television :: essays research papers

Television was not invented by a single inventor, instead many people working together and alone, contributed to the evolution of TV. 1831 Joseph Henrys and Michael Faradays work with electromagnetism makes thinkable the era of electronic communication to begin.1862 Abbe Giovanna Caselli invents his "pantelegraph" and becomes the first person to transmit a still image over wires.1873 Scientists May and Smith experiment with selenium and weightlessness, this opens the access for inventors to transform images into electronic signals.1876 Boston civil servant George Carey was thinking about complete television systems and in 1877 he put forward drawings for what he called a "selenium camera" that would allow people to "see by electricity." Eugen Goldstein coins the term "cathode rays" to describe the light emitted when an electric current was forced through a nihility tube.Late 1870s Scientists and engineers like Paiva, Figuier, and Senlecq were sugg esting alternative designs for "telectroscopes."1880 Inventors like Bell and Edison theorize about telephone devices that transmit image as well as sound. Bells photophone used light to transmit sound and he wanted to advance his device for image sending. George Carey builds a rudimentary system with light-sensitive cells. 1881 Sheldon Bidwell experiments with telephotography, another photophone.1884 Paul Nipkow sends images over wires utilise a rotating metal disk technology calling it the "electric telescope" with 18 lines of resolution. 1900 At the Worlds Fair in Paris, the 1st International Congress of electrical energy was held, where Russian, Constantin Perskyi made the first known use of the word "television."Soon after, the momentum shifted from ideas and discussions to physical development of TV systems. Two paths were followedMechanical television - based on Nipkows rotating disks, andElectronic television - based on the cathode ray tube work done independently in 1907 by English inventor A.A. Campbell-Swinton and Russian scientist Boris Rosing. 1906 lee(prenominal) de Forest invents the "Audion" vacuum tube that proved essential to electronics. The Audion was the first tube with the ablity to amplify signals. Boris Rosing combines Nipkows disk and a cathode ray tube and builds the first working automatonlike TV system.1907 Campbell Swinton and Boris Rosing suggest using cathode ray tubes to transmit images - independent of each other, they both develop electronic scanning methods of reproducing images.American Charles Jenkins and Scotsman John Baird followed the mechanical poseur while Philo Farnsworth, working independently in San Francisco, and Russian migr Vladimir Zworkin, working for Westinghouse and later RCA, advanced the electronic model.