New-York tribune., 1922-06-21
Marconi Declares Device
Will Concentrate Rays
in Ether and Project
Them at the Objective
Brings Order Out
OF Aerial Chaos
acknowledgement to
Short Wave Lengths, He
Tells Engineer Audience

Application % The radio search
light" 70 the safeguarding Of ships At
sea was described Las, nigh, by Gugliel-
mo Nnreoni in lecture before the
Engineering Societies. The searehlight
is q device % wires for subdung the
wireless Babel 81 the ether and bring
ing out ~ the confusion orderly lines
of Communication. or beams ~ wire
less. instead Of throwing them broad
cast from housetop or masthead
BY rs use. Signor Mareoni said, a
steamship had been enabled. during
an experiment. 20 get her bearings
within quarter Of point o. the
compass. The apparatus concentrates
the wireless waves and shoots them
toward a given objective IN much the
way that the long finger of light Of
the searehlight is directed
Foresees Radio Lighthouse
Marconi believes that a radio light
house will be possible with these re-
Aectors. II arranged - that they re-
volve. throwing tho wireless beam In
complete circle
III seems 10 me- ,he inventor said.
that IL should he possible 70 design
anpara'us hy means OF which ship
should radiate or project divergent
beam OF the short wave rays In any
desired direction, which rays, II com
ing across metallic object. such As
another ship. would be reflected back
A. once. and thus reveal the presence
Of the other ship in fog or thick
weather.
This transmitter and reflector re-
volving. act a. a kind Of wireless light
hou.e. or beam. and by means OF the
revolving beam Of electrical radiation
il Is possible for ships, when within
certain distance, 10 ascertain IN
thick weather the bearing and position
81 the lighthouse.
"One further advantage OF such an
arrangement would be that IL would he
able 10 give warning OF the presence
and bearing Of ships, even should
such ships be unprovided with any
kind ~ radio
Signor Marconi had lantern slides. H.
lustrating types Of these wireless re-
aeetors They showed wire network at
tachcd 10 wireless masts. designed 20
gather tho waves into a ray and pre-
vent them from spreading 70 all points
OF the compass.
He said that he had succeeded first
in Italy in rejecting radio signals for
a distance of six miles with three
and ore-haf meter wave. Al Carnar-
Won, in 1919, he made other expert
ments. using q fifteen meter wave. This
time the distance was more than
,ripled
Voice Carried Twenty Miles
After overcoming a few practical
difficulties the speaker continued,
strong. clear speech was received at
Holyhead, twenty miles away.
As result OF these experiments. il
was decided 70 carry out further tests
overland. They we're made between
London and Birmingham. distance o,
ninety-nine miles. They proved posi-
lively that. using reheetors al both
ends. good and clear speech could be
exchanged ~ all times between the
two places"
Signor Mareoni said that song or
speech transmitted by radio telephone
could be heard By the receiver 200
times louder than is possible with the
usual types Of equipment, and. IN ad-
dition. can be received without dis.
toriion ~ word or tone. II also
doubles the functions Of a single aerial.
as the reflector permits transmission
and receiving TO proceed at the same
time.
while the present brosdeasting sta
tions. Marconi said. radiate in all d.
reetions. like the sun. the reflector,
or scarchlight method. will make wire
less communication personal, II not
secret. 10 very large extent.
Short wave length radio, the inventor
said. should now receive more studious
attention from wireless engineers. He
had returned 20 his original idea OF
twenty years ago Of employing short
rather than long waves. and told OF
many successful experiments. Now
that millions Of amateurs are using
wireless and the air in a turmoil with
waves running from 200 10 10000
meters. Marconi said that the short
wave offered promising research posi-
bilitics.
Disturbances caused by static can
be said 20 be almost non-eyistent when
short waves are used" he explained.
fcsn,issse 90 pss. tour