None
PAOV Alternate-current motors— Monophase 687 Polyphase 663 Retarded field 693 Series 693 SpUt-phase 689 Synchronous 647 Alternating-continuous transformers 728 Alternating and rotating vectors. .*. 690 Alternators 579 As motors ■. 647 Armature winding of 580, 597 Asynchronous 606 Construction of 601 Coupling of 647 Excitation of 594 Faults of 776 For constant current 595, 640 For constant voltage 595 Fundamental formula of. ^.6| 658 In parallel 659 Specification of 787 Torque of 571 Width of pole-faces, &c 588 Aluminium, dynamos for reducing '. 412, 471 Amperage 840, 846, 371 , 629, 779, 780 ^7rip^6, on early dynamo 7 Amp^e^a rule as to direction of electromotive-force 22 Ampere-turns 117 Required on magnetic circuit 148 Calculation of 350, 356,861, 864 Amperes, virtual 554 Amplitude of alternating quantity 550 Of magnetic cycle 136 Analogy between electric and magnetic circuit 1 19 Andre's motor 523 Angle of lag of current * 556, 562 Of lead of current 566 Of lead of brushes 72,85,382,448,395, 514 Of polar span 74 , 387, 588 Angular speed 101, 178, 367, 549, 675 Anti-friction bearings 333 Apparent resistance of armature 89 Apparent watts 567 AppolcTs improvement of Prony brake. 754 Aragd'8 rotations ; 66 Arc lighting — Alternators 596, 640 Index. Aikinson LL B* (eee ateoCkioldeH) Hemopolar dycaijitfii ^•.•.« •.....«.•. 477 FulBaiikig motox 5tf JfiBierftac/ty on theory q£ djiiamo «.. — .. 20 Angmentor ».».... 718 Automatic regulatoxs (ase Regulatois) Auto-transformexa 718 Auxiliary winding on armatures •«...... 394 ATerage ^ectromotWe-^^orce 172, 555 AfpriGn^ W, E., on armatuTv Beasidon ^ » ..^ « 86 On size and output. ......^ 110 On d5fnaDM>teBfcing 763 On po^xnoi; tRBiBmsaBieia 493 A^riem Sl^emeyt on brake d^oiaBioiBeter. 755 CoDfitanb-speed motors 18, 581, 522 Motor 532 On magnetic shunts 155 On spariBless commutation. .^ 515 On spurious r^eaistance 89 On thtdbieaa of gap-epaizae 398 On transmissiou of power 740 P^edic governor ^ 521 B BilCK electromotive-force (see Counier electromotive-force. )< BlK^kward leadi of brushes ^, 3d6v 396, 514 .8a/c«r, on self -excitation 12 Biking and drying armaturea. 300 Commutators 317 BslanaB mstfaiDd of neaBuring power 756 BalaiKing^af araiaitau-es 2S5^ 331, 775 BalLbaaringa 333 Bar aornuitureB 298,804,4(02,405, 480 BarJbufa ratafiing. whe«I 17 Barry Befstmi, aaad. Teyfov; on waKve form 553 Barr, Bumie ojid Badgers^ on wavit iotm 563 Bars of commutator (see Commutator) B^st, D6, on. rotatory ^«ld motors « 21 Bl/iumgaa*dtf on.Gom^umi winding. 242 Baariags ^ .- 382 Pressure on ^ 327 Self-oUing -886 BiideU. and Crehore, on g^shQhio conatructiona foe fytamaHnc. currents 552 Index. 797 PAGK Bedell, on mutual induction ...•,••..«.,••«. 720 BedeUy Miller and Wagner, on finding form of wave.*., ••«« .« . . . 553 Bedell and Ryan, on synchronous moton.^« . •«.,.« ....«»•• ..dl^BSly 654 Bed-plates 15a,lB^.3W, 769 fe/Z, Louis, on compound winding. «•••• 2^ Beit-coUectois , .••^« 890 Biding stress on sliaft ^•••••^SSl, 775 Dttlin central station dynamos «••«••••••••«••••.».••. 407 Berlin type of ring armiatures ««.••••.•••••». ...dTS, 803 Bifurcation of current « «.••••««««. 257 Binding-wires «*«..,.48, 296 BloJoesley, T. H,, on alternating currents ••••»••«• .,»..•• 553 On three-dvnamometer method ••*•••..•••. 568 Biakey-Emmott alternator curve ••••«••,.•..••••••••«.«.• 558 B/otuJe/, on synclironiam of alternators ^^.....-.dl, 658 Bollman disk dynamo ••••• «*••«.«.••. 439 Booster 726 doraBs motor ••• 689 Bosanqu£t, on magnetomotive force ,« .. . 116 Bourbouze^A motor 488 BraoheW^'nie^od of meaanring power » 757 BracB^, C. iS.^Arc-light dynamos 465 On polypliase work •«^ ••••.••. 665 Two-phase alternator ••«.. 599 Two-phase motor ••«• »,• 671 Brake for measuring power « , . •,« 754 Branched magnetic circuits 119, 169«Hi Breadth of brushes .813,. 839 Breadth-coefficient 689, 693 Bregiiet, A,, on tlieory of dynamo 4 BretVs self -exciting dynamo 9 Brother1ioo<rs coupling , « ...••«.«......«. 338 Brousson, on alternator s output «... 589 Brown, C. E, L.— Altematom 683 Arrangement of alternator colls « ,.•..•.«.«•. 604 Cylindrical winding ,..•«..•.. 810| Dynamos • 415 j EUectro-metallurgical dynamos 413,. 473 Four-pole dynamos • .«• 409 Flexible-band collector 326 Homopolar dynamo ^ 477 Method of driving core-disks •.••«••«•••.•«..«. ..••.....,«, 293 Motors ...••• 410 Multipolar field 165, 887,. 499 r^MToed core^isicB. .■•.•....««..<«^ .*••.•••«. ..•«••••.•• .iivi «Bvl|.wB8 Polyphase motors. « • .^ .«• ••« ..••« . .. .^«,«.« . .^^ . .. 6Er8 798 Dynamo-Electric Machinery. PAOB Three-phase alternator 61^ Three-phase inductor alternator 646 Transformer 705 Broum, Boveri d: Co, (see Brown, C. E. L.) BnwTi^ Arc-lighting dynamo 451 Commutator 454 Machine characteristic 205 Open-coil dynamo 16 Uses shunt and series coils 56 Electro-plating dynamo 470 Induction sheath 451 Regulator 746 Brush Electrical Engineering Co.— Alternators 619 Dynamos . 417 Brush-holders 821 Insulation of 824 Brushes 82,812, 818 Carbon 819, 770 Care of 770 Lead of 72, 76,/78, 85, 882, 895, 448, 514 Of arc-light dynamo 448, 454 Thickneesof 820 Position of 514, 786 Burgin machine 285 Burning out of dynamos 778 Burstyn, on parcel running 766 Bushed pole 898 Cabanellas, on continuous-current transformation 727 On spurious resistance. . . . .