Watch whose movement includes a constant force device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 6, 2009
Grant Date -
Jun 7, 2007
app pub date -
Oct 10, 2006
filing date -
Oct 10, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The movement (1) of the watch includes a constant force device (14) inserted in a going rain connecting a spring barrel (2) to an escapement having an escapement wheel and including a third wheel which completes one revolution in several minutes. The input element of the constant force device (14) is the third wheel (12), the output element of said device (14) being a second third wheel (20) connected via gearing to the seconds pinion (38). The second third wheel is secured to a star wheel (26) that only releases the train upstream of the constant force device once per minute, thus forming an independent minutes display because the minute hand (7) jumps forward at each minute. This arrangement minimizes the transmission of shocks between the constant force device and the escapement and can advantageously be combined with a tourbillon (40).
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully