hairspring

American  

[hair-spring] / ˈhɛərˌsprɪŋ /

noun

Horology.

1. a fine, usually spiral, spring used for oscillating the balance of a timepiece.

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hairspring British  

/ ˈhɛəˌsprɪŋ /

noun

1. horology a very fine spiral spring in some timepieces, which, in combination with the balance wheel, controls the timekeeping

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Etymology

Origin of hairspring

First recorded in 1820–30; hair + spring

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Example Sentences

See Examples For:

hairspring

However, Shapiro said, the production version of Resurgence will include a hairspring and bearings made in America.

From Los Angeles Times ● May 22, 2023

Its hairspring, mainspring, ruby bearings and a few other parts were sourced from Switzerland.

From Los Angeles Times ● May 22, 2023

It is intended to be the first member of a family of movements incorporating both the DIAMonSIL escapement and an adjustable oscillator fitted with a silicium hairspring.

From New York Times ● Nov. 23, 2012

Since the 17th century they have depended on a delicate hairspring that keeps a balance wheel turning backward and forward at a regular rate.

From Time Magazine Archive

In this instance the hairspring developed to the left from the collet similar to the illustration shown in Fig.

From Rules and Practice for Adjusting Watches by Walter J. Kleinlein

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