Long range alternating current phasing voltmeter

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Polyphase

Reexamination Certificate

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Details

C324S126000

Reexamination Certificate

active

07109699

ABSTRACT:
A long-range wireless phasing voltmeter having a high impedance AC voltmeter in series between two high impedance probes. Shielding surrounds and electrically isolates the voltmeter and probes that communicate wirelessly via a pair of frequency translators, thus eliminating the cable customarily used to connect the probes and enabling measurements of the voltages, voltage differences, phases and phase difference between two conductor that may be miles apart. The signal transmitted from the first probe to the second may be analog or digital and is automatically compensated to correct the synchronization of the transmitted signal for the delay required to send it via the two translators.

REFERENCES:
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patent: 4316254 (1982-02-01), Levin
patent: 4709339 (1987-11-01), Fernandes
patent: 5136234 (1992-08-01), Shaw
patent: 5270660 (1993-12-01), Werner et al.
patent: 5291124 (1994-03-01), Hoffman et al.
patent: 6272329 (2001-08-01), Sawchuk
patent: 6459252 (2002-10-01), Bierer
patent: 6617840 (2003-09-01), Bierer
patent: 6642700 (2003-11-01), Slade et al.
patent: 6734658 (2004-05-01), Bierer
patent: 2002/0135353 (2002-09-01), Bierer
patent: 06003374 (1994-01-01), None
Innovative Technologies for the Energy Industry from http://www.avistarinc.com
ews/ dated May 2, 2005.
Accurate Phase Identification from http://www.avistarinc.com
ews/ dated May 2, 2005.
Innovative Technologies for the Energy Industry (article entitled Avistar Introduces AP-10 Phase Identification System dated Apr. 2, 2004, (Author unknown) from http://www.avistarinc.com
ews/PressRelease—040204.html dated May 2, 2005.
Innovative Technologies for the Energy Industry (article entitled THE AP-10 System: Accurate Phase Indentification . . . Anywhere from http://www.avistarinc.com/technologies/AboutPhase—AP10.html dated May 2, 2005.

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