Omaha daily bee., 1914-06-28
WIRELESS PHONES SUCCESS
Tests Are Made from Fast Moving
Train ia station Fifty
Miles Awny.

AWhys
While the eastbound Lackawanna Linn
tied OF the Delaware. Lackawanna g.
Western Railroad company was speeding
over the fifty-three miles between Scran-
ton and stroudsburg. Pa. May 1. c. ".
Logwood, engineer of the De Forest En-
gineering company. sat insa little COM
partment on the train and talked easily
with Telephone Engineer Graf Of the
Lackawanna company. who was sitting in
the wireless operators room In the rail-
road station at Scranton.
The train did not stop between scran-
ton and Stroudsburg and It's speed was
fifty miles or over an hour. When scran-
ton was ten miles behind II. Mr.. Logwood
put the wireless receivers to his ears.
pushed a little plug here, pulled a little
lever there. and began to talk.
Hello. hello.' he said. and In a mo-
ment he heard an answering, Hello,
hello, who are your
'Togwood, on board the Lackawanna
Limited train ten miles east Of Scranton.
Who are your" he replied
Graf. in the Lackawanna station at
Scranton" came the answer.
From then until the train pulled into
Stroudsburg the two men talked without
interruption.
This was the first successful trial of
wireless telephoning between a moving
train and a fixed station, and everything
worked without a single hitch. The De
Forset amplifler. an invention Of Lee De
Forest, was used and made possible
ampliflcation OF speech fifty times above
normal. The wireless telephony is a de-
velopment Of wireless telegraphy between
a moving train and a fixed station,
which the Lackawanna perfected and put
into practical use several months ago.
The officials OF the railroad company
were enthusiastic. william H. Truesdale.
president of the company. who has backed
L. b. Foley. superintendent OF telegraph,
in all his wireless experiments, said that
in his opinion wireless telephony had
passed from the experimental into the
development stage with perfection in
in sight. Mr.. Foley was delighted. but is
not ready to stop with what has been
done He is going ahead for even better
things.
wireless telephony between a moving
train and a fixed station he said, lis an
accomplished fact. We proved that this
afternoon. But we are going to prove
more. Further tests will be made to de-
termine the greatest distance over which
communication can be carried on by wire
less telephone. I can't say how much the
talking distance between a moving train
and a fixed station can be increased, all
though there Is no doubt that II will be
increased materially, but / believe wire
less telephone conversations between
fixed stations 800 miles apart win be a
matter OF easy accomplishment The De
Forest amplifier win make this possible
''The advantages OF wireless telephony
over wireless telegraphy are easy to see
For one thing there Is no necessity for
having q trained telegraph operator on
board trains or in stations as any one
can talk and hear over a phone. Even II
the talking distance between a moving
train and a fixed station Is not materially
increased above the fifty mile radius at
talned yesterday, wireless telephony from
moving trains can be put into practical
operative and commercial use. With
fixed stations 100 miles apart. a train will
never be out Of communication with one
OF them. which viii be In communication
with ell the otherA"
The Laokawanna's first wireless tele-
phone tests were made several weeks ago.
but had 10 be abandoned April II because
their message intsrfered with messages
OF the Navy department sent to ana from
the battleships In the Atlantic. The
wave length OF the transmission serials
used by the railroad was changed and in
tho tests yesterday there was no inter-
ference with government or other mes