Actuator for automatic performance piano
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United States of America Patent
Stats
-
May 3, 1988
Grant Date -
N/A
app pub date -
Mar 12, 1987
filing date -
Mar 14, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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