Device for rotationally driving a member intermittently

Details Device for rotationally driving a member intermittently Device for rotationally driving a member intermittently

1982-09-22

1984-10-23

Roskoski, Bernard

Horology: time measuring systems or devices

With calendar indicator

Movable ring or disk

368 35, G04B 1920

Patent

active

044785224

ABSTRACT:
The driving mechanism of the day of the month disk (18) comprises a driving wheel (14) and a transmission wheel (16) The driving wheel (14) comprises a toothed sector (26'a, 26'a) which can mesh with the pinion (44) of the transmission wheel (16) and peripheral wall surface (26'a) into which open the two ends (30' and 30") of an arcuate groove (30). The transmission wheel (16) also comprises a member constituted by four arms (48a to 48d) carrying four studs (50a and 50d) which can enter the groove (30) and a pinion (52) which meshes with the disk (18). Outside the driving phases, two of the studs abut against the peripheral wall surface (26'b) in order to lock the disk (18). This mechanism provides for a low torque which enables the energy to be applied to the motor of the watch to be reduced.

REFERENCES:
patent: 3738097 (1973-06-01), Vuilleumier
patent: 3841084 (1974-10-01), Eumier
patent: 4060977 (1977-12-01), Rochat
patent: 4081950 (1978-04-01), Chappatte
patent: 4240249 (1980-12-01), Malkin et al.
patent: 4261047 (1981-04-01), Nakao

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