Paul A Keogler

US Patent:

49952900, Feb 26, 1991

Filed:

Jun 7, 1989

Appl. No.:

7/362615

Inventors:

Norman Heischober - Massapequa NY
Paul Keogler - Valley Stream NY

Assignee:

H. & K. Automated Musical Creations Co. - Massapequa Park NY

International Classification:

G10F 504

US Classification:

84160

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.