Communications: electrical – Systems – Selsyn type
Patent
1987-02-02
1987-11-17
Griffin, Robert L.
Communications: electrical
Systems
Selsyn type
340310R, 34087002, 307 39, H04M 1104, G08B 2300
Patent
active
047076798
ABSTRACT:
An electric meter is provided with a magnetically sensitive switch and a means for detecting the activation of the switch. A program is provided for sensing, recording and transmitting the status history of the magnetically sensitive switch to a remote device. The electric meter is connected in signal communication with a power line communication system and provided with the capability of transmitting and receiving messages in conjunction therewith. The electric meter senses the presence of a strong magnetic field in the region of the electric meter and, if other appropriate flags are not set, this information is used to determine that an effort to tamper with the meter by using magnetic fields has occurred.
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Hayden Leland E.
Kennon Jerry M.
Griffin Robert L.
Hawranko G. E.
Kuntz Curtis
Westinghouse Electric Corp.
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