Description4 valves.
Technical description: Brass. The bore through valves 2, 1, 3 and 4 expands gently between each valve and the next, giving an approximation to a conical bore. Valve type: 4 Samson finger-slide valves.
Overall size: 570; bell 251.
Sounding length: minimum 2643.
Bore: mouthpipe at c 45mm from mouthpiece receiver (minimum bore) 11.7; centre of 2nd valve at c 290mm from mouthpiece receiver, v.t.s. bore (2) 13.7 - 13.9; centre of 1st valve at c 450mm from mouthpiece receiver, v.t.s. bore (1) 14.3; centre of 3rd valve at c 660mm from mouthpiece receiver, v.t.s. bore (3) 15.2; m.t.s. at c 777mm from mouthpiece receiver, tuning slide bores 15.5 - 17.1; centre of 4th valve at c 1133mm from mouthpiece receiver, v.t.s. bore (4) 19.0; 1322mm from bell end, c 24.05; c 1016mm from bell end, 34.0. B = 0.45.
Dia of mouthpiece receiver: m.r.t. 12.7 - 11.9.
Inscribed on bell with Rudall, Rose and Carte monogram / "Prize Medal / 1862 / Patent / RUDALL, ROSE, CARTE & CO / 20 / CHARING CROSS / LONDON / No 1253"; on side of mouthpiece receiver ferrule "Bb".
General literature references: SAMSON, G.R., 1862. Improvements in Valves or Cylinders for Wind Instruments. G.B. Patent No 1245, 29th April 1862.
Usable pitch: Slight leakage, but appears to play at A4 = c 440 Hz.
Specific literature references: G.S. (1986) No 146.
Illustration references: G.S. (1986) No 146. |