The Wheeling daily register. [volume] (Wheeling, W. Va.) 1864-1878, 1877-07-19
ANOTHER TELEPHONE.
A New Invention which Beats All It's
Predecessors.

Philadelphia Times, July IL.
Over hundred invited guests witness
ed private exhibition OF the edison, .
newly-invented telephone in the audi
torium of the Main Exhibition building,
last evening. By means of the intru-
mcnt vocal and instrumental music per-
formed at the Central Station WAS trans
united to the auditorium, where it was
reproduced in q louder tone than the
original. The invention is called "EdI-
sons electro photograph telephone" and
differs fundamentally from any instru.
ment of the kind which has yet appear
ed before the public. The transmitting
apparatus consists simply of a long tube,
having one end covered with thin sheet
brass diaphragm, kept tight by n stretch
ing ring ard having soldered in the
centre thin disk of platinum, i'm
mediately in front OF which is an
adjustable pstinum-polnted screw
hxedto rigid pillar. To trar $
init the music it Is only necessary to hum,
sing or play into the open end of this
tube, which action causes the diaphragm
to vIbrate The platinum points meet.
ing n circuit Is formed, and the electric
current transmits every viberation over
the wire To the receiving end.
The receiving or reproducing sppa
rstus is based upon An original discovery
made by Mr. Edison about five years
ago, winch WAS that when a piece OF
paper, mois:ened with certain chemical
solutions is laid upon metallic plate con-
nected with the positive pole OF n battery
and II platinum-iaCed wire connected
with the negative pole of the battery j.,
drawn over the paper, the passage of the
current through it reYders the solution
o eaglnCus, and the wire slides freely
over the paper; but when the current Is
interrupted the normal friction OF the
paper returns, and the wire slides over II
with difficulty This principle is ap
piled 70 the receiver-a sounding board
and drum or wheel having tlsnges on
both sides. Over the drum, which Is rO-
tated BY hnnd-crank, passes II cOntlnu-
ons strip of paper, and pressing tightly
upon it and the wheel is u smooth plsti-
mum point at the end of n spring, Sc
cured To the centre of the sounding
board The current from the battery
passes to the spring, thence to the p'atl-
mum point, thence through the moist
paper to the drum, and thence back to
the battery. When the drum is turned
the paper passes forward, and the normal
friction between the point and the paper
gives forward motion to the spring al-
so, which draws out one side OF the
sounding board. If now wave OF cur
rent passes through the paper the trlc-
ton disappears and the spring not being
pulled the resonatOr regaIns It's normal
position This takes place NJ each vi
bra:ion By mems OF this friction the
feeb!est current which would not have
any appreclabie effect upon an electro
magnet, eXerts extraordinary strength.
Stretched on the sounding board are
eight wires, forming the gamut. Any OF
these wires will vibrate when the re-
CURED number OF vibrations per second
are made by the sounding board. For
instance: Middle Z Is hard when two
hundred and titty-six vibration are made
per second. The instrument is extreme
IL sensitive, reproduCes the highest note
and Overcomes in great degree the dit
iculty experienced in the use OF electro
magnets, whose slowness OF operation Is
due TO the time required Tor the magne'
tiZstion aud dema gnetlZatlOn OF the iron
cores and the production OF secondary
currents