Communications: electrical – Watercraft alarm or indicating systems – Navigation guides
Patent
1985-05-29
1987-03-03
Caldwell, Sr., John W.
Communications: electrical
Watercraft alarm or indicating systems
Navigation guides
340332, 340984, G08G 300, G08B 2300
Patent
active
046479295
ABSTRACT:
A navigation light control system that includes a network of navigation light control circuits interconnected and each control circuit further connected to operate at least one navigation light. Each control circuit includes a start circuit that provides an initiation signal upon the detection of a loss of sunlight. The initiation signal is input to a first timer that provides a begin signal after a preselected time. The begin signal is input to a second timer that provides an operation signal to a lamp driver circuit for flashing one or more of the lamps in response. The control circuit further includes a coupling circuit that couples the control circuits together in the network and receives a slave indication signal from one of the other control circuits that disables the first and second timers in response and further provides the slave indication signal to the lamp driver to flash one or more of the lamps. The coupling circuit also includes the means to transmit the operation period signal from the second timer as a slave indication signal to the network if the operation period signal from the second timer occurs before a slave indication signal from any of the other control circuits in the network is received. In a further embodiment, a code signal generation circuit is included that provides a predetermined sequence of activation signals to flash the lamps of the network in a Morse code sequence.
REFERENCES:
patent: 2674726 (1954-04-01), Williams
patent: 3781853 (1973-12-01), Jacobs
Caldwell Sr. John W.
Queen Tyrone
The Seanav Corporation
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