Belt and Pulley Speed Reduction System in the
Wurlitzer Style 33 Mandolin PianOrchestra
Philipps Pianella Model Silvana-Xylophon
(Krughoff collection; Tim Westman restoration)

Belt/pulley reduction drive for feeder pumps in the Wurlitzer style 33 Mandolin PianOrchestra.

View of the early style belt driven crankshaft operated feeder bellows (or pump) using an intermediate speed reducing pulley. in feeder bellows produce both wind-pressure (to blow the pipework) and a vacuum (to operate the valve chests and other pneumatically motivated mechanical devices).

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