| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
|---|
| 09/12/1978 | US4114095 Solid state oscilloscope |
| 09/12/1978 | US4114092 Power circuit identifier which produces a voltage pulse in response to interruption of power |
| 09/12/1978 | US4114089 Ground fault detecting apparatus including current-responsive threshold detection circuitry |
| 09/12/1978 | US4114088 Atmospheric ion density measurement |
| 09/05/1978 | US4112499 Digital transient discriminator with noise spike clipping |
| 09/05/1978 | US4112418 Lightning current responsive alarm |
| 09/05/1978 | US4112381 Peak detector |
| 09/05/1978 | US4112357 Lighting current detector |
| 09/05/1978 | US4112317 Pulse amplitude and width detection system |
| 09/05/1978 | CA1038035A1 Microwave alarm |
| 08/29/1978 | US4110687 Dual threshold logic probe |
| 08/29/1978 | US4110641 CMOS voltage comparator with internal hysteresis |
| 08/22/1978 | US4109308 Circuit for converting a.c. voltage into a d.c. voltage |
| 08/22/1978 | US4109206 Signal strength meter drive circuit |
| 08/22/1978 | US4109198 Peak level indicating electronic circuit |
| 08/22/1978 | US4109165 Rms circuit |
| 08/22/1978 | CA1037122A1 Current measuring device |
| 08/15/1978 | US4107602 Probe means utilized with a pair of indicators for testing the wiring connections of a fuse receptacle |
| 08/15/1978 | CA1036671A1 Voltage drop warning apparatus |
| 08/08/1978 | US4106086 Voltage multiplier circuit |
| 08/08/1978 | US4105968 Electrical tester having retractable prongs and a retractable test rod for indicating presence of a voltage |
| 08/01/1978 | US4104547 Extended range current-to-time converter |
| 08/01/1978 | US4104546 Integrated circuit for use with variable voltages |
| 07/25/1978 | US4103231 Electrometric apparatus |
| 07/25/1978 | US4103230 Apparatus for analyzing electrical signals of variable amplitude |
| 07/25/1978 | US4103227 Ion-controlled diode |
| 07/25/1978 | US4103190 Complementary power saving comparator/inverter circuits |
| 07/18/1978 | US4101829 Differential current detector |
| 07/18/1978 | US4101826 Fault indicator including a reed relay responsive to above normal current flow in a conductor |
| 07/11/1978 | USRE29700 Voltage-current converter |
| 07/11/1978 | US4100487 Lightning current waveform measuring system |
| 07/11/1978 | US4100429 FET Logic circuit for the detection of a three level input signal including an undetermined open level as one of three levels |
| 06/27/1978 | US4097843 Warning device and receptacle adaptor |
| 06/27/1978 | US4097768 Rectifier |
| 06/27/1978 | US4097767 Operational rectifier |
| 06/20/1978 | US4096539 Detector of backfeed electrical currents |
| 06/20/1978 | US4096438 Wall thickness gauge and method utilizing a reed switch and magnet means on opposite sides of the wall |
| 06/20/1978 | US4096435 Level indicating device |
| 06/20/1978 | US4096395 Automatic transfer control device and voltage sensor |
| 06/13/1978 | US4095212 Remote electric state tester |
| 05/30/1978 | US4092724 Polar converter |
| 05/30/1978 | US4092586 Temperature-sensing circuit |
| 05/23/1978 | US4091297 Sample-and-hold circuit |
| 05/23/1978 | US4091292 Fail-safe monitor of d.c. voltage |
| 05/23/1978 | US4091277 Photon detection and counting system |
| 05/09/1978 | US4088974 Digital device for automatically checking carbon content in metal with reference to temperature stops on cooling curve |
| 05/09/1978 | US4088960 Monolithically integrable correlation detector |
| 05/09/1978 | US4088950 Immittance monitoring apparatus |
| 04/25/1978 | US4086651 Electrical output peak detecting apparatus |
| 04/25/1978 | US4086647 Amplitude responsive speed switch control |
| 04/25/1978 | US4086529 Fault indicator and means for resetting the same |
| 04/25/1978 | US4086525 Circuit for preventing overdischarge of a battery |
| 04/25/1978 | US4086503 Control circuit initiating conduction of an opto-isolator unit |
