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1913 __ Motion Pictures by Wireless — Television for amateurs
Charles Francis Jenkins (1867-1934)
Comment : “In the next number of the Exhibitor's Times, we will print an article of transcendent interest upon a them which with we dealt in the second isue of the paper. This article was headed the "Transmission of Motion Pictures by Wire". A method of accomplishing this is attributed to Mr. C. Francis Jenkins, of Washington, D.C. Mr. Jenkins has been good enough to give us a special and exclusive interview in which he outlines a method whereby the sending of motion pictures over the wire as on one sends an ordinary telegraphic or telephonic message has the possibility of being transcended in practical interest by an even greater distance, namely, the transmission of motion pictures by wireless. Not to anticipate the interesting details with which Mr. Jenkins has supplied us, we go far as to say that, in our opinion, the time is not far off when this theoretical marvel will be made a practical accomplishment. Within the memory of living people, such modern utilities as telegraphic and telephonic messages were considered not merely impracticable, but impossible. Only a few years ago the idea of that photographs could be sent by wire was considered in the nature of a wild dream, and yet as we have pointed out already, thanks to the enterprise of Mr. William Rendolph Hearst, photographs have been sent by cable from New York to London. And now, writing in the popular and not the strictly scientific sense, it is just as feasible for motion pictures to be sent by wire as it is for ordinary still photographs. Even more so, it is just as feasible for motion pictures to be sent by wireless as it is for simple written messages to be so sent. We refer the reader, however, to Mr. Jenkins' own description of his method which will be printed in our pages next week.". ("Motion Pictures by Wireless - Wonderful possibilities of Motion Picture Progress", Moving Picture News, 27 September 1913)Mr. C. Francis Jenkins published an article on "Motion Pictures by Wireless" in 1913, but it was not until 1923 that he transmitted moving silhouette images for witnesses, and it was June 13, 1925 that he publicly demonstrated synchronized transmission of pictures and sound. He was granted the U.S. patent No. 1,544,156 (Transmitting Pictures over Wireless) on June 30, 1925 (filed on March 13, 1922). (Compiled from various sources)The army of approximatively 20,000 radio amateurs may be on the threshold of a new and fruitful period of experimentation. Radio vision -- the sending and receiving of photographs, sketches, scripts and autographed letters -- is now in its infancy, just as radio telegraphy was 20 years ago. This revolutionary system of the transmission and reception of distant scenes, by radio has been [given] sound in principle; it remains now for the real experimenters to translate the laboratory achievement into practical performance. [...] In Use.This so-called service to the eye, to quote Mr. Jenkins, in introducing the system to the United States Post Office Department, is "a method of transmitting messages by radio instead of by steamship, Washington to Panama in five minutes. It has the authentic character of an autographed letter and the speed of radio. It is the beginning of a radio service to the eye, where heretofore radio has been an address to the ear only. Will the time soon come when the Post Office Department will deliver by radio photographic copies of our business letters at the speed of light, rather than the relatively laggard delivery of the originals by mail plane ? Such an exchange of intelligence would wonderfully speed up industry because, like an army, industry can go no faster than its means of communication". [...] The action of the apparatus is the simplest possible. The picture to be transmitted is drawn on paper with a copper sulphate solution in such a way than when the needle passes over the written lines the chemical ink transmits an impulse through the cylinder and needle, which is, in turn, sent into the radio transmitter. At the receiver, an amplifier is used after the detector, and the amplified impulses sent out by the transmitter are passed to the receiving pen and cylinder. A paper moistened with potassium iodide or ferrocyanide is placed on the receiving cylinder. When the amplified current passes through the needle the electrolytic effect discolors the paper giving perfect reproduction of the original picture. (S.R. Winters, "Television for Amateurs", Radio News, May 1925, p. 2091)
Urls : http://histv2.free.fr/jenkins/jenkins1913.htm (last visited ) http://histv2.free.fr/jenkins/winters.htm (last visited )

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