Word: electronic
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Dates: during 1950-1959
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Behind the line-covered viewing screen is a "grid" of fine parallel wires, one wire for each group of phosphor lines. At the narrow rear end of the tube is a single electron gun that shoots a slender beam of electrons through the wire grid at the viewing screen. As in all television tubes, the electron beam scans at a rapid rate, painting an ever-changing picture on the screen of phosphors...
...Electron Switching. The trick in color television is to make the electrons that represent red, for example, hit the phosphor that glows in red. In the Lawrence tube, the wire grid does this switching job. It is hooked up, through the proper electronic apparatus, to the signal that comes over the air. When the signal tells it that certain electrons represent red, the wires of the grid are charged with enough electrical potential to focus the electron beam onto a line of red phosphor. When "green" electrons come along, it switches them to green phosphor, etc. So, jumping from phosphor...
...image of the object to be photographed is first focused on a glass plate covered with an antimony and cesium compound, which gives off electrons when struck by light. At every point in the image electrons are knocked loose. Off to a slow start, they are whisked away at tremendous speeds by a powerful electric field. Then they are focused by a magnetic lens (as in an electron microscope) to form a new image on a photographic plate. The speeded-up electrons have taken energy from the electric field and form an image about 100 times stronger than the original...
...sources are made by "cooking" cobalt or tantalum tubes (13½ in. long) in Brookhaven's nuclear reactor at Upton, N.Y. There the original metals turn into cobalt-60 and tantalum-182, both of which emit gamma rays with more than 1,000,000 electron volts of energy...
...research headquarters at Princeton, N.J. Dr. Zworykin (who joined RCA in 1929) and his colleagues, under Vice President C. B. Jolliffe, brought many other startling developments : the electron microscope, the infrared "sniperscope" which enabled World War II G.I.s to knock off skulking Japanese troops at night, "shoran" for accurate blind-bombing. In World War II, RCA turned out an estimated $500 million worth of devices for the armed forces. Now it has big defense orders, many for products no one else can make...