The farmer and mechanic. [volume] (Raleigh, N.C.) 18??-19??, 1914-09-01
SEE THINGS BY WIRE.
English Engineer Has Perfected
VDiuue Device.

English Engineer Has fefIectcu
Unique Device.
What the telephone has done in the
transmission Of sound is now equaled
by an interesting invention for the
transmission OF lgnt by wire, says the
New York Press. pac humiliation
by the wonders Of modern science
has been carried a step forward by
his latest scientific discovery of a
well-knoWn English scientist.
The new inVentiO enables the i'm
age of any object to be transmitted
and reproduced before the eyes Of a
spectator miles away, uSt as the tele-
phone transmits and ~reproduces the
tones OF the voice. OF course, for
some years scientists hav been able
to transmit photographs over a tele-
graph wire, but the cost is prOhibitiye
and the results not very practical.
DR.. NJ. A. Low, a London consult
ing engineer, is the inventor of the
Seeing-by-Wire machine. He is we'll
known in the English metropolis as
a thoroughly reliable scientist and was
engaged in laboratory research for
the British government. A number
of inventions stand to his credit, in
Guiding the low high pressure motor
and a high-pressure petrol engine.
The apparatus consists of a trans
mitter and a receiver connected by
wires. The transmitter consists essen
TALLY of a screen divided into a large
humble of small squares, each being
a selenium ''cell.' This screen is con-
tanned in a box, and in front Of it is
the lens. The arrangement is like
that in a camera with the screen TAX
ing the place of the Photographic
plate. The lens throws an image Of
an object before it upon the screen.
Different parts of this image vary in
light and shade, SO that the light fall
ing on the squares of the screen varies
in intensity.
These squares are brought into cleo
trical connection by wire the receiving
apparatus. AS the light falling on the
square varies, so do the electrical cur
rents vary. These currents actuate
electromagnetic which, in their turn
work shutters through which a light
shines. The amount of opening Of
the shutter depends on the strength Of
the current and, therefore, on the in
tensity Of the light falling on the cor
responding square Of the receiving
screen.
Thus a candle flame would give q
bright image on certain squares OF
! the screen and the corresponding
shutters in the receiver would open
widely, allowing light to pass through
2 freely. and a person looking through
I at the receiver would see an image
4 of the flame. If the flame were
moved, it's image would move acros:
/ the transmitting screen and CORE
f spending movement would be visible
S in the receiving screen. In practic,
s only the currents from one row o
e squares in the transmitting screen ar,
sent to the receiver at a time. Blu
S the currents from the different row
t are sent in exceedingly swift success
sion.
Therefore, actually only one row Q
squares in the receiving screen i
: Illuminated at a time. But the row
are illuminated in turn SO quickl,
n that to an observer it seems as if tn
G whole of the image on the receiving
S screen is seen at the same time. Thi
is really a Very clever electrical az
e %plicatiOn of the principle Of the kline
n m~atOgraph, i'll which a series of slight
n ly varying pictures blend into one a
e they are successfully flashed befor
& the eye.
n The system has been tested throug
d a resistance equivalent to a distanc
: Of our miles, but in the opinion c
DR.. Low there is no reason why
should not be equally effective owe
n far greater distances. In the trans
q hitting screen n may be re
lie placed by any diamagnetic materia
t. The cost of the apparatus is consi(
lie cradle. the conductive sections Of III
roller being made of platinum. d
e Low thinks that in so years poop
to will ook back with wonder at the day
when it was necessary to be at
lie persons side in order to see mir
to When this day arrives, consider no
is It Will change the conditions OF Wa
n fare.
n The Importance of keeping church
lO omen for nra yer at all hours OF I