Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-04-26
2005-04-26
Hofsass, Jeffery (Department: 2636)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S561000, C340S870020, C340S870030
Reexamination Certificate
active
06885302
ABSTRACT:
The present technology involves a method and apparatus for detecting and reporting magnetic fields in the proximity of a utility meter as an approach to determining tampering of such meter. The sensitivity level of the magnetic field sensors may be adjustable allowing either remote or local sensitivity adjustments to a magnetic field sensor to compensate for variations in the electromagnetic environments of different meter installation sites. Alternatively, the output of each magnetic field sensor may be connected to the input of an adjustable threshold circuit. When the output voltage of the magnetic field exceeds a predetermined threshold voltage, a magnetic event signal is generated. Threshold adjustments to the adjustable threshold circuit may be performed locally at the meter site or remotely from a station. The output of each magnetic field sensor may be monitored by a locally or remotely programmable magnetic sensor output monitor. Such magnetic sensor output monitor generates a magnetic event signal when a predetermined number of magnetic sensors have been activated.
REFERENCES:
patent: 4677380 (1987-06-01), Popovic et al.
patent: 4707679 (1987-11-01), Kennon et al.
patent: 4752733 (1988-06-01), Petr et al.
patent: 4996870 (1991-03-01), Deutsch
patent: 5473322 (1995-12-01), Carney
patent: 5488565 (1996-01-01), Kennon et al.
patent: 5910774 (1999-06-01), Capriotti et al.
patent: 6073169 (2000-06-01), Shuey et al.
patent: 6373399 (2002-04-01), Johnson et al.
Martin Brent
Seal Brian Keith
Dority & Manning
Hofsass Jeffery
Itron Electricity Metering, Inc.
Previl Daniel
LandOfFree
Magnetic field sensing for tamper identification does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic field sensing for tamper identification, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic field sensing for tamper identification will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3428498