Communications: electrical – Vehicle position indication – At remote location
Patent
1991-02-19
1992-09-01
Ng, Jin F.
Communications: electrical
Vehicle position indication
At remote location
340539, 340989, G08G 1123
Patent
active
051443015
ABSTRACT:
A system for alerting school children that a school bus is moving toward a nearby bus stop, thus prompting the children to leave their residences to reach the bus stop at or before the bus arrives at the stop. The system includes a radio transmitter on the bus and a radio receiver in each home along the bus route. Each receiver has a first warning light that begins to emit a signal when the school bus is a relatively great distance away from the home, and a second sound-emitting speaker that begins to emit an audible signal when the school bus is a relatively short distance away from the home, e.g. one quarter mile.
REFERENCES:
patent: 3898514 (1975-08-01), Takahashi
patent: 3927571 (1975-12-01), Athey
patent: 4325057 (1982-04-01), Bishop
patent: 4713661 (1987-12-01), Boone et al.
Jackson Timothy C.
Parks Jeffrey G.
Ng Jin F.
Oda Christine K.
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