Analog world watch

Details Analog world watch Analog world watch

1990-07-05

1993-08-17

Roskoski, Bernard

Horology: time measuring systems or devices

Plural time zones

368 22, G04B 1922

Patent

active

052375447

ABSTRACT:
A world watch has an hour hand and a minute hand for usual time indication, a plurality of symbols disposed on a dial to represent areas having respective time differences, an area including hand for specifying one of the areas by indicating one of the symbols, a local time indicating hand for indicating the local time of the specified area at least in hours, and a date indicating hand for indicating a date of the specified area. The world watch comprises counters for counting the numbers of driving signals used for driving the area indicating hand and local time indicating hand, respectively; and a drive controlling circuit for generating, when the count of at least one of the counters reaches a predetermined value, a driving signal for driving the date indicating hand in a normal or reverse turning direction based on a judgment whether the predetermined value has been described by an increase in the count or by a decrease in the count. With this arrangement, the standard time and date of an optical area are correctly and easily displayed.

REFERENCES:
patent: 3633354 (1972-01-01), Stemmler
patent: 3653204 (1972-04-01), Miwa
patent: 3940920 (1976-03-01), Nakamura et al.
patent: 4133170 (1979-01-01), Kashio
patent: 4180969 (1980-01-01), Naito
patent: 4620797 (1986-11-01), Besson et al.
patent: 4847819 (1989-07-01), Hong
patent: 5054008 (1991-10-01), Darling
WO89/09950 Oct. 19, 1989 Published PCT Application Translation.

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