The “Belinograph” is the invention of Edouard Belin, of Paris. With
these machines “the first step in transmitting a picture is to convert
the latter into a bas-relief. Or a drawing can be made in a special ink,
which, when dry, leaves the lines in relief. The picture when ready for
transmission has an uneven surface, the irregularities of which
correspond with the pictorial details. The transmitter resembles the
cylinder of a phonograph. The picture is wrapped around this metal
cylinder, and a style presses down on the picture cylinder as it is
rotated by clockwork. As the style moves up and down over the
irregularities of the picture, a microphone varies the strength of an
electric transmitting current.
“At the receiving end another cylinder in a light-tight box carries a
sensitized paper upon which a point of light is reflected from the
mirror of a galvanometer actuated by the incoming current from the
distant station.”
Two very accurately regulated chronometers are employed to keep the
machines in synchronism, one chronometer for the sending machine and one
for the distant receiving machine. (_From Review of Reviews_, 1922.)
[Illustration: [Photographs]]