• 90 On demagnetizing. effect of eddy-currents 92 Calculations of dynamo 889, 845 Of efficiency 847 Of magnetic circuit 848, 850. 856, 861, 864 CaldweLVs regulator 747 Capacity in circuit 564, 576 In mains 566 Carbon brushes 319, 820, 770 Cardew, Major^ on dynamo testing. ., 758 Voltmeter 554 Carharty on Jacobi's law 500 Carpen^ier, on brake dynamometer 755 Cast iron, magnetic properties of «. 122 Index. 799 PAGE Causes of sparking 79,88, 881 Ontrifugal governors • 620 C.Q.S. magnetic units 144 Characteristic curves • 196 Of separately excited dynamo 185 Drooping 466, 766 External 202 Internal 210 Relation of, to winding 207 Of motors 502, 505 Choking coils 566 Coking coil, transformer as 698 Circuital distribution of vectors 115 Circuit— Electric 26 Magnetic 114 Circulation of power 758 Circumflux 888, 884 City and South London Railway plant 545 Clarke's dynamo 8, 479 Clausius, R.t theory of dynamo 20, 190 Cleaning dynamo 771 Clerk Maxwell {see Maxwell) Clock diagram 550,591,648, 652 Closed-coil armature 87, 89, 61 Magnetization of 71 Two paths throu gh 60, 62 In arc-light dynamos 466 CoefScient of leakage 151 Of self-induction 560, 720 Of transformation 697. 720, 727 Coercive force 183 Coils— Of alternator 604 On transformers • 704 Position of magnetizing 150 Collars on shaft 881 Collecting rings 812, 826, 885 Collector (see Commutator) Combined plant 762 Commercial efficiency 347 Commutation— Diameter of 78 In motors 514 Commutator 82, 87,40, 812 Bars 80, 813 Care of 770, 771 Distribution of potential on 66, 68 Exploration of 63 8oo Dynamo- Electric Machinery. PAOS Commutator— Flats in 775 For rectifying; 694 Invented by Sturgeon., ..••••<. «^. <•••«- ,. 9 Of Beriin dynamos , 302, 407 Of Brush dynamo —«•.•«••.••«. .^.•.. 452 Of open-eoildynamos^.... ,••«..,«.. 447 Of Tiiomson-Houston machine ..•,..«. 450 Of tramway generator ^••••, .•«,• •,«•««•«••.. 434 Oilier x>ortion» of conduotoiB as .^275^992, 407 Sparking at {and set Sparking) .., 78 -Commuting coils >. • ^ 4S^ Comparison of single and polyphase alteraatoxsr. .««••« .•••««•«•.. . . 601. Compensated armatures-. • . . ,.• .8M^.886,.9^i; 394 Com poun d d3rnamo8 , coupling ofw. ....• 767 Compound winding ••••• JlSff 55;.283, 523. Calculation of 80S Experimental determination' of I • «,•••«..«• 3M In arc-light dynamos. .••... •• 446 In motor ••.•«••«••••.«««••••«•••«• 528. In altematoTB ••••••• •«•«••«. •«•••*«■ 59ft Slow in action •••••«•••<.••«•• 142. Compression, e£Pect of; on magnetization •••.••• 204. Concentration of field 308- Condenser; action of synchronous motor. ..•<.«•.«••««••.«••.•. 654 GonductoTEP— Drag on •......•,••• ••...86, 103 Embedding of 99 Kinds of, on armatures .••.....29^;. 343 Lamination of; , ..^.^ 343 Moved 'in magnetic field. • • 22 Number of; ^ 168 Connecting up altemate-ctnTent armatures ..••.. .581, 685; 587, .596, 5B6 C6nnec tors 804 Junction with oommutator. 318 Consequent poles , 161 Constant-current 502,.598j 5ia Alternators for 595, 046 Dynamos for 44S' Motors for 58^' Regulators for. 744- Transformers for. 717 Constant BleetromotiTe-foroe; ■ 18ft Constant speed; 562, .511;. 582, 529 Constant torque 502, £W, 749 GonstrartToltage .54, 5DS; 508^ 511, 523 Dynamos 54, 224 Index. 80 r PAGE ' Constant voltage — Alternators. • 595 Regulators ..«••. 744 Cdnetruotian, practical, of armaitoreflk • • 342. OfaUernators GOl Of commutators. « ..^..^ 815 Of motors 5W, 673 Of transformers -. ..«....•.-.• 700 GoBtihuoua-alternatlng transformers ^... 728 Go&tinuity of current « 38, . 176 Continuous and alternate-current windings •« 587 Continuous-eurrent. dynamos. • .•••..^«. «.».««•. 399 Calculation of - 353 Coupled in series « ••••• 76& Gontinnuus^current nM)tor8 • ....• ••.. .482,. 531 Convertible alternators .<..63A Converters {see Transformers) CooA:« uses- electromagnet in dynamo 9 Cboliiig surface of magnet coils- 873, 397, 622, 717 Cbpp^r — Amount expended on line «....« 740 Deposition of 786 Heat waste per lb - 371 Specification of conductivity 786, 788, 796 Specific utilization of 868, 626 O^pper and iron losses in transformers « 70O, 703, 715, . 717 Cores of armature 41,43, 44, 284, 451, 583, 602 Of rotor and stator 674 Of transformers 702 Ciii«-diaka 284,367 Methods of driving 291 Toothed i 286,483,544, 588 Pierced ...260,625. 6T4 Counter electromotive-force in motors 485, . 496 In synohronous motors 649,651 In transformers 69T, 709 Couple {see Torque) Coupling of alternators ^ «« 647 Of dynamos 765 Cbuptiii^-fov direct driving 337 Cotton covering of wires «... 779 Creeping, magnetic • 141 Oltibal current «....«... 209 Critical speed ai0,.478,.525, 752 Crother, F. B,, on liigli volta^ dynamos - . . - . .466, 473 CiTooher^^Vlteelir — Gore-disks. « 287 M^tOTSi... 533, 536 57 8o2 Dynamo- Electric Machinery. PAOI Crocker- Wheeler — Motor-generators • 725 Self-oiling bearings 886 Crompton, R. E., on efficiency of dynamos 763 On end-connecting 807 On compound winding 57 On ring windings 801 On stranding conductors. 299 Cronipton db CoJ^s dynamos 17, 401, 471 Cross-compounding 889 Cross-connecting ring armatures 276 Cross magnetization 70, 882, 679, 681 In motor 514 Current and torque ••••.