Once the basic principle of the phonograph was discovered, the years of arduous work on its development by Edison and others dealt largely with the composition and handling of materials for ...
Graham Bell had made a discovery which, for scientific interest, would rival the telephone and phonograph, and that he had deposited in a sealed packet, in the custody of the Smithsonian Institute ...
But Thomas Edison, ever one to dance to the tune of his own phonograph, had his own thoughts. When setting up a new office with its first phone system, Edison proposed this to a colleague ...
The component in a phonograph turntable that holds the stylus, which is a needle attached to a cantilever arm. The vibrations of the stylus are transferred into electrical energy by a magnet ...