Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1974-09-09
1976-07-20
Rolinec, R. V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
310 11, G01R 3306, G21D 702
Patent
active
039709221
ABSTRACT:
A Hall voltage device including means for generating a magnetic field and a rotatable box mounted within the field in the air gap defined by the means. The box is arranged to receive a fluid including charged particles and comprises appropriately located electrodes cooperating with the fluid and means for rotating the box. An end face of the box is provided with a central aperture around the axis of rotation for introducing the fluid into the box. In another embodiment the apparatus comprises a pivot having two parts, each part connected to a respective electrode of the box. Each part contacts an amount of mercury contained in a reservoir. The two reservoirs are connected to a voltage meter. Cooling means for the mercury reservoir is also disclosed.
REFERENCES:
patent: 3348487 (1967-10-01), Miller
Spierings Ferdinand Hubert Franciscus Gerardus
Karlsen Ernest F.
Rolinec R. V.
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