Analog electronic watch that indicates the day of the week and t

Details Analog electronic watch that indicates the day of the week and t Analog electronic watch that indicates the day of the week and t

1988-03-16

1989-03-21

Roskoski, Bernard

Horology: time measuring systems or devices

With calendar indicator

Movable ring or disk

368 35, G04B 1924, G04B 1920

Patent

active

048150517

ABSTRACT:
The watch includes a time-keeping circuit, a first motor, hands driven by the motor to display the time, an index that moves forward by 1/35th of a revolution per 24 hours, a stationary graduation having inscribed thereon 35 days of 5 consecutive weeks, a mobile graduation divided into 35 parts and bearing numbers 1 to 31 for the ordinals of the month, a second motor that drives the mobile graduation in steps of 1/35th of a revolution, a calendar circuit issuing a signal that is representative of the month and a signal that is representative of the year, and a correction circuit connected to the calendar circuit and issuing a control signal to the second motor. At the end of each month, the mobile graduation is moved by the second motor through N steps (N=4,5,6 or 7) such that number 1 thereon comes to lie opposite the index at the beginning of the following month. The two graduations provide the correspondence between the days of the week and the ordinals of the month for the current month whereas the index indicates the actual day of the week and ordinal of the month.

REFERENCES:
patent: 249536 (1881-11-01), Lewis
patent: 422090 (1890-02-01), Miller
patent: 3452535 (1969-07-01), Cabantous et al.

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