Adjustable friction grand piano action

Details Adjustable friction grand piano action Adjustable friction grand piano action

1991-01-11

1992-06-30

Hix, L. T.

Music

Instruments

Stringed

G10C 318

Patent

active

051253097

ABSTRACT:
An adjustable friction grand piano hammer shank having bifurcated ends disposed on either side of a flange with a slot defined in each bifurcated end, a pivot pin receipt hole defined in each bifurcated end aligned with the slots, a strap having one end affixed to the bottom of one of the bifurcated portions extending therearound to form a loop around an adjustment screw with the strap's other end extending around the other bifurcated end to be affixed to the bottom of the other bifurcated end such that tightening the screw pulls on the strap and tightens together the portions of the bifurcated hammer shank ends above and below the slots to increase friction against the pivot pin and conversely, loosening the adjustment screw releases tension on the strap allowing the ends above and below the slot to be under less tension and reducing friction on the pivot pin.

REFERENCES:
patent: 48565 (1865-07-01), Koth
patent: 872551 (1907-12-01), Anderson

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