Automatic player piano having frame structure self-aligned with

Music – Instruments – Automatic

Patent

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G10F 102

Patent

active

058615660

ABSTRACT:
An automatic player piano has solenoid-operated key actuator units under a keyboard mounted on a wooden key bed, and the solenoid-operated key actuator units are supported by a frame structure inserted into a slot formed in the wooden key bed and bolted to metallic bracket members screwed to the wooden key bed; when the frame structure is taken out for a repairing work, the bracket members are never removed from the wooden key bed, and the bolt holes of the wooden key bed are never undesirably enlarged.

REFERENCES:
patent: 4031796 (1977-06-01), Wilkes
patent: 4741237 (1988-05-01), Murakami et al.
patent: 4873905 (1989-10-01), Murakami et al.
patent: 5194685 (1993-03-01), Kawamura et al.
patent: 5527987 (1996-06-01), Yamamoto et al.

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