Damper mechanism provided in a grand piano

Details Damper mechanism provided in a grand piano Damper mechanism provided in a grand piano

1995-02-17

1997-02-04

Spyrou, Cassandra C.

Music

Instruments

Stringed

84220, 84171, G10C 300

Patent

active

056000774

ABSTRACT:
In a grand piano having an electronic sound source performance mode, a damper unit for stopping the movement of the hammer shanks in response to depression of the keys is provided. The damper unit has a relatively wide stop rail for halting the motion of the hammer shanks. Both ends of a support plate connected to the stop rail are pivotally supported by a pair of support mechanisms for pivotal motion in the longitudinal direction of the stop rail. In one of the pair of support mechanisms, a coil spring for urging the stop rail toward the support mechanism is provided. The stop rail is pulled toward the other support mechanism by an externally operated wire. Without changing the direction of the contact face of the stop rail for abutting on the hammer shank, the stop rail can be moved vertically between a stop position and a retracted position. In grand pianos, which have only a limited amount of available space above the hammer shank, the stop rail can be broadened.

REFERENCES:
patent: 503880 (1893-08-01), Shearer
patent: 1540739 (1925-06-01), Jefferson et al.
patent: 4450747 (1984-05-01), Aoyama
patent: 5374775 (1994-12-01), Kawamura et al.

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