New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1894-02-04

,bor tho coil IS driven away. Both attraction ana
-.,,,l.lon are go timed ~ to give motion 10 '"e
revolving armailrr in ~" same '''"''''"' "
time fhe other magnet on IN" o'h'r soc VI u"'
machine ls cooperating in similar manner me
r,,aturo bv the way. is ring. not solid usually
,,,, , H., # min lrol plates insulated from
zach other often perforated t. allow v"ntIatlon
and hound into one hy The 'nclrclinf COTS.
rb. nrlucrl. which Mr. Tesla uses In his poly
phase motor is quit" different In hS Slm''S'
,rr, his orrnaturc is % mere bar or plate OF mag
nctic iron like \ In our second diagram mo"h'ei
-, , e,indl. Ga, as {, rotate His 'n"ld or force,
instead of being stationary ~ made 10 90 AROUND
In = circle DRAGGING the arinatur" hi"hH nv IL goes
TN. field mngnc's do not actinIlF move however
,, , in e,ch a manner rs 10 keep the centre Of
attraction shifting progressively. In t"o-ph"se
motor for instance tho current from me dynamo +"
,l,,.il.I Ga "a 10 come in and 60 ont FIRST by one
route which is designated as u in our diagram ana
thou fv another. marked 9. The magnets y an" T.
are included in tn" first circuit anu "'c S'''H'-
,a,D,,eIy .u.rriz~I: and then. Will" IN" wnve-ike
nnulse IS ~ubsdinS another comes III pF 'nc
,.cuI circuit ana acts upon the other pair 81 mag
,,s Let ~. suppose that at starting the current
first comes in by the route Il, AMI makes 'he emu u
- facing the ccuis" of our circle = hor'" PD..'
and the corresponding end 81 J. SCUM P'''' we
viii also suppose mat IN" arina'rr" mas S"h,'
,napoetl, prcdispo-iiiOn Of its own "hch ''"p'"
the end that Is uprcrmost in our diagram TO seek
,,r,, ,oi ,.h.r.vcr il can ind one. NJ the outset
,h., n ,,,u he. drawn to H. Will" T. VIII summary
attract the other end. If. now Inc '"''"-
info the circuit &. and makes mort" Po'' ."
IN. .rma;Ur. will feel two attrhchohS' anu '"'"e
-, 40 to b. half way between those h"sn'T' '''
,h, ,.,ve in f. is dying out. and mat III u i'sR'
o. ,h, ,h. latter magnet l. soon IN supreme con
,, and IN. ,ruaturr moves To a position al "
rieh, anrl. wIihIis first on" Me'h''i"'' " ia"
south" polarity. and attracts inc o'"'' '"' " W.
armaturr when IN, current NEXT "'"' VIZ -
sol "A
wires AT f. It's direction has b''h rr'c'''"' " "
49,. .al,.ruail,g" current. 80 mat u i S""'
-, am, J.. IL "a north pole. Hence T. co"N"S the
,,o,.,uarl,,I end OF the armature al hIs' par "
.he way and then all OF III" way 'i" -,
have secured half a rotation Inc o'"e' ' " ~
~ -, ,h came general method; ana the arm
.,ur. IL soon spinning at great spe'"' - VIZ
MAS motor Of this pattern there "'' '.N -,
instead 81 four; anu "''''
cults instead Of two. .,,.. ,,,
AFR Tesla found after a little tha' ''' w
would retain II polarity as wen as " ~ ,
, c,scl 10 slice of the sides Of his arma'ure
az no did al first. lie ana nus i"''a'o'' ' ~
" -, ,,odincations OF form for the held mag
" ,u retoining the principle OF moving 'he
| co., ro,rd in a circle. In itS Ih''st io'" VIC
.o,,ure ls a cylinder. not u'SN' d" ~" '
J heavy conner wire are dls''"u''' ""' -
| ne"'' 'p'' od 70 intensity the magnetism OF the
iron inside ,,,s t,oepIous inventor dis
IL wa NO. ,,.. wires would do the work OF four
| Cor = two-phase motor IL Se'",e' ~
| h,,.. tvy, separate ones '"' '''r'S '",
! nave wv ,eturn currents The three-p phase
"'' also At present. operated by three wires
mo- ,,hic, are made to carry the three sets OF
! wv" W ,.os since no two circuits are In ful
'n",,cs -, .,nce Mr.. Tesla has even devised way
| ,,rol ,yays in fact-by whI'h the TWO 'or '"'e'
..uts may be separa'eu' MOI d' '"e "S ""''''
cur NO .a,es them but close to the motor; SO
whio" latter may II desirable. be used on an
that '',' ,,,o-y,Ire circuit 1t has been ntmated.
by the four"r@ f., sy's% ,.0ara,oo
one Va - -, tho motor Is a transformer. or In
on ''r coil Ths piece OF apparatus consists OF TWO