Daily press and Dakotaian. [volume] (Yankton, Dakota Territory [S.D.]) 1875-1880, 1877-07-18
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Tae aeys saveas5on Is sAe Result of an
odd Diseorcry-

. AA@ aa- s&ea--IUH st%ea
The apraa sim
lF o5 8 long s1 sa1stve Inehes IN diana
st-r, hav-ng ne snG eare-ed With ! hin
sheez hr& 6apA KhG Is kss sight
by : stretching rIaE- n tie centre al ;k.e
2 Diaphragm Is liva.e5 Z hin disk 8.
p.4sS1A AID immediately IN i7or9 az this
aisk II al adjustable pIaanapne screw
secErd % . rigid pillar.
To transmit ihH llscs AaaIg necessary
% slag or pay into Inc open sni d III
sloa. This GEss the diaphragm 10 vib1zte
and. tAs plsanz 70 Ms meeting make the
c1Ecr1.t, 2a1 the electric current ;fan-8lts
every vibration ovez the wire q ihe recaiv-
ing sad.
The receiving apparatus emp0ye3 b7 Mr..
E4lsea fr reproducing the TONES Is based
upon IN original disc Try made b. him
sozae five years ago. I4s di-coyeFy was
tast whsH q picce Of papsr mois; ned wish
ctrtaln chemical solutions j. iai3 upcn q
metallic p!at= 1nueett3 Il lie po-it5ve pole
Of Z battery and : . HA-fa1a wiz cum
nected 70 the negative pole Il lie battery Is
drawn OYER the paper, The passage Of the
current through i causes all friction to dis
appear. and he pIatna.ac4i wire slides
over lhe paper as iron apoa ice, but If the
current re interrupted, this effect i~nstsntly
disappears, and the normal friction of the
paper causes the wires 10 be drawn over it
Fita difficulty This principle is applied 10
The receiver resonant box, a drum or
wheel having Ranges on both sides. This
wheel Is secured 10 q shaft rotated BIZ the
handle. 4 continuous strip Of paper from
the reel passes over the drum, the surface Of
whieh Is roughened. Resting upon the drum
Is q smooth platina point upon the end OF
{ tho sr.-svt ,rd.ch - eoa,-rG ~ .fo r-.x.-
the resonan. box, and presses the platina
point with considerable force upon the
chemically prepared paper. The current
from the battery passes to the spring, to the
platina point, thence through the moist
paper-whicb in this state is a conductor
thence TO the drum and back to the battery.
The operation is as follows: When the
handle Is turned the paper passes forward,
and the normal friction between the point
and the paper serves TO give a forward mo-
ton 10 the spring hence one side of the
resonant box is drawn out. II, now, a wave
OF current passes through the paper, all fric-
ton ceases, and the spring not being pulled,
the side OF the resonator regains It's normal
position and this takes place at each gibra-
ton. b. means OF this friction the most
feeble currents which wonld not produce the
slightest effect upon an electro-magnet, thus
exert extraordinary strength. This appara-
tus will respond and reproduce with great
power the highest notes Of the human voice,
which are nearly inaudible when magnets
are employed, the slowness of their opera
ton being due to the time required for the
magnetization and denlagnetization of the
iron cores and the production of secondary
currents, which delay the action and mu,i-
late the signals.
This description refers more especially to
the apparatus for the transmitting of the hui
man voice in tones or singing. The only
difference between this and the speaking
telegraph proper, however, is in the substi
tuition Of a plumbago point for the platina
point in the adjustable screw Of the trans
mitter. This again IS another original dis
covery of Mr.. Edision's, viz: that pIumbagd
changes It's electrical resistance with enorm-
! Gus rapidity under pressure, the effect in
4 this application being that when the dia.
t phragm is yibrated weakly contact is made
Y with the p%lulnbago point very lightly, and
Z the reslstsnce of the plumbago being bul
| slightly reduced, a weak current is sent Out
from the battery, and q weak effect produced
at the receiving station. When, however, a
r strong pressure Of the diaphragm is effected
by reason of the exerciseo of a more powerful
O. vibration of the voice, the resistance is very
+ greatly reduced, and a strong current passes
' to the line and a strong or loud effect is pro
duced at the receiving station Hence the
Y amount of power, with all It's fine gradationi
5 generated by the voice at the transmitting
station, is transmitted in its proportions tt
r the receiving instrument, and thus the fns
articulation of the voice is obtained. Thii
4 of itself is a wonderful invention, and vii
. be of great value to electricians in Other
8 fields. The ability to send from a battery
currents Of different strength autom a~tically i
r a new and valuable invention in electricity