- Margaret Cranmer
- and Kari Michelsen
Norwegian firm of piano makers and music publishers. The brothers Karl Hals (b Sörum, 27 April 1822; d Christiania [now Oslo], 7 Dec 1898) and Petter Hals (1823–71) set up as Brødrene Hals, piano makers, in Christiania in November 1847, having studied piano making abroad. They first made only oblique-strung upright pianos, but later changed to upright vertical and cross-strung instruments, better suited to the harsh Norwegian climate. They manufactured several thousand instruments and they also specialized in repair work. They received medals at exhibitions in 1862, 1866, 1867 and 1900. In 1890 the factory had 100 employees.
By 1869 their bichord and trichord upright pianos had three iron bars and metal plates bracing the deepest octaves, the larger trichord upright pianos having five iron bars with metal plates for all the strings. All vertical upright pianos had seven octaves whereas grand and cross-strung upright pianos had seven and a quarter octaves. In cross-strung upright pianos the strings were somewhat longer, giving a rich tone, the metal plate being fastened to an iron frame under the soundboard, and to three iron bars placed over it. The firm made harmoniums from ...