| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
|---|
| 03/22/1977 | US4013931 Voltmetric system comprising an electromagnetic relay |
| 03/22/1977 | US4013902 Initial reset signal generator and low voltage detector |
| 03/22/1977 | US4013899 Apparatus for converting a potential signal developed between two high impedance electrodes to a current signal and for transmitting this current signal to a remote location over a two wire transmission |
| 03/15/1977 | US4012669 Electronic overload detecting device |
| 03/08/1977 | US4011509 Apparatus for relative power measurements in a power meter |
| 03/08/1977 | US4011508 Logic signal test device for indicating low, intermediate and high level signals |
| 03/08/1977 | US4011507 Full cycle current detector |
| 03/08/1977 | US4011500 Physical displacement sensing with differential capacitor |
| 03/08/1977 | US4011449 Apparatus for measuring the beam current of charged particle beam |
| 02/22/1977 | US4009447 Amplifier arrangement with zeroing device for piezoelectric transducers |
| 02/15/1977 | US4008406 Electronic circuit using field effect transistor with compensation means |
| 02/08/1977 | US4007418 Personal electrostatic safety monitor with induction plate sensing means |
| 02/08/1977 | US4007414 Current transducer arrangement |
| 02/01/1977 | US4006414 Indicating device |
| 02/01/1977 | US4006413 Field instrument for measurement of AC voltage fluctuations |
| 02/01/1977 | US4006409 Electrical ground fault detecting device |
| 02/01/1977 | US4006369 Current generator including a rate discriminator |
| 02/01/1977 | US4006348 Apparatus for monitoring two electric quantities by combining three consecutive samples of each quantity |
| 01/25/1977 | US4005365 Voltage comparator and indicating circuit |
| 01/25/1977 | US4005362 Electrical circuit continuity tester |
| 01/25/1977 | US4004450 Device for measuring impact pulses |
| 01/18/1977 | US4004247 Voltage-current converter |
| 01/18/1977 | US4004223 Audible resistance or voltage tester |
| 01/18/1977 | US4004221 Test device and method of checking circuitry |
| 01/18/1977 | US4004161 Rectifying circuits |
| 01/04/1977 | US4001697 Linear a.c. measurements |
| 01/04/1977 | US4001686 Electronic circuit testing apparatus |
| 01/04/1977 | US4001676 Solid-state threshold detector |
| 01/04/1977 | US4001605 Voter circuit including averaging means |
| 12/28/1976 | US4000462 Fault indicator circuit |
| 12/28/1976 | US4000455 Fast current measurement apparatus for static VAR generator compensator control circuit and method for using same |
| 12/28/1976 | US4000453 Storage battery charging system with alternator output fault indicating circuit |
| 12/28/1976 | US4000412 Voltage amplitude multiplying circuits |
| 12/21/1976 | US3999126 Test device for simultaneously displaying the level of logic signals in a plurality of circuits |
| 12/21/1976 | US3999125 Peak detector having signal rise-time enhancement |
| 12/21/1976 | US3999124 Reference quantity and unknown quantity comparator |
| 12/21/1976 | US3999123 Digital voltage level measuring device |
| 12/21/1976 | US3999087 Missing phase detection circuit for use with three-phase power sources |
| 12/21/1976 | US3999083 Automatic threshold circuit |
| 12/14/1976 | US3996880 Field strength meter |
| 12/07/1976 | US3996479 Comparator/bistable circuit |
| 12/07/1976 | US3996453 Totalizer |
| 11/30/1976 | US3995243 Fault detection indicator |
| 11/30/1976 | US3995210 Variable gain electronic current transformer |
| 11/30/1976 | US3995175 High impedance voltage probe |
| 11/30/1976 | US3995174 Chopper and chopper-multiplexer circuitry for measurement of remote low-level signals |
| 11/23/1976 | US3993985 Indicator for the condition of a battery operating a timepiece |
| 11/23/1976 | US3993951 Alternating current meter circuit |
| 11/16/1976 | US3991628 Level meter for sound signals |
