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power reserve indicator

A technology of indicating mechanism and power reserve, which is applied in the field of watches and clocks, and can solve problems such as inapplicability

Active Publication Date: 2017-11-24
CHRONOMETRIE FERDINAND BERTHOUD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the power reserve mechanisms of the prior art are hardly suitable for being mounted in a watch frame in a so-called "volante" manner

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Figures 1 to 3 Shown is a power reserve indicating mechanism 1 according to the invention. This mechanism comprises a threaded shaft 2 intended to be coupled, for example by means of screws 8 , to elements of a frame (not shown) of a timepiece movement. The threaded shaft 2 is thus fixed and cannot be driven in rotation. For the sake of clarity, the thread of the threaded shaft 2 is not shown in the figures. If desired, the end of the threaded shaft 2 remote from the frame element can be supported by a bearing 9 in an additional bridge (not shown).

[0024] The cam 3 engages on the threaded shaft 2 and comprises a not shown tap which is arranged to cooperate with the threaded shaft 2 by screwing such that rotation of the cam 3 drives the movement of the cam along the threaded shaft. The cam 3 has an outer surface 7 inclined towards said thread axis. Although the shown cam 3 has the shape of a truncated cone, other shapes are equally possible, eg a shape with a conv...

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PUM

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Abstract

The invention relates to a power reserve indicator mechanism (1) for a timepiece, including: a threaded pin (2) intended for being mounted secured to a case element of said timepiece; a cam (3) having an outer surface (7) tilted relative to said pin (2), the cam (3) being arranged such as to engage by screwing with the threaded pin (2); a driving mobile (10) of said cam (3), said driving mobile (10) being intended for being rotated in both directions of rotation by a barrel of said timepiece, and including at least one means for rotating (4) said cam (3), secured to said driving mobile; a sensor (5) in contact with said outer surface (7) of said came (3) and kinematically linked with a power reserve indicator.

Description

technical field [0001] The invention relates to the field of watches and clocks. In particular, the invention relates to an indicating mechanism for a power reserve of a timepiece. Background technique [0002] Documents EP 1 333 341 , CH 95250 and CH 330 559 disclose power reserve indication mechanisms using cams screwed onto threaded shafts. The probe is in contact with the surface of the cam, and the probe is drivingly connected to the indicator of the power reserve. The traditional method is that the threaded shaft or cam is in drive connection with the main shaft of the barrel while the cam or threaded shaft is in drive connection with the drum of the barrel respectively. Thus, when the barrel is wound up, the cam moves in a first direction along the threaded axis by means of the interaction of the shaft and the respective thread of the cam. When the barrel is released, the cam moves along the threaded axis in a second direction opposite to the first direction. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04B9/00
CPCG04B9/005
Inventor 大卫·康多
Owner CHRONOMETRIE FERDINAND BERTHOUD