Patents
Sitemap › G01 - Measuring; Testing › G01R - Measuring electric variables; Measuring magnetic variables › G01R 21 - Arrangements for measuring electric power or power factor
Patents for G01R 21 - Arrangements for measuring electric power or power factor (6,609)
11/1981
11/17/1981US4301508 Digital processing system for time-of-day and demand meter display
11/17/1981US4301444 Apparatus for detecting possible defeat of systems for remote metering of utilities
11/17/1981US4301408 Electrical measuring apparatus employing magneto-electric devices
11/10/1981US4300182 Metering and protection system for an A.C. power system
11/10/1981US4300125 System for monitoring, transmitting and conditioning of information gathered at selected locations
11/03/1981US4298839 Programmable AC electric energy meter having radiation responsive external data interface
10/1981
10/20/1981US4296411 Electronic remote meter reading apparatus
10/15/1981WO1981002960A1 Control unit for automatic meter reading system
10/15/1981WO1981002958A1 Terminal unit for automatic meter reading system
10/07/1981EP0036893A1 Electric power measuring apparatus
09/1981
09/22/1981US4291377 Apparatus for measuring electrical power
09/22/1981US4291376 Digital energy monitor
09/22/1981US4291375 Portable programmer-reader unit for programmable time registering electric energy meters
09/09/1981EP0035025A1 System for central reading and registration of customers' power consumption.
09/08/1981US4288744 Summing watt-hour transducer
09/08/1981US4288734 Bidirectional integrator
09/02/1981EP0034963A1 Electronic measuring device for a multi-phase circuit, especially for measuring the energy
08/1981
08/25/1981US4286214 Current sensor for phase inversion-modulation of AC signals
08/19/1981EP0034031A1 Electricity meters
08/11/1981US4283772 Programmable time registering AC electric energy meter having electronic accumulators and display
08/04/1981US4282576 Indicator diagram based AC electric energy meter
07/1981
07/28/1981CA1106021A1 Device for centrally recording amounts
07/14/1981US4278979 Method and apparatus for testing survival radios
06/1981
06/23/1981US4275349 Watt and var transducer
06/10/1981EP0030041A1 Measuring transformer, especially for measuring a magnetic field generated by a measuring current
06/09/1981US4272723 Power factor meter
05/1981
05/20/1981EP0028625A1 Bidirectional integrator.
05/12/1981CA1101073A1 Digital processing and calculating ac electric energy metering system
05/06/1981EP0028176A1 Process and device for measuring electric power
05/05/1981CA1100577A1 Electronic kilowatt-hour meter with error correction
04/1981
04/28/1981US4264897 Meter register encoder including electronics providing remote reading capability
04/28/1981US4264861 Electronic ampere-hour meter
04/21/1981US4263653 Digital RF wattmeter
04/16/1981WO1981001058A1 Electric power measuring apparatus
04/14/1981US4262250 Microwave measuring device
04/02/1981WO1981000915A1 Method and apparatus for testing survival radios
04/01/1981EP0025917A1 Electronic three-phase current electricity meter for capacitor charge exchange method
03/1981
03/17/1981US4257123 Device for monitoring the performance of a transmitter
03/17/1981US4257004 Electrical energy measuring multimeter
03/10/1981US4255707 Electrical energy meter
03/10/1981US4255705 Peak detection and electronic compensation of D. C. saturation magnetization in current transformers used in watt hour meter installations
03/10/1981US4255704 Zero crossing detection and electronic compensation of D. C. saturation magnetization in current transformers used in watthour meter installations
03/10/1981US4255700 Control circuit of reactive power compensation apparatus
03/05/1981WO1981000619A1 A device for central reading and registration of customers'power consumption
03/03/1981US4254472 Remote metering system
03/03/1981US4254376 Apparatus for measuring the electric power or energy in an A-C network
03/03/1981CA1096942A1 Power monitor
02/1981
02/24/1981US4253151 Apparatus for monitoring and controlling consumer power consumption
02/10/1981US4250552 AC Electric energy meter utilizing a counter as an integrator
02/10/1981US4250449 Digital electric energy measuring circuit
01/1981
01/07/1981EP0021370A1 Tariff assessing device for electric power consumption
12/1980
12/30/1980US4242634 Electronic multiplying circuits
12/24/1980WO1980002893A1 Bidirectional integrator
12/23/1980CA1092194A1 Electronic kwh meter having virtual ground isolation
12/23/1980CA1092193A1 Power monitor
12/16/1980US4240149 Measuring system
12/16/1980US4240030 Intelligent electric utility meter
12/10/1980EP0019621A1 Process for measuring electric power.
