Piano escapement action

Details Piano escapement action Piano escapement action

1997-03-12

1999-06-08

Shoop, Jr., William M.

Music

Instruments

Stringed

84243, G10C 318

Patent

active

059111674

ABSTRACT:
A knuckle assembly for an escapement action of a piano includes a knuckle, a jack retainer, and an adjustment means acting between the retainer and the knuckle for positioning the retainer relative to the knuckle. The knuckle assembly is mountable between first and second ends of a hammershank. The knuckle defines a knuckle surface for engagement with a jack. The knuckle is arranged for escape of the jack from engagement with the knuckle surface during depression of a piano key. The retainer retains the jack in an "at rest" position with the jack in engagement with the knuckle surface in opposition to force of a spring urging the jack toward the "at rest" position. A piano escapement action assembly includes a hammershank, a knuckle assembly, a jack engaged with a knuckle surface in an "at rest", and a spring disposed to urge the jack toward the "at rest" position.

REFERENCES:
patent: 3169436 (1965-02-01), Smith
patent: 4854211 (1989-08-01), Tanaka et al.
patent: 5511454 (1996-04-01), Jones et al.

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