New Britain herald., 1922-06-21
MARCONI INVENTION
 ID GUIDE WIRELESS
Announces Method of Directing
 Sound Waves in Straight Line

New York, June 21.-Senator Gug. lielmo Marconi, wonder man of wire. less. last night announced the inven. ton Of what might be called radio searchlight by means of which radio waves, which can be reflected like light waves, may be sent in a given direction in beam, instead of being scattered to all points Of the com pass.
 Will Rid Sea of Terrors
 The famous Italian said he believed this invention could be utilized in such manner as to rid the sea of some of its terrors, for with revolv- ing reflector, the transmitter would constitute a radio lighthouse, capable of flashing guiding beams nearly a hundred miles.
 Addressing a joint meeting of the Institute of Radio engineers and the American Institute of Electrical en- gineers on his latest discoveries, the inventor said of the proposed radio light:
 By means Of the revolving beam of electrical radiation, it is possible for ships, when within a certain dis tance. to ascertain in thick weather, the bearing and position of the light house.
 Could Locate Other Ships
 Tt seems to me that it should be possible to design apparatus by means of which ship could radiate or pro- Ject divergent beam of the short wave rays in any desired direction, which rays if coming across a metal lie object, such as another steamer. would be reflected back to a receiver on the sending ship, and thereby im- mediately reveal the presence and hearing of the other ship in fog or thick weather One further greater advantage of such an arrangement would be that it would be able to give warning of the presence and bearing of ships, even should these sl ,s be unprovded with any kind of l-dio."
 Marconi's radio searchight bears little resemblance to the battleship searchlight. It is rather special ar rangement of wires on towers or masts.
 Secret System Needed
 Marconi stated that the refiectors make it possible for the receiver to reproduce radio telephone song or speech about two hundred times loud CT than is ordinarily possible. What is more, speech is transmitted prac- tically without distortion, and the transmitting aerial can be used both sending and receiving at the same time M@.
 Tn these. days of broadcasting it may still prove to be very useful to have a practically new system which will be very large degree secret when compared to the usual kind of radio," he added
 Marconi expressed belief that in the development of radio communi- cation, the longer waves have so much absorbed the attention of inventors and engineers, that the time has come to conduct research il short wave lengths radio.
 No Static Interference
 Marconi discovered that when short waves are used. disturbances by static can be said to be all most non-existing, and the only inter- ference comes from the ignition ap- paratus of automobile and motor boats
 Incidentally" he added, T might mention that one of these short wave receivers will act as an accurate de- vice for testing whether or not ones ignition system is working all right. Some motorists would have a shock If they realized how often their spark plugs are working in a deplorably ir- regular manner"
 To overcome static, Marconi first determines the strength of the signal sent by a measuring apparatus and hen makes the signal strength equal 10 that of the distant transmitting stations.
 Adjustable Voltage
 If the signals are unreadable due % static" Marconi explained, "the measuring apparatu tus is used to send o an operator at a standard rate of .wenty words per minute, five letter ode, and the voltage applied to aerial | rom the local sender is increased un- | il complete readibility is obtained {" Thus, Marconi said he obtained, lat ,nce very correct estimate of how much power was needed to drive the lgnal through"
 Marconi has discovered that a cer- ain kind of static called grinder" )riEinateS over Africa and another