Evening star. [volume] (Washington, D.C.) 1854-1972, 1931-03-08
RADIO TYPEWRITER
LICENSES GRANTED
First Public Demonstration
of Machine Recalls Expert
mental Permits.

Demonstrations by Glen w. Watson,
Detroit inventor, Of a operated
typewriter called the Watsongraph, re-
called to Federal radio officials that sew
eral experimental wave-length licenses
have been issued looking to this devel-
opment and that one company has been
authorized to build q series of long
wave stations to put similar system
into practical operation this year.
The experimental licenses were issued
| to the Morkrum- Kleinschmidt Co. of
Chicago, makers of teletype machines,
| now commonly used in newspaper Of
fees, at airports, etc. Construction per-
mits for five long-wave stations for a
system invented by william H. G. Finch,
well known radio engineer. have been
issued to q Hearst radio news Subsid-
larry, for which Finch has been author
lied to install high-power stations in
New York, Chicago, Atlanta, Denver
and San Francisco.
The Hearst stations, according to
Finch, will distribute news by radio
telegraph, to be received on radio-oper-
ated tipping machines In newspaper Of
| fees within range. Finch said the first
of the stations win be in operation in
New York by July 1 and the second
| at CIuCaBO SuOIty LleEea4CeIs
Demonstrated Last Week.
The wireless typewriter invented by
| Watson, wherein a standard typewriter
keyboard supplants the Morse key and
an automatic recording typewriter re-
places the head phones of the wireless
operator, was given its first public DEM
onstration in Detroit last week The
following statement about 1t comes from
knnUrVN
| perimenter:
Excepting that the transmitting me-
dunn Is the same electric wave that car
rieS our broadcast programs instead Of
q wire, the device Is closely comparable
| to the thousands of Geographic type
writer's in daily service throughout the
country. The widespread adoption Of
this earlier invention, a familiar sight
IN almost every large ONCE. Is indicative
of the possibilities OF the wireless modifi-
cation. AS Is pointed out by engineers,
its application Is limited only by the
noise characteristics of the radio cir
cults involved and the closeness with
which the adjacent radio typewriter
channels may be grouped. Radiated
and induced noise conditions, such as
| exist today in the average ONCE, are Of
. nature to interfere seriously with the
reception Of sh0rt-wave impulses as will
Such noises are electrical and are
caused by fans, elevators, water coolers,
addressing machines and other familiar
equipment. Their existence will neces-
sarily affect reception, which depends
on the accurate response to definite Sc
quence of impulses each second. Ex-
traneous impulses, or interference, re-
suit in the misspelling Of words.
Can Operate Accurately.
However. it is expected that the de-
velopment of the stenode radiostat cir
cults for short-wave receivers, with the
stenode characteristic of reduced back
ground noise, will permit the use of the
radio typewriter In the average Office
with an accuracy quite comparable to
that of the wired typewriter. At the
same time, the Selectivity Of the quartz
crystal stenode circuit will make pos
sible the employment Of radio type
writer channels less than 100 cycles
apart without 'croSs-spelling.'