••.... 102 Current, alternating 547, 551 Current-carrying capacity of wires ..••......,. 779 Current-density, effect on heat waste 370 Permissible 840, 846, 870, 622, 779 Clirrent in conductors, method of indicating direction of 78 Curve of integrated electromotive-forces 62, 66, 66, 78 Curves of magnetization 122 Cutting of magnetic lines 22, 27, 168, 475, 649, 675, 696 Cycle of alternating current 551 Of magnetization 188 Cylindrical winding, Brown's 810 D Dal NegrOy his machine 7 Motor 18, 488 Damp, effect of ', 769 Data of machines of various siises 480 Data (see Tables) Davenport's motor. 18 Davidson's motor 18 Dead turns 88, 92, 206 De Bast J on rotatory-field motors 21 Definition of dynamo machine 1 De la Rive, on magnetic circuit 115 Demagnetizing effect of armature 70, 84, 858, 864, 880, 887 Inmotor 514,530 In alternator i 595, 654 In rotor , 681 In transformer 698 Of eddy-currents 84, 515 Density of current 840, 846, 870, 622, 779 Of magnetic flux 115, 119, 842, 868, 430, 606, 715, 716 Index. 803 PAQC Deposition of metals 468, 783 Dejgrtz^ Marcel^ on characteristic curves 198, 200, 204 On compound dynamos 65, 239, 446 On constant potential dynamos. 17 Design for dynamo 400 On field-magnets 161 On law of similars 109 Method of measuring power 757 On regulating motors 520 On theory of dynamo • 20 On transmission of power 18 On two-phase combinations 663 Depth of winding 780 Deptford station plant 618 Derivation (see Shunt) Design of dynamos 45, 839, 396 Of alternators 588 Of motors 531 Of transformers. • • 715 Desroziera—Diak dynamo • 43, 442, 480 Disk-winding 280,282 Magnetic shunt 744 Developed winding diagrams... JMrowMk^^ von Dolivo — '0n buiked poles ••.......« * « 893 'On polyphase work ...«....« 665 Double magnetic circuit ^. .^...1:60,160, 167 Douglas and .LaxQ7 railway plant •^..... « 426 Douglass on early dynamo .^ 10 Dove an magnetic circuit.. ••• 115 Drag in case of embedded conductors 99 On armature by distorted field 76, 76 On conductors M, 108, 486 Drawings, specification as to 786, 766, 790 Dredge, on theory of dynamo 4 Dr^strom ••.....»•.. 405 Driving horns ;166, Driving spokes Drum armature. ».J15,-41, Design of 339 For alternators 58^ Reaction of 7S Winding of ja44, 255, iW5, «B Drying armature. 30^ I>tc6, on magnetic circuit IIS DuiBovs, onrmagnetic properties of iron. 127 Du^'ardirCs ** inductor "mcLchine 10 Oscillatory dynamo IS Du.Moncel, Count, his early work •. J4, 10 DuncauBMd 'Hasten, on dynamo tests ■ 764 Duncan, L,, on alternate-current motors 31 Dynamo — As motor 16 Definition of 1 Barts of ■ S iBiseases of 63, 464, 773 tEarly forms of 6et teq, Managementof 765, 760 •Origin of word « ..►•...,... IS Dynamometer , 755 Dynamometric. governors • .531, 740 Economic coefi&otent .107, 185 Economy of transmission 795, 740, ^745^ EddyH3urrents :«0, 92, 290 Demagnetization due to 64, '5f5 Driving of motovs by 665 Loss, calculation of.. •••••^ »... r...... •••.. ^. I8T Index. 805 PACK BfldyHnirrentein transformer ».^...—^ «.^^ ^860, 74K> £Ut8on, r. ^., on auxiliary winding .«.».•....••....« .... 884 On continuous-current txansformation 727 Biak dynamo 16, 870 Early dynamo 16 Regulator Sd6 •Standard dynamo -497 'Method of end-connecting -805 EAwm Co^s dynamos 427 Edvson-^HcijgklMicm dynamo »....•... 421 Calculations of 855 Efficiency of 195 Effective Tohs andamperes 554 Efficiency calculations 847 Effidanoy-^Commercial 186 Electrical 165, 186 Of combined plant 762 Of dynamos 107, 165, 759 Of motora. 487,490,-497, 676 Of transformers, effect of wave form 712 Of transmission of energy.... :786, 740, 742 Testing 758 Specification of 767, 780, 791 BiiikBnie(fer'8 armature winding 8U0 Dynamo 164 ^Bctiical efficiency 847 Electric governing of motors 521 Blectrio motive power, theory of 489 Elttotnc.sailwayplcuit .424,426, 540 Sl«otro-metalluigy statistios 788 Electro-metalluxgical dynamos .418, 4fi6 Bkctromotive-force in mcving conductor » ...^2, 20 Addition of, in closed-coil armatnves., ». FAoa Embedding conductors in iron.. 99 Emission of heat at surface 373 End connectors 304 End play of shaft 881, 338 Prevention of 333 End plates of armature core •. • 298 Energy, where expended, where utilized 96, 487 Equations of dynamo 46, 170 Of motor 494 Of alternator 46, 549 Of alternator as motor • 658 Of asynchronous motor 684 Of transformer 696,699, 722 Of motor generator 728 Esson, W, B,, on armature reaction 72, 382, 384 On arc-lighting dynamos 465 On binding wires • 297 On load curves • • • 381 On multipolar machines. • • • 21 , 896 On permissible heating 378 On peripheral speed 867, 875 On size and output • 110 EttingshatMerCa machine 8 Evershed, on transformer design 716 Evolute connectors • 305 Ewing, on magnetic properties of Iron 127, 129, 135 Magnetic tester 137 Method of exploring commutator • 66 Excitation of field-magnets 47, 52, 66, 197, 810, 224, 594 Of synchronous motors 652 Excite, dynamo fails to 776 Exciting current in shunt 370 Exploring olectromotive-force of armature 63, 73 External characteristics 202, 210 Extra-high-pressure dynamos. 478 P Failuke to excite •••••••••••••• 776 '^ Falcon" dynamos ...••... •••••••• 419 Faults in armature •••••••• • 772 In field-magnet coils • • 776 Of alternators • 776 Index. 