Setting mechanism for an analog display watch
AssigneeETA SA Fabriques d'Ebauches
InventorsJean-Claude Schaffner, Jacques Muller
Life of this patent
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Abstract
The mechanism has a sliding and rotary stem 2 for controlling two functions of a digital display watch. The stem 2 carries a fixed pinion 4. An intermediate gear 6 is mounted rotatably at the end of a rocking lever 32. Pivotal movement of the lever 32 against the action of a spring 36 is produced by the stem 2. In a first position of the stem 2, the gear 6 is in mesh with a date setting wheel 8 but out of mesh with the pinion 4. In a second position, the gear 6 is engaged by the pinion 4 and remains in mesh with the wheel 8. In a third, fully pulled out position, the gear 6 remains engaged by the pinion 4 and is pulled out of mesh with the wheel 8 and into mesh with a time setting wheel 10.
Claims4
A setting mechanism for a watch comprising
- a support structure,
- first and second toothed wheels having axes of rotation which are parallel to each other;
- a stem which is movable axially in a direction perpendicular to the axes of said wheels, and rotatable about said direction;
- a pinion which is fixed with respect to said stem, said pinion being coaxial with said stem,
- means for holding said stem in any one of three axial positions,
- an intermediate gear which is mounted about a displaceable axis;
- and
- means for displacing said axis in response to the movement of said stem and maintaining said axis parallel to the axes of said wheels, said intermediate gear being engaged with said first wheel and free with respect to said pinion when said stem is in the first position, said intermediate gear being engaged with said pinion and remaining engaged with said first wheel when said stem is in the second position, and said intermediate gear remaining engaged with said pinion and engaging with said second wheel when said stem is in the third position.
Dependencies are inferred from the claim text.