HAR



Crane, wheel-work of, 204
Crank, and connecting rod, 42

— analysis of motion of, 45-8

— throw of, 4S

— contrivance for doubling throw of, 141

— same by.wheelwork, 216

— expanding, 263

— variable, rotation of, 100
Cranks, two, with link, 110-27

— one oscillating, 113

— applied in wool combing, 118

— and in ventilating machine, 119

— and in sewing machine, 120

— and in shearing machine, 121

— and in Stanhope levers, 123

— ratiltiple rotating, 115-16

— example of, 247
Crown wheel, 21

escapement, 59

Curvature, circle of, 171
Cycloid, definition of, 180
Cylindrical gauges, 279



DEAD points, 149
Difference gauges, 280
Differential pulley, for carriages, by Sax
ton, 217

— screw, 218

— pulley, by Weston, 221

— motion, for cotton spinning, 236-40
Disc and roller, 309

applied for continuous indicator,

310
Drilling machine, principle of, 249
Drill spindle, motion of, 249

example of, 250

by Bodmer, 252

by Sir J. Whitworth, 256

Driver, meaning of term, 20



"P CCENTRIC circle, properties of, 49
^-^ Eccentric, throw of, 50

— construction in steam engine, 51

— example of, 52

— use of in drilling machines, 53

— equivalent for crank and connecting
rod, 50

— same for crank and infinite link, 54

— example of, 55

End measure, standard bars, 283

conversion into line measure, 275

machine for, by Sir J. Whitworth,

276
Epicloid, definition of, 173
Epicyclic train, 222
theory of, 224



Epicyclic train,for straight Unemotion, 229

model to illustrate, 230

for astronomical models, 231

with bevel wheels, 232

in spinning machinery, 233

for slow motion, 240

compared with ordinary train, 242

in rope-making, 24s

in Cordelier, 243-8

Equation clock, 243
Escapement, simple form, 58

— crown wheel, 59

— anchor, 62

— vrith recoil, 62

— dead beat, 66

— examples of recoil, 68

— pin wheel, 68

— chronometer, 293-5

— detached lever, 296

— horizontal, by Graham, 297



FEATHERING paddle wheel, 117
Feed motion, 155

of rifling machine, 155-6

by Sir J. 