Method and apparatus for simultaneously actuating navigational lanterns
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United States of America Patent
Stats
-
Oct 28, 1986
Grant Date -
N/A
app pub date -
Jul 30, 1984
filing date -
Jul 30, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for causing a plurality of navigational lanterns, each equipped with an independent light sensing device and connected to a common synchronizing terminal, to actuate simultaneously at dusk, and deactuate simultaneously at dawn. The light sensing device senses the three levels of day, twilight and night. When a sensing device senses day, the connected lantern is disabled from flashing and is disabled from sending a synchronizing signal to other lanterns to flash. When a sensing device senses twilight, the connected lantern is enabled to receive the synchronizing signal, but is disabled from sending a synchronizing signal. When the sensing device senses night, the connecting lantern is enabled and a synchronizing signal to flash is sent to all of the lanterns.
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Cited Art Landscape
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