| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
|---|
| 03/23/1982 | US4321647 Overcurrent relays |
| 03/23/1982 | US4321543 Three-condition display system |
| 03/23/1982 | US4321530 Multimeter with tone indication |
| 03/23/1982 | US4321489 Voltage detection circuit |
| 03/18/1982 | WO1982000936A1 Alarm system for electric fences |
| 03/16/1982 | US4320347 Switched capacitor comparator |
| 03/09/1982 | US4319181 Solid state current sensing circuit |
| 03/09/1982 | US4319147 Monitoring apparatus |
| 03/02/1982 | US4318152 Digital high voltage monitor and display for electrostatic precipitators |
| 02/23/1982 | US4317056 Voltage monitoring and indicating circuit |
| 02/23/1982 | US4317052 Apparatus for converting an A.C. input signal to a rectified and smoothed D.C. signal |
| 02/16/1982 | US4316254 Portable phase angle meter instrument |
| 02/16/1982 | US4316187 Current rating verification system |
| 02/16/1982 | US4316105 Comparator |
| 02/09/1982 | US4315316 Digital arrangement for determining average current of a circuit by monitoring a voltage |
| 02/09/1982 | US4315220 Peak detector circuit |
| 02/09/1982 | CA1118057A1 Microprocessor controlled digital detector |
| 02/02/1982 | US4314326 Rectifying circuit with zero correction |
| 02/02/1982 | CA1117611A1 Tight tolerance zero crossing detector circuit |
| 01/27/1982 | EP0044368A1 Device permitting the control of static electrical charge of phonographic discs |
| 01/27/1982 | EP0044318A1 Device for measuring the charge state of an accumulator |
| 01/26/1982 | US4313145 Power output circuit |
| 01/26/1982 | CA1117221A1 Thermally isolated monolithic semiconductor die |
| 01/26/1982 | CA1117185A1 Direct current measuring system for rectifiers |
| 01/19/1982 | US4311994 Signal level indication with different colors |
| 01/19/1982 | US4311960 Transient signal processing circuit |
| 01/19/1982 | US4311956 Zero crossing phase fired controller |
| 01/19/1982 | CA1116704A1 Precision rectifier circuit |
| 01/12/1982 | US4310606 Battery voltage checking device |
| 01/12/1982 | US4309909 Crystal stabilized voltage to frequency converter with digital calibration for flowmeters |
| 01/06/1982 | EP0042878A1 Device for monitoring an amplifier stage |
| 01/05/1982 | US4309656 Level indicating circuit |
| 01/05/1982 | US4309655 Measuring transformer |
| 01/05/1982 | CA1115788A1 Level selective a-c monitoring circuit |
| 12/29/1981 | US4308497 Peak level detector |
| 12/29/1981 | US4307611 Pulse-echo ultrasonic apparatus |
| 12/29/1981 | CA1115357A1 Current comparator circuit |
| 12/24/1981 | WO1981003710A1 Ac biasing of a dc squid |
| 12/22/1981 | US4307305 Precision rectifier circuits |
| 12/15/1981 | US4306297 Apparatus for measuring the vector voltage ratio of two A.C. signals |
| 12/15/1981 | US4306193 Comparison circuit for alignment apparatus |
| 12/08/1981 | US4305132 Method to eliminate the noise at known frequency |
| 12/08/1981 | US4305008 Rectifiers |
| 12/08/1981 | CA1114034A1 Cmos voltage comparator with internal hysteresis |
| 12/01/1981 | US4303880 Gated precision offset circuit for a digital meter having a dual slope analog-to-digital converter |
| 11/25/1981 | EP0040275A1 Comparison circuit adaptable for utilization in a television receiver or the like |
| 11/24/1981 | US4302812 Analog signal level monitor |
| 11/17/1981 | US4301407 Hand held testing device for indicating an electric test voltage |
| 11/17/1981 | US4301406 Microwave warning device |
| 11/17/1981 | US4301380 Voltage detector |
| 11/17/1981 | CA1112716A1 Monitoring the condition of an insulator |
| 11/10/1981 | US4300063 Multiple input window detector |
| 11/03/1981 | US4298864 Power line fault detector circuit |
