescent current of an integrated monolithic digital circuit
10/15/1991US5057770 Electrical probe
10/15/1991US5057383 Battery system
10/10/1991DE4011193A1 Current supply monitoring in PCM system - has opto-coupler between switch transistor and thyristor monitor activating signal device
10/09/1991EP0450938A2 Battery having a label comprising a voltmeter
10/09/1991EP0450245A2 Detector for rapid variations of the supply voltage of an integrated circuit
10/09/1991CN2086453U 显示开关 Display Switches
10/08/1991US5055828 Parasitic-ground current indicator for electrical system
10/08/1991US5055773 Detection and measurement of a dc component in an ac waveform
10/08/1991CA1290399C Measuring circuit of the dc component of the current flowing through theprimary winding of the output transformer of an inverter
10/02/1991EP0448767A1 Battery system
10/02/1991CN2085968U Special test pencil for automobile
09/1991
09/26/1991DE4109546A1 Voltage tester for checking connection of conductor - ensures low voltage AC network phase has switchable threshold for compensating absence of earth line
09/26/1991DE4009799C1 Measuring DC or AC voltage using symmetrical voltage divider - having two equal resistors bridged by two resistors in series with node connected to reference voltage source
09/25/1991EP0447729A2 Level detector hardened against noise
09/24/1991US5051733 High voltage indicator device
09/24/1991US5051687 Transimpedance circuit
09/24/1991US5051682 System for detecting load on generator
09/18/1991EP0446951A2 Four-pole circuit breaker
09/18/1991EP0446546A2 Procedure and device making use of thermo-electric effects to measure a physical entity the variation of which is capable of modifying the thermophysical properties of a substance
09/18/1991CN1054668A Zero magnetic flow direct current mutual-inductor
09/17/1991US5050190 Signal detection circuit not affected by minute voltage fluctuations contained in input signal and operation method therefor
09/17/1991CA1289203C Synchronous demodulator with digital signal output
09/10/1991US5047751 Power supply voltage monitoring circuit
09/10/1991US5047667 Voltage difference detector
09/10/1991CA1288818C Test meters
09/05/1991WO1991013363A2 Signal conditioning circuit
09/04/1991CN2084199U Ceramic insulator capacitance integral sensor
09/04/1991CN1054317A Transmission direction meter of ac energy
08/1991
08/28/1991CN2083754U Pliers type wide frequency band current tester
08/27/1991US5043655 Current sensing buffer for digital signal line testing
08/27/1991US5043557 Load voltage detecting device for use in an apparatus for supplying a current variable with time to a load section
08/22/1991WO1991012536A1 Voltage imaging system using electro-optics
08/22/1991WO1991012534A1 Voltage imaging system using electro-optics
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