Class 324/140D - Ratio

Subclass of Class 324 - Electricity: measuring and testing
No. of patents: 38
Last issue date: 10/04/2005

Number	Title	Issue Date
6952565	Communication terminal, automobile communication terminal, and automobile The present invention provides a communication terminal that enables precise communications with optimum receive sensitivity at any time regardless of any change in peripheral environments of an antenna thereof. The communication terminal including means for transmi...	10/04/2005
5737730	Measuring process for measuring chargeable electrical consumption from an electrical network and electronic electricity meter A process for measuring electricity consumption, especially suitable for small consumers, comprises the steps of continuously measuring consumer current, integrating the current with time to obtain a value (A.h) relating to consumption; adjusting the inte...	04/07/1998
5663933	Meter circuit The present invention relates to an electronic meter circuit for a time comparison measurement between two successive periodic events with which the signal time ratios between two times two successive events can be recognized by a simple method. The elect...	09/02/1997
5309093	Electronic speed signal ratio measuring apparatus for controlling operations A ratio measuring apparatus which allows continuous monitoring of two or more digital signals so as to yield an indication of the ratio of frequencies between such signals for use in process control. The apparatus includes a channel transfer circuit adapt...	05/03/1994
5289166	Voltage detector A voltage detector to sense deviations of instantaneous value of a monitored voltage from a desired value is provided. The system includes a reference voltage source for providing a reference voltage. A divider responsive to the monitored voltage and the ...	02/22/1994
5220276	Crest factor measurement device The crest value and RMS value of a signal are measured. The ratio of the two values, the crest factor, is calculated to provide a measure of the signal wave shape. The frequency range and accuracy of a commercially available RMS converter is improved by p...	06/15/1993
5119073	AC ripple meter An apparatus and method are disclosed for measuring and displaying the percentage of ac voltage ripple present on a direct current input voltage. In addition, the apparatus can be set to activate alarms and trip relays when the percentage of ac voltage ri...	06/02/1992
5058146	Digital comparator, digital ratiometer and amplitude analyzer incorporating such ratiometers Digital ratiometer and amplitude analyzer using such a ratiometer. It is possible to solve the problems of the calculation and display of the ratio of two or more quantities, provided that the latter are converted into frequencies. Counting registers are used ...	10/15/1991
5038099	Radial air-core gauge A radial type air-core gauge includes orthogonally positioned pairs of stator coils wound on independent coil forms spaced radially 90 degrees apart about a central cup of a gauge case. The cup houses a permanent magnet rotor which rotates about a shaft e...	08/06/1991
5034905	Divider circuit using analog-digital converter A circuit arrangement for dividing an input signal A by a signal B, for eple for use in localizing radiation detection, has a dividing analog-to-digital converter receiving an addition signal A+q×B as well as the divisor signal B to form the quotient (A...	07/23/1991
4988943	VSWR meter arrangement with a display output having a linear scale A VSWR meter arrangement with a linear scale. The VSWR display is made linear by inputting the Vforward and Vreverse signals to a first op amp-based circuit to provide a first output=K(Vf -Vr). The signals are a...	01/29/1991
4937520	Instrument to measure the errors of apparent power meters An instrument to determine, under actual field conditions, which type of VA demand meters are most appropriate for a particular consumer. The type of electrical load that the consumer places on an electrical supply system can introduce harmonics and phase...	06/26/1990
4890057	Instrument with crossed-coil type movable magnet An instrument with cross-coil type movable magnet which performs desired indication by A-D converting in accordance with the state of an object under measurement and applying to the crossed coils the current corresponding to a digital value after A-D conv...	12/26/1989
4774458	Magnetic device A first magnet is mounted for rotation near a cavity of a magnetizable body such that the first magnet has a null position influenced by magnetic interaction between said first magnet and at least two pole pieces of the magnetizable body. The magnetizable...	09/27/1988
4758774	Portable tester and related method for determining the primary winding to secondary winding current ratio of an in-service current transformer A portable tester for determining the primary winding to secondary winding current ratio of a current transformer while that transformer is in service, including a current probe having a split core positionable around an active power line supplying curren...	07/19/1988
4758784	Air core gauge with zero pointer return related application An air core gauge having orthogonally related coils that react with a rotor magnet to angularly position an indicating pointer, suitable for use as either a pressure,temperature, or fuel gauge. All-attitude pointer zero return is achieved with a stationar...	07/19/1988
4724393	Surface potential detector A surface potential detector of a non-contact type which comprises first and second detecting electrodes arranged in a separated manner from a measured surface so that charge variations are induced on the first and second detecting electrodes on the basis...	02/09/1988
4658211	Circuit for regulating the torque of ratio meters In order to maintain the torque of the ratio meter and the drive of amplifiers feeding it independently of the amplitudes of a sine signal voltage and a cosine signal voltage, a regulation is provided. The regulation makes use of two-quadrant voltage-cont...	04/14/1987
4635043	Level indication A level indication has a ratio-measurement mechanism whose measurement coil can be connected to a source of current (6) via a switch element (12). This switch element (12) is controlled by the output of a comparator (10) to the input side of which a volta...	01/06/1987
