INDEX 



341 



HALF Coiled Windings, see Windings, 



Alternating Current 

 Hand Shear for cutting Sheet Insulation, 



287 ; fig. 289 



Hand versus Form Winding, 320 

 Hanson, A. P. Combined Winder and 



Spreader, 264 ; fig. 263 

 Heating of Commutator during Assem- 

 bling, 112 ;fig. Ill 

 Hemitropic Winding, 170 ; fig. 169 

 Hobart, H. M. 



on Armature Windings, note 137 

 Equaliser Ring Construction, fig. 269 

 Form Wound Coil, 255 ; fig. 257 

 Holden Hysteresis Testers, note 21 

 Horn Fibre for Slot Linings, 246, 247, 252 

 Hydraulic Pressure for Assembling 

 Commutator, 111, 115, 117, 118 ; figs. 



112, 116 

 Core, 90 

 Hysteresis 



Loss, see Losses 



Testers, see Testers for Iron 



IMPURITIES permissible in Sheet Steel for 



Laminations, 11 

 Index 



Dies, 35-38 



Presses, see Presses 

 Induction Motors 



Air Gap Depths, 45, 104 ; Tables 46, 105 



Core Plate Stampings, 45, 46 



Delta (A) Connection for, 184 



Die for cutting Slot and Periphery, 45 ; 



Open Circuit Windings for, 163 

 Rotor, 6 ; figs. 6, 7 



Grinding Surface of, 105 ; fig. 106 

 Thickness of Core Sheets, 12 

 Winding, 216 ; figs. 216, 217 

 Closed Circuit Windings for. 164 

 Shaping and Securing Coils, 310 ; 



figs. 311 



See also Squirrel Cage Rotors 

 Slots used, Type, 105 ; fig. 106 

 Squirrel Cage, 95 ; Chart, 8 

 Starting Torque, 99, 101 

 Stator 



Complete, fig. 91 



External, Wooden Slot Wedges for, 



248 ; fig. 250 

 Frame, 70 ; fig. 73 



Wound for 8-pole, 3 -phase, half-coiled, 

 Spiral Winding, Diagram 

 207 Winding of, 302-308 ; 

 figs. 301-307 

 Type of Coil Ends, 190 

 Insulating 



Armature Conductors, 246, et seq. 

 Group of Bare Conductors, 267 

 Disadvantage of dividing Armature 

 Sectors at middle of Slot, 84 

 Form-wound Coils, 251 



Insulating (continued) 

 Materials, 246 et seq. 

 Jaconet Tape, 248 



Method of preparing and impreg- 

 nating, 251 



Leatheroid, 98, 110, 246 

 Mica for Commutator Segments, 107 

 Red Fibre, 98 

 Varnishes 



Copal, for Mica Plates, 109 

 Shellac for Mica Plates, 107, 109 

 Rings for Commutators, 107 

 Arrangement, 120, 121 

 Thickness of Mica, 117 

 Insulation (of) 

 Laminations 



Paper, Disadvantages of, 35 

 Thickness, 12 



Retrogressive Wave Windings, 235, 238 

 Slots 



Guillotine for cutting Sheet Insula- 

 tion, 287 ; fig. 289 

 Methods, 320 ; figs. 322 

 Specification for insulating 500-volt 

 Tramway Motor Armature 

 Slots, 249 

 Tests, 333 



Y and A Connected Armatures, 184 

 Iron 



Ageing, deterioration through, 10 



Loss, see Losses 



Testing for Hysteresis and Permeability, 



13 et seq. 



Apparatus for, see Testers for Iron 

 Specification for, 17 

 Standardisation Rules for, 27 



JACONET Tape for binding groups of 



Conductors, 248 

 Joints (Jointing) 



Between Armature Bars and Connectors, 



324 ; fig. 325 



Commutator Lugs, 291 ; fig. 295 

 Slot Insulation, 320 

 Strip Wound Coils, 265, 269, 272 



KEYING Laminations, 62 ; fig. 68 



Keys, Circumferential for 



Assembling Stationary Armatures, 93 

 Connecting End Flanges, 67 ; figs. 72, 

 73 



Keyways, Punching of, 40 



Kircheis, Erdmann Index Press, fig. 47 



LAHMEYER Co. 



Alternating Current Winding Shop, 



313 ; figs. 315, 316 

 Armature of 4000-k.w., 10,000-volt 



Alternator, figs. 220, 221 

 Assembling Wire Wound Coils, fig. 292 

 Continuous Current Winding Shop, fig. 



296 

 Terminals of Bar- wound Alternator, fig. 



327 



