THE DEVELOPMENT OF A PHOTOMEMORY

A description of the demonstration reading and The reading system, utilizing five reading channels, was operated with a complete 2 x 2 inch data plate conaining 0.004 x 0.016 inch bits. An address was set into the reader by a toggle-switch register and the data plate scanned. Upon coincidence between the address and the scanned data, the data was visually displayed on a lamp bank. Writiwriting system is given as well as a description of the computer input device built subsequent to achieving reliable operation from the reading system. The reading system, utilizing five reading channels, was operated with a complete 2 x 2 inch data plate conaining 0.004 x 0.016 inch bits. An address was set into the reader by a toggle-switch register and the data plate scanned. Upon coincidence between the address and the scanned data, the data was visually displayed on a lamp bank. Writing experiments have been carried further in testing the glow modulator tube driver. The ambient light level from the glow modulator tube was eliminated thus allowing a higher contrast to be obtained. An input device for the IBM 1620 computer was built. This unit utilized nine reading channels and a 2 x 2 inch data plate containing 0.005 x 0.010 inch bits. The unit was designed to present information to the 1620 at an aveage rte of 8000 digits per second. (Author)