Evening star. [volume] (Washington, D.C.) 1854-1972, 1928-08-18
CALDWELL MAKES
. TELEWS|ON REPORT
Commissioner Tells of Ire
mendous Strides in Trans
mission of Images by Air.
BY MARTIN CoDEL.

BY MARTIN CODED.
Fascinating experiments evidcncing
The tremendous strides recently taken in
the radio transmission and reception OF
images still and moving, furnish the
subject Of q report submitted TO the
Federal Radio Commission today by
Commissioner q. H Caldwell of New
York. ~vis,la) brosdcastlng" is the gen.
oral eptellation given by Caldwell 70 the
new art which has variouSly been called
rhotors6io television and radiovision,
Join rs other leaders In The radio
field. Commissioner Caldwell emissions
the CAV is not far distant when Wis
usi receivers" will be commonplace in
the average home. Already the art of
reprccucin2 photographs b. radio has
progressed 10 the point where many
krusdcsStlng stations regularly are
sending out still pictures on their stand
srd channels TO be received by special
sets now IN production.
However. the Jenkins radio photo
graphs, the Ranger photoradio and the
Cooley ravfoto among the better known
OF the Sliii-picture devices. seem 10 be
Rfvinc way in interest To the more IN
Jr:suinG development OF moving images
by radio.
In this connection TECHNOLOGY in the
visual "broadcaSting' field should be
explained, Misnomers in this art are
oecried by Dr. ], H. Deliinger. chief oil
the Bureau of Radio Standards, one
Of those who believe that the simuita-
necus transmission Of actual events by
- l~@
who cautions against too great eXpecta-
lions in the immediate future.
Dr.. Dellinger. declares that radio
scientists generally are agreed that the
word telsvision should apply only 10
moving images sent ana received by
radio.
Jenkins Experiments.
c Francis Jenkins, the pioneer
Washington inventor in the field of still
and moving images. suggests the adop-
ton OF .raciioviSion" as e term that
viii make this art as distinct TO the
public as & radiogram is now dlstln
from telegram.
jenkins experiments are those men
tened in CaldgellS report. The COM
missioner tells Of seeing jenkins sill
houette movies" OF full-length figures
black and white animated cartoons,
which The inventor is demonstrating
csilv at his laboratories here. Scores,
of amateurs have built the simple re-
ceiring set designed by jenkins by get
ting specifications that are furnished
gratis and reports are already coming
in OF the successful reception of the
images as far away as Chicago and
Montreal
jenkins is now building a transmit
ter which will broadcast motion pic
lures in half tones on the ll-kilocycls
band which he was recently licensed 10
utilize He has such confident expec-
fations that he proposes TO demonstrate
the results this Winter in Washington
movie house where pictures will be re-
ceived by radio and projected on the
screen
Commissioner Caldwell states that
three popular stations in his zone are
nov broadcasting the huZzes and whis-
ties that can be translated into teie-
vigion images with proper apparatus.
end many more throughout the colln-
Try are sending maps. diagrams and
pictures They are getting fairly sat
iSfactory results. even in the relatively
restricted limits of the ordinary broad
caEt bands 10 kiiocycles wide, he re-
ports.
Going to wider bands of transmits
sion such as 30 to 80 and sometimes
100 kiiocycles. Caldwell tells of the
experiments with the Alexanderson
teievision apparatus at Schenectady
Thsre he said he saw the features OF a
man and their motions clearly depicted
in 4-by-4-ineh scanning aperature, and
then saw the apparatus receive moving
images Of two men actually boxing,
wrestling and fencing under daylight
Illumination.
Conrad Projects Movies.
Abol,t 8 week ago another important
television experiment took place in the
Westinghouse plant at Pittsburgh where
Or Frank Conrad, sometimes called
the father Of broadcasting," has turned
his efforts to this new work. Pictures
sere sent by radio from motion pic
lure heels Caldwell calls this a
form of deferred television." and says
il gives greater clarity and effective
ness than ordinary television because
higher light irtensities are contr0llable
isy the intermediate finn element.
A. the Bell Telephone laboratories in
New York few weeks earlier con-
vincing experiment vas demonstrated
Of still another television apparatus
showing 9 tennis player in action in
ordinary sunlight.
i ne only real suggestion Oh early pro-
auction Of television apparatus for home
installation was made In connection
with the Westinghouse experiment with
motion picture films IL was definitely
stated then that the Radio Corporation
IF America, BY reason Of its patent and
production arrangement with Westing-
house would probably market the sci
soon. This heralds the probability OF
seeing motion picture plays at home
instead of going 10 the theateT.
Reduced 10 It's simplest, according K
Caldwell. ali television apparatus con-
iists merely OF scanning disk and ne0r
lamp or tube. The latter. changing ths
intensity Of light spots with lightning
rapidjiY 50 that they formulate quickl,
changing pictures. Is as mysterious anf
wonderful device as the vacuum tube
which MAKES sural brosdcasting ant
reception possible
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