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The axial flow valve, or Thayer valve, is a brass instrument valve design patented in 1978 by American inventor Orla Ed Thayer. [1] Designed with assistance from instrument maker Zigmant Kanstul, it was originally intended to replace the traditional rotary valve on the French horn , but instead revolutionized the design of trombone valve ...
This reduces acoustic impedance effects, providing a more open "feel" for the player and a "crisper" tone more similar to a standard trombone. [4] While the Hagmann valve does not achieve the low 20–25° angle of deflection in axial flow valves, it is still about as free-blowing and, being otherwise substantially similar to a standard rotary ...
Axial flow valve in default (A) and engaged (B) positions. 1. airflow, from mouthpiece; 2. airflow, to bell; 3. valve tubing; 4. valve casing; 5. conical rotor; 6. input (a) and return (b) valve ports; 7. spindle axis of rotation. Axial flow valves are an alternative for the traditional rotary valve found on trombones with valve attachments.
Many of these new valve designs have been widely adopted by players, especially in symphony orchestras. The Thayer axial flow valve is offered on professional models from most trombone manufacturers, and the Hagmann valve particularly from European manufacturers. Some trombones have three piston or rotary valves instead of a slide; see valve ...
The valve trombone emerged concurrently with the invention of valves in the early 19th century. Most early instruments retained the shape and form of the slide trombone, employing three valves with the tubing arranged in place of the slide; others used the new valve mechanism as an opportunity to explore different configurations while retaining the overall cylindrical bore and bell profile.
The bell of an F. E. Olds trombone, c. 1927, with the trademark "Golden Bear" and date of the 1912 patent. F. E. Olds was a manufacturer of musical instruments founded by Frank Ellsworth (F. E.) Olds in Fullerton, California, in the early 1900s. The company made brass instruments, especially trombones, cornets, and trumpets.
The trombonium has the same timbre as a regular trombone except in a smaller, more compact form. [1] It was originally designed to be used as a marching trombone, and has valves rather than a slide thus superficially resembles a tenor horn or euphonium . [ 1 ]
The modern bass trombone is the same length as a tenor trombone, but typically has two valves, pitched in F and G♭. When combined, these valves put the instrument into D. The modern contrabass trombone is usually constructed in F and fitted with two valves in either D and B♭ combining to give A♭, or in C and D♭ combining to give A. The ...
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