Communications: electrical – Continuously variable indicating – With meter reading
Patent
1992-09-21
1994-05-31
Peng, John K.
Communications: electrical
Continuously variable indicating
With meter reading
34082534, 34082549, 34082569, 34082572, 340568, 340573, 342386, 235380, 455343, G08C 1900, G01S 100
Patent
active
053173090
ABSTRACT:
A dual mode electronic identification system using a tag which has a RF receiver and transmitter contained therein. In the first mode the tag responds to an interrogation signal by transmitting identification data to the interrogator. In the second mode the tag periodically transmits an identification beacon signal to a directional sensing antenna which uses the signal to compute the position of the tag. The power supply for the tag operates from an internal battery or from power received from a portal signal via a tag receiving antenna. The battery can be automatically turned off when the tag is in the portal area and the unit can be shifted into the battery operated beacon mode when the tag is removed from the portal area.
REFERENCES:
patent: 3439320 (1969-04-01), Ward
patent: 3755781 (1973-08-01), Haas et al.
patent: 3755782 (1973-08-01), Haas et al.
patent: 3859624 (1975-01-01), Kriofsky et al.
patent: 3898619 (1975-08-01), Carsten et al.
patent: 4225953 (1980-09-01), Simon et al.
patent: 4384288 (1983-05-01), Walton
patent: 4471345 (1984-09-01), Barrett, Jr.
patent: 4495496 (1985-01-01), Miller, III
patent: 4514731 (1985-04-01), Falck et al.
patent: 4533871 (1985-08-01), Boetzkes
patent: 4598272 (1986-07-01), Cox
patent: 4598275 (1986-07-01), Ross et al.
patent: 4604618 (1986-08-01), Akiba et al.
patent: 4656463 (1987-04-01), Anders et al.
patent: 4667193 (1987-05-01), Cotie et al.
patent: 4688026 (1987-08-01), Scribner et al.
patent: 4691202 (1987-09-01), Denne et al.
patent: 4742335 (1988-05-01), Vogt
patent: 4814742 (1989-03-01), Morita et al.
patent: 4814751 (1989-03-01), Hawkins et al.
patent: 4837568 (1989-06-01), Snaper
Mandel Alan F.
Neuner James A.
Ravas Richard J.
Schlotterer John C.
Vercellotti Leonard C.
Hill Andrew
Jarosik G. R.
Peng John K.
Westinghouse Electric Corp.
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