Universal running equation of time mechanism and method of setting the same
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United States of America Patent
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Feb 16, 2016
Grant Date -
Apr 16, 2015
app pub date -
Feb 21, 2013
filing date -
Feb 27, 2012
priority date (Note) -
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Abstract
Universal running equation of time mechanism including a differential device outputting a running equation minute, the running equation minute driving a true minute which, via a true equation motion work drives a true hour, the civil time minute cannon-pinion driving, via a motion work wheel set, a civil hour wheel, a jumper spring, integral with the civil hour wheel, cooperating with a star having twelve teeth connected to an arbor carrying a civil hour hand, a time zone wheel also being integral with the arbor, a time difference and display train applying the time difference linked to the longitude position of the user relative to the center of the time zone to the true running equation hour, the time zone wheel applying to the civil hour wheel, in forward or backward one-hour steps, the time difference between the civil time at the place where the user is situated and the time at the center of the time zone.
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