Horology: time measuring systems or devices – Chronological – With simultaneous time indicating means
Patent
1978-06-14
1980-07-01
Jackmon, Edith S.
Horology: time measuring systems or devices
Chronological
With simultaneous time indicating means
368 66, 368 72, 368101, 368109, G04F 1000, G04C 1902
Patent
active
042099722
ABSTRACT:
A digital electronic timepiece having a multi-digit digital display for displaying the time count in a time counter which receives a divided down time signal from a time base signal generator. At least one settable time counter for storing a count corresponding to a desired time period is provided which is receptive of a time signal for decrementing the count thereof to zero. A plurality of display driving signals, each corresponding to one digit of display are generated wherein the display signals of successive digits are phase delayed with respect to each other and the frequency thereof is sufficiently low to produce visible flickering of display. Upon the sensing of the zero count in the timer counter, the display which is normally non-flickering, is driven with the display driving signals to produce a sequential flickering of the digits of the time display to provide a visual indication of the lapse of the desired time period.
REFERENCES:
patent: Re29637 (1978-05-01), Takamune et al.
patent: 3813533 (1974-05-01), Cone et al.
Adams Bruce L.
Burns Robert E.
Jackmon Edith S.
Kabushiki Kaisha Daini Seikosha
Lobato Emmanuel J.
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