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balance spring

   Also found in: Wikipedia 0.01 sec.
balance spring [′balĀ·əns ‚spriŋ]
(horology)
An oscillating spring of spiral or (in a chronometer) cylindrical shape which governs the movement of a balance wheel in a timepiece. Also known as hairspring.


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It is a movement with real staying power, which has retained its virtues, but has also been enhanced with a few of the stylistic elements of the early Jones calibres: balance with high precision adjustment cams on the balance bars, Breguet balance spring, three-quarter wheel train bridge, plate and bridge made of nickel silver, long precision adjustment index and special decoration with gilt engraving.
5 Hz, large screw balance and Breguet balance spring.
The spiral balance spring was finally implemented into the world of making timepieces in 1675 CD.
 
 
 
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