Daily Kennebec journal., 1911-03-13
A SCHEME TO DIRECT WIRELESS
Belini and Tosi Have Worked Out
Dirigble Field

The great problem that has been facing
the users of wireless telesraphy is how
tn arrange their sending instruments in
a way that will prevent messages from
being stolen. Various devices have been
tried in hope of attaining this end, hut
the first thing which looks like success
is the invention Of Bcllini and ToSi, t"o
Italian scientists, and has been lnsta!'cd
on on. of the French transatlantic liners
to be tried out. Several years ago 3iou-
del found that Il row of vertical aht"h-
nae, regularly spaced at double the dlS-
tancr Of the wave lengths they emitted,
Scnt out waves that were strongest when
perpendicular To the plane of The ant"h-
nae and zero ifr the plane itself ms
system is now used, if the following
translation from 4 French seiehtlhe
paper made for the Literary Digest Is 10
he believed .-
AS the system operated AZ trans
mittcr or as Il receiver. 1t enabled the
sending OF concentrated waves III given
direction OF their reception with greater
facility in one direction than in others
Thus fixed posts could be established cs-
pecially for communication with othef
fixed posts. interfering with others or
being interfered with by them In the ieas'
possible degree. If the system can DC
moved about vertical axis, the direc-
,ion of emission and reception may De
varied and communication is made pos
siblc. under the same condition. Win
posts situated in various directions. Inc
installation of such movable systems on
land is extremely awkward. since the an
tcnnac must generally be 10 to lS tec'
long and the wave lengths IN use vary
from. 100 to 900 feet, Offering great
practical difficulties. But it may be
realized on board ship, when there are al
least two high masts, serving as natural
supports for antennae. Except III
case of extreme danger, however, one
could scarcely imagine an Atlantic liner
stopping to turn around and find out the
best position for receiving message.
Belhni and Tosi have improved on this
plan by devising what they call diilgi-
Bile field" being the result of the supefpo-
sition of two Blondel rows of antennae
in planes at right angles to each other'
As the two are excited in different pro-
portions, the resultant field may &c maze
to occupy a position at any desired angie
The result is the same If the wires ana
their mountings were caused to rotate
physically. 1t is also possible, by then
system. to detect at once the proper posi-
tion for receiving il given message. and
IN place the field at the proper angle for
doing SO. To quote further
We can see at once all the applica'
tions of such d system. One station can
talk to another without .bothering any
third station or being bothered by it.
In the second place. a coast station may
by signaling to a boat supplied with or
binary wireless teegraphic apparatus
determine its direction and inform the
boat of it, Two coast stations would give
the boats position as exactly as TWO
lighthouses would. Thus the Bou-
logne station was able to follow exactly
the progress of warship emitting pc
riodically wireless signal, and the route
indicated on chart conceded exactly
with that recorded on the vessel itself
This is most interesting from military
point of view, since we may thus dis
cover the situation of an eneny's vessel
or fleet as soon as it begins to operate
its wireless apparatus, even hundreds OF
miles away.
again. if the ships themselves are pro-
vided with Bellini-Tosi apparatus they
can find their positions relatively to
coast stations of the ordinary type, and
so proceed in a fog as easily as in clear
weather by the aid of lighthouses. Fur
ther as they can keep tab on each others
positions they can avoid collisions. Elk
periments made on the boats of the Com
pagnie Transatlantic have been unpreced-
entedly successful. These vessels
have been able to make land at New
York with the same facility as by using
the coast lighthouses. So the company
has decided to develop the use of these
devices and to install them on all it's
boats SThese discoveries constitute
,sdsfbtfess the most remarkable recent de.
yelopment Of wireless telegraphy. Pa j9a