G - Physics – 04 – C
Patent
G - Physics
04
C
58/11
G04C 5/00 (2006.01) G04B 13/00 (2006.01) G04B 19/02 (2006.01) G04B 29/00 (2006.01) G04B 31/00 (2006.01) G04C 3/00 (2006.01)
Patent
CA 1134624
Abstract of the Disclosure The reductions gear of an electronic wristwatch having a stopping motor and a sweep second, comprises three concentric output shafts adapted to be rotated at different speeds and oporatively connected with each other and with the shaft of a stopping motor through gear wheels. The shaft making one revolution per hour has mounted thereon a friction wheel and a bearing means including a bush press fitted in a bore of a plate of the wristwatch. The bush is mounted so that a portion thereof projects from the plate toward a bridge of the wrist- watch, coordinated with respect to the plate and attached thereto by threaded means. The shaft making one revolution per hour passes freely through a bore in the bearing bush and is restricted from an unlimited axial displacement in one direction by an end face of the bearing bush, and in the other direction by an end face of that pinion which is mounted on this shaft with interference fit. This enables to arrange the entire toothed gearing between the shaft making one revolution per hour and the shaft making one revolution per minute to one side of the plate, facing the bridge, and to do without several complicated counterbores and milled areas in the plate, i.e. to simplify the manufacture of the plate and its structure. The structure of the output shaft assembly enables to signifi- cantly reduce the overall height of the reduction gear.
332600
Kruglov Gennady A.
Malkin Daniel D.
Peredkov Boris A.
Simbirtsev Alexei V.
Marks & Clerk
Nauchno-Issledovatelsky Institut Chasovoi Promyshlennosti
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