The saxhorn was created by Belgian innovator Adolphe Sax, best known for his development of the saxophone. These brass instruments have a characteristic tapered bore and a deep cup-shaped mouthpiece, blending elements of cornets, flugelhorns and tubas. Developed possibly in the mid- to late-1830s, they were patented in Paris in 1845.
By constantly experimenting, Sax changed the saxhorn's valve pattern during the mid-1850s, and eventually created a family of more than ten models of different sizes. Saxhorns were popularized by the distinguished Distin Quintet, who toured Europe during the mid-nineteenth century. This family of musicians, publishers and instrument manufacturers had a significant impact on the growth of the brass band movement in Great Britain during the mid-to late-1800s. A contemporary work featuring this instrument is Desire Dondeyne's "Tubissimo", for bass tuba or saxhorn and piano (1983).
Selected References:
More information on: Saxophone or Adophe Sax