| 11/09/1976 | US3991367 Detection of potential on high-voltage transmission lines |
| 11/09/1976 | US3991366 Means for indicating abnormal high current flow in a high voltage electric power distribution conductor and for resetting and testing same |
| 11/02/1976 | US3990008 Display circuit for battery powered digital meter |
| 11/02/1976 | US3989997 Absolute-value circuit |
| 10/19/1976 | US3987425 Leakage resistance detector and alarm circuit |
| 10/19/1976 | US3987393 Line voltage monitor |
| 10/19/1976 | US3987392 Luminescent voltage indicator circuit |
| 10/19/1976 | US3987309 Superconductive sensing circuit for providing improved signal-to-noise |
| 10/12/1976 | US3986117 Device for adjusting laser system pulse forming network voltage on replacement of power supply or receiver transmitter unit |
| 10/12/1976 | US3986116 Transient source and direction of propagation detector |
| 10/12/1976 | US3986115 Transient direction detector |
| 10/05/1976 | US3984772 Signal peak detection arrangement |
| 10/05/1976 | US3984766 Digital apparatus for rapidly detecting the growth of and identifying micro-biological organisms |
| 10/05/1976 | US3984765 Power outlet circuit tester with ground fault testing capability |
| 09/21/1976 | US3982181 Apparatus and method for tracing energized AC circuits |
| 09/21/1976 | US3981586 Continuously monitoring ratiometer |
| 09/07/1976 | US3979741 Power loss alarm system |
| 09/07/1976 | US3979670 Apparatus for detecting and measuring peak-to-peak values in electrical signals |
| 09/07/1976 | US3979667 Electrical indicators |
| 09/07/1976 | US3979664 Capacitor discharge ignition testing apparatus employing visual spark gap indicator |
| 09/07/1976 | US3978727 Method and device for correcting the output signal from a digital transducer for measuring a physical magnitude or variable |
| 08/31/1976 | US3978472 Digital volt-ohmmeter |
| 08/31/1976 | US3978402 Apparatus for producing an electrical output signal whose magnitude is linearly representative of the value of an unknown resistance |
| 08/24/1976 | US3976940 Testing circuit |
| 08/24/1976 | US3976895 Low power detector circuit |
| 08/10/1976 | US3974446 Polyphase fault current flow detecting and resetting means |
| 08/10/1976 | US3974445 Portable kilovoltmeter |
| 08/10/1976 | US3974438 Apparatus for indicating over-current condition in a transistor amplifier |
| 08/10/1976 | US3974425 Isolator circuit with improved frequency response |
| 08/10/1976 | US3974334 Waveform processing |
| 08/03/1976 | US3973197 Peak detector |
| 08/03/1976 | US3973195 Current potential indicator |
| 08/03/1976 | US3973180 Voltage boosting detector circuit |
| 07/27/1976 | US3971984 Wide-range logarithmic responding translation circuit |
| 07/27/1976 | US3971979 Voltage transducer |
| 07/20/1976 | US3971055 Analog memory circuit utilizing a field effect transistor for signal storage |
| 07/20/1976 | US3971007 Line isolation monitor |
| 07/20/1976 | US3970933 Device for checking a D.C. source voltage relative to a predetermined value |
| 07/20/1976 | US3970932 Hot line detection system for high voltage switchgear |
| 07/20/1976 | US3970930 Current meter |
| 07/20/1976 | US3970870 Signal rectifying circuit |
| 07/13/1976 | US3969711 Line isolation monitor and alarm |
| 07/13/1976 | US3969710 Apparatus for picking up signal currents flowing through signal lines |
| 07/13/1976 | US3969697 Voltage drop warning apparatus with negative-resistance device |
| 07/13/1976 | US3969671 Charging current voltmeter |
| 06/29/1976 | US3967257 Current monitor circuits |
| 06/29/1976 | US3967198 Method and apparatus for electrically determining plant water status |
| 06/29/1976 | US3967195 Circuit tester for three wire electrical outlets |
| 06/29/1976 | US3965744 Equipment for compensating for sensor variations |
| 06/22/1976 | US3965469 Annunciator structure and method |
| 06/22/1976 | US3965419 Cathode ray tube meters |