807 PAGE Twaday^ ificAael— Disoovera induction, 1, 8, 29 His disk dynamo. • 6 Electromagnetic rotations 17 His reeearclies 5, 6, 7 On magnetic circuit • 115 On magnetic lines. .....•• 26 Hisring 605 Jbrmer, JIf 08M C?., on self -excitation 12 Vavr^n researches ^ • 19 Feathers 887 JWn'« dynamos • 406 Fddmann, on alternating-current wave form 718 Fmranti'8 alternators 16, 685, 586, 616 Mains, capacity effect • 566 Rectifiers 781 Transformers 707, 714 Ferraris, OcUileo, on magnetic rotation • • 21, 664, 665 On monophase motors 600 Fcussner, on parallel running 766 Field— Ck>neentration of 898 Magnetic 118 Field-magnets 84 Advantage of powerful 95, 880 Branched 119, 158, 159,478,601, 629 Design of 841,844, 878 Excitation of 47,52,56, 197,210,224, 594 Forms of 1 58 , 378 Formul» for 148 Of motor 515 Finzif on hysteresis 141 FUcher-Hinnen, on armature compensation 891 • ' Flashing over " 88, 464 Flats on commutator 775 Fleming, J. A,, on alternating currents 552 On altomate-current wave form 712 On capacity effect in mains 566 On finding form of wave. 8o8 Dynamo- Electric Machinery. PAai Flux-density— Calculation of 348,800, 864 Effect on losses in armature 762 In multipolar maohines ......' 8OT In transformers »...• 188, 715, 717 Flux— Magnetic «•.. 114, 145 Regulation of 744 Fontaine's transmission of energy « 784 Fontaine and Oram/mej transmission of power 18 Fonviellej on rotation of iron disk 987 ^or&e8, Pro/. George, on carbon brushes 819 Designs for Niagara plant. 980 On hamopolar dynamo • 476 On transmission of energy 741 Farce on conductor in magnetic field 8 Form of wave of alternating currents • 548,711, 718 Farmulse for the electromagnet .....•• 148 Foticault currents • 90 Foundations • • 769 Foundation ring for armature. • 884, 281, 417 Fourier's series • • • •. 569 Frankfort— Central station plant • • 684 Exhibition tests 764 Transmission • 741 Frequency *d49, 560, 574 High 670, 578 Usual 579 Friction 106, 382 Measurement of loss by • 761 Fringe of field 81,108,856,861, 898 Friih^ on flux regulation • 744 Fritschey on armature winding • • • •. J31, 844, 272 Ondiskwindmg 280, 480 Fr&lich, Dr, O., on armature reac^on.. ••••• 86 On characteristic curves ••• 200 On compound motors 528 On electromagnet 148 Equations of electromagnet • •• 20 On eddy-currents •••••• 90 On Siemens' dynamos • •• 405 On size and output • 109 .FVvmeit^'s motor • ••• 18, 484 /VoimI^s Inake dynamometer • ••••• 755 Fun load, calculations at.... «•••••«•••••••••••••••••• Index. 809 a PJLOS Gkiiabeiy on armature distortion 69 OoMZ^s dynamos 406 Gans-Zipemowski alternators 611 Gap in magnetic circuit — Elffects of 128 Thioknessof 387,896 Widening of 8T9 (?du(7ain, J. Jf., on curves of integrated electromotiTe-foroes 4, 63 Gauge of wire for armature 849,846,869, 779 Gauss, the 119, 144 Gauze for brushes • • 318 QtfMTdL Electric Co.*8 Alternators. 626 Dynamo 439 Railway motors • 648 Genoa transmission of power 788 German-silver, use of. 698, 785 Gflbert, the 144 Cftmrges on output of polyphase machines. •• 601 Gold, deposition of 784 Oooldend: Co. *« Brush-holder 898 Dynamos 484 Mining motor ..••. 688 Regulator 745 Goolden-Willans plant, test of 764 69kirdon'« alternators 18»699, 607 Governing— By steam-pressure. 749 Dynamometric 749 Government of motors 619 Governors 996, 468» 696^ 748, 748 G'ramme— Alternator 680, 589 Armature. ..15, 41 Dynamos 400 '* characteristic of 906 Motor generator 734 On coupling of series dynamos. Helios Co.*s alternator » 611 Helmer, design of 478 Heilmann locomotive dynamo 415 JleinricJi's dynamometer 756 Jleisler's constant-current alternators 640 Henley's inductor dynamo 10 .Henry's motors 17, 488 Henry, the 560 Hering, Carl, on armature winding 21, 244 On homopolar induction 478 On magnetic leakage 152 Herriek, on rheostats ; 744 jHerwig, on theory of dynamo 20 jfieteropolar dynamos, 475 Heteropolar induction 475 ^igh frequency 570 Sk in effect 578 High voltage — Dynamos 47S Commutators for 446, 465, 47d In transmission 694, 782 Historical notes 5 Hj'orth, SdreUy his machines 11, 56 JSochf eldcn transmission 788 * Hochhausen's designs 400 Holes in core-disk 99,286,290,604,625, 628 \ Holmes's dynamos 10 , Holmes J, H, <& Go's, dynamos 436 Holmes- Willans combined plant, efficiency of. 762 Homopolar dynamos 475 Homopolar induction 5, 475 Hoppe, on homopolar induction 478 Index. 8ii PAoa BopX»7t«(m, Drs. J. and U., on dynamo design. 20, 421, 428 On excitation by backward lead ..••••••.•• 87 On alternators 612 On magnetic circuit 145, 158 Hop/nn^on, Dr. </., on armature reaction. 882 On coupling alternators • • 21, 578 On characteristic curves 198 Electro-plating dynamo • 470 On loss of power in magnetization •••..• 140 On magnetic properties of iron ••• 122 On magnetic calculations 117 Method of end connecting • 806 Modification of Edison dynamo 858, 421 On railway motors 545 On retardation of magnetism.. ••••.. • • 142 On reversing gear 518 On size and output • 108 On testing dynamos • • • 758 Oxi theory of alternate currents. • • 578 On theory of transformers ••••• 719 On torque of motors • 509 Horns, or pole tips 80,98, 898 Horns, driving 296 Horse-power of dynamos and motors • • • .lOd, 531 Horse-power testing • • . 