Books › A descriptive catalogue of the musical instruments recently exhibited at the Royal Military Exhibition, London, 1890 …, 1891 › scan 211
Scan 211
A descriptive catalogue of the musical instruments recently exhibited at the Royal Military Exhibition, London, 1890 …, 1891
4 lines. Read by computer on 1 October 2026. Printed page 191. See the scan on archive.org.
1valves in such a way that, when the third valve is pressed down, the vibrating column of air passes through passages in the first and second valves in addition to the two passages in the third valve, as used in the common arrangement; and for the purpose of bringing additional tubing into action in connection with the first and second valves, as required for correct intonation, when they are either or both used in combination with the third, Mr. Blaikley adds two air passages to each of these valves, and in connection with each pair of passages a loop, or circuit of tube, of the required length, which is added to the effective length of the instrument only when the third valve is used in connection with the others. Such additional tubing compensates for the lowering of the pitch of the instrument due to the pressing down of the third valve.
3By help of the annexed Drawings, this will be more clearly understood. Figure 1 is a front elevation of the valves with the pistons up; and Figure 2 is a back elevation, showing all the pistons down. The same letters of reference indicate like parts in both Figures. The dotted line A, A, Figure 1, shows the air passage through the piston for "open" notes, that is to say, notes produced with the pistons up; the line B B in the same Figure indicates the air passage when the third piston only is pressed down. In Figure 2
The computer misreads some letters and numbers. Where a name matters to you, read the scan.