Evening star., 1923-06-15

Continued from First Page)
Is even simpler in construction and
operation than his apparatus for send :
distance to which motion pictures
may be sent is limited only by the
sending capacity uf the radio equip
ment, proper, he explained, trans
oceanic and transcnntinental pro1ec-
ton being possible if radio stations
used for the picture transmission work
have sending sets of sufficient power.
Experts Watch Experiment.
The demonstration yesterday was
watched by Henry d. Hubbard. as
watched by Henry D. Hubbard, Prof
c. c. Dilier, George II. Vaneman, Paul
Henderson. jr., second assistant post
master general, and A. Crossley, radio
expert of the Navy Department.
The process. according TO Mr.. len
kins, is exceedingly simple" but TO
attempt TO explain it in nontechnical
language is difficult. Briefly, the in
ventor enEpha sized, his problem. after
perfecting radio still" pictures. was
to transmit these stills with enough
rapidity to produce the effect of mo-
tion, as is done in ordinary motion
pictures. A succession before the eye
of about sixteen pictures per second is
necessary in ordinary movies. Mr.
Jenkins new apparatus accompllshes
this speed.
Deyises New Lens.
The key to the, solution of this rapid
succession of pictures is peculiar new
optical shape in glass, known as the
"lens-faced prismauic ring" IN send
ing still pictures 1he inventor uses
plain prismatic rineS. the function of
which is TO move the illuminated image
which is to be transmitted across
photo-electric cell, Thus enabling the
changing of light vari atoms into radio
pulsations To complete the travelling
of all parts of this image across the
cell requires about six minutes.
In the new speed de vice each pic
ture is completed in about one-six-
teenth of second. This acceleration
was made possible by the addition to
the plain ring of a circle of small
lenses. which fash the Image across
the cell while the ring is travelling at
tL ousands of revolutions per minute
At the receiving end the radio
pulsations are picked u,p on the
customary radio receiving and ampli-
flying set. the varying radbo currents.
however, being made TO light d spe
stead of sounding in telephone re-
ceiver.
Process Is Reversed.
The fuctuating light from the lamp
IN turn is projected through second
prismatic ring, the exact duplicate of
the one at the sending end and re-
volving at the same speed, and the
image is thus again built up" just
as It was before being Sliced up"
across the sending cell
The new invention requires no pho
tographic equipment or processes of
any kind and involves no film what
ever. 1t actually sees" a moving OBJ
ject at the sending end and flashes
it forth on a screen at distant point
with no other medium than hertzian
waves.
BY the Jenkins device the Secretary
of War may sit in his Office during
wartime and view the progress of
battle far away it is claimed. Grand
opera may not only be broadcast in
music, but the whole family may sit
as they speak Through the radio
phone.
Hear President Speak.
Residents of the west coast may sit
in their favorite theeter during the
inaugural parade and watch the pro-
cession pass in front OF the White
House. The Presidents speech may
be broadcast simultaneously with his
movie closeup. Other DEVELOPMENTS
almost without end are predicted by
the inventor.
Mr.. jenkins said today1 he is ar
ranging a long stance transmission
test to satisfy government officials of
the complete practicability of his ap-
paratus The Navy already has do
mated it's radio facilities, formerly at
Anacostia, which are temporarily dis
abled by reason of their removal to
Blue Plains.