Evening capital journal. (Salem, Or.) 1888-1893, 1892-08-04
a81Esszff1lgMHS 81 fg;MS
PICTURES BY TELEGRAPH.
An Invention which VIII BE Found
Useful at National Conventions

An Trxert,on which VIII BE Found
Useful at National Conventions.
Among the most recent uses to which
electricity has been applied is that OF
transmitting photographs and drawings
by wire.
The process is founded upon the use
Of electricity of varying degrees OF
strength, as in the telephone or, in other
words, the movement of certain lever
at one end Of the line causes CORE
spending lever to take the same motion
at the other end, similar to the telegraph
KEY. The telephone is affected by vary
ing sound waves; the instrument de-
scribod is affected by the varying de-
grees of light.
Tho process is as follows: A picture
is tsken on a film composed OF gelatine
and bichromate of potassium, or the
picture may be taken in the ordinary
manner. and transferred to the sensi-
tive stripping film from the negative.
The film is then exposed to lukewarm
water. The portions which have not
been exposed TO the light are washed
away. while the other paris are left.
For example, the dark parts of photo
graph represent the portion of film in
relief after washing and tha light parts
the parts washed away. tt finn there
fore has parts in relief, While other
parts are partially or entirely removed.
The film is now stripped from the
glass and placed upon drum similar TO
that used in the photograph. Bearing
upon the cylinder is a medic or tracing
point. The cylinder is set in motion
and the needle travels over the surface,
or rather the surface travels under the
needle. The needle or stylus rises aud
falls az the varying degrees of elevation
in the film pass under 1t, and by so do
ing the amount Of electric current trans
mitted to the receiving instrument is
regulated.
The entire success of the machine de-
pends upon the possibility of varying
the current as the elevations and depres-
sions vary in the film. This is attained
by means Of lever which ii attached to
the stylus or needle, which in turn
actuates series of levers having plati-
nun points. AS the stylus is raised a
greater or less degree the number of
levers depressed is increased or lessened.
The receiving instrument is identical
with the transmitting machine, except
that craving tool is substituted for the
stylus on the transmitter. The cylinder
of the receiver is covered with wax,
which is turned down smooth.
The needle of the transIIitter, as it
meets low point in the film, presses
upon number Of levers, and u degree
of current is sent over the wire which
SO affects the magnet of the receiver
that the craving point cuts deep mark,
and vice versa. The needle having
travelled the full length of the picture,
it is removed from the cylinder and
carefully cut, spread out flat, and the
picture appears in lines Of different
depth.
The inventor claims to be able to re-
produce photos on papier mache that
may be used directly for printing. The
arrangement is such that by change of
gears reproductions Of different sizes
may be made. Hand sketches may also
be sent in half tone. The inventor also
claims that the depth Of reproduction
can bo increased 100 per cent. above the
greatest depth of the ordinary half tone
sketches. Electricity.