- Anne Beetem Acker
Short upright piano invented about 1825 and produced by Johann Joseph Promberger (b Kuffulk, Tyrol, Austria, 5 June 1779; d Vienna, Austria, 25 June 1834). In 1811 Promberger, formerly a cabinetmaker and apprentice of Mathias Müller, obtained citizenship of Vienna and married Anna Wissgill Schweighofer, the widow of the piano maker Michael Schweighofer. The Promberger couple continued the Schweighofer workshop as Schweighofer und Promberger. In 1824, Promberger invented a small keyed glockenspiel for military use and was also granted a privilege for a novel stringing method for pianos. Announced in 1825, the six-octave (F′–f ″″) Sirenion, about 125 cm tall, had a ‘moveable’ soundboard, that is, not glued to the frame, and three pedals operating the dampers, una corda, and moderator. In a contemporary issue of The Harmonicon it is described as being double-strung, like an example in the collection of the Filharmonia Pomorska in Bydgoszcz, but a later example (...