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Mechanical principles of the accordion: air flow paths

The Melody: Button, Pallet.

As described previously, the reed rank is a kind of wood harmonica on which reed-fitted plates are laid.

When air flows through the rank in the right direction, the reed vibrates.

Each button on the accordion is connected to a mechanism which allows one or more pallets to be lifted.

Pressing a key on the fingerboard raises the pallet and allows air to flow across the reed.

Right hand of a study chromatic button accordion:

figure 1 - no sound produced

accordion air mechanism

figure 2 - air reaches the reeds

accordion working air mechanism

Example of a 2-voice, 80-bass accordion, as depicted above:

Pigini top prince II