Albuquerque morning journal. [volume] (Albuquerque, N.M.) 1903-1926, 1915-05-25
Eight Messages OUer
Single Wire Latest
Western Union Stunt

The Western Union News carries
the following account OF the installa-
ton for commercial use. after exten-
sive tests, of devices on eight trunk
lines in the east whereby messages
can be transmitted over the same
wire at the same time, each message
being printed on q blank ready for
delivery at the receiving end:
During the month of May the
Western Union Telegraph company
viii begin the installation OF It's null
tipleX printing telegraph system on
twenty-five circuits comprising the
important trunk lines indicated on the
accompanying chart This system Is
the result Of development and engl-
neering york covering a period of sew
eral years, during which time the
equipment for a complete circuit was
Manufactured and given q service test
under close observation For the past
eighteen months the system has been
operated on direct circuit between
New York and Boston. during which
period II has carried greater vol
ume Of traffic than any other COM
mercial telegraph circuit in the world.
For about three weeks during this
over other lines through a repeater
to make total length Of $50 miles,
80 that operation under different con-
ditions could be observed.
This system is arranged for quad
ripple duplex operation, that Is, TO give
-four transmissions aud receptions in
each direction over one wire. The
speed Of each transmission has becu
a L. a IftlA la In.
tween twenty-five and fifty words per
minute. This range of speed has been
provided TO take care of variable cir
cult conditions, For the past six
months the system has been operat-
ing at forty-tive words per minute per
the four transmasions
IN each direction giving total circuit
output of G60 words per minute.
The general principle involves the
use of two Simultaneously rotating dis
trlbutofs, acting To connect Co the
line four automatic transmittors and
printers At each station. the line time
being assigned Go the trunsmtters ana
printers IN sequence.
Messages arc prepared in perforat
I'd tape form for transmission. The
lapc thus prepared Is inserted in an
automatic transmitter which through
he distributor transmits the signals (
10 the line. The signals at the recelv- (
ng end are translated by means OF
'eluys aud u printer into Roman char /
,ctcrs, thus preparing the messages In /
'orm for delivery.
"As the system has been arranged. .
'lght operators are required at each I
nd OF the circuit four for preparing 1
he messages for transmission and 1
our as printer attendants.
I'm addition TO obtaining a printed /
ecord Of the receiving message
leviec known as the receiving perfor-
tor has been arranged for attach
ncnt to he printer so that perforated
ecord Of the message may also be OBJ
aimed with this device, relay mess
ages are automatically prepared for
transmission. thus eliminating the
Iccesstty Tor manual repreparation of
message Tor transmission on another
lrouit.
While the system has been arr
anged for quadruple duplex opera
ion, provisions have also been made
o that two or three sendngs In each
ERECTION may hc secured thereby pro-
idng a flcxhiiIty that viii meet most
lrcuIt requirements"