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overbank

[oh-ver-bangk]
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verb (used without object) Horology.
  1. to have the balance staff oscillate so greatly that the fork of the lever fails to engage, rendering the escapement inoperative.
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Origin of overbank

First recorded in 1880–85; over- + bank1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for overbank

Historical Examples

  • In spite of this the model runs very actively and will overbank if wound up very far.

    The Auburndale Watch Company

    Edwin A. Battison