Piston valve (schematic view) in up position (left) and down position (right): a – outer casing, b – piston, c – guide, d – elbows serving as channels for the airstream, e – additional tubing, or valve slide, f – slide, g – spiral spring, h – finger button, i, j – cork buffer and cork (or felt) washer (both for noise prevention); arrows show direction of air from mouthpiece towards bell
Piston valve (schematic view) in up position (left) and down position (right): a – outer casing, b – piston, c – guide, d – elbows serving as channels for the airstream, e – additional tubing, or valve slide, f – slide, g – spiral spring, h – finger button, i, j – cork buffer and cork (or felt) washer (both for noise prevention); arrows show direction of air from mouthpiece towards bell
