Method of setting time in digital clock and system therefor

Details Method of setting time in digital clock and system therefor Method of setting time in digital clock and system therefor

1986-10-06

1988-08-23

Roskoski, Bernard

Horology: time measuring systems or devices

Chronological

With manually actuated display

368 70, 368185, 368187, G04C 1700

Patent

active

047665785

ABSTRACT:
A digital timepiece operates in a normal mode and in a set mode for setting time. A keyboard is sequentially actuated for carrying out a switching operation, an entering operation to enter time data to be set, and an executing operation. A counter is connected to the keyboard for producing a first output when the entering operation is not initiated within a relatively short interval after carrying out the switching operation and producing a second output when a relatively long interval lapses after the initiation of the entering operation. A control circuit is connected to the keyboard and to the counter for switching from the normal mode to the set mode in response to the switching operation and for switching from the set mode to the normal mode in response to either of the first and second outputs. A register is connected to the keyboard and operates in the set mode for setting time in response to the executing operation according to the entered time data when the entering operation is completed within the relatively long interval.

REFERENCES:
patent: 3943696 (1976-03-01), Portmann et al.
patent: 3986040 (1976-10-01), Karklys
patent: 3994124 (1976-11-01), Fujita
patent: 4250571 (1981-02-01), Ebihara et al.
patent: 4257116 (1981-03-01), Asano et al.

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