Watch

Details Watch Watch

1989-07-21

1990-07-31

Roskoski, Bernard

Horology: time measuring systems or devices

Plural time zones

368 27, 368185, G04B 1922, G04B 1712

Patent

active

049455214

ABSTRACT:
A watch has an hour wheel (17) which can be driven in rotation around an axis of rotation (10) by a drive, and has a rotatable universal-time hour wheel (13) arranged coaxially thereto. These two hour wheels are connected to each other by a spring-loaded detent connection. The universal-time hour wheel (13) is rotatably settable stepwise relative to the hour wheel (17) by a setting element. It overcomes the spring force of the detent connection, in which connection the setting element can be coupled to the universal-time hour wheel (13) for setting the latter and can be decoupled again after the setting. The hour wheel (17) is connected to an hour hand (2), and a universal-time hour hand (3) is connected to a universal-time hour wheel (13), by which means the times of two different time zones can be indicated on a stationary dial face. The setting element is a time-zone ring (8) which is arranged concentric to the axis of rotation (10), and can be rotatably set stepwise from detent position to detent position, and by which a transmission element for resetting the universal-time hour wheel (13) can be driven.

REFERENCES:
patent: 2305508 (1942-12-01), Woodruff
patent: 3785141 (1974-01-01), Ikegami
patent: 4634287 (1987-01-01), Vuilleumier et al.

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