Construct · 1 fields · 2 citations

verge: a standalone construct

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

● anchor · a standalone construct Nearest construct by meaning·not indexed
verge1 CONSTRUCTVerge escapementHEADRICK · CROWN WHEEL

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

Horology

The earliest escapement, a staff braking a crown wheel

In horology the verge is the vertical staff of the oldest mechanical escapement, carrying two small flags (pallets) set roughly a right angle apart that alternately catch the teeth of a crown-shaped escape wheel. As the wheel pushes one flag the staff turns, swings its oscillator the other way, and the second flag then intercepts the next tooth, so the verge both releases the train tooth by tooth and feeds energy to a foliot or balance. De Carle's Practical clock repairing and Headrick's history of the escapement describe its action and its heavy, amplitude-dependent errors. The referent is the original escapement mechanism, sharing only its spelling with a roadside strip.[1][2]

Unit
The tooth-by-tooth release and impulse the staff gives per swing
Recovery means
Not applicable
Measured by
Characterised by pallet-flag angle, crown-wheel count, and the large amplitude dependence of its rate

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Nearby constructs

escapement2 fields · 2 citationsjingle · one word, two constructsdeadbeat2 fields · 2 citationsjingle · one word, two constructs

References

  1. De Carle, D. (1987). Practical clock repairing (3rd ed.). N.A.G. Press. ISBN 9780719800009
  2. Headrick, M. V. (2002). Origin and evolution of the anchor clock escapement. IEEE Control Systems Magazine, 22(2), 41–52. https://doi.org/10.1109/37.993314

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