Organ action

Organ action
Organ action: organ internal operation.
Pipe: cylinder equipped with a whistle or a reed.
Rack board: pierced board that maintains the pipes vertically.
Upper board: pierced wooden piece that receives the pipes base to prevent the air from escaping.
Slider: allows to choose the pipes row and the notes to be heard.
Valve spring: spring that allows to open or close a valve.
Wind trunk: pipes that brings the air towards the slider.
Stop rod: mechanism allowing to operate the slider.
Tracker: mobile rod linking the key to the valve.
Key: part of the keyboard that is pressed to produce a note.
Valve: trap that is operated to get a note. There is a valve for each note for each keyboard.
Bearer: guides between which the slider is slided.

Photo :

EN : Bells (ceramic)
FR : Cloche
ES : Campana


A bell is a simple sound-making device. The bell is a percussion instrument and an idiophone. Its form is usually an open-ended hollow drum which resonates upon being struck. The striking implement can be a tongue suspended within the bell, known as a clapper, a small, free sphere enclosed within the body of the bell, or a separate mallet. Bells are usually made of cast metal, but small bells can also be made from ceramic or glass. Bells can be of all sizes: from tiny dress accessories to church bells weighing many tons.