Horology: time measuring systems or devices – With calendar indicator – Movable drum
Patent
1992-04-24
1993-12-28
Miska, Vit W.
Horology: time measuring systems or devices
With calendar indicator
Movable drum
368 80, 368222, G04B 1902, G04B 1920
Patent
active
052746160
ABSTRACT:
A perpetual calendar structure comprising an outer casing, an interior frame, a driver, a clock control and a power source including a battery, in which the outer casing has windows for display of date, month, weekday and time, the interior frame in incorporated with a date display set, a month display set, and a weekday display set each aligning with their respective windows, the clock control is aligned with the time display window, and is used to give a signal at the end of each rotation of a cycle of 12-hour period to control the driver to cause a weekday driver to turn the weekday display set to next plate showing a weekday and A.M. or P.M., a date driver to turn the date display set to next plate showing a date after every two weekday plates are turned, and a month driver to turn the month display set to next plate showing a month after 31 date display plates are turned automatically without the need of manual control.
REFERENCES:
patent: 2670590 (1954-03-01), Anderson
patent: 2836956 (1958-06-01), Chadwick
patent: 2927418 (1960-03-01), Bauer
patent: 3400510 (1968-09-01), Schwarzer et al.
patent: 3708972 (1973-01-01), Koide
patent: 4027469 (1977-06-01), Yaguinuma
patent: 4122659 (1978-10-01), Hashimoto
patent: 4193256 (1980-03-01), Tobeta et al.
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