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Title:
ESCAPEMENT MECHANISM FOR CLOCK MOVEMENT
Document Type and Number:
Japanese Patent JP2015078980
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a wrist-watch escapement mechanism which remains accurate and reliable over a long period of use.SOLUTION: An escapement mechanism for a wrist-watch movement includes a pallet lever with a pallet fork 13, and a roller device with an impulse-pin coupled to a balance wheel, where the pallet fork 13 includes an entry horn 19 and an exit horn 21 and the impulse-pin includes a first cam portion configured to be engaged with the entry horn 19 and a second cam portion configured to be engaged with the exit horn 21. The first cam portion includes a first cam surface configured to be engaged with the entry horn 19 on first levels 10a, 13a, and the second cam portion includes a second cam surface configured to be engaged with the exit horn 21 on a second levels 10b, 13b, the first and second levels being staggered in a direction parallel to the axis of rotation of the roller device.

Inventors:
MARECHAL SYLVAIN
STEPHANE BEUGIN
KARAPATIS NAKIS
BENOIT JUNOD
Application Number:
JP2014204499A
Publication Date:
April 23, 2015
Filing Date:
October 03, 2014
Export Citation:
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Assignee:
MONTRES BREGUET SA
International Classes:
G04B15/14; G04B15/10
Domestic Patent References:
JP2013524201A2013-06-17
JP2009162755A2009-07-23
JP2013524201A2013-06-17
JP2009162755A2009-07-23
Foreign References:
US20120307601A12012-12-06
US20090168611A12009-07-02
US20120307601A12012-12-06
US20090168611A12009-07-02
Attorney, Agent or Firm:
山川 政樹
山川 茂樹