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RADIO AGE for September, 1925
The Magazine of the Hour
21
It Now is But a Matter of Time Before the Latest in Receivers — the ^Radio Vision Outfit, Will Be in Every Home
C. Francis Jenkins and the prismatic ring of lens or disk whereby motion pictures were sent and received by radio.
"Television A Fact at Last,' Says Jenkins
By S. R. WINTERS
This photo shows Mr. Jenkins and the motion picture projecting
machine carrying a scene of a Dutch windmill, the first movie object
sent and received by radio.
THE picture flashed on the screen in a motion picture theater is taken off and put back on 16 times a second, with the human eye unable to detect the rapid intermittent changes. Similarly, by means of a revolutionary invention of C. Francis Jenkins of Washington, D. C, motion pictures may now come into your home by the medium of radio waves, the picture being completed with the unbelievable swiftness of onesixteenth of a second.
The first official demonstration was given by the Jenkins Laboratories on June 13 when the scenes of a dancing girl were transmitted to the homes of Hon. Herbert Hoover, Secretary of Commerce, and Colonel Paul Henderson, Second Assistant Postmaster
General, respectively. The machines for receiving these moving objects, including views on a standard motion-picture film as well as the movements of a dancer, included a small mahogany cabinet, the lid of which contains a miniature screen. Besides this there are a small electric motor for revolving a combination of lens disk and prismatic rings, and a tiny lamp, which flickers one-half million times a second.
Radio and Sound United
THIS radio-movie set, of course, includes a radio receiving outfit, together with a loud speaker. That is to say, radio sound and radio vision have been joined together, thus giving reality to the term "radio vision" or "television."
For instance, if a broadcasting station is transmitting "movies" taken from a theatre motion-picture screen, in the event that you are equipped with a Jenkins radio-movie set, in order to receive these pictures the lid of the mahogany cabinet is raised. The lid of this small cabinet or box contains a white screen upon which the motion picture appears as soon as a switch is pressed, which puts the instrument into operation. The closing of this switch not only places the radio receiving set in service but it starts the electric motor which drives the picture-receiving apparatus.
The mechanism for sending motion pictures by radio is not quite so simple as the radiomo vie receiving station. First, there is the conventional motion