Leap-year display mechanism for a horological movement with a perpetual calendar display
AssigneeMontres Breguet S.A.
InventorsChristophe Riedo, Jean-Philippe Rochat
Life of this patent
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Abstract
A leap-year display mechanism for a horological movement with a perpetual calendar display including a drive element connected to a month wheel set rotated by one step per month, a transmission star intended to be attached to a structure of the horological movement, arranged along the stroke of the drive element so as to be rotated thereby when the month wheel set completes one full revolution, a leap-year display connected to the transmission star via a reduction gear train so that with each revolution of the month wheel set, the leap-year display is rotated by one step.
Claims6
A leap-year display mechanism for a horological movement with a perpetual calendar display, wherein the display mechanism comprises:
- a drive element connected to a month wheel set rotated by one step per month;
- a transmission star configured to be attached to a structure of the horological movement, arranged along the stroke of the drive element so as to be rotated thereby when the month wheel set completes one full revolution;
- a leap-year display connected to the transmission star via a reduction gear train so that with each revolution of the month wheel set, the leap-year display is rotated by one step,
- wherein the leap-year display includes a roller comprising a display wall on which indications representative of the current type of year are shown, including a leap year and normal years,
- wherein the drive element comprises a finger attached eccentrically to the month wheel set by a mechanical connection, and
- wherein the drive element projects from a side face of the month wheel set in a direction along a longitudinal axis of the month wheel set and in a direction of the leap-year display.
Dependencies are inferred from the claim text.