Читать книгу The Radio Amateur's Hand Book - A. Frederick Collins - Страница 5

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 Frederick Collins, Inventor of the Wireless Telephone, 1899. Awarded Gold Medal for same, Alaska Yukon Pacific Exposition, 1909

 Collins' Wireless Telephone Exhibited at the Madison Square Garden, October, 1908

 General Pershing "Listening-in"

 The World's Largest Radio Receiving Station. Owned by the Radio Corporation of America at Rocky Point near Port Jefferson, L. I.

 First Wireless College in the World, at Tufts College, Mass

 Alexander Graham Bell, Inventor of the Telephone, now an ardent Radio Enthusiast

 World's Largest Loud Speaker ever made. Installed in Lytle Park, Cincinnati, Ohio, to permit President Harding's Address at Point Pleasant, Ohio, during the Grant Centenary Celebration to be heard within a radius of one square

 United States Naval High Power Station, Arlington, Va. General view of Power Room. At the left can be seen the Control Switchboards, and overhead, the great 30 K.W. Arc Transmitter with Accessories

 The Transformer and Tuner of the World's Largest Radio Station. Owned by the Radio Corporation of America at Rocky Point near Port Jefferson, L. I.

 Broadcasting Government Reports by Wireless from Washington. This shows Mr. Gale at work with his set in the Post Office Department

 Wireless Receptor, the size of a Safety Match Box. A Youthful Genius in the person of Kenneth R. Hinman, who is only twelve years old, has made a Wireless Receiving Set that fits neatly into a Safety Match Box. With this Instrument and a Pair of Ordinary Receivers, he is able to catch not only Code Messages but the regular Broadcasting Programs from Stations Twenty and Thirty Miles Distant

 Wireless Set made into a Ring, designed by Alfred G. Rinehart, of Elizabeth, New Jersey. This little Receptor is a Practical Set; it will receive Messages, Concerts, etc., measures 1" by ⅝" by ⅞". An ordinary Umbrella is used as an Aerial