Dialing Stations

Radio Record, Volume I, Issue 49, 22 June 1928, Page 3

Dialing Stations

RADIOPHONE INVEN.TION _ FOR SHIPS, "PLANE OR TRAIN A SYSTEM by which large radi¢ telephone stations can establish’ contact with each other by "dialing" & number, which, if linked with wire telephone exchanges of large cities, will enable users to "dial" a ship af sea, an aeroplane in flight, or a pera son on a radio-equipped train travel« ling across the country, was revealed recently by Lewis M. Clement, chief engineer of I’. A, D, Andrea, Incg radio set makers of Long Island City, U.S.A. Mr, Clement is a joint pat. entee of the new radio system with S. B. Williams, automatic telephong expert of the Bell Telephone Laborae tories, New York. How the System Will Work. ad hee radio dialing device can never be expected to supplant present day telephone wire systems, but some day subscribers in their homes may be able to dial a number and be automat~ ically connected with telephone ex changes on ships or isolated places, td which wires cannot be run," said Mr, Clement. "The two systems, wire and radio, could be easily used together, and operated by the user just as the ordinary dial phone is used to-day." The Fada engineers described the op eration of the device as follows :- "Suppose we have three channelg or toll links to cities A, B, and 6, which operate on separate frequencies. From a series of contacts on a dial the user would be able to select one of the waves to the city wanted by dials ing the proper first letter or number, This would automatically start up @ transmitter in the local system, and affect the apparatus at the receiving end. If the line was being used, the busy signal only would result, but if not, the next letter or figure dialed at the calling telephone would select the exchange in the distant city. The third letter would make further selection, and so on, until the telephone subscriber’s number is obtained and the bell rings, announcing the call," Possibilities of Use. NV R. CLEMENT said the number of different exchanges or telephones which could be called would pe very great if a sufficient number of letters in the dialing number were used. He predicts that his device, whic! is similar to apparatus used at pres sent in automatic wire exchanges, will have its earliest application in ship and aireraft communication worky where wire lines are impossible, Trouble on the line or radio circuit is to be indicated in the same fashion as now revealed on the wire circuits of the country. There is no immediate field of application for the system out~ side of its possible use for aircraft conmmunication work, but the future may find it applied even to inter-city, serviee, he said.