Electricity: measuring and testing – Testing potential in specific environment – Voltage probe
Patent
1986-11-13
1989-06-13
Pellinen, A. D.
Electricity: measuring and testing
Testing potential in specific environment
Voltage probe
324450, 324 725, G01R 3102
Patent
active
048395811
ABSTRACT:
A hermetically sealed, electrically insulative enclosure (A) is surrounded by a Faraday cage (B). At least one electrode (C) is disposed within the hermetically sealed enclosure. The volume of the enclosure is selectively altered such that an initial charge density in the neighborhood of electrod changes, which changes the electrode potential. The change causes a current to flow to or from the electrode which returns the electrode potential and the electrode surrounding space charge toward an equilibrium condition. In one embodiment, a current measuring circuit (D) is disposed between the electrode and the Faraday cage to derive a measure of the current flow therebetween. In another embodiment, a like electrode is disposed within another hermetically, sealed insulative enclosure which is shielded by the same or another Faraday cage. In the second embodiment, the measuring circuit measures the current flow between the two isolated electrodes.
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"An Ungrounded
Fay Robert J.
Kocovsky, Jr. Thomas E.
Pellinen A. D.
Wysocki A. Jonathan
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