Adolphe Sax was a 19th-century Belgian instrument designer, whose saxotromba and saxhorn never caught on, but the saxophone did.
From the independent.co.uk
Modern Piston valves were developed by Perinet for the saxhorn family of instruments promoted by Adolphe Sax around the same time.
From the en.wikipedia.org
Following the development of instruments such as the keyed trumpet or the saxhorn family of brass instruments, a second tradition of the brass and woodwind military band was formed.