Actuator for automatic performance piano

Details Actuator for automatic performance piano Actuator for automatic performance piano

1987-03-12

1988-05-03

Salce, Patrick R.

Music

Instruments

Automatic

G10C 320

Patent

active

047412372

ABSTRACT:
An actuator for an automatic performance piano, includes electromagnetic plunger units provided in correspondence to and adjacent to a plurality of keys of the piano, each of the electromagnetic plunger units having an excitation coil and a plunger, and a key drive portion, provided at the distal end of the plunger for driving the key. The electromagnetic plunger units are arranged along the key arrangement direction to be deviated from each other in the front-back direction of the key in a staggered manner. A motion stroke of the key drive portion of the electromagnetic plunger unit in one row is made smaller than a motion stroke of the key drive portion of the electromagnetic plunger unit in the other row.

REFERENCES:
patent: 784508 (1905-03-01), Weber
patent: 4031796 (1977-06-01), Wilkes et al.
patent: 4513652 (1985-04-01), Muramatsu et al.

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