, 1879-05-15
EDISON,
What tho E.ondpn Times sor. ,,
l"tont Tor Elcctrlo L'shtlno '' i'''

1....r. " s.. ,,, tl'ncs snys Ahout III.
L"ndon 7tnss, Ap.,, ",
Mr. Edison's patcus for. clcrt,,, u-,.
whie|, has boon 30 anxiously exnec,cd limiting,
fsterGd In the London Patent.Of,lc. ~, W W"' reg
uasi u ou1 It does not, upon Tho tacs =,
u, appear ,at oil likely to lead tn |' ,sa u
socetv - revolution IN The ast 10 uh,"5 %5
IL refers. 1t may broadly bo sad 10 con,aa ",I,'
nothing newin principle, anu to ,lcpcul cntt,s n,a
both Tor Its valuc aNd It's validity upon 5' I'm ~
tails OF application Of fac,s Which h,va ,a ue-
bcon known'to cvosy practical eIcctrIcisn lug
includes au improved generator n, ~ ~
production Of The electric eur,ent NJ .'as "'s
the light Is furnIshcd by t,c ,,aa "4l'
aescehce OF p!cco Of material Of vrnss.s
resistance introduced Into tlle ctrcuit Wv saer
copper wire Of certain ealbro Ia condu.,,ssa
electric current anl Is Interrupted lv ,ho ~ sa
duction Of portion pf platinum vtrc ~ n''a' ,an's
ancr than tho copper, tho platinum ,,r usa ~
Increased resistance, causes the cnuvo,.,' .a
Of part Of the electric current Tn,o ssoa haa.
and the platinum becomes rgd.hot mr. ,h,.'1
not. rs tllu enso nay bu. 'fhis nrn,oa.s m"'.e'
has been utilized In The arts foy tnanv avps.s! sn
posea III spseefS' a. means of applying Id
light !lIe gas Of the upperost circle u ,n,. ",, 10
and 10 many other places antl wayt, f.,
same princplo forms iEr basis Of Mr rd,,auaa'oo uao
ilsnt, In Which, of coursc, The ljcht.rsu;n.,,
nody, Whatever it nny lie, has 10 be r,I,ei
sueoat 81 f 4auanRun ,SRean'F' rs @ 0er t. !i
says: "a cylinder Of plattna ioil, aro"na
rod OF line, gives mn excellent lirhf api
strips, wires, rods, beads, Att pieces Of i,jlm IN"
rnth1nlum,, rhediiiu, oe'niuta, tltantum. an;
othe5 e metals % TINT 1usc at high tcnperaturs s
used. such as oxitloof tilanifn.' it,s tilien't, i,
to believe that there th here any valid patent y,
that tile public ran be restrained from heatIea
known substances by tho employment nj !
f6hlilnr method. ~
Tile practical difficulty to bo overcome. In n.
application Of incandescence to illumination ~. !.
thu liability OF tho 'ncaud escncc, at INV u,u,en.
to reach the po!nt Of fusion OF tic Jtoht s,rin,
body, and thus TO destroy tho essential part u
The apparatus. III order to oby!ute tIIIs. II,
s;.n",1,,, E.!son 30 arratngcs matters t!mt tbs
dangerous point. by ca,lslns tho exp,n.
aIon uf Il tlietallc bar. completes 8 new eicstd,
connection, nnll thus opgns shorter mn, le,,
resisting circuit, intu which portion ot tIe
current Is shuntcil, s0 tint tic amount suffered
70 rcaeh w. la'np - rcduec'l III corrrapou4ing
degree, Here, again, VIC hare principle which
ls iD daily nec for other purposes. Nj. Sroeno.
letti's RAILWAY signal humps Indicate tIler own
accidental extinction by the brel:ijug Of a ri;.
cuit which ts held closed by ,'v warmth
Which they nlford while lighted; nM
Of a circuit BY metallic expansion produced hr
elevation Of temperature. There ts, ,bere.
