Patents
Sitemap › G01 - Measuring; Testing › G01R - Measuring electric variables; Measuring magnetic variables › G01R 29 - Arrangements for measuring or indicating electric quantities not covered by groups
Patents for G01R 29 - Arrangements for measuring or indicating electric quantities not covered by groups (11,937)
01/1982
01/12/1982US4310771 Method for transferring power in a synchronous mode to a motor bus
01/05/1982US4309661 Device for measuring quantity of electric charges on electrified fluid
01/05/1982CA1115783A1 Apparatus and method for egg baseline shift detecting
12/1981
12/16/1981EP0041809A2 Digital phase sequence detector
12/08/1981US4305153 Method for measuring microwave electromagnetic fields
12/08/1981US4305010 Excessive duty cycle and pulse width limiter
12/02/1981EP0040952A1 Precision time duration detector
11/1981
11/24/1981US4302738 Noise rejection circuitry for a frequency discriminator
11/17/1981US4301406 Microwave warning device
11/17/1981US4301405 Interval-to-rate converter
11/17/1981CA1112723A2 Detection system for lightning
10/1981
10/27/1981US4297640 Apparatus for measuring the electric charge condition of non-conductive particles in a mildly conductive electrolyte
10/27/1981CA1111516A1 Sample-and-hold circuit with current gain
10/27/1981CA1111511A1 Pulse width measurement circuitry
10/21/1981EP0038307A1 Electronic phase sequence indicator for three-phase electric systems
10/21/1981EP0038259A1 Process for detecting faults of a phase in an electric energy distribution system
10/13/1981US4295140 Faraday rotation measurement method and apparatus
10/07/1981EP0037303A1 Linear pulse pedestal clipping circuit having an adjustable threshold
09/1981
09/29/1981US4292638 Augmented radiometric system
09/23/1981EP0036354A1 Device for the acquisition and for taking the mean value of samples of a noise affected periodic signal
09/09/1981EP0035385A2 Sequence filters for determining the symmetrical components of multiphase AC power systems
08/1981
08/31/1981EP0026786A4 Method and apparatus for measuring electrostatic charge density.
08/25/1981US4286208 Fluid interface detector
08/18/1981US4284939 Device for detecting opposite phase and open phase
08/18/1981CA1107398A1 Pulse repetition interval autocorrelator system
07/1981
07/28/1981US4281287 Having a coating of ferric oxide on a polyester substrate
07/28/1981US4281284 Method and apparatus for electrically contacting a material specimen to the conductors of a coaxial cable
07/15/1981EP0031871A1 High resolution superconductive sampling system
07/14/1981US4278937 Circuit arrangement for monitoring the phase sequence of a rotary field
07/14/1981US4278933 Means and method for determining susceptibility to radiated energy
07/14/1981CA1105109A1 Test set for measuring jitter distortion of data pulses
07/07/1981US4277745 Personal electric field exposure monitor
07/07/1981US4277744 Apparatus for measuring electric and magnetic fields
07/07/1981US4277741 Microwave acoustic spectrometer
07/01/1981EP0031043A1 Electrophotographic copier including photoconductor charge sensing means
06/1981
06/16/1981US4274048 Three-dimensional measurement of radiant energy scattering characteristics with a turntable-type scanning interferometer
06/10/1981EP0030056A1 Influence probing arrangement and method for its realization
06/09/1981US4272765 Microwave leakage detectors
06/09/1981US4272731 Thin film resistor microwave noise generator
06/09/1981US4272720 Lightning discharge identification system
06/09/1981US4272719 Electric field intensity measuring apparatus
06/02/1981US4271449 Method and apparatus for protecting alternating current circuits
06/02/1981US4270391 Frequency-responsive filter for flowmeter transmission system
05/1981
05/26/1981US4270156 Electronic synchronization monitor
05/26/1981US4270090 D.C. Electrostatic voltage follower having ion-coupled probe
05/26/1981CA1101933A1 Detection system for lightning
05/19/1981US4268480 Device for measuring a physical operating characteristic of an ozonizer
05/19/1981CA1101510A1 Noise detecting circuit
05/12/1981US4267600 Modulation monitoring apparatus
05/12/1981US4267511 Surface potentiometer
05/12/1981CA1101080A1 Duration range determination of incursions by a variable signal