| 11/03/1981 | US4298838 Transformer device |
| 10/27/1981 | US4297680 Analog waveform digitizer |
| 10/27/1981 | US4297639 Battery testing apparatus with overload protective means |
| 10/27/1981 | US4297533 Detector to determine the presence of an electrical signal in the presence of noise of predetermined characteristics |
| 10/21/1981 | EP0037885A1 Fault current detecting circuit |
| 10/20/1981 | US4296375 Level indicator for indication of maximum values |
| 10/13/1981 | US4295128 Apparatus for measuring the degradation of a sensor time constant |
| 10/13/1981 | CA1110732A1 Temperature-sensing circuit |
| 10/13/1981 | CA1110700A1 Process to measure the distribution of the anode currents in cells for alkali metal chloride electrolysis |
| 10/06/1981 | USRE30764 Electrical output peak detecting apparatus |
| 10/06/1981 | US4293813 Current measuring system |
| 10/06/1981 | US4293782 Voltage detecting circuit |
| 10/06/1981 | CA1110363A1 Analog-to-digital converter |
| 09/29/1981 | US4292552 Bipolar voltage detector comprising differential transistor pairs |
| 09/29/1981 | US4291989 Abnormality sensing device for gas-insulated electric apparatus |
| 09/22/1981 | US4291302 Lamp monitoring circuits |
| 09/22/1981 | CA1109530A1 Commutating signal level translator |
| 09/08/1981 | US4288743 Fault indicator operable from a remote excitation source through a uniformly distributed impedance cable |
| 09/08/1981 | CA1108699A1 Apparatus for detecting loss of ac power supply and loss of current |
| 09/02/1981 | EP0034887A1 Improvements in and relating to testing coins |
| 09/01/1981 | US4286858 Voltage detecting device for camera |
| 09/01/1981 | US4286842 Solid state circuit |
| 09/01/1981 | CA1108235A1 End point quality control light circuit |
| 08/25/1981 | US4286306 Circuit arrangement for comparing the synchronism or tracking between two analog signals |
| 08/25/1981 | US4286211 Direct current detecting device using saturable reactors |
| 08/25/1981 | US4286176 Comparator with hysteresis for interfacing with a ground-referenced A.C. sensor |
| 08/20/1981 | WO1981002354A1 Improvements in and relating to testing coins |
| 08/18/1981 | US4284939 Device for detecting opposite phase and open phase |
| 08/11/1981 | US4283715 Control of display devices with electromagnetic drums |
| 08/11/1981 | US4283641 Feedback biasing circuit arrangement for transistor amplifier |
| 08/11/1981 | CA1106971A1 Electric circuits |
| 08/04/1981 | US4282489 Metastable detector |
| 07/29/1981 | EP0032647A1 Synchronous sensing device for a controlled-ignition engine |
| 07/28/1981 | US4281290 Voltage monitor |
| 07/28/1981 | US4281260 Controlled power supply for integrated circuits |
| 07/23/1981 | WO1981002066A1 Method for measuring the charge state of an accumulator and device for implementing such method |
| 07/21/1981 | US4280175 Alternating to direct voltage converter |
| 07/21/1981 | US4280124 Corrosion detector |
| 07/21/1981 | US4280093 Zero-current detector for high voltage DC transmission line |
| 07/21/1981 | US4280064 Signal isolator |
| 07/14/1981 | US4278970 Alarm circuit for detecting overheated condition |
| 07/14/1981 | US4278938 Electromagnetic arrangement for measuring electrical current |
| 07/14/1981 | CA1105112A1 Control meter usable as a potentiometric or photoelectric device |
| 07/14/1981 | CA1105087A1 Peak detecting circuitry and dual threshold circuitry therefor |
| 07/08/1981 | EP0031471A2 Device for monitoring the operational condition of an electrical consumer |
| 07/07/1981 | US4277782 Detection circuit and structure therefor |
| 07/07/1981 | US4277749 Input circuit for electronic instruments |