Watch movement having date and phases of the moon indicators
AssigneeETA SA Fabriques d'Ebauches
InventorAbraham Zaslawsky
Life of this patent
Estimating the term…
Abstract
A watch movement has indicators for the date and the phases of the moon, these two indicators being automatically driven by the same intermediate revolving wheel member effecting one revolution every 24 hours, the one indicator by one tooth longer than the others and the other indicator by a pin which acts on a wheel having fifty-nine teeth integral with the indicator of the phases of the moon. A satisfactory engagement of the driving members in the corresponding teeth is ensured by a transverse displacement of the revolving wheel member resulting from the fact that a resilient arm of this revolving wheel member holds the edges thereof resting permanently against a fixed cylindrical stud having a flat surface.
Claims7
A watch movement having indicators for the date and the phases of the moon, the date indicator having thirty-one teeth and that of the phases of the moon being integral with a wheel having fifty-nine teeth, an intermediate revolving wheel member driven in rotation by the watch movement at the rate of one revolution every twenty-four hours causing these indicators to advance by one step for each revolution, whereby at a predetermined angle of rotation of said intermediate revolving wheel member said wheel member is displaced in the direction of the teeth of the date indicator and whereby, at another predetermined angle of rotation of said intermediate revolving wheel member said wheel member is displaced in the direction of the wheel having fifty-nine teeth.
A watch movement having
- a date indicator mounted on a toothed wheel having thirty-one teeth,
- an indicator for the phases of the moon mounted on a toothed wheel having fifty-nine teeth,
- an intermediate revolving wheel member,
- said intermediate revolving wheel member being driven by a watch movement so as to rotate once every twenty-four hours,
- drive means which at a predetermined angle during rotation connect said intermediate revolving wheel member to said toothed wheels having thirty-one and fifty-nine teeth respectively,
- whereby for each single revolution of said intermediate wheel member said drive means cause said toothed wheels having thirty-one and fifty-nine teeth respectively each to advance in rotation by the space of one tooth and
- first displacing means to move said intermediate wheel member towards said wheel having thirty-one teeth at a first predetermined angle of rotation and
- second displacing means to move said intermediate wheel member towards said wheel having thirty-one teeth at a second predetermined angle of rotation.
Dependencies are inferred from the claim text.