Knowledge (XXG)

Shock-resistant watch

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3 kg hammer with an impact velocity of 4.43 m/s (This will deliver approximately 3.7 Joules of energy to the watch). The peak acceleration delivered to the watch head is 3100g +/- 15%, in sinusoidal form, over 350 microseconds. After the first shock the displacement of the hands (started from 'noon' must be < 5mins). After the second shock, the watch must keep its accuracy to +/- 60 seconds/day after these two shocks as compared to before the test. A third shock is then applied onto the crown side. Nothing should be bent or broken. There is also a 'free-fall' test for the complete watch. First it is dropped crown up clasp open. Second, it is dropped on it case back. In the case of deployant clasps, they are opened but continuous under the watch. In both cases a trap door is used to drop the watch onto a surface calibrated to deliver the same shock profile as in the impact tests above. No components should be broken or lost in the free-fall tests.
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specifies the minimum requirements and describes the corresponding method of test. It is intended to allow homologation tests rather than the individual control of all watches of a production batch. It is based on the simulation of the shock received by a watch on falling accidentally from a height
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In practice shock resistance is generally tested by applying two shocks (one on the 9 o'clock side, and one to the crystal and perpendicular to the face). The shock is usually delivered by a hard plastic hammer mounted as a pendulum, so as to deliver a measured amount of energy, specifically, a
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system, invented in 1934. Before the widespread adoption of shock-resistant balance pivots in the 1950s, broken balance wheel staffs were a common cause of watch repairs.
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are mounted in a spring suspension system intended to protect them from damage if the watch is dropped. One of the earliest and most widely used was the
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Virtually all mechanical watches produced today are shock resistant. Even divers' watches (according to
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issued a standard for shock-resistant watches, which many countries have adopted.
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to indicate how well a watch copes with mechanical shocks. In a
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ISO 1413:1984 Horology – Shock-resistant watches
111:, it indicates that the delicate pivots that hold the 2456: 2182: 1334: 283: 131:) must correspond not only with such criteria as 57:but its sources remain unclear because it lacks 149:International Organization for Standardization 103:is a common mark stamped on the back of wrist 239: 8: 156:of 1 m on to a horizontal hardwood surface. 246: 232: 224: 153:ISO 1413 Horology—Shock-resistant watches 88:Learn how and when to remove this message 27:Watch that copes with mechanical shocks 7: 25: 143:ISO 1413 shock-resistant standard 2537: 2536: 190:Incabloc shock protection system 34: 219:What is a shock resistant watch 1: 2579: 2532: 265: 180:Magnetic-resistant watch 43:This article includes a 72:more precise citations. 185:Water-resistant watch 18:Shock resistant watch 259:by standard number 45:list of references 2550: 2549: 273:ISO romanizations 98: 97: 90: 16:(Redirected from 2570: 2540: 2539: 260: 248: 241: 234: 225: 133:water resistance 109:mechanical watch 93: 86: 82: 79: 73: 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Index

Shock resistant watch
list of references
related reading
external links
inline citations
improve
introducing
Learn how and when to remove this message
watches
mechanical watch
balance wheel
Incabloc
ISO 6425
water resistance
luminosity
International Organization for Standardization
Watch
Diving watch
Magnetic-resistant watch
Water-resistant watch
Incabloc shock protection system
G-Shock
ISO 1413:1984 Horology – Shock-resistant watches
What is a shock resistant watch
v
t
e
ISO
ISO standards
ISO romanizations

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