Tubular-pneumatic action

Tubular-pneumatic action (Ger.: Röhrenpneumatik; It.: sistema pneumatico tubolare), organ action invented in 1872 by Henry Willis after earlier experiments by other builders (see: pneumatic lever) to take the place of the long tracker action and the magnetoelectric action, and devised as a connection between an organ separated from its console. When a key is depressed, a small wind chest is opened; this conveys wind through a lead tube to a small bellows that opens the pallet. However, distance…