758 Hospital ier, E 242 Housman, on armature compensation • • 889 On ::eparation of losses • • • •• 761 Houston, E, J. {and see Thomson-Houston) • ... 458 Hummel^ on causes of losses 764 Humphrey and Powell, on transformer-current curves 711 Huntf R.f on electromagne^ism as a motive power • • •• 484 Hurmuzescu's dynamo 478 Hutin and Leblanc, on alternate-current motors 21 Alternating-continuous transformer 729 Ammortisseur 892 Hysteresis 106, 188 Loss 185,187, 760 Increase of, with time .• • • 142 In transformer 698,712,715, 717 Hysteretio constants 187 8i2 Dy7tamchEleciric Machinery. Idle coil 6T, 449 Idle current (aee Wattless current) Idle wire 41, 420 Imbricated conductors »••• •••••...•.. 40d Imbricated joints in iron , 707 JmrniseA's motors ••» • • 533 Reyersing gear for. • • .• 518 Impedance .• • .; • • 562 Impressed field • 678 Indicator diagrams ...•• 753 Inductance • ..• 560 Induction coil »»«• .••• 695 Induction of electromotive-force • •!» 8» 2B» 24, 29 Induction in uniform field 61 " Induction," magnetic (ami aee Flnx-density) 120 Inductor altemat<»n .10, 640 Instantaneous value of eleelromotive-foree..... 549 Insulating materials— Air S15, 705 Asbestos. 44 814, 614, «29, 771 Canvas 294,^8, 453 Cotton • 779 Cotton cloth 458 Ebonite .399,835,825,429,619,033,707, 708 Enamel 394,299, 681. fibre, bard white 296,314,884, 482 Film of oxide 285, 299 Film of oil 299 Glass 616 fudJarubber ...294» 688 Insulating paint •. 294 Ivory • 488 Japan * 294 •'Made mica" 429 Mica 44, 284, 294, 814, 429, 614» 623, 771 Muslin ...^ 429 Oa 429, 706 Oiled linen 431 Baper 294,808,451, 705 *' core-papers 429 " ManiUa 294 '• oiled 431 " paraffined 294 " parchmentized (Willesden paper) 294, 814, 533 *' pressed board • 429 ** varnished... 285,294, 451 Index. 813 PAOB iiiBulatiDg materials- Plaster 3U Porcelain 616 Boi>e, hard • 429 Rubber varnish (Scott'sX 294 Shellac S14» 868, 451 Silk ....299, 628 Slate 621, 628 Sulphur 616 Tape 286, 801, 48«. 481, 621. 765 Vainish. 44, 285, 294, 429, 451, 705 V ulcanized fibre *. 614 Wood 290.296. 614, 708 Insulation of armature cores • 42,284, 294 Of brush-holder ••.••......••..••• 824 Of collecting rings •.••.••••• 826 Of commutator 814 Of dynamo from ground 774 In transforinei-s 708 OfwiiL»8 779 Insulation resistance ....•• 752 Specification of 786,788, 790 Insulation tents 772 Intensity of magnetic field ......... 113 Intercbangeability of parts .785, 787 Interference of armature (see Armature reaction) Isenbeckj on armature exploration • 63 On curves of integrated electromotive-forces 62 Iron and copper losses in transformers. 700, 715, 717 Iron in armature of alternator 598, 602 Iron, magnetic properties of 112, 122 Iron {see Armature, Ck>reB, Flux-density, HystereBis) Jackson, Prof. D. PAGE Johnson A Phillips — Kapp's dynamos 859, 408, 607 Transformers 705, 714 t/b/i7i«on, on early dynamo 11 Joints in magnetic circuit 139 Joubert, on finding form of wave 552 Method of exploring commutator 68, 65 On spurious resistance ••...' 89 On theory of alternate currents 573 On theory of dynamo 20 Joule J. P,, on back electromotive-force of motors • • .486, 491 On electromagnet 143 On magnetic circuit • 115 Law of 493 Motors of 483 Joules researches • • • 19 Journals 1 828 Joyce^ on heating of conductors • 876 K iTapp, Gw6crf— Alternators 653,582, 607 Brush-holder 824 Conmiutator 815 On depth, &c., of winding 782 Dynamos 402 Dynamo, calculations of 857 Efficiency of. 195 On dynamometry 755 On leakage in line 499 On limits of load 886 On magnetic calculations 117 On magnetic circuit 145 On method of driving core-disks 292 On method of end-connecting 807 On separation of losses 760 On size and output 109 On testing dynamos 759 On theory of dynamo c. 21 On transmission of energy 509, 740 Transformers •. .705, 714 On width of pole-faces 588 Kelvin^ Lord — Altematoi-s • .16, 618 Disk dynamo 479 On efficiency of motors • 491 On theory of dynamo •••••...•• 20 On theory of homopolar dynamo. • 478 Index. 815 PASS Keltnn, Lord — On transmission of energy 740 On wave winding 090, 018 .Kennedy.A. B, IF., test of combined plant. 702 Kennedy, Rankine — Ironclad dynamo 102 Alternators 682 Polyphase motors. 087 Kennelly on armature reaction 86 On reluctivity 144 Keys 887 KingdofCB inductor alternator 640 Kohlrausck, on armature distortion..'. Lead of current 558, 561, 565, 666 Caused by synchronous motor 654 Effect on field 5W, 654 Lead of brushes 72,76,78,85.882, 448 ^ backward 395, 396 ,, in motor « 514 " Leading " polar horn 76,94, 382 Leakage in line 499 Leakage, magnetic « 150 Leblanc (see Hutiu and Leblanc) IJecliery on homopolar induction • 478 Ledeboer, on parallel running 766, 768 Leicester central station plant 622 Length and diameter of armatures 92, 342, 377 Length of conductor per volt 476, 622 Ijenz, on dynamo as motor • 18 On electromagnet • 143 Law of 516 Researches 19 Le Roiix, on theory of dynamo «. 19 On theory of alternate currents 573 Lightning an*esters • 774 Limit of armature current 361, 886 In multii)olarB 396 lAnde, on finding form of wave 552 Line, integral, of tlie magnetic forces 118 Lines — Magnetic •«... 