Timepiece
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United States of America Patent
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-
Aug 19, 2014
Grant Date -
Feb 14, 2013
app pub date -
Apr 26, 2011
filing date -
Apr 26, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A timepiece includes: —a barrel bridge (33), and—a barrel mounted on the barrel bridge, the barrel having: —a drum (20) which includes an end wall and side walls, —an arbor (14) which passes through the center of the drum, —a leaf spring housed in the drum and engaging at a first end with the arbor and at a second end with the drum, and—a cover (28) through which the arbor passes freely and which closes the drum, —a ratchet wheel (30) secured to the arbor to tension the leaf spring. The drum is pivoted by a first ball bearing including an intermediate ring (36), an inner ring (42) secured to the arbor and an outer ring (38), one of the intermediate ring and the outer ring being fixed to the barrel bridge and the other being secured to the end wall.
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Family
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Cited Art Landscape
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