INDEX 



347 



WINDING OF ARMATURES (c.ontd.) 

 ALTERNATING CURRENT (continued) 

 Spiral Coils 



Form- wound, 319-322 

 Form versus Hand winding, 320 

 Hand-winding, 300-319 

 Slot Lining, 322 

 Strip Winding, 313-319 



On edge, 318 ; figs. 319, 320 

 Wire Winding, 300-314 ; (also 



figs.) 



Block for ; figs. 302, 303, 306- 



308, 310 



Pin Winding, 301 

 Hand versus Form winding, 320 

 Wave Windings (Bar Windings), 323 

 Winding Shop, Lahmeyer Co., 313 ; 



figs. 315, 316 



CONTINUOUS CURRENT, 254 et seq. 

 Form Wound 



4-pole, 10-h.p. motor for 500 volts 



and 950-r.p.m., 278-286 

 6-pole, 250-k.w., 320-r p.m., 550- 



volt Generator, 270-278 

 See also Coils, Form Wound 

 WINDINGS (Winding Diagrams) 

 ALTERNATING CURRENT, 163 et seq. 

 Closed Circuit or Re-entrant Single 

 and Polyphase, 163, 164, 

 240 

 Rotary Converter Windings, 185, 



243 ; figs. 240-243 

 Tapping for, 164, 240-245 

 Collector Kings, 166, 179, 182, 240- 



245 



Derivation of Types, Plate xiv. 

 Half-coiled Windings, 170 ; figs. 168, 



169 



Spread, 174 

 Open Circuit, 163 ct seq. 



Bar Windings, 227, 231, 236 

 Concentration and Distribution of 



Coils, 198 



Lap Coil Windings, 199-201, 225. 

 Nomenclature and Classification, 



197 ; Plate xiv. 

 Application of Scheme, 204 

 Polyphase, 178-240, and figs. 

 Armature, Divisibility of, 187, 



191 ; Table 189 

 Coils, Connection of, 211 ; figs. 



207, 213 



Derivation, 178 ; Plate xii. 

 Developed Diagrams, 212 ; figs. 



215, 219, 221, 223, 224. 

 Grouping of phases, 179-185; 



and figs. 



Properties, 191 ; Table 189 

 Ranges, No. of, 187, 191, 199; 



Tables 189, 202 

 Spread, 176, 210 



Three Range, 217-225 with 

 Coils of similar shape, 224 ; 

 fig. 222 



WINDINGS (Winding Diagrams) (cont.) 

 ALTERNATING CURRENT (continued) 

 Polyphase (continued) 

 Two Range, 204-217 

 Two and three phase Connections 



for same winding 

 Coil Windings, 205 ; figs. 206, 



207 ; Table 210 

 Wave Windings, 232 

 Whole -coiled and half -coiled, 

 170 Definition 199; figs. 

 200, 201 



Ranges, No. for Polyphase Spiral 

 Coil Windings, 199; Table 

 202 

 Retrogressive Wave, 198, 232 ; fiys. 



233-238 ; Plate xiii. 

 Pressure between Conductors, 



235 

 Short Coil Windings, 193 ; figs. 



193, 194 

 Single-coil versus Multi-coil, 172, 



173 



Single-phase, 164-178 and figs. 

 Coil, Concentration and Dis- 

 tribution, 172 ; figs. 171, 

 175 



Concentrated, 174 ; fig. 175 

 Development, 164 

 Distributed, 174 ; figs. 175 

 Lap Winding, 176 ; figs. 17.7 

 Ranges, No. of, 189/191 

 Spread, 174 



Whole-coiled and half-coiled, 1 67- 

 170 Definition, 198 ; fig. 

 200 

 Skew Coil Windings, 195 and 



fa 



Slots, No. per pole per phase, 202 ; 



Tables 203, 210 

 Spiral Coil Windings, 199-201 



Properties, 191 

 Wave Windings, 198, 204, 229 ; 



figs. 229-231 

 Whole-coiled and half-coiled, 198- 



201 



Polyphase Windings 

 Terminals, 179-184 

 See also Closed Circuit and Open 



Circuit, supra 



Re-entrant ; see Closed Circuit, supra 

 Whole-coiled, 167 ; figs. 168, 169 



Spread, 174 



CONTINUOUS CURRENT, 129 et seq. 

 Brushes No. for two-circuit and 

 multiple - circuit Windings, 

 145 



Conductors Two-circuit and Multiple- 

 circuit Windings, 143, 144 

 Current, Two-circuit and Multiple- 

 circuit Windings, 142 

 Derivation of types, Plate xiv. 

 Developed Winding Diagram, 138 ; 

 figs. 139, 144 



