Horology: time measuring systems or devices – Plural time zones – With movable disk display
Patent
1990-05-31
1991-03-05
Miska, Vit W.
Horology: time measuring systems or devices
Plural time zones
With movable disk display
G04B 1922
Patent
active
049982303
ABSTRACT:
A timepiece having a pivot supporting an hour hand, a coaxial shaft supporting a minute hand and a dial, having hour and minute indicia and openings corresponding to time zones. A gearwheel having a number of teeth corresponding to the number of time zones, is supported on the pivot and bears a disk having time-zone indicia. A first elastic element biases a radially movable body towards the gearwheel. A cam acts on the body every hour to move it against the biasing action of the first elastic element to a disengagement position, whereat the first elastic element causes a snap-action movement of the body towards the gearwheel. A pawl pivoted to the body is radially aligned with a tooth space of the gearwheel by a second elastic element. The resultant rotational traction of the gearwheel corresponds to a one-hour movement of the disk and the time zone indicia.
REFERENCES:
patent: 3075411 (1972-07-01), Sakuma
patent: 3703805 (1972-11-01), Ganter et al.
patent: 3871169 (1975-03-01), Schwaar et al.
patent: 4634287 (1987-01-01), Vuilleumier et al.
patent: 4945521 (1990-07-01), Klaus
Josif Albert
Miska Vit W.
Modiano Guido
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