Watch hand drive shaft structure

Details Watch hand drive shaft structure Watch hand drive shaft structure

1985-12-10

1986-12-02

Miska, Vit W.

Horology: time measuring systems or devices

Arbor and pinion details

G04B 2900

Patent

active

046261095

ABSTRACT:
In a drive shaft arrangement for a timepiece provided with a minute shaft for carrying a minute hand and an hour sleeve disposed on the minute shaft for carrying an hour hand, the minute shaft is provided with a collar and carries on one side of the collar a minute gear and a pinion gear for rotation with the minute shaft and on the other side the hour sleeve which is provided with an hour gear. The hour gear has a pan-shaped cavity formed in its face adjacent the collar and a Belleville spring is disposed in the pan-shaped cavity so as to abut with its outer circumference the cavity wall and with its radially inner end the collar.

REFERENCES:
patent: 4249251 (1981-02-01), Wuthrich

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