Edison with his Phonograph
Edison with his Phonograph In 1878 Mr Edison made a number of phonographs, which were exhibited in America and Europe, and attracted universal attention. The records were made in these on soft tinfoil sheets fastened around metal cylinders. For a while Mr Edison was compelled to suspend work on this invention, but soon returned to it and worked out the machine as it exists practically to-day. It occupies about the same space as a hand sewing-machine. A light tube of wax to slide on and off the cylinder is substituted for the tinfoil, which had been wrapped round it, and the indenting stylus is replaced by a minute engraving point. Under the varying pressure of the sound-waves, this point or knife cuts into the tube almost imperceptibly, the wax chiselled away wreathing off in very fine spirals before the edge of the little blade, as the cylinder travels under it. Each cylinder will receive about a thousand words. In the improved machine Mr Edison at first employed two diaphragms in 'spectacle' form, one to receive and the other to reproduce; but he has since combined these in a single efficient attachment.
Samuel Finley Breese Morse
Inventor of the Electric Telegraph In a short time he had worked out on paper the whole scheme of transmitting thought over long distances by means of electricity. And now began twelve toilsome years of struggle to devise machinery for his invention. To provide for his three motherless children, Morse had to devote to painting much time that he otherwise would have spent in perfecting the mechanical appliances for his telegraph. His progress therefore was slow and painful, but he persistently continued in the midst of discouraging conditions.
Robert Fulton
Robert Fulton [1765-1815] Robert Fulton was born of poor parents in 1765, in Little Britain, Pa. His father having died when the boy was only three years old, his mother took charge of his education. She taught him herself until he was eight and then sent him to school. But he had no liking for books, and made slow progress. Drawing and mechanical devices absorbed his interest, and nothing gave him greater delight than to visit the shops of mechanics and there with his own hands to work out his new ideas.