ACCELERATION, 146

-

equation for, 156

curve, graphic construction of,
162

Acceleration curves:

Baltimore and Ohio Railroad,
213

Buffalo and Niagara Falls Elec-
tric Railway, 202, 204
Chicago Metropolitan Elevated
Railroad, 254

City and South London Railway,
167

Liverpool Overhead Railway, 197
Accumulators, reversal of generator
charging, 38

Armature, parallel connected, 6
series connected, 6
Armature reaction: .

reduction of M due to, 267, 276
equations for, 263, 264
influence of, on the speed, 66
in arc-light generator, 18

Clearance between motor and the
ground, 59, 238

Clutch, use of, in starting, 157
Commutation, condition of spark-
less, 279

Commutator, 7, 283,
Compound winding, 65
Conductors, surface:
force on, 1

to count the number of, 7
to determine the number of, in
designing, 278

Horse-power, rating by, 169
Hysteresis, energy expended in, 27
influence on torque curves, 103
retardation due to, 29

to find the loss occasioned by,
130

INDUCTION Curve, definition of, 17
of motors used on:

Baltimore and Ohio Railroad, 128
Buffalo and Niagara Falls Elec-
tric Railway, 100
Chicago Metropolitan Elevated
Railway, 251

City and South London Railway,
161

Induction factor defined, 6

found by measuring the
torque, 8

found by observing induced
tension, 14

limiting conditions in equa-
tion for, 51

effect of armature reaction
on, 18, 267, 276

JERK in starting railway motor,
197, 201

KINETIC energy of rotating shaft,
157

of moving train, 244, 257, 258

LIFT, acceleration of, 158, 172, 225
belt-driven, 159
efficiency of, 143

equation giving M for, 52, 54
conditions of motion of, 35
use of worm gearing in, 58
Liverpool Overhead Railway:
acceleration curve, 197
motors used on, 171, 198
use of roller bearings on, 216
Load, definition of, 28

distribution of, between two
coupled motors, 81, 106

curve defined, 11

experiment to find, 259
of motor and generator com-
pared, 264

of railway motor, 270
distortion of, by reaction, 276
- effect of asymmetry of, 282
Magnetism, residual, 102
Magnets, shunt-wound, 60
series-wound, 94

reversal of current in, 37
use of steel in, 102, 111
Maxwell, Professor Clerk, on the
distinction between heat and
work, 25

Meter, current, 68

Moment of inertia, 157, 158
Motion, uniform, definition of, 30
reversal of, 34, 37, 97
Motor, Crocker-Wheeler, 130
Edison, 10

G. E. 800:

acceleration curves, 202, 203
induction curve, 100
speed and tension, 118
Westinghouse, 141

railway, dimensions of, 269
Motor-cars, best velocity ratio and
diameter of driving wheel, 215,
223

NEUTRAL points, 11

Nice Central Lighting Station, test
of generator at, 88