4479087	Standing wave ratio and power meter An apparatus for measuring the Standing Wave Ratio and the RF transmitted power is in a transmission line. The ratio of the reflected component over the incident component of the transmitted signal is indicated on a logarithmic dot bar readout driven by t...	10/23/1984
4424491	Automatic voltage imbalance detector A device for indicating and preventing damage to voltage cells such as galvanic cells and fuel cells connected in series by detecting sequential voltages and comparing these voltages to adjacent voltage cells. The device is implemented by using operationa...	01/03/1984
4405990	Apparatus for determining the ratio of two signal repetition rates A measurement circuit which is rendered insensitive to temperature and other environmental quantities comprising first and second electrically identical sensor elements (10, 12) which are alternately connected through multiplexed gates (G1, G2) into the t...	09/20/1983
4350441	Photometric apparatus and method A photometric system for determining the absorbance ratio, in a sample, of two different wavelength lights. First and second lights, each having a different wavelength, are passed through the sample in alternation with each other. The radiation intensity ...	09/21/1982
4320381	Gear ratio indicator For use in combination with "crash type" non-synchronous gear boxes, a gear ratio indicator which not only calculates actual ratio of transmission input shaft speed to output shaft speed, but also compares this determined ratio to the various available ge...	03/16/1982
4211971	Ratio meter for capacitive-type displacement converter A ratio meter adapted to determine the ratio of a first input signal representing the difference between two input voltages and a second signal representing the sum of both input voltages....	07/08/1980
4176314	Double integration method for measuring deviation of standard and reference analog quantities In a method of measuring electrical analog quantities, a first analog signal representing a first electrical analog quantity which is to be a reference is subtracted from a second analog signal representing a second electrical analog quantity which is to ...	11/27/1979
4155038	Automatic comparison calibration device with ratio determination Apparatus for comparing an unknown signal with a reference signal is adapted to determine their ratio and, where a variation exists, to compensate the unknown signal to achieve unity ratio. The apparatus includes circuit means connectable to the signals f...	05/15/1979
4085362	Check synchronism A check synchroniser for checking the synchronism between two alternating voltages comprises means for forming pulses corresponding to the frequency and phase of the two voltages to be synchronized, the width of the pulses depending upon the allowable fre...	04/18/1978
4076424	Multi-channel implicit ratio computer for sequential signals A multi-channel electrical signal ratioing circuit for a source delivering an electric analog pulse signal sequence having a broadened choice of ratio denominator terms provided by parallel-connected DC-coupled individual signal ratioing circuits each inc...	02/28/1978
4054836	Transformer ratio-arm bridge with improved balancing means A bridge circuit of the transformer ratio-arm type includes a feedback circuit that is responsive to the output winding of the transformer and that is connected to produce in the transformer a compensating magnetomotive force in such direction as to reduc...	10/18/1977
4045732	Device for sensing the operative status of electrical equipment The operative status of an electrical apparatus unit such as a television receiver, incorporating an AC-DC converter, and drawing a substantial amount of current is sensed while differentiating from the usage of a lower amount of current, as when operatin...	08/30/1977
4041395	Transmitter performance monitor and antenna matching system A system for detecting, indicating, and adjusting the degree of mismatch between a transmitter and an electrical transmission line, with additional measurement of transmitter performance parameters. This system uses a three-wire transmission line sensor t...	08/09/1977
4035720	Ion gauge system In the ion gauge system disclosed herein, the ion current obtained from an ion gauge tube is directly converted to a signal having a frequency proportional to the ion current so that a digital measurement of vacuum may be obtained. The ion current charges...	07/12/1977
4000463	Direct-reading decibel meter A digital display electronic meter apparatus is disclosed which is capable of displaying amplitude ratio measurements directly in decibels over its entire amplitude operating range....	12/28/1976
3981586	Continuously monitoring ratiometer An analytically significant ratio between timevarying magnitudes of signals is periodically monitored in recurring cycles which are each synchronized with a frequency generator. During every monitoring cycle, each signal relating to the numerator and deno...	09/21/1976
3955096	Implicit ratio computer for sequential signals An electrical signal ratioing circuit for a source delivering an electric analog pulse signal sequence having compensating means for removing the effects of background influences, such as amplifier signal offsets and extraneous illumination, and integrati...	05/04/1976
3953793	Optimal determination of signals affected by interference or disturbance The invention relates to a method and an arrangement for determining signals affected by disturbance or interference. The affected signals are continuously integrated, either directly or subsequent to suitable transformation thereof, from the very start o...	04/27/1976
3952248	D.C. voltage ratio measuring circuit A circuit sensitive to the ratio of the values of two voltages of fixed polarities and possibly variable magnitudes, including two identical voltage dividers respectively fed from one and the other of said voltages and a third divider fed from a constant ...	04/20/1976

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Class 324/140D - Ratio