PHOTOS BY RADIO

Radio Record, Volume I, Issue 40, 20 April 1928, Page 5

PHOTOS BY RADIO

A SUCCESSFUL TEST The first practical test of the Cooley "Ray-foto" apparatus, -a system of broadcasting photographs by radio, was made on . recent morning between 8 and 9,30 o’clock over Station WOR, Kearney, New Jersey, U.S.A., on 242 metres. One of the official observers, who intercepted the photographs on a Cooley receiver in Queen’s Village, said that from his viewpoint the first test was to be considered a success. Austin G. Cooley, inventor of the device, personally gave instructions to the observers over WOR’s imicrophone. Fifteen pictures in all were transmitted, taking about two and one-half minutes each. "Three methods were used in the first test," said the observer. "The first, or acoustic, where the output of a speaker connected to the ‘converter’ was placed before the microphone of the station; the direct method, where the transmitter was connected by wires to the converter which was worked direct from either a positive or negative film of the picture; and the phonograph method, where tlre picture or message was ‘reproduced direct from that record."

Mr. Cooley issued a statement saying that the demonstration was a preliminary test, "These," he said, ‘are-necessary tech-« nical tests prior to the official . public test, the date of which is to be ennounced, So far our results have been entirely satisfactory" On a previous afternoon a picture of Mayor Walker, of New York, was transmited from the WEAF station at Bellmore, L. I, to receivers in the WEAF studio at 711 Fifth Avenue, New York, and the home of Dr. A. N. Goldsmith at 450 West End Avenue, New York, by means of photo-radio apparatus invented by Dr. E. F. W. Alexanderson of the General Electric Company. The Cooley tests, similar to the Alexanderson tests, utilised standard radio receivers in conjunction with. special facsimile transmitting and receive ing apparatus in the picturee broad. casts.