Method of producing drive element for a timepiece barrel including a barrel arbor and mainspring
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United States of America Patent
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Apr 19, 2016
Grant Date -
Oct 31, 2013
app pub date -
Apr 24, 2013
filing date -
Apr 25, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A method for fabricating a barrel arbor for a timepiece includes wire drawing a bar to form a continuous profile, projecting or re-entrant relative to a support sector having a touching-up axis parallel to the bar axis, and whose section matches that of complementary hooking to be made on the arbor and, in a touching-up operation, machining the complete external contour of the arbor. A drive element includes a determined spiral-coiled mainspring including at an inner end hooking having a defined profile and an arbor produced by this method including the support sector for supporting the first coil, and a complementary hooking having a complementary profile to the profile for pivoting together with the mainspring.
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