- Anne Beetem Acker
French piano manufacturer, founded in 1831 by Jean-Georges Kriegelstein (b Riquewihr, Alsace, 1801; d Paris, France, 20 Nov 1865). Having arrived in Paris in 1815, he was listed as a piano maker there by 1824, and worked for Jean-Henri Pape from 1826 until 1831. In partnership with Arnaud (about whom nothing is known), he exhibited two square pianos in 1834, one with an upstriking action and one with a downstriking action, the latter receiving a silver medal; it was patented in 1833. At this time, Kriegelstein and Arnaud, of rue des Petites-Stables, employed 20 to 25 workers who made 70 pianos per year. Kriegelstein and the French composer Charles Plantade were partners from 1838 until at least 1849 with a factory at rue Laval, St Georges. In 1839 Kriegelstein patented a grand piano nut and a damper system. Another patent of 1841 was for an Agraffe with adjustable screw placed between the tuning pin and the bridge to adjust the tuning....