balance spring


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balance spring

[′bal·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.
References in periodicals archive ?
Like its predecessor, it features a black silicon balance spring which looks striking against the new black galvanic coated and engine-turned 18-carat gold dial.
In 1848 he devised an improved bi-metal compensating balance spring that resulted in a more accurate reading for the setting of longitude.
Where it is used in the vintage watches, based on the technical style of the first Jones calibres of 1868 it has the nickel-plated and decorative three quarter plate made from nickel silver and the elongated index for easier precision adjustment of the active length of the balance spring, which was characteristic of all Jones calibres.
An internal cage bearing the balance, balance spring and escapement completes one turn on its axis in 45 seconds.
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.
The invention of the balance spring in the 1670s was to transform the British watch making industry.
balance spring - whose frequency has been raised to 10 Hertz - ensure
In 1848, Hartnup devised an improved bi-metal compensating balance spring that resulted in a more accurate reading for the setting of longitude using chronometers.
Hartnup devised an "improved" bi-metal balance spring that resulted in a "more accurate reading" for setting longitude, an improvement that also brought praise from the Astronomer Royal, who sent an assistant to Liverpool to be taught under the personal supervision of Hartnup.
The tourbillon carriage has been crafted from titanium, and in the movement used, the calibre 581DR, the balance spring is made of silicon, unlike traditional ones in metal alloys.
Nestled within the hand-wound mechanical movement is a flying tourbillon that comprises a balance spring, anchor and escapement wheel made of silicon.
Powering this stylish timepiece is the hand-wound Omega master co-axial calibre 8511 - a unique movement which features a time zone function, Si14 silicon balance spring, a three-level co-axial escapement and Omega's exclusive anti-magnetic technology.