Apparatus and method for controlling a pneumatically powered mus

Details Apparatus and method for controlling a pneumatically powered mus Apparatus and method for controlling a pneumatically powered mus

1989-06-07

1991-02-26

Brown, Brian W.

Music

Instruments

Automatic

G10F 504

Patent

active

049952900

ABSTRACT:
An appartus for controlling a mechanical music-maker, such as a player-piano has a multiplicity of mechanical actuators and uses a vacuum as the motive force therefor. The mechanical actuators, which actuate corresponding musical keys, are each controlled by a valve which connects the vacuum to the mechanical actuator when opened. The valve is opened when the vacuum side thereof is vented to atomsphere by the first venting system. A second venting system is provided, which can be isolated from the first venting system. The second venting system utilizes electrically energizable solenoid valves to control the venting of the vacuum side of each valve when the first venting system is isolated therefrom.

REFERENCES:
patent: 1009268 (1911-11-01), Trist

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