Construct · 1 fields · 1 citations

tourbillon: a standalone construct

One name. One construct. A landmark on the map.

● anchor · a standalone horology construct Nearest construct by meaning·not indexed
tourbillon1 CONSTRUCTTourbillonDANIELS · ROTATING CAGE

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Horology

A turning cage that averages out an escapement's position errors

A tourbillon mounts the whole escapement (balance, hairspring, lever and escape wheel) inside a cage that rotates slowly, usually once a minute, driven by the train. Because gravity pulls differently on a balance held in each vertical position, a fixed escapement gains in some positions and loses in others; continuously turning the cage makes the escapement pass through all those positions so the errors average out rather than accumulate. Daniels's Watchmaking describes the construction and the positional error it is meant to correct. The referent is a rotating-escapement device for averaging the gravity-dependent rate errors of a portable timekeeper.[1]

Unit
The averaging of vertical-position rate errors over each cage rotation
Recovery means
Not applicable
Measured by
Assessed by the spread of rate across vertical positions with and without the rotating cage

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Nearby constructs

escapement2 fields · 2 citationsjingle · one word, two constructsbalance4 fields · 5 citationsjingle · one word, four constructs

References

  1. Daniels, G. (2011). Watchmaking (Updated ed.). Philip Wilson Publishers. ISBN 9780856677045

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