Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se
Reexamination Certificate
2005-01-07
2008-07-08
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
C324S072000, C324S129000, C324S686000
Reexamination Certificate
active
07397233
ABSTRACT:
A device for measuring alternating voltage in a conductor under test using a first set of capacitive voltage sensors32a-fmounted on an electrically insulating support member. The sensors are disposed on the support member at spaced intervals along a first notional circle and are connected in parallel between an inner signal conductor33and a zero voltage reference conductor37. A second set of capacitive voltage sensors34a-fare mounted on the support member at spaced intervals along a second notional circle and are connected in parallel between an outer signal conductor35and the reference conductor37. The support member is configured to allow a conductor under test38to be introduced into the interior of the device so that the sensors surround the axis of the conductor. Each sensor has a signal electrode48connected to the signal conductor and a reference electrode50connected to the reference conductor and is orientated with the signal electrode facing the conductor under test. The voltage in the conductor under test is derived as a function of the voltage across the signal conductor and the reference conductor.
REFERENCES:
patent: 4041373 (1977-08-01), Maringer
patent: 4052665 (1977-10-01), Gruenwald
patent: 4090130 (1978-05-01), Willenbecher, Jr.
patent: 5473244 (1995-12-01), Libove et al.
Deb Anjan
Dole Timothy J
Maynard Jeffrey C.
Sorensen Thomas
Suparules Limited
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