Timekeeping rate regulator for crystal controlled watches and cl

Details Timekeeping rate regulator for crystal controlled watches and cl Timekeeping rate regulator for crystal controlled watches and cl

1993-07-20

1994-12-20

Roskoski, Bernard

Horology: time measuring systems or devices

Regulating means

For compensation

368200, 368201, G04B 1712

Patent

active

053751051

ABSTRACT:
An adjustable vibrations counter (20) and an elapsed time counter and switch (18) that select and adjust one second durations, the adjustment depending on whether the timekeeping rate of a watch or clock is fast or slow. The adjustable vibrations counter provides for an increase or decrease in the number of crystal (12) vibrations that are counted during each adjusted one second duration. The elapsed time counter and switch provides for the number of seconds that are selected for adjustment during each hour or day.
A slide switch (22) or other means for changing the number of crystal vibrations that are counted during an adjusted one second duration, thus providing the timekeeping rate regulation. A display (28) of the amount of timekeeping rate adjustment that has been entered into a watch or clock.

REFERENCES:
patent: 968235 (1910-08-01), Bonnet
patent: 1584528 (1926-05-01), Grainger
patent: 3540207 (1970-11-01), Keeler
patent: 4101838 (1978-07-01), Aihara et al.
patent: 4147022 (1979-04-01), Ichikawa
patent: 4763319 (1988-08-01), Descombs

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