A Dictionary of Music and Musicians/Hopper

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A Dictionary of Music and Musicians
edited by George Grove

Hopper

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From volume 1 of the work.

1504835A Dictionary of Music and Musicians — Hopper

HOPPER. A name applied to the jack or escapement lever in the action of a pianoforte, or to the escapement lever with its backpiece, regulating screw, etc. complete. [See Grasshopper.] So named because this lever hops out of the notch against which its thrust has been directed; allowing the hammer to rebound, and leaving the string free to vibrate.

[ A.J.H. ]