fore, nothing nuw III tin conception, Ent onlr
In It's apnlteattDsl fur tho particular ptlrpo,e;
tiId Mr.. Edison has sought to :ratcst ltal,rl}
by describing II lnrgc nataber Of different
mechanical COhtrtvniCes for earring It tuto
eiFect. Eycu II It be assumed lllat he ran
rnsinta!n patent for llnau eoutrlyauerr
which Ia vers doubtful, It Ia amoat rertaln that
other methods ot obtaining thu anne result Will
slggest themselves tn 0itur cxperiuentcta
Moreover, as wns sot forth I, letter IRON Nsr
tint Mt. Edlson's contr!yances 10 ,lot net With
sufficient pronlptItuhe. md lIlat ais incs.,dts.
cent material is liable to bu lusel IN
spite VI them. Il still more formidable
oolectlgn woule prolaoly prise from ths tast
hsaktng strong electric current are toup3 tn
exercise very Aurtfuf effect upon tbs snuru
from which tho currclt IL tlesivel aa1 thus tu
strlks Mt tho root Ut It's durability an eeono'y
The gonGrator colsists Ut ut, app'Ianeu llksa
aud having cacll ot Its nrlns connected with
cotls, md maintained In vibration BY q gss
or stcatn. .et,giuc. Tho patent includes
description OF m electric snc,re, in
wlsich the electricity supolel 70
any building, ts measured by ile pas.asc p o.
PHtl'cA VI ttaS SuAICHt kHstutiA y" W.
coll containing solution of copper. slc!allic
copper is deposited upon ono Of the tSo blatcs
III thu coll during the passaGo OF tle cutTcht'
nnl in quantity proportional to Its intraslly'fo
tsnt, by removing atltl weighing this plate .:
Suited Intervals, all estimate D( thc a1l'tInt ot
electricity consumed eau be arrived nj. lEe
specification concludes with tho following ftase'
tient Ut claittlR:
claim ~ tho combination With an electric l:hl
OF ftrMal circuit reVHiatUr TO ess"n ihe cltsls'e
Actlon In thu light when thu mdIimlM INTENSITY
hns bscn altulned; t.> tho cambtnatthn With ~
electric light Of ctfcni cloang leSct npeFaleip1
heat fttm the electric current Or from The l1Rhttla
shnnt Ur shurt circuit 10 divert thu current Vt
portion thereof from thu ltght; ~ thu foM.
G!natlpn With ll!u ttc!Fc li4ht VI Ctfratt-cle'!
oper1tcd by heat n!h serving to place inDto olf,
sca!Bthnce In tho circuit Ut tho electro htht' 81
tho combination Ut Tho e1uctttc llsht win ~.
phraKsn operated ny t!e expansion ot Sa5 o aa.a
III proportion to thu Temperature ot tlIe Ivy. ~
regulate thu electric cutruni; to- Tue cotplna'oa
with vibrating ludy, similar to tunlaalo'h.
mechanism fur maintaining the s!tfIlion, s hMs
navne.l, coils, nnl hclIccs, whereby seeond.1{
current IL sut up, 10 u to CONVERT Mccnan,sa as
fnutton Into electrtc I1fcs OF tho 1efefte " tM ~
cunhihntt0n with clcctrac lights. tabsah's1i.n ~.
yueil M described, 0t ,aeanA Tor scsNiatias ~
eectr}c current 10 The saHu IN proportion w. ,s ~,
hunt evolved In tho Hight, NO III to ptu'sa1 'Hlai
to the oppnrat1s.
In tho prcscnre nf a specification which eaaN ,': o.
thus summed NJ. It scri,s toeray ctriase ,",s ,a1s
The prourIeiors u Eas siarta NAV p'ssess .s. H."
s0uls In lIrucp, mud tlt he general lillsnaaas"
Ut electric lighting must b. deferred ntlt,' 'o'l'
tuore aolid progress has been ,lrcu1nF!abea'
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