The Bridgeport evening farmer. [volume] (Bridgeport, Conn.) 1866-1917, 1913-10-30
DUPLEX WIRELESS
NOW TO IRELAND
Messages Sent and Received at
the Same Time by Pair of
Nova Scotia Stations.
INTERFERENCE OVERCOME
Two Operators in the Same
Room Can Handle the In
coming. and Outgoing
Dispatches.
INTERFERENCE OVERCOME

This week has seen the trebling of
the capacity for. sending and receiving
wireless messages across the Atlantic
with the opening of the Marconi Wire
less Telegraph Company's receiving
station at LouSburg, Nova Scotia,
which works in conjunction with the
transmitting station at Glace Bay The
two stations are separated by about
ten miles. They will operate with the
station at Clifden, Ireland, and the
new receiving station: at Leterfrack,
On the estate of the Duke of Manches-
ter : These stations are seven miles
apart.
BY this new system it is possible for
an operator to ask to have a word re-
peated or some point cleared up with
out breaking in on the transmitting
operator on the other side Of the
world. By the new duplexing the
sending and receiving can be carried
on at the same time and at "a greater
speed and with a maximum of result
and a, minimum of time and labor,
while the chances for mistakes are les
sened.
The wireless operator of not so many
years ago would have said that it was
an in1possibility for one man to re-
eeivey while another man sitting in an
other part of the same room was send
ing each without disturbing the other
or causing an aerial collision of cleo
tricaI impulses But this is what has
been accomplished.
G. H. Taylor of the Marconi wireless
Telegraph Company explained yester-
day that this duplexing was accom-
p1ished by separating the receiving
and the transmitting stations, the dis
lance depending upon the power of the
latter station and the height of masts.
The stations are located so that the
energy from the transmitting station
has minimum impulsing effect on
the receiving aerial This is obtained
by the use of Correctional aeria1s, an
invention of Mr. Marconi, at both sta
TONS
Mr. Marconi discovered that an
aerial shaped like an. inverted j. has a
greater radiating efficiency along the
line of the horizontal portion and, also,
is most effectively Used as a receiver
of radiated energy when the horizontal
portion points toward the distant
transmitting station.
To neutraIize the effect of the nearby
sending station, a, second aerial is put
up near the receiving station, and the
main receiving circuit is left free for
the incoming impulses from the dis
tant transmission sta ton.
The operator who is receiving from
the distant station is seated in the
same room with the one who is oper-
ating the corresponding transmission
station, yet there is no confusion be-
cause the waves liberated for trans
| mission do not reach the receiving
aerial.
The receiving instrument sounds into
a photograph or dictograph and the
sounds are reproduced upon wax
cylinder It is taken to a reproducing
machine and copied upon the type
writer by operator who then has a
lasting record of the message. In high
speed sending the operators use ma
chine fitted with a keyboard like an
ordinary Typewriter. This punches OUT
| upon a tape the dots and dashes of the
| message.
AS high as rs words a, minute can be
sent or received by wireless by this
| system.
A new pair of stations for sending
and receiving transatlantic MESA ges
| are being erected at Belmar and New
Brunswick, N. J. They will be forty
miles apart and will CORRESPOND to two
| stations being built in Wales. The