Automatic tracking apparatus

Details Automatic tracking apparatus Automatic tracking apparatus

1978-11-22

1980-03-04

Hix, L. T.

Music

Instruments

Automatic

84138, 84140, 84 60, G10F 506

Patent

active

041910842

ABSTRACT:
An automatic tracking apparatus is provided for maintaining alignment of music rolls in player organs and player pianos using an improved, air pressure controlled, sensing and control device. More particularly this system incorporates an air pressure sensing device utilizing a piston/cam controlled pendulum to operate a pneumatic alignment device.

REFERENCES:
patent: 868386 (1907-10-01), Ackerman et al.
patent: 872315 (1907-11-01), Wood
patent: 1098890 (1914-06-01), Dickinson
patent: 1197596 (1916-09-01), Betz
patent: 1207965 (1916-12-01), Maier
patent: 1509765 (1924-09-01), Nicholson
patent: 3585895 (1977-06-01), Cannon

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