HOW ORGANS WORK

SCHEMATIC DRAWINGS OF MECHANICAL ACTION ORGANS

Direct Action

When the bellow is pulled up, wind enters the bellow via the feeder valve (2). The weight (14) then pushes the bellow down sending wind towards the pallet box (6) at the correct pressure. When depressed, every key (7) opens the corresponding pallet (5), letting wind run through the wind chest grooves to the pipes. All the pipes sing because of the combination of wind system, key action and stop action. Sliders (10) of pipe rows are controlled by stopknobs. Slider movements let the wind pass from the windchest to the pipes, or not. Note: (9), (10) and (11) together are called the wind chest.

Featured organs with direct action:

San Andrés Zautla
Sta. Ma. de la Natividad Tamazulapan
San Andrés Huayapam

Suspended Action

When the bellow is pulled up, wind enters the bellow via the feeder valve (2). The weight (14) then pushes the bellow down sending wind towards the pallet box (6) at the correct pressure. When depressed, every key (7) opens the corresponding pallet (5), letting wind run through the wind chest grooves to the pipes. All the pipes sing because of the combination of wind system, key action and stop action. Sliders (10) of pipe rows are controlled by stopknobs. Slider movements let the wind pass from the windchest to the pipes, or not. Note: (9), (10) and (11) together are called the wind chest.

Featured organs with suspended action:

San Jerónimo Tlacochahuaya
La Basílica de la Soledad
La Catedral de Oaxaca
San Matías Jalatlaco
Santo Domingo Yanhuitlán

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