Edison Records
Thomas A. Edison invented the phonograph, the first device for recording and playing back sound, in 1877. After patenting the invention and benefiting from the publicity and acclaim it received, Edison and his laboratory turned their attention to the commercial development of electric lighting, playing no further role in the development of the phonograph for nearly a decade. Edison's original phonograph recorded on sheets of tinfoil and was little more than a crude curiosity, although one that fascinated much of the public. These earliest phonographs were sold mainly to entrepreneurs who made a living out of traveling around the country giving "educational" lectures in hired halls or otherwise demonstrating the device to audiences for a fee. The tinfoil phonograph was not fit for any real practical use and public interest soon waned.
Recorder (musical instrument)
Today, makers maintaining individual workshops include Ammann, Blezinger, Bolton, Boudreau, Breukink, Brown, Coomber, Cranmore, de Paolis, Ehlert, Grinter, Marvin, Meyer, Musch, Netsch, Prescott, Rohmer, Takeyama, von Huene, and Wenner. French maker Philippe Bolton created an electroacoustic recorder and is among the last to offer mounted bell-keys and double bell-keys for both tenor and alto recorders. Those bell-keys extend easily the range of the instrument to more than three octaves. Invented by Carl Dolmetsch in 1957, he first used the bell-key system publicly in 1958.