113 Of force as distinguished from magnetic lines 114 Of magnetic induction 120 Liverpool overhead-railway plant 545 Load on dynamo, limit of 861, 886 Locomotive motors 540, M5, 546 LodgCy Oliver J.y on impedance 562 London Electric Wire Company's data 779 Lontin's machine 15, 43 LoomiSf on the location of armature faults 775 Loss of power in magnetic cycle 135, 189 In transformer 700, 715, 717 Losses, separation of 760 Lost amperes 190 Lost volts 180 Calculation of 345 Lulorication of bearings 384, 619, 624 Of commutator , 771 Lubricators 334 iMmmiS'Paterson, on dynamo management 772 Indcx^ 817 K MX Maqnet ooUb, hefttingaf ••«••••• 909 Kagnets, forms of •««•••«•«•«« •••••••••••• IM Magnetic calculations M6« S56, Ml Hagnetio oixxmit •••••«•••• ^ 114, 145 Air gap in \ 128 Joints in • ••»••»•«••• • « 129 Branched ^.. •*.... 119, 150 Calculations of I»H), 856, 981, 864 Reluctance of 119, 120 Hagnetio— Conduction • •••••..• 118 Creeping « « 141 Cycle 184 Field about conductors • 24, 98 ,. rotating ••••.••• 266 „ stiffnesBof 893 Flux ^ 114, 168 y, calculations of •*••••• 848 Leakage 150 ^ allowance for ••• 849 ^ in asynchronous motors »...•.... ^ FAOI *• MBnohesrer ** dynamo 420 Manchester street station plant d25 Maquaire^s regulator 745 Martin and Wetzler, on motors 484 Mascart apod Jcubert, on size and output 108 Mascartt on theory of dynamo 20 McL89on'g improvements 10 Mather^ on armature compensation 889 Mather and Pto^f— Alternators 613 Gar motor ; 644 Railway motor • 545 Dynamos 420 Equalizers 726 Mavor and CouUon — Dynamos 488 Mining motor 540 Maximum — ^Armature current 381, 886, 896 Power of synchronous motor 655 Values of sine functions 554, 564 Maxwelly J, Clerk, on self -exciting machines 19 On self and mutual-induction 719 On theory of alternate currents 563, 573 On theory of transformers 721 Mean power, alternate-current 566, 571 Measurement of alternate-current power 567, 568, 571 Of efficiency , 758 Of fluctiiation of electromotive-force 178 Of insulation resistance 752 Of magnetic leakage 752 „ properties of iron 127 Of power 753, 758 Of resistance of armature 751 Of total flux 178 Mechanical actions and reactions 96 Mechanical characteristics 502, 528 Mechanical points in design 327 Mesh connection of polyphase circuit 669 Menges, on armature compensation 391 On dynamo testing 758 Meyer, on theory of dynamo 20 Meylan, on parellel running 766 Mild steel, magnetic properties of 128, 127 Jftnef, on dynamo tests 764 On Edison dynamos 427 Mitis metal 127 Moncel {see Da Monoel) Monophase motoro 687 Index. 819 PAOB Uordey, IF. If., on alternate-current waveform • 718 On alternator curve 558 On armature exploration .64, 06 On coupling compound dynamos 767 On finding form of wave 552 On motor and dynamo analogies. 516 On parallel working 21 On the shunt motor 529, 580 On slow changes in iron 142 On synchronous motors 658 Alternators 619 Inductor alternators 641 Method of cross-connecting 276 Methods of exploring commutator 68, 66 Multipolar ring 16 Transformer 702, 714 Victoria dynamo 417 McrirCa dynamometer 756 Motors — Action of alternator 571 Alternate current (see Alternate-current motors) Asynchronous 862 Characteristics of 505 Commutation in 517 Continuous current 482, 581 Determination of windings 527 Direction of rotation. ; 517 Efficiency of 487,490, 496 Historical notes 17 Laminated 698 Monophase. Multiplex windings 279 Multipolar — Brush dynamo 457 Dynamos, design of • -..flOC, 580 Drum winding 265 Ring for altematois 581 „ windings 275 Polyphase plant 672 Murra^s dynaznometer 756 Tests of brush dynamo 458 Murray^ on self-excitation 12 Mutual induction 94, 719 Negro {see Dal Negro) JV^umann, on laws of induction < 19 On theory of alternate currents 57S Neutral point on armature shifted 70 Neutral points on commutator 77, 78, 257, 8d9, 515 Newall, on joints in magnetic circuit 129 Niagara plant 636 Niagara transmission. . . '. 737 Niaudet, Alfred, on theory of dynamo 4 On gramme dynamos 401 Nickel, deposition of 784 Noise in running 777 NaUeVs machine 10 Non-ooncentrio poles 894 *' Non-polar ** dynamo 476 O Oerlikon Co. — ^Alternators 627 Drum armature 807 Dynamos 408 Electro-metallurgical dynamos 472 Polyphase motors 678 Transformer 704, 706 Oerlikon works, transmission of power to 786 Ohm Dr. G. 5., law of - 28 Oil (see Lubrication). As insulator 429, 705 Insulators 742 Open-coil armature 40 Advantages of 464 Open-coil dynamos < 447 Index. 821 PAOI Organs of dynamo • 81 Oscillatory dynamo 16, 43^7 Output and size 102, 108 Output of alternators 589 Over compounding 287, 289, 728 Over-excited synchronous motor 654 Overload 786 Over-type, support of armature in, 827 P ^Dusinotti — Armature , 18, 14, 16, 41 IMsk dynamo 278, 479 Motor 18 Toothed core 286 Ptige — ** Inductor " machine ... 10 Motor 18, 483 Paper (^e Insulating Materials) Paiallel— Alternators in 647, 659 Coupling machines in 766 Paris and Scoffs method of end-connecting 807 Parker's dynamo 487 Par8/ia/r« multipolar dynamos 484 J^r«onfi— Turbo-alternators 624 Steam turbine, efficiency of 624 763 Pateraon and Cooper — Core-disks and spider 291 Dynamos 439, 470 Pedestals 883 Peripheral speeds 109,299,867, 476 Period 549 Periodic governor. . . 