Electronic timepiece

Details Electronic timepiece Electronic timepiece

1975-05-14

1977-05-03

Witkowski, Stanley J.

58 855, 328 17, G04B 2708, G04C 300

Patent

active

040206262

ABSTRACT:
An electronic timepiece comprises a quartz oscillator, a dividing circuit, a preset circuit connected to receive and divide the output pulses of the oscillator and a control circuit. The dividing circuit includes a first counter and a second counter. The preset circuit includes a setting circuit connected to an externally actuated switch, a memory circuit memorizing the number of switching times of the setting circuit caused by actuation of the switch, and a control setting circuit for presetting the complement of the memorized content of the memory circuit in the first counter. The second counter receives outputs from flip-flops constituting the first counter and produces an output which is applied to the control circuit which in turn produces an adjustment signal to the control setting circuit. The variation of the frequency of the quartz oscillator is precisely adjusted by changing the dividing ratio of said dividing circuit.

REFERENCES:
patent: 3777471 (1973-12-01), Koehler et al.
patent: 3810356 (1974-05-01), Fujita
patent: 3812669 (1974-05-01), Wiget
patent: 3817023 (1974-06-01), Kashio
patent: 3823545 (1974-07-01), Vittoz et al.
patent: 3834152 (1974-09-01), Nishimura et al.
patent: 3852951 (1974-12-01), Sauthier
patent: 3855782 (1974-12-01), Nishimura et al.
patent: 3886726 (1975-06-01), Williams et al.
patent: 3889459 (1975-06-01), Lu
patent: 3889460 (1975-06-01), Yasukawa et al.
patent: 3895486 (1975-07-01), Hammer et al.
patent: 3913312 (1975-10-01), Numabe
patent: 3922844 (1975-12-01), Sakamoto
patent: 3931703 (1976-01-01), Scherrer et al.

Affiliated with

Also associated with

Rating

Electronic timepiece does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic timepiece, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic timepiece will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-338263