The Washington times., 1922-09-08
h0TIONP|CTURE
RADIO FORECAST
ORIGINATOR.
c. r. Jenkins Sees Day DaW- :
ing When World Events Will
Be Flashed Through Air. ,

own home may De expecteu III 'he
near future, C. Francis Jenkins in
ventor Of radio.photography, de-
clared here, H,tLi ~ .
AS music is already brought into
the home by radio. Mr., Jenkins pre-
diction indicates that the movie the
ater is threatened with interesting
competition, particularly on bad
The washington inventor said
that, motion pictures differ from
ordinary lantern, slides principally
only In speed of presentation: Then
all we need 10 do to get motion pic
lures by radio is to speed up our
present processes SO that we can
send and receive sixteen pictures per
second instead of one minute, and
90 the thing Is done.
r.. Therefore,. photographs by radio
being an accomplished fact, In order
to get notion pictures by radio, the
only problem remaining for solution
is speed And as light. which makes
up our motion picture, Is mponder-
able and has a speed OF lsS'ooo miles
per second, it is obvious that the
permissible latitude is many thou
sand.fold the necessities of the prob!
lem involved.
Reasonable Development.
Motion pictures by radio seem,
therefore, well within reasonable ex-
pectation of early accomplishment.
However, the development of motion
pictures by radio for the home VIII
not be undertaken until the news
picture by radio is well established In
useful service. a.-.@4
xatnfnH ont that In
the use OF photography. ''as we are
transmitting pictures from a flat
surface we need only TO remove
the picture and let the lens Hook
directly at the object itself-a man,
q house, or a mountain-and the
reproduction at all the receiving
stations will be a man, house,
or q mountain. This feature is per
haps one Of the greatest values
of the system.
,".The ultimate wide installation
Of broadcasting stations for pic
lures should help also to discourage
forgery, embezzlement, robbery.
murder. and the like, because a
suspect could be placed in front
OF a broadcasting machine and his
image appear in every police sta
ton in the country equipped with
u bulCdDl6 TeCtlNlHS lHoIE uiIlCtlI.
These instruments should also
have great tactical value, for not
only could the army and navy send
secret messages, maps, etc, by the
new instruments, which cannot be
deciphered by the unauthorized,
but a great battle on land or sea
could be watched from the. offices
of the chiefs in command at Wash
lukIOHs ...af.. ~
"But It is in the home that the
widest usefulness wi1 ultimately
come. for by sending out music
on, one wave length and pictures
on another, an entire opera may
be enjoyed through both tho ear
and the eye, as all the family, old
and young, listen in and look On
amid the comforts of their own
home.
the farmhouse with photoplays and
the opera without the hindrance of
muddy roads or snow blockades.
making farm life more attractive
to- the country--bred boy and girl"
Here, IN non-technical language.
Is the inventors explanation OF the
radio-photograph, which he de-
scribes as a moving mosaic picture:
How 1t Is Done,
"It is done entirely with auto
matte machinery; that is, a. machine
in our sending station covers the
whole picture in lines beginning at
the lefthand edge and at the upper
corner, and going across from left
to right in successive adjacent paral.
lei lines until the whole picture is
covered.
Every part Of the picture then
reflects it's particular strength Of
light onto a light-sensitive cell.
Selenium is the old standby for such
work, but the cells We use seem
preferable as they are much more
responsive.
."This light-sensitive cell is in an
electric circuit, the current flow of
which fluctuates as the resistance
of the cell changes with the different
strengths of light impinging upon
It,, This fluctuating or modulated
electric current is then impressed
upon a radio broadcasting set
directly or after being amplified
through one or two tubes, the modu-
lated picture wave being impressed
on the radio carrier wave"
Mr.. Jenkins said that "one OF the
Verts the light values into sound
values, which are actually put
through the ordinary carbon trans
an ordinary telephone. can't say
one that works very satisfactorily.
1t enables us to telephone a picture
to NOF (Anacostia Naval Air Sta
Al