SECRET WIRELESS INVENTION.

Taranaki Herald, Volume LXVIII, Issue 16869, 16 October 1920, Page 3

SECRET WIRELESS INVENTION.

END OP “EAVESDROPPING.” LONDON, August 28. Successful demonstrations of a new wireless invention which marks a step towards the secrecy of wireless telephone and telegraph messages have taken place in England, and Senator Marconi is at present conducting further tests at sea in his yacht Elettra with a view to its wider application. Details of the invention are secret, but it may bo stated that an apparatus has been devised which, by what experts call an “electrical method of coil- - oentration," propagates the electric waves in a ,f beain” in any desired direction, and in that direction only. Hitherto the electric waves sent out from wireless stations have spread out in all directions and all who “listenedin” could hear. The now invention will mark the end of the wireless “eavesdropper.” When it is perfected a wireless station will be able to send out Morse or spoken messages which will be heard only by those for whom they are intended. The new apparatus, which is being worked at an experimental station in England with a short-wave length, has recently been demonstrated to a number of experts, who expressed the greatest interest in the discovery. It is known that Gorman wireless research has been lately closely directed to this problem of the “eavesdropper,” for tho Gormans realised that we were able to pick up with our listening sets much valuable information about Zeppelin movements during tho war.