Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Meter protection or fraud combatting
Patent
1993-12-07
1995-06-06
Nguyen, Vinh
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Meter protection or fraud combatting
340565, 340568, G01R 2106, G08B 2100
Patent
active
054225655
ABSTRACT:
A method and system is disclosed for indication and prevention of tampering with an electricity meter having control circuitry for automatic remote reading. The control circuitry, provided externally of the meter in a base or base extension, to which the meter is connected, is also used for tamper detection. Embodiments of the invention include use of optical sensing, voltage detection and proximity detection. Ambient light sensing may be performed to detect separation of the meter from the external receptacle. Reflected light to a reflective surface of the meter is sensed to determine if the meter is properly engaged. Presence of a meter connection plug element may be sensed either optically or by position responsive switch. Voltage of the utility supply and meter user output may be monitored to determine tampering.
REFERENCES:
patent: 4331915 (1982-05-01), Fielden
patent: 4571691 (1986-02-01), Kennon
patent: 4665359 (1987-05-01), Goodwin
patent: 4727315 (1988-02-01), Jones
patent: 4833455 (1989-05-01), Bishop
patent: 5017877 (1991-05-01), Haus, Jr.
patent: 5086292 (1992-02-01), Johnson et al.
patent: 5227668 (1993-07-01), Mutch et al.
Asman Sanford J.
Nguyen Vinh
Schlumberger Industries Inc.
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