SIMULTANEOUS SENDING OF SPEECH AND MORSE

Manawatu Times, Volume LIV, Issue 6852, 6 March 1929, Page 7

SIMULTANEOUS SENDING OF SPEECH AND MORSE

Beam Achievement

BRINGS REVOLUTION IN WIRELESS TELEPHONY

COMMUNICATION CHEAPENED.

United Press Association— By Electrio Tolegraph—Copyright. Received Tuesday, 7 p.m. LONDON, March 3.

The Daily Mail reports that another revolution in wireless telephony achievement was demonstrated at the Bridgewater beam station. Speech was transmitted 3000 miles to the Marconi Company’s vice-chair-man at Montreal by a- multiplex system, on the same wave-iength simultaneously with two wireless telegrams, which were being uninterruptedly relayed at London at the Tate ol hundreds of words per minute. The invention incorporatees a unique degree of efficiency and economy, and may be applied to all the beam stations in the Imperial chain, avoiding the necessity of erecting new or adding to existing telephonic stations. Sir Basil Blackett, chairman of Imperial Communications, Ltd.; Mr. G. E. Kelleway, general manager of Marconi’s, Ltd.; and other high officials; and Mr. Mathieu, inventor of the process, witnessed the demonstration and carried on conversations with perfect audibility with officials at Montreal. . Spoken messages are regulated, fading is checked, and uniformity of tone is maintained.

Immediately one speaker pauses, an automatic regulator permits tho answer to come, but simultaneous speaking jams the communication. The invention secures almost complete secrecy, and listening-in is impossible without a similar installation.

Apparatus is being prepared for the South African beam station. Imperial adoption of the system would enormously cheapen communication, enabling four telegraphic and one telephonic communication to be made on the same wave-length simultaneously.