| 04/18/1978 | US4084583 Method and apparatus for measuring the bioelectrical activity under an electrode resting on a patient |
| 04/11/1978 | US4084156 Voltage monitoring circuit |
| 04/11/1978 | US4084134 Voltage detector with field effect transistor and high input impedance |
| 04/11/1978 | US4084133 Method of and apparatus for determining the direction of the mutual temporal shift of at least two similar stochastic signals |
| 04/04/1978 | US4082998 Dual slope integration circuit |
| 04/04/1978 | US4082995 Circuit tester with reliable indication means |
| 04/04/1978 | US4082666 For water demineralizer |
| 03/28/1978 | US4081801 Electronic measuring system with pulsed transducer |
| 03/28/1978 | US4081745 Digital-analog indicating system |
| 03/28/1978 | US4081696 Current squaring circuit |
| 03/21/1978 | US4080641 Ground fault detector |
| 03/21/1978 | US4080574 Apparatus for providing time reference signals |
| 03/21/1978 | US4080565 Method for measuring the polarization potential of metal structures located in an aggressive medium in a current field and arrangement for execution of this method |
| 03/14/1978 | US4079326 Alternating voltage level detecting apparatus |
| 03/14/1978 | US4079314 Pincette type multi-tester |
| 03/14/1978 | US4079250 Programmable voltage sensing circuit |
| 02/21/1978 | US4075697 Apparatus for monitoring two electric quantities by combining three consecutive samples of each quantity |
| 02/21/1978 | US4075558 Method of and system for metering a periodically varying voltage |
| 02/21/1978 | US4075513 Averaging and peak detection circuit |
| 02/21/1978 | US4075507 Circuit arrangement for evaluating signals, particularly output signals of optical measuring devices |
| 02/14/1978 | US4074343 Electric current chopper |
| 02/14/1978 | US4074335 Detecting circuit |
| 02/14/1978 | US4074190 Signal measuring apparatus |
| 02/14/1978 | US4074175 Inductive load current measuring circuit |
| 02/14/1978 | US4074149 Peak detecting with constant fractional offset |
| 02/14/1978 | US4074076 Chopper-multiplexer system for measurement of remote low-level signals |
| 02/07/1978 | US4073009 Apparatus for calculating amplitude values of sinusoidal waves |
| 02/07/1978 | US4073008 Apparatus for calculating amplitude values |
| 02/07/1978 | US4072851 Waveform measuring instrument with resident programmed processor for controlled waveform display and waveform data reduction and calculation |
| 01/31/1978 | US4071822 Digital voltage detecting circuit for a power source |
| 01/24/1978 | US4070615 Compensation indicator for attenuation probe |
| 01/17/1978 | US4069452 Apparatus for automatically detecting values of periodically time varying signals |
| 01/10/1978 | US4068176 Direct reading sinad meter |
| 01/10/1978 | US4068165 Circuit for determining the slope of a signal |
| 01/03/1978 | US4066959 Electronic volt-square-hour metering method and apparatus |
| 01/03/1978 | US4066953 Combination high impedance continuity and voltage indicating instrument |
| 12/27/1977 | US4065721 Solid state threshold detector with hysteresis |
| 12/20/1977 | US4064546 Protection circuits |
| 12/20/1977 | US4064408 Method and apparatus for detection of waveform peaks and slopes |
| 12/13/1977 | US4063171 Fault indicator responsive to flow of fault current in a conductor when power flow is in one direction only |
| 12/13/1977 | US4063170 Level meter circuit |
| 12/13/1977 | US4063121 Input converter |
| 12/13/1977 | US4062632 Constant modulation index technique for measuring the derivatives of device parameters |
| 12/06/1977 | US4061955 Multi-cell battery protection system |
| 12/06/1977 | US4061932 Window comparator |
| 12/06/1977 | US4061042 Audio signal monitoring system with display of two signal characteristics |
| 12/06/1977 | US4061030 Method and device for correcting the output signal from a digital transducer for measuring a physical magnitude or variable |