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English: 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. Simplified illustration based on patent diagrams.
Thayer axial flow valve on a tenor trombone. The axial flow valve, or Thayer valve, is a brass instrument valve design patented in 1978 by Orla Ed Thayer. [1] Designed with assistance from Zigmant Kanstul, it was originally intended to replace the traditional rotary valve on the French horn, but instead revolutionized the design of trombone valve attachments. [2]
The first of these types was the Stölzel valve, bearing the name of its inventor Heinrich Stölzel, who first applied these valves to the French horn in 1814. Until that point, there had been no successful valve design, and horn players had to stop off the bell of the instrument, greatly compromising tone quality to achieve a partial chromatic scale.
A major grower said this week it was abandoning its citrus growing operations, reflecting the headwinds Florida's signature crops are facing following a series of hurricanes and tree diseases.
Donald Trump blamed Gavin Newsom for “apocalyptic” wildfires raging in southern California on Wednesday, but the governor's office hit back at the president-elect and accused him of "playing ...
Caffeine: 0-32 mg. Calories: 25 per can. Sugar: 3-5 grams. Fiber: 2 grams. Sodium: 0-35 mg. Poppi features flavors like Raspberry Rose, Strawberry Lemon and Classic Cola and comes in brightly ...