None
PAGE Gearing, see Toothed Wheels. Graphite, as lubricant 209 Indicator mechanisms 42-46 Crosby 43-44 Tabor 42 Thompson 43 Involute gears 286-288, 289, 290, 293, 301, 306 Instantaneous center 10-12 Instantaneous motion 10 Jib-crane 357-368 Journals 181-209 Allowable bearing pressure 182-183 Calculation of, for strength 187-193 Crank-pin of engine 191 Cross-head pin of engine 192 General discussion of 181-182 Heating of 184-186 Lubrication of 195-196, 201-209 Main-journal of engine 188-190 Materials for, and bearings 186-187 Proportions of 186 Thrust 193-197 Tower's experiments on friction of 202-205 See also Roller- and Ball-bearings. Keys 148-157 Classification of 148 Cotters 156-157 Feathers 154-155 Kernoul and Barbour 152-153 Parallel 148 Roller ratchet 153 Round taper 155 Saddle, flat, and angle 152 Splines 154-155 Strength of 154 Taper 148-149 Woodruff 151-152 Lathe, bed 84 Supports 333-336 INDEX 385 Legs, see Supports. Lever-crank chain, location of centres 17 Velocity, diagram of 26 Linear velocity 22 Points in different links 26 Line-shafts 177-180 Linkage 14 .Lubrication, of roller- and ball-bearings 220 Of rotating surfaces 195-196, 201-209 Of sliding surfaces 166-169 Machine cycle 2 Machine frames, form dictated by stress 81-84 See also Frames. Machine funtion defined 2 Machine parts, forms of cast members 85-86 Proportions of 71-86 Main journal, design of 188-190 Mechanism, definition of 15 Location of centres in compound 19-22 Motion, chains 14-15 Constrained 4-8 Definition of r Free 4 Helical 9 Instantaneous 10-13 Kinds of, in machines 8-9 Plane 8 Relative 9 Spheric 9 Pairs of elements 13 Parallel motions, see Straight-line motions. Passive resistance 5-8 Pillar crane 368-369 Pitch arc 284 Pitch circle 276 Pitch, circular 277 Diametral 277 Planing-machine, bed 83-84, 332, 336 Lubrication of 169 Table 82-83 386 INDEX PAGE Prime mover 3 Pulleys, cone 236-239 Crowning 236 Idler or guide 235 Proper size of 251 Stresses in arms 267-269 Stresses in rims 264-267 See also Fly-wheels. Pump, belt design for 245-246 Fly-wheel, design for 261-264 Punching-machine, fly-wheel design for 257-261 Frame, design for 337-343 Quick-return mechanisms 30-38 Lever-crank quick-return 32-35 Slider-crank quick-return 30-32 Whitworth quick-return 35-38 Rigid body 10 Riveted joints 87-118 Boiler-shell problem 1 12-1 18 Construction for tightness 108-109 Countersunk rivets 107 Dimensions of rivet-heads 106 Efficiencies of various kinds of 94-102, 103-104 Failure of 91-92 General formulae 101-102 Kinds of 90-91 Length of rivet 106-107 Margin 103 Methods of riveting 87-88 More than two plates no-ill Nickel-steel rivets 107 Perforation of plate 88-90 Plates not in same plane 111-112 Plates with upset edges no Slippage of 104-106 Strength of materials used in 92-94, 109 Strength, proportions and efficiency of 94-104 Riveting-machine, action of 87 Frame design for 3°9-37l INDEX. 387 PAGE Roller- and ball-bearings 210-220 Allowable loading 218-220 Forms of races 210-218 Lubrication and sealing 220 Rolling, sliding, and spinning 210-217 Size of 219 Rope transmission 251-255 Screws, see Bolts and screws. Screw-threads, see Bolts and screws. Set-screws 120, 157 Shafting, angular distortion of 176 Combined thrust and torsion 176-177 Combined torsion and bending 174-175 Hollow vs. solid 175-176 Line-shafts 177-180 Simple torsion 173-174 Shaping-machine, force problem 56-58 Quick-return mechanism for 35 Sheave-wheels, angle of groove 254 Diameter of 252 Shrink-fits 157-160 Skew bevel-gears 311 Slider-crank chain, acceleration diagrams 60-67 Description of 19 Force problem, shaping-machine 56-58 Force problems, steam-engine 58-70 Location of centres 15-16 Maximum velocity of slider 56, 373-3/9 Tangential effort diagrams 68-70 Velocity diagram 24-26 Sliding surfaces 162-169 Allowable bearing pressure 167- 168 Form of guides 164- 166 General discussion 162 Lubrication of 166- 169 Proportions dictated by wear 163-164 Slotted cross-head 18-19 Slotting-machine, frame design for 343-345 Spindles, see Axles, shafts and spindles. Spiral gears 3"-3i9 Splines, see Keys. 388 INDEX. PAGE Springs 327-331 Cantilever 328-330 Coil or spiral 330-331 Leaf 329-331 Spur-gears 275-304, 319-326 Steam-engine, boxes 199 Crank-pin 183, 186, 191 Cross-head pin 183, 186, 192 Fly-wheel design 264 Force problems 58-70 Frame, center-crank 348-350 Frame, "girder bed" 345-347 Frame "heavy duty" 347-348 Main journal 183, 186, 188-190 Steam-hammer, double-acting, frame design 355-357 Single-acting, frame design 351-355, 356 Straight-line motions 39-46 General methods of design 41-46 Grasshopper 41-42 Parallelogram 39-41 Watt parallel motion 39 Stresses in machine parts, compression 78-79 Constant 72 Flexure 79-80 Shock 77-"8 Tension 78 Torsion ; So-Si Variable 73-77 Supports 332-336 Divided 333-339 General laws for design of 332 Reduced number of 335-336 Three-point 334-335 See also Brackets, and Frames. Thrust journals 193-197 Toothed-wheels or gears 275-326 Addendum 277 Angle of action 284-286 Annubar 290 Arc of action 284-286 Backlash 277 INDEX 389 PAGE Bevel-gears 3<H_3II Circular pitch 2-,~ Clearance 277 Cycloidal teeth 28i,-284, 288, 290, 291, 301, 305 Depth, total 277 Depth, working 2- , Diametral pitch 277 Epicycle trains 322-326 Forms of teeth 278-284, 286-288, 294-297 ' Interchangeable sets 291-294 Involute teeth 286-288, 289, 290, 293, 301, 306 Toothed wheels or gears. Line of pressure 284 Non-circular wheels 303-304 Pinion 288 Pitch arc 289 Pitch circle 276 Proportions of ; 297-298 Racks 288-289 Reverted trains 322 Skew bevel-gears 311 Spiral gears 311-310 Spur-gear chains, compound 319-3-25 Spur-wheels 275-304 Strength of teeth 299-303, 309, 318 Theory of 275-276 Worms and wheels 312-319 Torque diagrams 68-70 Transmission, machinery of i See also Belts, Ropes, Shafting, and Toothed Wheels. Victor quantity 23 Velocity, angular 23 Linear 22 Relative 22, 24, 26-27 Whitworth quick-return mechanism 35-38 Work, definition of i Worm-gearing 312-319 THE LIBRARY UNIVERSITY OF CALIFORNIA Santa Barbara THIS BOOK IS DUE ON THE LAST DATE STAMPED BELOW. 