The Washington herald., 1922-10-15
NEW SYSTEM SPEEDSRADIO
COMMUNICATION FOR PRESS
Greed Method Applicable for Commercial
Work at 180 Words Minute.

Radio code communications from
ships asd land stations. which ra-
diophone users frequently hear as
they tune-in the broadcasting con-
certs, are transmitted by hand. gem
orally at speed ranging from
twenty to thirty words a minute.
Since the early days of wireless va
>rious methods of automatically re-
cording messages at high speed
have been developed in order to IA
cilitate the clearing of heavy traff1c
in the shortest time possible. es-
pecially between long distant
points. The high-powsred trans-At-
lantic transmitters and receivers are
In constant operation, day and night,
handling the hundreds of radio
grams and press reports between
Enrope and the United States. To
use speed OF thirty or even forty
words minute would require many
hours to get the latest press news
and business messages across the
sea. One OF the lafest methods of
speeding up radio communication is
known as the Greed system. which
is applicable at the present time for
commercial work at a speed of $50
words a minute
Need of Accuracy.
One OF the greatest problems in
the operation Of printing or record
Ing radio apparatus is the necessity
of accuracy of the signal form; that
is. the duration Of the dots and
dashes. The accuracy required for
mechanical or automatic receiving
must be carried to a much higher
degree than IL the reception is
through headset and the human
ear. and more particularly so when
high telegraphic speeds are used.
For the operation of the high-speed
mechanism it is necessary to insert
a mechanical relay between the
value circuits. 4 relay in this case
is an instrument actuated by the
radio currents after they are am
plified to sufficient strength to cause
the relay to operate and control
other instruments in the circuit
The new relay used in connection
with the Greed system was deveI-
oped in England and has features
which Overcome many Of the dim
culties anc deficiencies existing In
mechanical relays. Its salient
points are: Stability of adjustment,
firmness OF contact pressure. and
absence OF rebound seasitivity,
shortness Of transit time and ability
to work at high speeds.
In Continental Code.
In connection with the Greed sys-
tenn the signals are transmitted in
the ordinary continental Morse code.
The impulses as picked up by the
antenna wires are passed through
special vacuum tube amplifiers.
which build up the signal strength
sufficiently to actuate the relay.
capable of following the dots and
dashes perfectly up to 200 words n
minu;e. with a current as low as
one-quarter milliampere. The relay
In turn operates a performer which
punches the dots and dashes on Il
paper tape This tape is run through
an automatic typewriter. which re-
cords the message in print on an
other tape. The new features Of this
relay are ability to follow at high
speed and at the same time work
with entire fidelity on such a feeble
current. The inertia of all the me-
chanlcal parts. as well as the cleo
trical magnetic circuits, have been
so finely calculated that the maxi
mum efficiency theoretically possible
is produced.
when Stats Is strong.
When the static or atmospheric
electricity is stronger than the sig
nal 1t takes preference over the dots
and dashes and interferes with tho
operation of the machine. But with
the advent of high-powered stations
there are many hours of the day
when signals are stronger than the
atmospheric disturbances. especially
in winter, and at such times the au-
tomato apparatus makes it possible
to copy the messages without the