Communications: electrical – Selective – Monitoring in addition to control
Patent
1976-11-15
1977-12-20
Farley, Richard A.
Communications: electrical
Selective
Monitoring in addition to control
G01S 970, G01S 764
Patent
active
040644782
ABSTRACT:
Disclosed is a flasher display type fish finder wherein the output from a master digital oscillator is converted by a first frequency divider into a pulse train which in turn is converted by a serial-to-parallel converter into scanning or parallel pulses which are sequentially applied to a received- or echo-signal output device; and echo signal is applied through a received- or echo-signal distribution circuit to the output device; and SCRs to each which are impressed simultaneously both the scanning or parallel pulse and the echo signal is enabled to conduct and a light emitting element connected to the conducted SCR is turned on, displaying targets.
REFERENCES:
patent: 3732945 (1973-05-01), Lavigne
patent: 3750095 (1973-07-01), Olesen
patent: 3835447 (1974-09-01), Lowrance
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