Wurlitzer Style 33-A PianOrchestra
Philipps Pianella Model 33
(Hanulec/Kehoe collection, circa 1998)

Frontal view showing a portion of the feeder pumps and crank drive mechanism.
(Photograph courtesy of Joe Hanulec/Walter Kehoe)

The large cast-iron, round-leather belted pulley is connected to the motor. This, pulley in turn drives the pump crankshaft via roller chain reduction gears, providing a powerful, slow, and steady speed for the bellows type feeder pump.

The feeder pump, fastened to the floor of the PianOrchestra, serves a dual purpose, and provides both vacuum (front set of bellows) and wind-pressure (rear set of bellows, which are not visible).

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