Relay valve assembly for player pianos

Details Relay valve assembly for player pianos Relay valve assembly for player pianos

1980-04-21

1982-06-29

Franklin, Lawrence R.

Music

Instruments

Automatic

84115, G10F 504

Patent

active

043367372

ABSTRACT:
This apparatus pertains to mechanical and electromagnetic apparatus for controlling player piano operation. The conventional player piano paper tape which opens and closes pneumatic holes in a tracker bar is replaced by a valve board and a plurality of electromagnetic valves. Each electromagnetic valve operates to control air passage through one of the holes in the tracker bar.

REFERENCES:
patent: 370466 (1887-09-01), Gally
patent: 780862 (1905-01-01), Cameron
patent: 1224783 (1917-05-01), Pilcher
patent: 2801563 (1957-08-01), Koehl

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