TELEPHONY & TELEGRAPHY

Dominion, Volume 13, Issue 211, 1 June 1920, Page 5

TELEPHONY & TELEGRAPHY

INVESTIGATION OF NEW DEVELOPMENTS. To inquire into the latest develop* merits in telephony nnd telegraphy, Mr. E A. Shrimpton, Chief Telegraph En-, cineer of the Dominion, will .leave for. England next month. One-jmportanfr object of the visit is to settle the con-j structional details of the new telephone.' cable, which is to be laid in Cook Strait, This cable irill.be laid be* ( tween a point near Waikanao nnd Pic-, ton, a distance of 60 miles (approximately). Submarine telephone cables have) been in use between England and Ireland, England and France, and even to, Germany, but, though heavily armoured. Alley have not proved altogether satis*; factory owing to induction _ troubles*" Now, however, the difficulty is said to have been overcome. The only piece or, 6ea cable to be U6ed in New Zealand will bo the section across Cook Strait:' For 30 miles.of its length'(under tho open Strait) the cnblo will have to be heavily armoured, hit the other half, will lie quietly enough in the mud an the bottom of the Sounds., ! Another very important development; in telegraphy, said Mr.' Shrimpton yes-, terday. was the Murray ma'chiiie-print-ing telegraph apparatus (the invention}, of a New Zealnndcr), which was likely,' to prove a revelation in respect to the sending of Press work. For instance, a man in The Dominion office, who wisli-i ed not-only to supply his- own paper, but to send the same message to papers in Christchurch, Timnrti, Oamaru, and' Dunedin, could sit at his special type-' writer, and at the same time as ho typed out tlio message for his own paper, it would be printed in the {our > telegraph- offices in tlio South Island*' That had been made possible by the application of the multiplex principle to' the llurray machine. One of those lun-* chines was on order for uso in New/ Zealand. I

Still another matter of importance to' be investigated is the country automate telephone exchange, which will irivo rural districts a continuous service.! This has been tried out in America and found to Rive the ■"greatest satisfaction.