Timepiece staff
AssigneeRolex SA
InventorsDaniel Moille, Blaise Fracheboud
Life of this patent
Estimating the term…
Abstract
The timepiece shaft (1), in particular a shaft for a balance (2) or a shaft for an escapement wheel or a pallet shaft, includes at least one pivot (12). The timepiece shaft (1) has a surface of revolution about a first rotation axis (A1) the generatrix (G) of which in a plane (P) passing through the first rotation axis (A1) is curved, this surface of revolution extending at least at the level of the pivot, the pivot being defined as the zone of the timepiece shaft (1) intended to come into contact with a pivot bearing (50), in particular with a pivot jewel (50).
Claims21
An assembly for an assembled balance, the assembly comprising:
- a timepiece shaft, and
- an element driven onto the timepiece shaft,
- the timepiece shaft having a first driving portion and a first abutment portion arranged to halt the element during its driving onto the timepiece shaft,
- the element having a second driving portion on the timepiece shaft and a second abutment portion arranged to halt the element during driving of the element onto the timepiece shaft, wherein
- the first driving portion and the first abutment portion are separated by a separation portion having a diameter less than a diameter of the first driving portion, and/or
- the element comprises a recess between the second driving portion and the second abutment portion.
A timepiece shaft comprising a first driving portion for driving an element along a driving axis,
- the timepiece shaft having a geometry comprising a frustoconical first abutment portion arranged to halt an element during driving of the element onto the timepiece shaft,
- the first abutment portion having a half-angle at the apex in a range of from 30° to 60°,
- so that a distance measured along the driving axis and separating the first driving portion from the first abutment portion is at least 0.05 mm.
19-43. (canceled)
Dependencies are inferred from the claim text.