Word: vacuums
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Dates: during 1920-1929
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Professor E. L. Chaffe, G. '11, spent his summer in Vermont woods near President Coolidge's home. During his spare hours, he worked on a book to be published some time next year. The subject of the book is "Thermionic Vacuum Tubes...
Edward Prizer, President of Vacuum...
...United States patents have been granted to American inventors for the telegraph, the telephone, the sewing machine, the vulcanization of rubber, the moving picture, the phonograph, the incandescent light, the typewriter, the automobile, the sleeping car, the electric car, the linotype machine, the vacuum cleaner, the aeroplane and the leading features that make modern radio possible...
...both ends are started simultaneously and turned at the same rate of speed. The light beam travels in a continuous line over the picture, until it reaches the opposite side. In the center of the cylinder is a "photoelectric cell," consisting of a rod of potassium in a vacuum tube. It is so sensitive to light that any ray falling on it causes the electrons to fly from its surface, generating an electric current. As the cylinder revolves, the point of light passes through the transparent film and falls upon the potassium. In the dark parts of the picture less...
...Major Gen. George O. Squier, former chief Signal Officer, U.S. Army, reporting the results of recent experiments in ocean cable work, stated that a universal automatic telegraph transmitter, applicable to radio, land lines and submarine cables, has been tested on artificial cables in the laboratory. The electron vacuum tube is facilitating the new development; an undreamed-of degree of cable efficiency will be possible by amplification of received cable signals. Cable and radio telegraphy each have their natural sphere of utility and are not essentially in conflict...