The Ordway new era., 1919-02-21
A PERFECT WIRELESS TELEPHONE IS
AMERICAS GREATEST WAR SECRET

eTdi InuneuNeTs, IOTInlnE TlSnt Hueh
and left lines. breaking on In differ
ent directions and swinging back Into
line again. Everything was done with
perfect precision.
Colonel Culver explained that Major
Rossell was giving every order BY
word of mouth and that every man In
the fleet was getting orders at the ex-
act instant.
'Now If you want to you can stand
here on the ground and hear Major
Rossell give these orders, and you can
ut the same time that you hear them
see them carried out" said Colonel
Culver.
He led us to n small shack from the
roof of which dwarf aerials project
ed. put receivers over our ears, and
moment later heard a strong voice
say:
by the right flank" Then there
was second of hesitation. followed by
n stentorian, long drawp-Out Co." and
away off In the eastern heavens 1 saw
the long line of small dots swing of
to the right. and for the moment, out
of sight. And those words came from
Major Rossell, spoken in an ordinary
tone, 6.OOO feet in the air and fully
five miles from where l was standing.
And / was Informed that 1t would
have been just the same II he had
been further away. However. the
range of the new wireless telephone
Is one of the secrets that the division
of military aerpnautics is not reveal
Ing just now.
For more than an hour 1 heard
Major Rossell put his squadron
through a drill and at the same time
that heard his orders I saw them
executed. These things took place
while these 10 airplanes were rushing
along at more than a hundred miles
an hour at an altitude ranging from
1000 to 5000 feet. and with the man
giving the order fully two miles from
the nearest of his men.
The apparatus used for wireless
telephoning is so simple and SO COM
pact that one would never notice,
either the transmitting or receiving
devices on an airplane unless his at
tentlon was called to 1t. With the
consent of General Kenly, Colonel
Culver gave me great deal of in
formation about these devices and the
facts are the first published
about what perhaps is the greatest
invention of the war.
Description Of Device.
The transmitting set consists of a
power plant. a set box, transmitter
or microphone and an antenna sys-
tenn. The power plant consists Of a
generator driven on the windmill prin-
ciple by the passage Of the airplane
through the air. 1t is placed some
where in the open. usually on the rum
ming gear or on one of the wings, and
Its tiny propeller blade whirls vigor-
ously as the airplane travels along.
The so-called set box receives the
power from the generator, converts 1t
and places 1t on the aerials in the
form of sustained or undamped waves.
The voice entering the transmitter
wires, which are connected US In the
ordinary telephone. In the set box
the variations received from the trans
mitter, are converted and act to effect
a modulation of the continuous or un-
waves already referred to.
The antenna system consists of an
aerial of one or two trailing wires Of
15O feet in length,
strung out from the wing tips. This
is counterpoised by the wires and 9TH
er metallic parts of the airplanes all
bonded together. These two elements
of the antenna system are analogous
to large overhead wires and to the
ground" of land wireless station.
The receiving set consists of a re-
ceiving set box. a head receiver. q
source of power and an antenna sys-
tenn. The latter is the same as the
antenna system In the transmitting
set. The source of power is small
storage battery. The head receiver is
built into the aviator's helmet in such
n manner as to exclude sounds from
the motor reaching the pilots ear and
with his hearing. The set
box proper contains apparatus quite
similar to the receiving apparatus of
a first-class wireless station. How
ever 1t possesses number OF refine
ments over these which increase the
of incoming signals. with
stand vibration and minimize weight.