Annual or perpetual calendar mechanism and timepiece comprising the same
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United States of America Patent
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Jul 11, 2017
Grant Date -
Jun 2, 2016
app pub date -
Nov 23, 2015
filing date -
Nov 27, 2014
priority date (Note) -
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Abstract
In an annual or perpetual calendar mechanism, a day-of-the-month wheel includes a notch. At each actuation of a lever, a first pawl finger effects an actuation of one step, on one of the teeth of the day-of-the-month wheel. Upon actuation of the lever at the end of a month of fewer than 31 days, a second pawl finger effects, in the notch, an actuation of the day-of-the-month wheel by a whole number of steps. The notch is positioned between two consecutive teeth among the teeth of the day-of-the-month wheel. The day-of-the-month wheel has a peripheral edge which forms the profiles of its teeth as well as the notch.
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