Barrel shaft for a clock movement, barrel spring and barrel including such a spring and/or such a shaft
AssigneeRolex SA
InventorsJean-Louis Bertrand, Albert Bortoli, Thomas Gyger, Vincent Von Niederhäusern
Life of this patent
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Abstract
The invention relates to a barrel spring (2) including: an inner end (5) and an outer end; a first portion (50) having a first height (H); a second portion (52) having a second height (h) that is smaller than the first height (H) and being located near the inner end (5); and, at the second portion, e.g. at the inner end, a first attachment element (51) suitable for being attached to the barrel shaft, wherein the second portion is to be inserted into a circumferentially extending groove provided on the barrel shaft.
Claims20
A barrel spring including:
- an interior end and an exterior end,
- a first portion having a first height (H),
- a second portion having a second height (h) less than the first height (H) and situated near the interior end, and
- in the second portion, a first attachment element adapted to be fixed to a barrel shaft, the second portion being intended to be inserted in a groove extending circumferentially on the barrel shaft.
A shaft for a clock movement barrel, which includes a groove extending round a circumference of the shaft and intended to receive a barrel spring.
Dependencies are inferred from the claim text.