Communications: electrical – Watercraft alarm or indicating systems – Navigation guides
Patent
1986-11-04
1988-08-09
Caldwell, Sr., John W.
Communications: electrical
Watercraft alarm or indicating systems
Navigation guides
441 3, 441 12, 441 16, G08G 300, B63B 2202
Patent
active
047631260
ABSTRACT:
A buoy for marine vessels that is responsive to a transmitted RF signal of a set frequency consisting of an RF receiver disposed within the buoy and tuned to a set frequency of the transmitted RF signal and an antenna coupled to the input of the RF receiver. A switching circuit is coupled to the RF receiver, and a lamp is disposed on the buoy so that when the RF receiver receives a signal at the set frequency, it will operate said switching circuit and turn on said lamp. The buoy may be a pick-up buoy having an elongated stem on the top of the buoy, and containing the antenna. The lamp can also be mounted on the end of the antenna. A sound source coupled to the output of the switching circuit can sound an audible signal in response to the transmitted RF signal.
REFERENCES:
patent: 1669055 (1928-05-01), Hogg
patent: 2355013 (1944-08-01), Rochestie
patent: 2397844 (1946-04-01), Dewhurst
patent: 2448713 (1948-09-01), Hansell
patent: 3084354 (1963-04-01), Lunenshloss
patent: 3181354 (1965-04-01), Zoglio
patent: 3329981 (1967-07-01), Orsino
patent: 3603952 (1971-09-01), Smith
patent: 4099282 (1978-07-01), Townsend
Caldwell Sr. John W.
Oberley Alvin
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