HOW ORGANS WORK

Schematic drawings of mechanical action organs*: Direct Action and Suspended Action

DIRECT ACTION (ENLARGEMENT)

Drawing by José Luis Acevedo Guzmán
Copyright © IOHIO

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.

DIRECT ACTION (DETAIL)

Drawing by José Luis Acevedo Guzmán
Copyright © IOHIO

SUSPENDED ACTION

Drawing by José Luis Acevedo Guzmán
Copyright © IOHIO

SUSPENDED ACTION (ENLARGEMENT)

Drawing by José Luis Acevedo Guzmán
Copyright © IOHIO

SUSPENDED ACTION (DETAIL)

Drawing by José Luis Acevedo Guzmán
Copyright © IOHIO

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.