Electromagnetic devices for actuating piano keys

Details Electromagnetic devices for actuating piano keys Electromagnetic devices for actuating piano keys

1980-11-14

1982-07-13

Franklin, Lawrence R.

Music

Instruments

Automatic

84107, G10F 102

Patent

active

043388477

ABSTRACT:
Electromagnetic devices for actuating piano keys are responsive to music in an encoded format, for example as might be contained on a magnetic tape or phonograph record, to selectively actuate the keys with controlled forces and for selected durations. A separate device is provided for each key, and the devices are operable to authentically reproduce musical renditions. In one embodiment, a single electromagnet is associated with each key rearwardly of the piano headboard, and an energizing signal applied thereto is controlled to determine the intensity and duration of note played. In another embodiment, a plurality of electromagnets are associated with each key rearwardly of the headboard, and are selectively energized to determine the intensity and duration of note played. It is also contemplated to mount various arrangements of electromagnets within a housing, and to place the housing across the front of the keyboard to actuate the keys.

REFERENCES:
patent: 488482 (1892-12-01), Pain
patent: 784457 (1905-03-01), Weber
patent: 784508 (1905-03-01), Weber
patent: 1003201 (1911-09-01), Phillips

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