Mechanical Television Jenkins Drum PrototypeThe first version of this scanner appeared in 1928. It used a drum scanner and a multi-section neon tube: Radio Movies and Television for the Home - Radio News, August 1928 In late 1929, the mehanism was altered somwhat and put in a cabinet: Invisible text to format smartphones. xxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxx xxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx |