CABLE PROBLEM SOLVED.

Wanganui Chronicle, Issue 12881, 1 May 1913, Page 5

CABLE PROBLEM SOLVED.

HOW OCEAN AND LAND WIRES

QAN NOW BE LINKED

'File sending of a telegraphic messageround, the world without retransmission by human agency at the-, terminate «£- ---tht> oee&n cables-and the land lines: is; ■hVjitld possible by the invention of Miv: oott. the chief engineer of tlio Oomniercial Cable Comuany. 'The invention solves tho problem of transmitting: messages over. long-distance submarine: cables in the Mor.se code, which hasbeen hitherto impossible. We are now inblo to give an outlino of the" method;! ;>y which thesa results have been accomplished.

" The international Morse code,... which is now used for tnansmiiSßioit overland," said Mr. Gott recently to <v. ■J/cndon reporter, "xeproduces lottors by a varying .number of dots amir. dashes Tho letter H. for instance, consists of four dots. 'Owing to difficulties that have not been surmounted hitherto, the Morse-code, in its simple • foT-m. could not'be transmitted by sub-n-ariho cable. The Letter H insteadhiaG been represented by a series of: ; wavy lines, and* no jnadiiiie exists tlisit .can translate those lines into the dots-. and dashes requisite for the' Land .wiresBy the old submarine cable system eachr lioL of tlio letter H;require<t the same tjpe of current;. For the 'four H dots • l<nr f)ositive currents would be requir— •ot , and four negative* currents would, provide, the spaces between the dots. lie, ray system the four H dote ar o produced by^two positive ,and two negative - cun-ents acting alternately. Each suo- : ceeding. unit of .alette.v is, in fact, proceeded by a current of rererso polarity- . *-y that preceding it. _ " Tho secret of tho whole thing lies in tho manner in. which the currents are despatched. The principle is an as-■t-oundingiy simple one, and the apparatus required of quite/small cost. Noextra demand is made upon tho operator transmitting; in fact, he will not recognise, any difference.

.1 'A TENTS IN FORTY COUNTRIES... *'The most ingenious part of tlie discovery lies in the foot that the <dk~ diargo from th© cabk is used far cf--voting the ■reversal of the current between each unit signal. This di*eharrm «Jich Jia s alvrays. been sent to ear* Jirhorto^ will now he called tman in-poitw-m in an automatic manner what would otherwise .require an immense amount of mechanical work. Messages. ; have been already transmitted from t1";!^ 0 Af ° York b-v the Wheat-' >tvHie Morso transmitter, and patents"'-. i-'ave *eon taken .out in forty countries. ~r 1 feasibility of using tho Interrvir 01?1^ 50 f?" stei!' for Emission «ith tho human link that has beenr rjcesjary lntherto-at the station roceh^L "mo- -f Oablf lnossag? ««d retransmit-:" -nip, it overland or vioo verm. It ha*--been impossible to eliminate humanerror for every man has his pernSorrm- ? n S ?i tO traeP. P™cticaUy alt the - S" that have hithertorx feted. \ou can see that by eubstf-' tutmg an automatic relay between KkSrSS." ■ aCCUracy nevCT befow »,,- Questioned urton tho adranta«ea tlmf