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Several of
the panels around the base of the organ open to allow access to the
equipment under the pipes. The door to the organ has been opened for
our inspection.
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A view inside reveals ductwork
leading from the reservoirs to the different parts of the organ.
Additional reservoirs are just out of view on the left. On the right
are the wind chests for the big Pedal Division pipes across the back
wall.
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a closer view of the reservoirs in the center of the organ. The springs
help maintain pressure in the organ. The springs are extended
indicating that the organ blower is on and air is flowing through the
system. The top part of the reservoir will contract and expand
depending on the pipe resources being used by the organist. |
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This funny looking contraption
operates the swell shutters. Depressing the swell pedal on the console
operates this pneumatic lever. The lever moves which pulls the cable
which is in turn attached to the Swell shutters.
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Behind the back wall of the organ
is the organ blower (larger brown box). This generates all of the wind
for the organ. The smaller box is a regulator which adds another layer
of air regulation and helps ensure a constant amount of air is being
supplied.
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builder's plate for the blower reveals that it is a 2 HP blower
delivering 9" of air static pressure. Note that this is substantially
lower than the 4" of wind being supplied to the pipes thus showing that
there is reserve capacity to help support the pipes even when the
organ's full resources are drawn. |
