H - Electricity
04
B
325/1
H04B 9/00 (1980.01)
Patent
CA 1142594
ABSTRACT OF THE DISCLOSURE A communications link between land vehicles and a stationary vehicle service installation is formed by a modulated optical link between transmitters moun- ted on the vehicles and receivers at the installation, the radiation and reception patterns of said trans- mitters and receivers being restricted so that commun- ication is only possible between a particular receiver and the transmitter on a vehicle when that vehicle is within a restricted range of locations. To prevent interference between different receiver/transmitter pairs, the receivers are mounted at a different level from the transmitters, and the transmitters and receivers have asymmetric fields of radiation and reception.
383931
Imperial Oil Limited
Ridout & Maybee Llp
LandOfFree
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