12/09/1980US4238732 Method of qualifying diodes for a microwave power combiner
11/1980
11/25/1980US4236217 Energy utilization or consumption recording arrangement
11/25/1980US4236112 Power measuring apparatus
11/11/1980US4233590 Supplemental energy register
11/04/1980US4232298 Remotely-controllable relays and filters therefor
10/1980
10/21/1980US4229795 Electronic maximum measuring device
10/07/1980US4227070 Electrical totalizer
10/07/1980CA1087248A1 Solid state watt and var transducer
09/1980
09/30/1980CA1086827A1 Energy monitoring device
09/30/1980CA1086826A1 Two-way electronic kwh meter
09/23/1980US4224671 Arithmetic operation apparatus for an electronic watt-hour meter
09/17/1980EP0015666A1 Apparatus for controlling electrical power consumption
09/16/1980US4223264 Radio wave power measuring apparatus
09/09/1980CA1085461A1 Electronic kwh meter having internal power supply and error correction system
09/03/1980EP0015120A1 Meters for measuring electrical energy consumption
08/1980
08/20/1980EP0014517A1 Kilowatt-hour meter provided with means for indicating any tampering to prevent correct recordal of energy consumption by the meter
08/19/1980US4218737 Revenue metering system for power companies
08/19/1980CA1084116A1 Digital watts transducer
08/12/1980US4217546 Electronic energy consumption meter and system with automatic error correction
08/12/1980US4217545 Electronic type polyphase electric energy meter
08/06/1980EP0014038A1 Kilowatt-hour meters
08/05/1980US4216527 System for metering electrical energy with remote time signal correlation
07/1980
07/29/1980US4215413 Measuring device for integral values formed over a time span
07/15/1980US4213182 Programmable energy load controller system and methods
07/09/1980EP0013025A1 Long-term integrator for a low level voltage source
07/08/1980US4211911 Sandy fraction obtained as waste from combustion of brown coal as filler, lime as binder, cement
07/01/1980US4210937 Solid state power outage recording circuit
07/01/1980US4210152 Method and apparatus for measuring and controlling the output power of a shortwave therapy apparatus
06/1980
06/17/1980CA1079806A1 Power measuring apparatus
06/12/1980WO1980001206A1 Process for measuring electric power
06/10/1980US4207557 User electric energy consumption apparatus
06/03/1980US4206405 Variable rate measuring watt hour meter
05/1980
05/28/1980EP0011094A2 Device for measuring electric energy
05/20/1980US4204195 Meter terminal unit for use in automatic remote meter reading and control system
05/20/1980US4204194 Meter terminal unit for use in automatic remote meter reading and control system
05/20/1980CA1078018A1 Overload detecting scheme for an electric propulsion system for traction vehicles
05/13/1980CA1077568A1 Electric power to dc signal converter
04/1980
04/22/1980US4199717 Time of day demand metering system and method
04/22/1980US4199696 Multiplier using hall element
04/08/1980US4197582 Auxiliary power supply and timer arrangement for time registering multifunctional electric energy meters
04/08/1980US4197451 Totalizer apparatus for recording two data inputs on a single channel
04/08/1980CA1075307A1 Power factor control system for ac induction motors
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