Pueblo chieftain., 1921-04-20
WRITING BY WIRELESS
BY Frederic j. Haskin.

BY Frederic ]. Haskin.
Washington, u. c.. April IA writ
ten message transmitted 1000 miles
instantancously without wire or cable
is the latest fad OF wireless telegfaphy
This wireless writing machine. which
will make II possible for a man in the
~ilds OF Alaska to capture tho news OF
the world in written form by merely
setting a trap for it. so to speak, and
by which'an explorer might locate mis-
position on the face OF tho earth by
wireless. within 80 feet of exact. is the
invention of two Eovcrnmcnt scientists
in tho Bureau OF Standa rds. Another
government department. the Coast and
Geodctic Survey. expects TO save by
the use of ii this summer. three times
as much as IL cost to perfect the in
vention and make two of the machines.
The whole achievement is ono more
illustration OF the value OF scientific
ments. which gets such scanty support.
The machine itself simple look
ing affair which weighs about %
pounds, exclusive OF the two stora &c
batteries and the metal ehronograph
drum. is tho result of research work
by Dr.. T.. \. Eckhsrdt and Or. J. G..
karcher. Small in size. light in weight
and easy to operate, 1t offcrs solution
to many OF the vcxinE problems now
existing in radio operation.
UT 'A"frpits inc present tNsH
tom OF listening for the dots and
dashes with telephone receiver. two.
three or moro sending stations may.
by sending signals out simultaneously.
mix their messages In the ether. and
jam the air" The man at the rccciv-
Ing end. listening for ono particular
message. must adjust his apparatus to
tune" TO n wave length as nearly as
possible equal TO that Of tho sender
whom he wishes to catch. Tho other
scndcrs seriously interfere and often
cause the receiver to lose or garblc
parts of the message. This new invcn-
ton goes long way toward climinat-
ing that dYficulty.
The machine was designed to meet
the need OF an autoEraphic wireless
the expensive strinsinE OF wires to
places remote from telegraph lines and
TO eliminate tho lag due to reception
by car. and recording OF a signal by
hand.
How II Work.
Tho recording is done roughly in the
following manner. according to tho
scni-techniCal explanation OF the in
ycntorS
Adjustment is made on a condenser
for the particular wave length desired
to be caught As the signals sent out
arc Snthcrcd in by the antcnna. which
can be strung on any HIGHT poles
reaching about 10 feet above tho
ground. oscillations are started in a
local circuit. thru an "clcctron tube.
This local circuit derives its power
from an ordinary storage battery
such as those used in self-starfcrs for
| automobiles. The starting of these
oscilla ations releases enough direct cur
rcnt energy from tho batteries to opcr-
ate n small relay, or magnet set In
some respects like the magnets in an
ordinary electric door bell but capable
nj deltTn to nd m
This relay, or magnet set, make. and
| breaks power in another circuit de-
rived from second storage battery.
This second circuit operates another
magnet set. to which tho STYLUS Is at
| tachcd
Tho stylus In tho present apparatus
| IN an ordinary fountain pen. II Ia In
\ contact with n revolving drum which
has sheet of paper placed on it Tho
dots and dashcs arc recorded rs humps
in tho otherwise straight line. Short
humps indicate dots, and long ones
| dashcr.
| Tho action can he readily likencd "a
that of machine gun which must he
cooked each time before It is fired
| which action takes place automotically
gun and pushes back tho hammer
| ready to nrc again. 50 to speak. As
long az the circuit stays closed tho
hammer" STAYS back. Rut when the
| CIRCUIT IL nfpkrrs corresponding fr
pressing tho trigger. then tho second.
ary circnit is closed and tho hammer
or stylus goes on its way to mako a
mark
Tho action of the mechanism II worry
much more selectivo than the rocciv.
ing action now In usc II absolutely
eliminates any chance Of tho message
being garbled by wavo lengths oven
closely approximating those which 1,
wishes to Gethcr and record.
| Permanent Record
| Tho record thus made on paper Il
permanent, and the message can he
/ deciphered at leisure. In a recent test
| signals sont out from Lyons, France
1000 miles away. were caught in tho
heart of the residential district of
! Washington. and transferred to "A rec-
ord which even person unskillcd in
tho Morse code could readily iranslat..
| Tho machine that morning had heer
in tho Bureau of Standards few miles
away. In the afternoon 1T was install