Horology: time measuring systems or devices – Regulating means – For setting
Patent
1995-06-06
1998-01-27
Roskoski, Bernard
Horology: time measuring systems or devices
Regulating means
For setting
G04C 900
Patent
active
057128324
ABSTRACT:
An electronic clock for indicating a time including a source oscillator having a predetermined frequency, a frequency divider circuit for dividing down the frequency of the source oscillator, an input device for generating a continuous input signal when actuated, an input control circuit for detecting the input signal from the input device, an input time counting circuit for counting a period of time from the clock signal during which the input control circuit detects a continuous input signal from the input device, an input time detecting circuit for detecting when the period of time counted by the input time counting circuit equals at least one predetermined value, and a setting increment/decrement control circuit to establish successive predetermined periods of time determined by at least one predetermined value, the rate at which the set time is incremented or decremented is varied in each predetermined period of time by changing a value of a unit of time to be added to or subtracted from the set time.
REFERENCES:
patent: 3988597 (1976-10-01), Yamaguchi
patent: 4030283 (1977-06-01), Sauthier et al.
patent: 4365898 (1982-12-01), Wakai
patent: 4415276 (1983-11-01), Ikehata et al.
patent: 4431314 (1984-02-01), Portmann
Roskoski Bernard
Seiko Epson Corporation
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