Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-01-03
1976-03-30
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 59, 324 60CD, G01R 2700
Patent
active
039477606
ABSTRACT:
A method and means for measuring the electric properties of capacitor, inductor and resistor elements is described. The element to be measured and a reference element are connected in series, and standard A.C. voltage is applied to one end of the series circuit whereas a variable voltage is applied to the other end of said circuit. The variable voltage is controlled in order to zero the voltage or the current at the common junction of both the element to be measured and the reference element. Said standard voltage and said variable voltage are rectified, and the generated D.C. signals are used for charging integrator capacitors. These capacitors are then discharged and the ratio of charging and discharging time is a measure of the resistance, capacitance and inductance, respectively, of the unknown element. Dielectric and magnetic dissipation factors may be measured in a similar manner.
REFERENCES:
patent: 3018438 (1962-01-01), Mustert
patent: 3319162 (1967-05-01), Sattinger et al.
patent: 3771050 (1973-11-01), Golahny et al.
Kyo Takeshi
Maeda Koh-ichi
Noguchi Hitoshi
Hewlett--Packard Company
Jones Allston L.
Krawczewicz Stanley T.
Smith A. C.
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