521 Periodicity 549 Permeability 120, 8^ Curves for iron and steel 125 Permissible heating 752 Perry, John (see Ajrrton and Perry) Ringwinding 276 Constant-speed motors 18 On shaft stresses 821 On theory of transformers 728 Pescetto, on size and output 108 Petrina's machme., l 8 Peykertj on armature reaction 87 Phase of alternation 550, 555 Phase-difference 649 Phase-relation in transformers 708 822 Dynamo-Electric Machinery. PAOB Phase-splitting 689 Phase transformation 781 Picou, R, V,, on rotatory-field motors 21 On self-governing of motors 539 On synchronous motors 21, 652, 655 Pitch 588 Pixiif his machines 7 '* Phoenix *' arc-light dynamo 465 Dynamo, particulars of 366 Plilcker*8 homopolar dynamo 475 Poggendorff—Ck^minnt&tov 8 Investigations 19 Polar-span, angle of 74, 887, 588 Pole armatures 41, 584 Pole-pieces — Eddy-currents in 92 Effect of shape on wave form 569 Lamination of 91, 602, 686, 643 Varieties of 393, 394 Pole-faces, width of 588 Pole surfaces, shaping of 68, 88, 95, 160, 888, 891, 898, 894, 471, 552 PoUak^s rectifying commutator 731 Polechko's dynamo 481 Polyphase and single-phase alternators 601 Polyphase — Alternators 598 Motors 2 1 , 662, 673 ** history of 19 *• theory of 21, 675 Transformers 718 PoncdeVa improvement of Prony brake 754 Ponemah Cotton Mills plant 661 Position of d3mamo 769 Potential at terminals 180 Potential, magnetic 119 Potier, on rotatory-field motors 21 Power — ^Alternate-current 566, 571 Characteristic 200 Mean, of alternate currents 577 Measurement of 753 Of polyphase motors* 676 Of synchronous motor 650, 652 Product of two factora 100, 493 Power-factor of transformers 709 Practical construction of armatures 284 Pressure on bearings '. 327 Preston, T., on homopolar induction 478 Prevention of sparking 80 Index. 823 PAoa Primary and secondary currents 695 Products of periodic functions 557 Prony'a brake 754 Puffer, on parallel running 766 Pulley, overhung 880 Pulsating motors '. 4 546 Pulsation 574 Pulvermacher'8 machine 8 Pyke and Harries indicator alternator 643 Pyke and Salomons transformer 703 Q Quadrature 557 Quarter phase 577 B Racxng of motors 519 Racking of armature conductors ^. .185, 817, 672, 777 Of connectors •. PAom Regulation of motors 51d Of Parson's turbine , 635 Of Thomson-Houston dynamo 461 Regulators 748 Reignier, on regulators 748 Relation between size and output 840 Reluctance of magnetic circuit 116, 118, 119, 120, 145 Reluctance, calculation of 350, 856, 861, 864 Reluctivity, a lineal function of H 144 Remanence 183 Renahaw's spherical bearings 888, 884 Residual magnetism 133 Resistance — Effect of, in rotor 681 For regulating 236,445,744, 747 In characteristic 206 Insulation , 752 Of coil, relation to size , 877 Of shunt coil 870 Of wires 782 Spurious, in armature 89 Resultant magnetic flux 675, 678 Retardation of phase {see Lag) Of magnetism ,.,. 141 Retarded field motora 693 Reversal of current in armature coils , 80 Of motor field 617 Of polarity 50, 469 Reversibility of dynamo 18 Reversing gear of motor 518 Rheostat as regulator 226, 446, 744, 747 Rheostat, specification of 785 Rhodes, on synchronous motors 21, 659 Richardson*8 governor 748 Right hand rule 22 Rimingtony on alternate current- wave form 712 Ring armatures — Cross-connection of ' 276 Winding of 87, 40, 71, 251, 258, 275. 580 Magnetization of 71 For alternators 580 Series connecting in 276 Pacinotti's 18, 14 Gramme's 15 Multipolar 275 Ritchie — His machines 8, 10, 18, 483 On magnetic circuit , 115 RoibirCs disk dynamo 480 Index. 825 PAOI Rooken. 78, 822 Booking of brushes 78| 771 Boessler, on alternate-current wave form. 718 Romilly, on drum winding 18 Rotatory magnetic field M2, 666 Rotor 674, 668 In alternating field 688 Effect of resiBtanoe in 681 Of Stanley-Kelly motor 687 Rowland, on relation between magnetomotive-force and flux. 116 Riicker, on limits of regulation 21, 242 Bupp, on continuous-current transformation • • 727 Disc dynamo 480 Ryan, Prof, H. J. ,— Method of exploring commutator 66 On armature compensation 891 On synchronous motors. 21 On transformer-current curves • 711 8 fiSa7iuZX;a, on alternate-current motoxB. • 21 Salient poles 161 Sandwiched coils in transformer 701 Saturation, magnetic 121 In compound machine 282 Sawyer's inductor dynamo 10 Scucton's machine • 8 Disk dynamo 470 Sabers— Boosters 726 •• Commutator " coils 804, 805. Dynamos 488 Electro-plating dynamo 471 Mining motor 640 On motor commutation 515 On parallel running 766 Schellen, on theory of dynamo 4 SchSnenwerth plant 682 Schuckert <& Co, — Continuous-alternating transfonner 781 Dynamos. VAQM Self -^zciting alternators 594 Self-governing motors 522 Self-induction 5(K) Effect of, in synchronous running. 650, 660 In alternators 606 In circuit with transformer 710 Causes sparking 79 Self-oiling bearings 836 Self -starting synchronous motors 661 Sellers, Cowman— Designs for Niagara plant 686 On double lubrication 885 Sellon, on continuous-current transformation 727 Separate coils for excitation ; 52 Separately-excited dynamo 48, 5^ Theory of 1 79 Separation of losses 760 Series-connecting in ring armatures. , 276 Series dynamo 49 Characteristic of 197, 204 Efficiency of 188 Coupling of 765 Series lighting 445 Series motors — Chai-acteristics of 506 In transmission 509 Series-winding on motor 524 Series-winding not to be used with electro-plating dynamos 469 Shaft, design of 829 Shaping of pole-pieces 68, 88, 95, 160, 888, 891, 898, 894, 471, 552 Shell-transformers .... 