REDUCTOR FOR ELECTROMECHANICAL WRIST WATCHES WITH STEPPING MOTOR AND CENTRAL SECONDS HAND

WIPO Patent Application WO/1980/000380

A1

A reductor for electromechanical wrist watches comprises three coaxial driving shafts having different speeds of rotation and interconnected with each other as well as with the shaft (2) of the stepping motor (3) through pinion-gear tooth pairs. The shaft (12) making one revolution per hour with a clutch wheel (10) fixed thereon is provided with a bearing shaped as a supporting bush (28) compressed in the opening of the plate (26) of the watch. The bush (28) is compressed so that a part (28a) extends beyond the plate (26) in the direction of a bridge (23) adjusted in relation to the plate (26) and fixed to it with screw joints. The shaft (12) goes loosely through the opening of the supporting bush (28) and is prevented from unlimited axial movement in one direction by the butt end (28d) of the supporting bush (28) and in the other direction by the butt end of that pinion (13) which is compressed on the shaft (12). The reductor may be used in the watch industry, in the production of quartz wrist watches with stepping motor and similar time measuring devices.

JPS51136455

AXIS INSTALLATION MECHANISM FOR CLOCK, ETC.

SIMBIRTSEV A (SU)
MALKIN D (SU)
PEREDKOV B (SU)
KRUGLOV G (SU)

PCT/SU1979/000028

March 06, 1980

April 27, 1979

Click for automatic bibliography generation  

NII CHASOVOJ PROMY (SU)
SIMBIRTSEV A (SU)
MALKIN D (SU)
PEREDKOV B (SU)
KRUGLOV G (SU)

G04B13/00; G04B19/02; G04C3/14; G04B29/00; G04B31/00; G04B33/10; G04C3/00; (IPC1-7): G04C3/00; G04B13/00

US3888073A	1975-06-10
FR2237235A1	1975-02-07
FR2360924A1	1978-03-03
FR2049124A1	1971-03-26
FR2099668A1	1972-03-17
US3916614A	1975-11-04

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