New-York daily tribune., 1866-04-07
Electricity as N nsotor-Jsr. stuarcs Elee.
tric Engine.

Yesterday afternoon number of gentlemen
interested ia mechanics and scientific subjects met ia
the lectureroom Of the Free Academy, to exa5nine
new motor recently invented by Mr. L. G. Stewart Of
this city, 1t is an apparatus designed to ajpply the
mower of electro magnetism TO the productio1 Of mo-
tjon in other words an electric engine adapfed to the
same uses the ordinary steamengne mp appara-
OF Mr.. Stewart though readily compreleEded upon
insuectiou is rather difficult TO describe without dia
grams or models II consists principally OF two eylin-
ders OF ron or other metal placed one wthn the other
and having common axis. The inner cylinder revolyes
mon shaft which rests in bearings attached to the
heads OF the external cylinders Around the Internal
periphery of the cylinder and the external PERI
nbery of the inner one placed series OF electro
magnets arranged in alternately 20 that the re.
yoying of the inner cylinder aiternaey iorms anu
breaks a complete electric communication. Ihese
eectro.magnet3 connected TO battery OF the re-
onisite mower to produce whatever effect may be
wanted But the electric current does nor pass utecly
TO the magnets but through an ingenious arfehgemens
attached TO the exterior Of the largergnder by which
the current is passed alternately IL either direction
through the enyeoping coils OF wire thus reversing ns
action Of the magnets These recurring chauges oA
direction are made with more QUICK
ness This governing apparatus IS 1t may be called.
is fastened to loose head attached 10 the outer cyn-
der and by slightly turning this lead' WIN sne nana.
the motion Of all the currents Is checkeu OF re-
messed so that the entire power OF tue apparatus
may be instantly applied to stoPs motion OF 70 urn
in an opposite direction lnietion Is as eonp'u'e ,n 2
uuder the control OF the operator rs ns VI 'ho 's
perfectly constructed locomotive
MIR Stewart does not claim that he has as vet per-
feet machine. The construction OF the one when was
exhibited was, in many respects. faulty ana tne CIR
oumstanoes were unfayora for any test OF ts capa-
biites Two things however, were plainly mani-
fested-First, that considerable amount OF power was
developed in the form Of continuous aud steady
rotary motion and secondly that this power was per-
| fectly under the control of tho opere'or
The relative cost OF power obtained by TINS appar-
atus as compared with that OF steam, oanEot as
| vet be estimated. Professor Doremus OF tho
| free Academy. who gave some very interesting
and illustrations Of tie power OF electricity
nreyious TO the explanation of NJ Stewars apparatus
thinks that with suitable apparatus electric powep
NAV be produced chesper thai steam power ASIDE
from the question there Ge other manifest adyan-
tages ON the side Of electricity II constantly end in
simultaneously ready for usi 1t produces neither
smoke flame, nor no1oas gaes; Is per,eS.if eleany
is noisesss shord Mr.. Sgwart succeed in perfeetng
his apparatus, it night be dvantSgeousy substituted
for horse power in the opulsson OF our street cars.
and in fact for nearly all vehicles In the city. Es-
ncciay ON srbterransei road such Is proposed in
his oiiv IL woud be nyuahe being liable TO none or
,he oectops nrred against other OF propulsion
We ,3der,,, and tha, Ne Stewart intends to make
r,hiic trial of his apparatus upon Of our city
| railroads, which We ier'ehtiy nope may pfo'0 e"N
eessful one