Digital clock for giving acoustic time-indicating signals at pre

Horology: time measuring systems or devices – Chronological – With simultaneous time indicating means

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Details

368251, 368273, G04B 2102, G04B 1916

Patent

active

048963089

ABSTRACT:
A digital clock for giving acoustic time-indicating signals having an oscillator, a time integrated circuit driven by the oscillator, a first display element connected to the time integrated circuit to show hour and minute and, a second display element connected to the time integrated circuit to show a day among a week. A minute and a hour decoders are connected to the first display element to convert signals into a form of binary code. A memory unit receives the signals from the minute and hour decoders. A setting circuit has a number of flip-flops and control switches to be connected to inputs of the memory unit to pre-set a moment for giving acoustic time-indicating signals. An acoustic generator and a driving interface are connected to respective outputs of the memory unit and are driven by the memory unit to output the time-indicating signals.

REFERENCES:
patent: 4293940 (1981-10-01), Noguchi et al.
patent: 4370069 (1983-01-01), Nomura
patent: 4459036 (1984-07-01), Sado et al.
patent: 4472065 (1984-09-01), Goodman
patent: 4472069 (1984-09-01), Yamamoto

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