Show I Contributes Inventions J JI I I A surprising number of to today's today's today's to- to days day's living conveniences and necessities can be traced to either inventions or developments developments developments develop develop- ments of the Bell System IT ALL started with Alexander Alexander Alexander Alexan Alexan- der Graham Bells Bell's electric speaking telephone in 1875 Bells Bell's apparatus included important important important im im- im- im advancements in the speaker and microphone which later became key elements in the development of radio Radio however didn't get get- very far until Harold Arnold I a Western Electric scientist got hold of Lee DeForests DeForest's I crude audion tube in 1912 and andI I developed the modern vacuum tube The vacuum tube is now i being replaced by the transistor tor another Bell Laboratories invention I RADIO DIDN'T mean much mucho to o the average homeowners i until Western Electric the manufacturing unit for the Bell System set up the first firsti i experimental radio station in inI 1919 This started the ball I rolling for commercial broadI broad broad- I casting Thomas Edison invented the movies but the Bell System I invented the first commercials commercially commercial commercial- s I ly Iy successful talkie Henry C. C Harrison a Bell Labs engineer engineer engineer en en- designed the Vita- Vita I phone It was a system designed designed designed de de- signed to synchronize phonograph phonograph phonograph graph records with the movie reel and was used in the first I sound motion pictures Don DonJuan DonJuan Juan in 1926 and The tiThe Jazz Singer in 1927 EDWARD C. C another Bell Labs engineer invented a method of oC imposing the sound track directly on the movie film It soon replaced the Vita- Vita phone and has been used in 90 percent of the motion pic pie I I tures produced since then perfected the con- con microphone in 1916 I This led to the first electrically electrical electrical- ly produced phonograph recordings recordings recordings re re- in 1924 A BELL Labs scientist Alexander Alexander Alexander Al Al- M. M Nicholson developed developed developed de de- de- de the crystal phonograph phonograph phonograph graph pickup in 1919 This I paved the way for the development development de de- I of stereophonic music which was first demI demonstrated demonstrated dem dem- demI I I at the New York YorkI I City Bell Labs in 1933 I II Television is nearly ancient I I II I history to the Bell System i Scientists at the Bell Labs 1 I now perfecting the video- video 1 i telephone set played a large I part in m bringing TV into more than 40 million U. U S S. S homes The first public demonstration tion of TV transmission over telephone wires took place in I 1927 I MANY OTHER important firsts were a result of Bell System research and development development development develop develop- ment the first cathode ray receiver in 1923 the first com- com merical TV transmission service service I ice in 1937 the first major sports broadcast in 1946 the I first transcontinental TV transmission transmission trans trans- mission network established I in 1951 the first color TV network in 1954 1959 and the first transmission via satellite i accomplished in 1962 I |