A Wireless Wonder.

Samoanische Zeitung, Volume 20, Issue 16, 17 April 1920, Page 3

A Wireless Wonder.

S-OS. THAT RINQS A BELL. NEW MARCONI INVENTION. The first demonstration of a new wireless instrument, enabling the operator in a ship 'in distress to ring loud alarm bells in all vessels' or stations within wireless range, was given in the Marconi,works, Chelmsford, Essex? When the; Titanic sank, a vessel was within.2o miles, but the dis-_ tress signals were not beard • wing to the operator being in bed. It is necessary for Ships to carry a special automatic tsansmitt' r and receiver, and wh?n, an emergency arises the operator presses the key of the transmitter, and in the fraction of a minute the signal, consisting ot Morse dots sent at exactly 180 per, minute; is being received by every vessel,within range carrying aVeceiver. and ? a bell is k>pt ringing until the operator establishes ordinary wireless communication. For the demonstration a-portable wireless wan stationed 30 miles away at Shalford.-and upon a pressman telephoning by wireless the device was: put intox)peration. The dots could be,heard at,the receiyar, and the hell rang until stopped The, range is not limited, but depends upon the power of the trans ruitTer., Eighty miles is considered a usual; and; a sufficient distance During the war the device, was used for exploding/ mines, etc , and an ' illustration of its efficacy/ was mode _ gunpowder being wireless sent from' 36 miles away