Timepiece movement with a second stop device

Details Timepiece movement with a second stop device Timepiece movement with a second stop device

1995-10-25

1997-04-15

Roskoski, Bernard

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

368157, 368160, 368 80, G04B 1100

Patent

active

056217048

ABSTRACT:
A timepiece movement comprises a rotor driven for intermittent rotation by a stepping motor, a speed-reducing wheel train and a second stop device. The speed-reducing wheel train has a movement conversion mechanism for transmitting intermittent rotary movement of the rotor to continuous rotary movement of a second hand wheel in a smooth manner. The second stop device is moveable between a first position, for immediately stopping the second hand wheel, and a second position, for immediately moving the second hand wheel at a predetermined speed.

REFERENCES:
patent: 4122663 (1978-10-01), Kock
patent: 4623361 (1986-11-01), Muto
patent: 4716783 (1988-01-01), Hayashi
patent: 4885730 (1989-12-01), Miyazawa
patent: 4932011 (1990-06-01), Schwartz
patent: 5197045 (1993-03-01), Miyazawa

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