05/12/1981CA1101067A1 Symmetrical component sequence filter
05/05/1981CA1100625A1 Plane wave lens
04/1981
04/28/1981CA1100234A1 Channel depletion boundry modulation magnetic field sensor
04/21/1981US4263549 Apparatus for determining differential mode and common mode noise
04/21/1981US4263548 Midpoint measuring circuit
04/21/1981US4263545 Method of testing pulse delay time
04/15/1981EP0026786A1 Method and apparatus for measuring electrostatic charge density
04/14/1981US4262254 Balanced corona electrostatic field sensor
04/14/1981US4261660 Surface potentiometer for use in an electrostatic copier
04/14/1981CA1099409A1 Charge transfer device differencing circuit
03/1981
03/18/1981EP0025086A2 Method and arrangement for measuring pulse separation of periodic pulse pairs
03/18/1981EP0025077A1 A two-wire remote measuring system
03/17/1981US4256972 Power transfer relay circuitry and method of phase measurement
03/10/1981US4255750 Multiple cell electromagnetic radiation test system
03/10/1981US4255702 Measurement of radiant energy scattering characteristics with a turntable-type scanning apparatus
02/1981
02/24/1981US4253092 Microwave leakage detector
02/24/1981US4253057 Compensation indicator for attenuation probe
02/17/1981US4251846 Apparatus for sensing short circuit faults in alternating current supply lines
02/11/1981EP0023708A1 Overvoltage analyzer
02/03/1981US4249131 Method and apparatus for measuring electrostatic charge density
01/1981
01/27/1981US4247949 Signal strength detecting circuit
01/27/1981US4247948 Automatic modulation control in transmitter
01/13/1981US4245190 Lightning detection system utilizing triangulation and field amplitude comparison techniques
12/1980
12/30/1980CA1092652A1 Measuring apparatus for measuring a charging degree of liquid
12/23/1980US4241306 Test fixture having switching means for facilitating transformer turns ratio testing
12/23/1980US4241262 Circuit for measuring the charge stored in a charge-coupled device
12/16/1980US4240029 Apparatus for counting particles in a liquid suspension
12/10/1980EP0020071A1 Missing pulse detector
12/10/1980EP0020047A2 Method and apparatus for fault identification in electric power transmission systems
12/02/1980US4237420 Temperature sensing circuit
11/1980
11/25/1980US4236115 Synchronization detecting and indicating system
11/25/1980US4235107 Method and arrangement for measuring the physical temperature of an object by means of microwaves
11/18/1980US4234845 Automatic control of arming signal for time interval measurements
11/11/1980US4233525 Electronic circuit for use in a digital circuit which prevents passage of pulses having a pulse width narrower than a predetermined value
11/04/1980US4232319 Broadband transmitting antenna for test chamber
11/04/1980US4231374 Procedure and device for the detection of extraordinary events in a series of essentially periodically recurring normal events
10/1980
10/29/1980EP0017966A1 Apparatus for evaluating physiological, essentially periodical pulse trains
10/16/1980WO1980002200A1 Method and apparatus for measuring electrostatic charge density
10/14/1980CA1087688A1 Method and apparatus for testing crystal elements
10/07/1980US4227147 Electromechanical parametric amplifier for measurement of electric fields
10/07/1980US4226245 System for detecting heart pacemaker pulses
10/07/1980CA1087247A1 Electrostatic charge measurement
09/1980
09/16/1980US4223270 Multiplexed CCD pulse width discriminator
09/16/1980US4223267 Circuit arrangement for measuring pulse widths
09/16/1980US4223220 Method for electronically imaging the potential distribution in an electronic component and arrangement for implementing the method
09/09/1980US4222007 Apparatus for detecting and measuring an electrostatic field
09/09/1980CA1085449A1 Filter excitation circuitry
09/02/1980US4220854 Method for the contactless measurement of the potential waveform in an electronic component and apparatus for implementing the method
09/02/1980US4220853 Method for the contactless measurement of the potential waveform in an electronic component and arrangement for implementing the method
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