Word: mica
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Dates: during 1930-1939
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Last summer the skilled hands of RCA-Victor Co.'s Dr. Vladimir Kosma Zworykin fashioned the closest known approximation of the human eye (TIME, July 10). Designed for television, the device was called the iconoscope. On 20 square inches of mica were 3,000,000 dots of photosensitive material. Light falling on the mica set up an electromagnetic tension which was discharged by an electron beam. The changing pattern of this discharge could be transmitted by radio. At the receiving end the image was reproduced on a fluorescent screen by a reversal of the iconoscope's operating principle...
...equipped with a 2,000-inch mirror, were outlined by Dr. Francois Henroteau of Ottawa's Dominion Observatory. The projected telescope will be electrical, not optical. Dr. Henroteau and his aides have discovered how to deposit 25,000,000 minuscule silver dots on a square inch of thin mica plate. Starlight falling on the silvered mica will be scanned by photoelectric cells, which will convert the image into feeble electric current, which in turn will be amplified tremendously by three-electrode vacuum tubes. The result will be a photograph clear enough to bring remote stars into Earth...
...Belgian Army major named R. van Rolleghem produced a miniature airplane fuselage composed of a secret material which looked like mica-coated asbestos. In the cockpit, in place of pilot & observer, he lodged two white mice. Then he ignited the fuel in the machine's nose. The terrified mice were not even singed...
...mosaic on the mica is in effect a photo-electric cell flattened out and each particle is a tiny photocell in itself. When lights and shadows of any scene fall upon those particles, the light waves set up a positive electro-magnetic tension in the particles. The oscillating cathode beam of electrons discharge that positive tension. Thus each particle is alternately charged by light waves and discharged by the electron beam 24 times a second, which is a comfortable frequency of illumination for the human...
This process in the particles on the mica screen in turn modulates a high frequency current which passes over the mica mosaic. That current can be connected to a radio system...