This progression continues for a
quarter-revolution until coil becomes
45 neutral and coil produces its maximum
current.
From what has now been given the opera
tion this apparatus will readily under
stood. cylindrical other armature
containing the independent coils G'. They
io are permanently magnetized and opposite
polarity. Between the
poles there mounted, iii bearingsin the cross
pieces G", cylindrical iron core, which, 70
in order prevent the formation eddying
currents, and the loss consequent thereon, is
subdivided the usual way.
The same principle operation may ap-
55 plied motors various forms, and have
shown one such modified forms Figs. the
15 field force the other the neutral point. and that con- 100
centrated and powerful field obtained and
a remarkably powerful tendency rotation
in the armature secured.
The particular advantage the construc
tion illustrated Figs. Four wires connect the
motor-terminals and with the brushes and
20 g', respectively. Thus currents are induced iu
the closed circuits the core, which, energiz
ing the core strongly, maintain powerful at- 95
traction between the same and the field,which
causes rotation the armature the direc
tion which the resultant poles are shifted. These magnetic cores or
63 poles are wound with insulated coils (7, tlie
diametrically-opposite coils being connected
together series and their free ends brought
to terminals respectively. the binding-posts are connected
the proper circuits from the generator cause go
a progressive shifting the resultant mag
netic poles produced the magnets upon
the armature. For instance, the
armature-coils,or those which the currents 120
are set induction,may held stationary
and the alternating currents from the genera
tor conducted through the rotating inducing
or field coils means suitable sliding con
tacts.
and the drawings. these figures, M'
are field-magnets secured forming part
of frame, mounted base, These
60 magnets should laminated composed of
a number electrically-insulated magnetic
sections, prevent the circulation induced
currents and render them capable rapid
magnetic changes. 3. E', which are insu
lated from each other. The same results
may obtained the form illustrated iu
Figs.
In the ease motors wound withindepend- 13c
eut field and armature circuits and operated
by shifting their poles, described said
I
. Insulated con
ductors coils are applied the cylinder D
longitudinally, and for these may employ 75
copper plates E', which are secured the
sides and ends the cylindrical core well-
known ways. advantageous also
to slot these plates longitudinally, prevent
the formation eddy currents and waste 85
energy. 115
Obviously the principle this invention is
capable many modified applications,most of
which follow matter course from the
constructions described. also apparent that the induced 125
coils may movable and the magnetic parts
of the motor stationary; but have illustrated
these modifications fully the application to
which reference lias herein been made.202,279
2
\
tive positions. The
35 current from the coil G', being conveyed to
the terminals and through coils O', has
a tendency establish poles right angles
to those set the coils but owing
to the greater effect the current coils 0
40 the result merely advance the xroles
from the position which they would remain
if due the magnetizing influence coils C
C alone. are the poles pole-pieces
of alternating-current generator. the drawings two 80
of such circuits areshown, formed respectively
by the conductors and.
The coils terminate the two pairs of
insulated collecting-rings/and/',upon which
bear the brushes g'. The action described then re
peated, the poles having been shifted through
one-half the field,or half-revolution. These plates conductors may
form one preferably several independent
circuits around the core. This results even and
perfect action the apparatus.
In Fig. These
coils are wound right angles, that while
one crossing the strongest portion of.
By the further rotation the generator the
coil brought within the influence the
30 field and begins produce current, which
grows stronger the said coil approaches
the maximum points the field, while the
current produced the coil diminishes as
the said coil recedes from those points. When the generator ro
tated, the coil Gwill the certain point shown
in the drawings be" generating its maximum
current, while coil neutral.
When these motors are not loaded, but run
ning free, the rotation ofthe armature nearly
synchronous with the rotation the poles of
the field, and under these circumstances very nc;
little current perceptible the coils E';
but load added the speed tends di
minish and the currents coils are aug
mented, that the rotary effort increased
proportionately. and however, forming polar pro- 105
jections the field and armature cores. The
second half revolution accomplished a
50 similar way, the same polarity being main
tained the shifting poles the movement
of the generator -coils alternately through
fields opposite polarity. Let as
sumed that this current conveyed from the
25 rings/ the terminals and through the
coils Its effect will establish poles
in the ring midway between the two coils.
In order that the system whole may be
better understood, shall now describe the
5 mode plan devised for producing the
currents that effect the progressive shifting of
the poles the motor
