The Pleasantville press. (Pleasantville, N.J.) 1912-1929, 1923-02-03
NJ Belin has made use of in devils
Ing what he calls his "Anti-C apteur,"

ing what he calls his "Anti-Capteur,
Shlch literally translated, means Anti
5apturer." that is to say. the or..Gn
which prevents interlopeis from cat II
ing from the air What was not In
eided for them.
This an%ti-capteur is what regulates
the periodic revolutions of the eylin-
G As l have said, the revolutions
must never vary in sleed. but the fac
ions of a second which are interposed
hetA cen the revolutions may vary. Ihe
anti-eapteT consists of six disks upon
an axle, about 1-3 of IA millimeter apart.
Each disk has the figures from y TO U
upon its circumference, those on The
most right hand disk s%ignifying units;
those on the next, tens, Il so on
ill those on the most left hand disk
correspond to hundreds of thousands
Tie disks work together and controI
the speed of the cylinder by mechan
SIN into which it is unnecessary to
enter. This. however, is how the thing
works:
A unit of time, say one beat of the
electric chronometer. corresponding to
~ e second of time. is selected as the
desired speed of revolution.
Revolutions Are Measured.
The axle of the anti-capteur and
illat of the synchronizer make one
revolution in the unit of time, but the
axis of the cylinder makes a revolu-
ton in a small fraction of a secon
less than the unit of time. This
which is called the utilized time,
caves a fraction of IA second, which
is called a lag" The lag may be
between the start of the unit of time
and the start of the utilized time, or it
may be between the end of the utilized
time and the end of the unit of time,
or both.
Let us say the unit of time is one
second. The cylinder revolyes in two
thirds of a second, leaving one-thlrd
of each second rs the lag. h
one-third of a second ma be dis
tributed at will. always remembering
that the two-thirds OF D second used
IN each revolution must be used Ill
each second. Ii is this distribution
Of the lag which the six numbered
disks control.
1t does not make any difference as
TO the length of the intervals be-
tween revolutions. These always be
lin simultaneously AT the sending and
receiving stations. this synchronism
being automatically regulated by the
starting Of the sending cylinder. This
insures the perfect alignment, without
which all words would be utter CON
iusion.
PARASITES" Added P%recautlon.
NJ. Belin, however. has provided an
additional precaution against a mes
sag being caught by some clever radio
sharp. He has imagined that an eX-
pert at radiotelephony might have an
ear so acute as 10 be able to listen
to the sending of "A dispatch, detect
the intervals and 50 reconstruct tho
message. To obviate the possibility o.
such wonderful detective work h
makes the machine automatically sent
throughout the intervals what ever,
Fadio sharp knows rs parasites" The
erect of this would be to d%isconcert
any ~listener-in, for he would hear moth
ing but a b-r-r-r-r-r-r. which would pre-
vent him from hearing any interval.
at all.
| have not attempted to describe the
details of the apparatus which doe
these marvels. 1t is too intricate It
explain to any but an expert it is
however, quite simple to one who III
derstands electrical machinery.
1t is evident that the actual use O
his secret apparatus must be limited
but one can readily understand condi.
lions under which it would be invalu
able. In wartime, for example, Of
for conversations between a nations
foreign office and its ambassadors
abroad or for a big bank n its cor
respondents in distant cities. Nor
could an enemy or the police tap the
wires or listen in under any circum-
stances. One European nation has al
ready ordered the apparatus to be in
stalled in its state department and its
embassy in an important foreign cap
ital.
This latest of Edouard Belin's in
ventions was hailed with respectful
enthusiasm by the European press
when it was prematurely announced
Il few weeks ago through some re-
marks made by Marconi. The London
Times devoted a leading editorial to
it. The cryptic makes practical just
what every wireless expert in the
world has been longing and hoping to
ocbfavo