balance_spring
Differences
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— | balance_spring [03.07.2022 15:32] (current) – created - external edit 127.0.0.1 | ||
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+ | ====== Balance spring ====== | ||
+ | {{wst> | ||
+ | [[Spring]]s are used at several places in a watch [[movement]] | ||
+ | |||
+ | *for energy storage in the [[winding]] (as [[mainspring]], | ||
+ | *at the [[balance wheel]] (balance spring) as part of the [[oscillating system]] | ||
+ | *as [[shock protection]] | ||
+ | |||
+ | ==== Hairspring ==== | ||
+ | The spring of the [[balance]] is also called [[hairspring]] (flat spiral). It was invented in [[1675]] (according to another source in [[1665]]) by [[Huygens, Christiaan|Christiaan Huygens]]. Here the points of attachment of [[balance staff]] and [[balance cock]] (stud) lie on the same plane. | ||
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+ | Although flat spirals have worse results than [[Breguet hairspring]]s (see below), because they - unlike those - don't move exactly concentric during expansion and contraction, | ||
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+ | ==== Breguet spiral ==== | ||
+ | [[Abraham-Louis Breguet]] invented this type of balance spring (also called [[Breguet hairspring]]), | ||
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+ | ==== Auto-compensating spiral ==== | ||
+ | Balance springs made of spring steel have the disadvantage that they are changing their elasticity with temperature fluctuations. This also changes the speed of the clock. In the [[1930]] years, after intensive research, a new balance spring has been developed consisting of an alloy of different metals, which was able to compensate temperature changes. In [[1933]] these springs entered the watch market under the name " | ||
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+ | ==== Silicon hairspring ==== | ||
+ | In this newer development, | ||
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+ | * Improved isochronism (regularity of oscillation). | ||
+ | * [[Anti-magnetic]] | ||
+ | * Temperature compensation due to the material properties. | ||
+ | * No thermal or mechanical degradation at the attachment points, unlike conventional spirals | ||
+ | * Insensitivity to small impacts and thus reduced rate deviations | ||
+ | * Reduced sensitivity to centrifugal and gravitational forces, as three times lighter than conventional spirals | ||
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+ | ===== See also ===== | ||
+ | * [[Nivarox]] | ||
+ | * [[SPRON]] | ||
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+ | {{tag> | ||