HAND-SETTING MECHANISM FOR BACK WINDING WATCH

A hand-setting mechanism for a watch having a winding stem axially displaceable freely to a hand-setting position. The winding stem is used for winding the watch in its normal winding position and is displaceable axially by a crown thereon for coupling a transmission gear driven by the winding stem...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	IKEHATA, YUKIO
Format:	Patent
Sprache:	eng
Schlagworte:	HOROLOGY MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL MECHANICALLY-DRIVEN CLOCKS OR WATCHES PHYSICS TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
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Beschreibung
Zusammenfassung:	A hand-setting mechanism for a watch having a winding stem axially displaceable freely to a hand-setting position. The winding stem is used for winding the watch in its normal winding position and is displaceable axially by a crown thereon for coupling a transmission gear driven by the winding stem to a hand-setting gear of a hand-setting gear train for setting the hands of a watch. Semi-automatic means in the form of a spring biasing one of the two gears to be coupled by axial movement under control of the spring is enabled when the winding stem is displaced to its hand-setting position and disenabled when it is returned to its normal winding position.