The New Orleans daily Democrat. [volume] (New Orleans, La.) 1877-1880, 1879-12-05
Edison Proposes to Display Ills
Invention on Christmas Eve.
How tie Long Sought Subdivision u
Said To Have Been AC-
complished.
Meplo Park To DO Illuminated, and thu
Curious To Be Invited To Go and
v Sec What They Gan See,
New York sun ]


festiyals next month not enc will command
suoh universal attention ns TINT which ID 10
be held IN Monlo Park. N. J. Then ia prom
saea that long looked for achievement Of
aoIencc. the economical subdivision of the
electric light. On Christmas eyo the
"Wisard of Mnno Park" Thomas A. Edi
son. will illuminate all tho buildings IN the
modest little hamlet IN which ha lives and
works To that end wires have been run from
house Ia house. md connected thence with
hls laboratory The Illumination will be
hy maans of what might he called electric
let's but which, moro properly speaking. nre
email epiras of platinum ahd iridium ~
atata III "Reminiscences In n vacuum. The
dynano-clertrl0 machines, whence the current
III generated, arc already aot ~ IN tho labor
atnry One Of thaae. having power If forty
horses, will generate Ruilietent electricity Tor
tBO liuhte eaeh Of lG ennde power which is
the measurement of electric internally. That
In To say tho extraordinary phenomenon may
be aepn on Christmas day IN Menlu lark 81
electric lights toned down 20 The intensity 81
gas Jets IN frw days Mr. Edison will be
pin tho task Of alliSing the leta. 80 called
,ipou the gaze burners IN tho several houses.
Instead uf running the wrha that aia TO-
transmit the current through tho gaE pipea.
aH A. Ia ha intention TO ITO shortly IN this city.
for this occasion ho will my tho wirea along
the pipes.
" shall seud invitations far md wide.
aaia MIR Ediaan last W"d"adaY, IN order
that all may 500 that what has hocn cenEd
arrl "a vIaiunnry and impossible has h"an
accomplished. The thing IS dome | have
protected II IN this country and every ennad-
cradle country IN Europe lhat IA To say
there are only lew nniinportalt patta 81
Europe yet remaining uncovered, and theao
will lie 10 before the advDnt ~ tho holidays
You ask me II can epmprte with cathureted
hydrogen gaa lot tie Eae companies ~
tIrtlI for
II II well known they cnn stll DO this anl
make money, and oan underanll them and
then make II large profit
The mcthnds aud steps by which Mr. Ed
Eon claims ~ have accomplished the under
taking that had ita inception IN the electric
shops tn Anaonia, Conn. II now for the first
time made public.
Whnn MI Eliann received from Anaona
the Wallace dynamo-elpetriG machine. OF tho
talpmaphpn aR Mi Wallace calls II, he at
once began hia experiments. Tho amount 81
mower ha recovered IN the aerond machine
was SO incommenRurate with the original
power applied to thetirat machine, and trans
mitted by "A WIRE that both machines were
cast aaitn Then Mr. Ellison eSperlmented
upon the Gramuc. the Brush and tho Sic
mems mnChiupH. Ihese were better, hut Httll
the loss OF power was excessive. MT Edison
Mt once left tho beaten track upon which
aoantiate have been toiling for years with
unvarying results and struck out into fields
altogether new Instead Of exciting the field
magnet by the current from tho armatufe,
AIR Edison charges the field magnet by means
of a separate machine The batteries OF these
generators ain charged by means nf y Faradio
machine. 1t does not require moro than u
minute TO charge the immnusa magnets. The
internal resistance III tho armattre Ia only :
ohm
Mr. FdIson's now generator differs essen
TALLY from tho aramme. Sismnna, hruah ant
Wallace machines Tho field magnets are
about IA inches high. and weigh loco pounda
The magnet corea arc of wrought iron, lhoy
are u inches III diameter and ~ inches Tong
They are mounted on heavy caet Iron blocks
TO-. Inches high and inches wide. hnd ar'
connected ut the top by n wrought iron YOKE
q inches high and inehca wide. The cores
are wound with three layers OF No. 10 cotton
covered wire, tho ends 81 wh'ch are oonhael"'
with binding posts on the base OF tho machtn"
The two hlurkR upon which the cores Iost, as
we'll "a tho bearings Of the armRturo ar'
supported by IL cross shaped htass casting.
The armature revolving In cylindrical
snaee between thu pnlea III the fold magnet
enI,aata of n wooden cylinder mounted on Z
lis.inch shaft and having attached to its and
soft Iron plates between which arc aeverh
layers or M 20 aoft iron wirC wound eircum
ferentially Outside the iron dIalsa there AZ,
yulcaniged fihrc disks having their periphe
rice notchod t. receive the acternl coils Of ~
sulated wire wound lnngthwlse on the cylin
der and connected with copper bars nt Tn
rnmmutatur cylinder. Tho field magnet Il
charged hy the aid af u Rcpnrato machine.
Thua. ~ II mny 10 aeon. Mi. Edison bega'
nj tha foundation. AT first he hoped TINT TIN
machines already In tho market would u
lnast furnish him with sufficient power, an,
he so expressed hmaeli al tho tmr, tSis
hone proved iallacioua. Tho loss Ut power
was nltogcthcr toe great f"t economy II
hia new machine Mr. Ellison eaya he rrcnvor
o. per cont In his second machine ni IN
power applied to tho FIRST
After completing his dynamo machine. MI
Edison began to work upon hts electro meter
for without some kind ~ measure he coul
.lf ,Njti "a ih ann
exnended nj amy ono point This was 500
done For nearly eight months II" haa he"
experimenting upon the little gnntiivhnc
that II e. furnish the light. first II wa
made to consist Of q small platinum spilf
without covering. This would not do. ht
cause after the current has hcen withdraw
oxidation 70 n greater or less degree set II
Then he made composition, with lime as
base ard with this he covered the Rptra
1t was transparent, but had deTcPta FINAL
no hit upon the cXpcdieut w completed
covering tho platinum with small glas
globe filled with oxygen ANA. Tho gioh
being air tight, there could OF course he y
combustion. Ihis gave tho inventor greH
satisfaction, hut atill he Experimental, m
found that the gas was unnecessary an
troublesome In charging. and he rejected !
but retained the scaled Al0he. lhen cam
the difficulty OF preventing the intensity ,
she current from fustng the platinum I'M
problem. which has troubled electricians evG
since the first experiments In this direction
was met. A solution WAS found after KrH
labor ahd almost innumerahe experiment
by All Ingenious device. 1t Is we'll known The
the fusng point IF platinum Is greater tina
that az any other metal. That Il to say,
the Temperature he raised about Il scrit
of metals. each piece Of which Is
the same size. tho platinum will &
last: but heavy piece Of brass. 4
instance. will stand greater heat than
pece Of platinum oue-twenteth its size lh
knowledge was made use Of by Mr.. Ediso
III each globe he places block Of bras
When the current Is intensified 10 such m .
cent AZ u imperl the existence of the spir
IA a brass block Immediately unierneat
expanded by the heat pressess upon u lev,
which connects the shunt 'e" with the ma
line "hb." Now, platinum Offering great I
sistance to the current. and copper, Of wht(
the shunt Sc Is made, Offering very little r
sistance a certain portion Of the current Is
once diverted from the spiral, passes alor
the wire ID b. on the circuit. and Is thus pr
vented from accommodating