Stroh, John Matthias Augustus
(1828–1914)
Stroh, John Matthias Augustus (1828–1914) German inventor, born in Frankfurt-am-Main. A U.K. post office employee, he made a cylinder phonograph for the chief engineer of the General Post Office and demonstrated it to the Royal Institution on 1 Feb 1878. He then designed various improvements to steady the cylinder movement with counterweights and a clockwork train. His most renowned invention was the Stroh violin. His son Charles was an industry executive, a director with the Russell Hunting…