In the transmission of news, market reports, etc., as a continuous
process a long strip of paper of typewritten copy is put into this
machine, and the blacks and whites of the letters and figures falling on
the light sensitive cell open and close a C. W. broadcast or wire
circuit; which at distant points is translated back into light and
recorded on a long strip of photographic paper.
This can be a continuous process if the sending strip is added too from
time to time, and the receiving photographic strip of paper, as it is
exposed, passes continuously through a developing, fixing, washing and
drying bath. This process might be required by the conditions of
service. A white strip and an electric pen may be used instead of photo
paper.
In the sending machine the rotating prisms sweep the image of the
typewriter line across the light sensitive cell; and the strip is moved
longitudinally by winding on a drum.
In the receiving machine the strip is drawn along while it is curved
around a rotating cylinder inside which the modulating light is located,
turned off and on by radio. A corona glow lamp is preferably employed
with the photographic paper.
[Illustration: [Photographs]]