Mechanism for securing a balance spring stud to a balance bridge and sprung balance regulating device including such a mechanism
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United States of America Patent
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Sep 1, 2015
Grant Date -
Jun 25, 2015
app pub date -
Nov 13, 2014
filing date -
Dec 20, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
The regulating device includes an inertial balance (7) including a balance staff arranged to be pivotally mounted in the timepiece, a balance bridge (9) and a bearing (11) carried by the balance bridge and arranged to hold one end of the balance staff, a balance spring (1) including an inner end integral with the balance and an outer end (1a) integral with a stud (3; 103), and a mechanism for securing the stud (3; 103) including a housing (17) for receiving the stud and which is formed in a stud holder (5) pivoted on the balance bridge (9), the securing mechanism further including an elastic arm (15; 115) arranged to pivot concentrically to the balance staff between a first position where the elastic arm immobilizes the stud (3; 103) and a second position where the elastic arm is disengaged from the stud to allow the stud to be inserted into or removed from the housing.
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