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AssigneeYamaha Corporation
InventorShigeru Muramatsu
Estimating the term…
Upon request for retrofitting, workers bring a gadget and a marking tool and other tools to the user's home; the workers attach the marking tool to a keyboard, mark locators on a key bed by using the marking tool, form locating recesses therein, and bore reference seal holes by using a template, counter holes of which are aligned with the locating recesses; subsequently, the workers relate the gadget with the reference seal holes, bore through-holes in the key bed at target spots exactly below the black and white keys under the guide of the reference seal holes, and assemble a key drive unit with the key bed so that plungers pass through the through-holes; since the reference seal holes have been related with the keyboard, the gadget sequentially positions a drill at the target spots also related to the keyboard.
A method for retrofitting a keyboard musical instrument to an automatic player keyboard instrument, comprising the steps of:
A method for forming holes in a stationary board where a keyboard is to be mounted, comprising the steps of:
A gadget for forming holes at target positions in a stationary board of a keyboard musical instrument marked with at least one reference seal at a certain position determined on the basis of a keyboard incorporated in said keyboard musical instrument, comprising:
Dependencies are inferred from the claim text.