Distress signalling device

Details Distress signalling device Distress signalling device

1977-04-15

1979-07-31

Caldwell, Sr., John W.

Communications: electrical

Systems

Periodic or flashing

250199, 325116, 325115, 325166, 340345, 340366F, G08B 538, H05B 4124, H05B 4134

Patent

active

041632206

ABSTRACT:
An S-O-S distress signalling device for flashing a lamp, consisting of a decade binary counter, a signal converter circuit connected to the counter and a timer having its output coupled to the lamp and the input of the counter. The counter and converter circuits provide three charging paths to the timer, so that rapid flashes will be produced to simulate the "S" code and two charging paths to the timer to simulate the "O" code at a slower repetition rate. Between each S-O-S signal, only one charging path is provided, to slow down the timer to define the interval between the coded messages.

REFERENCES:
patent: 2825803 (1958-03-01), Newbrough
patent: 3088099 (1963-04-01), Du Vall
patent: 3181135 (1965-04-01), Zoglio
patent: 3230454 (1966-01-01), Van Burkleo
patent: 3475619 (1969-10-01), Campbell
patent: 3668684 (1972-06-01), Johnson et al.
patent: 4042919 (1977-08-01), Patty
patent: 4124842 (1978-11-01), Bachelor

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