Evening star. [volume] (Washington, D.C.) 1854-1972, 1929-11-09
TELEWS|ON TEST
PROVES SUCCESS
Chicagoans Claim Develop
ment Is Almost Ready to
Be Placed in Homes.
BY MARTIN CODEL.

CHICAGO, November 9 CN.A.NA)-
Radio artists, who might easily be rec
ognized in the flesh, and symbols al
most as legible as the ticker tape quo
tations of stock markets were viewed
through "television eyes" at a private
demonstration given yesterday in North
Shore Hotel. The demonstration rep
resented the fruits of the experiments
of an earnest group of young engineers,
who confidently believe that their tele-
vision development is about ready to
emerge from the laboratory to go into
the home.
The full face of a blue songs singer
as he played guitar, the head of
girl singing popular selections to
piano accompaniment, a hand sketch
ing cartoons and cards bearing letters,
numbers and symbols we're thrown on
celluloid screen as the radio impulses
were received from a short-wave sta
ton 2 miles away. The voices and ac-
compartments were Synchronized per-
fectly to the movements of the images,
although they came from the broad
casting transmitter of station WHO,
several miles farther away.
Screen Determines Picture Size.
The images, falling In a pinkish glow
on the small screen, were seen at best
advantage when the witnesses sat about
IL feet away from the receiving set
which to all appearances was an ordt-
nary highboy radio cabinet. The screen
swung by gate before an aperture
from which the light emanated.
The size of the picture, which con-
sisted of As lines, was determined by the
position of the screen. The images of
clearest definition were about 6 by 6
inches, although the inventors say that
they have produced, eXperimentally
figures Is inches square. When full
length pictures were shown the figures
were not as clear and distinct, but all
their motions could be discerned There
were no disturbing blurs or fiickers in
any Of the pictures, but these were
more or less discernible. especially If
person sat at an angle to the screen.
The receiving cabinet was attached to
an ordinary electric sound-receiving set
OF late design. The technicians ex-
planned that certain parts of the re-
ceiver were changed to receive the sound
signals, so that the photo-electric cells
in the cabinet could translate them into
the pins Of light forming the full pic
ture.
Most receivers now being marketed
can be adapted for the television at
tachment without losing their available
qualities. the inventors said.
AT the studio the multiple spiral
scanning disk, with tiny pinholes and
revolving rapidly before a protector
lamp, was shown. The televiSion sub
Iect Is placed before the path of the
beam, the reflection is picked UP by
the photo-electric cells and the light
points go on the air as sound signals
to be picked up by the synchronized
apparatus at the receiving end.
Corporation Is Formed.
The television system is known as the
"Sanabria system" for its inventor,
Ulysses A. Sanabria a young Chicagoan
of Spanish descent, who entered the
radio engineering field by way of the
amateur ranks. He is chief engineer
of the Western Television Corporation,
formed to exploit the development.
electrical engineering at the University
of Illinois, is in charge of research and
development.
The system is the one that Capt. Guy
HILL acting chief engineer of the Fed
eral Radio Commission, came to Chi
cago to view last September. The claim
was then made, and it is made now,
that the broadcaSting of images is done
in a wave band of less than 10 kilo-
cycles, which is considerably less than
the number of channels required for
most, If not all other, television expert
ments. Only four of the receiving sets
have thus far been built
The inventors say the short waves
will carry their signals a radius of at
lease 20 miles without interference from
fading, static or other causes.