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Kimball Theatre Organ Regulator
The regulator shown above is the type built by Kimball. It closely resembles regulators built by the major theatre organ
builders. Air enters the regulator from the bottom and under control of the three pallets at A, B & C and the weighted top,
controls the pressure of the air sent to the chests. Pressure of the static air from the blower pushes the head (top) of the
regulator up until the pallets are closed. Weight is provided at the top from springs attached at the four corners of the
regulator. Sometimes weights are place on the top of the regulator in addition to the springs to make up the total weight required to provide the correct pressure.
Valve A is a cone valve and is quite small. It controls the pressure when there is little demand for air. As the demand
increases, pallet B opens and then pallet C. The dowels for each of the pallets are of a different length. As the head of
the regulator drops, the pallet with the longest dowel opens. As the head drops further, the pallet with the next longest dowel opens and so forth.
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