Communications: electrical – Selective – Having indication or alarm
Patent
1981-06-08
1983-08-09
Groody, James J.
Communications: electrical
Selective
Having indication or alarm
250338, 34087028, 34082554, 455604, G08G 104, G08C 1700, H04B 900
Patent
active
043981720
ABSTRACT:
A vehicle monitor (10) apparatus for monitoring vehicles (14) in a monitoring location (17). A vehicle unit (12) mountable in a vehicle includes circuitry (21) for transmitting, on a continuous repetitive basis, information characterizing the vehicle and unique thereto. In addition, a monitoring unit (16) mountable at the monitoring location includes circuitry (33) for receiving information transmitted by the vehicle unit. Such monitoring circuitry includes an infrared light receiver (29) and a preamplifier with ambient light compensation circuitry (100) connected thereacross.
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patent: 4188618 (1980-02-01), Weisbart
patent: 4207468 (1980-06-01), Wilson
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patent: 4258421 (1981-03-01), Juhasz et al.
patent: 4325146 (1982-04-01), Lennington
Carroll Robert J.
Keller Roger A.
Lane E. James
Williams Freddie G.
Eaton Corporation
Grace C. H.
Groody James J.
Johnston R. A.
Lewis J. G.
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