702 Shortrcircuits in armatures 773 Shunt coil calculation 372 Heating of 870 Shunt current, calculation of 846, 370 Shimt dynamos. 50 Efficiency of 190 Coupling of 765 Shunt motor — ^Characteristics of 510 Constancy of speed 529 Shimt and series winding on motor 527 SiemenSf Alexander^ on torque of motors 508 On shunt dynamo 211 Siemens, Sir William — Efficiency of motors 491 Early researches 11, 16 On transmission of power. 490, 510 On shunt dynamo 21o On compound winding 57 Index. 827 pA0a tftem^iM, Werner tHm— Self-exciting dynamo 18 On armature reaction 86 Mining drill 646 Shuttle-wound armature 11, 88, 469 Invents name of dynamo 18 On transmiflsion of power 491 Siemerui — Alternating-continuous tninsformers 728 Alternators 609 Dynamo(old) 15,33,158,469 Dynamo (new) 404 „ characteristics of 196,201, 211 „ efficiency of 195 Homopolar dynamo. 475 Mining drill 546 On efficiency of motors. 491, 493 Law of 498 Winding 803 SiemeTis and Halske— Alternators 609 Brush-holder 825 Dynamos 163,802,867,897, 406 Electro-plating dynamos , 469 Ring dynamo 168 Silver, deposition of 783 Silver solder 805, 610 Sine curve 87, 62, 548, 550, 558, 569, 718 Sine-curve controversy 553, 569, 713 Single-phase motors 687 Sinsteden — Self-exciting dynamo 10 On theory of dynamo 19 Size of dynamo in relation to output 108, 840, 877 Size and output in relation to oooUng surface 876 Skin-effect 578 Slater Levins' regulator 745 Sleeve for armature 292, 832 Sliding contacts 5, 85, 312, 826, 384, 475, 585, 630, 673 Sliding rails 769 Slip in asynchronous motors 666, 675, 678, 679, 681 Slip in monophase motors. 688, 691 Slip-rings (see Sliding contacts) Slotted armature 343 Smithf Rev, F. J, — Method of measuring torque 185 On work-measuring machines 755, 756 Smith, Holroydy his brush 821 Smith, WilloughJby, on homopolar dynamo 476 5n6l/— Motors. 538 On horse-power of motors 531 828 Dynam(hElectric Machinery^ PAOK SneO,^ on size and output 886 South London Electric Railway plant 424 Spacing in armature winding 246, 256 Sparking— Caufies of '. 78,881,450,771 Prevention of 80, 881, 387, 897, 450, 514, 771 Specification of alternators 787 Of dynamos 785 Of transformer 789 Specific utilization of copper 868 Speed— Dependence of volts on 21, 45, 178, 846, 476, 549 Advantage of high 47, 869 Peripheral 109, 299,867, 476 Regulation of shunt motor 511 Relation of, to characteristic 205 (See aUo Critical speed and Slip) Sperry's arc-light dynamo 465 Spherical armature • 458 Spherical bearings 884,484, 628 Spiders 290, 382 Spiral winding 596 Split-phase motors 689 Splitting the phase 689 Sprague, F, J. — Motors 584, 586 On motor regulation 522 Spurious resistance 89 Square-root of -mean-square 554 Squirrel-cage rotor 667 Stafford and Eaves' electro-plating dynamo 470 Staggered poles 686 Stampings for cores 286,588,674,702 Stanley^ 8 constant-current alternators 640 Stanley-Kelly — Inductor alternators 641 Two-phase motor 686 Star connection of polyphase circuit 669 Starting — Dynamo 769 Of motors 509 Torque of asynchronous 680 Stator 668, 674 Statter'8 arc-light dynamo 465 Steam consumption, test of 762 Steel, magnetic properties of 128, 184 SteinmetZy on alternate-current wave form 712 On asynchronous motors 685 On polyphase motors 21 On loss by hysteresis 187 On synchronous motor 21, 659 Index. fAom Tables— Of data of Edison-Hopkinson dynamo 854 „ of Elwell-Parker continuous-current transformer. . . 725 „ of Kapp dynamo. 857, 358, 868 „ of Spra^e motors 535 „ of Westinghouse Co. 's street-car motors 543 Of effect of joints in wrought iron 180 Of efficiency test of Ooolden-WiUans plant 486 „ „ Snell motor 533 Of electro-metallurgical data 783, 784 Of flux-densities in dynamos 868 Of flux through various parts of Lahmeyer*s dynamo 158 Of heat waste at different current-densities 871 Of hysteretic constants 187 Of hysteresis waste 140 Of journal sizes 830 Of leakage coefficients. ...» 151 Of motor speeds and currents 488 „ torque and currents 607 Of pole width of alternators 589 Of shunt-motor speeds 529 Of symbols 169 Of transformer data 714 ,, relations. 720 Of triplex two-pole drum winding 274 Of values of B, fi and H in iron 126 Of winding of Lauffen three-phasers 629 ,, on Siemens plan 260 Of two-pole drum winding 247 Of two-pole symmetrical winding 265 Of four-pole drum-winding 269 Of eight-pole drum winding 268 Of lap winding 255 Of wave winding 255 Wire gauge and amperage , .780, 783 Tape {see Insulation) Tathani, on dynamometry 756 Teazer coils 56, 451 Teeth of armature cores. 14, 48, 99, 287, 843, 602 Produce eddies in pole-pieces 98 Temperature rise (see Heating). Terminal potential difference 202 Tesla, Nikola — High frequency 570 On polyphase work 665 Split-phase motors.. *. . . 689 Two-phase motor 671 Index. 831 PAGE Testing dynamos 751 , 768 Specification of 787, 789 Testing— For faults in annature 752, 778 Insulation resistance 752 Temperature-rise 752 Tests of car motor 542 Theoxy of compound-wound motors ' 522 Of continuous-current transformation 727 Of dynamo 19,22,45, 168 „ alternate current 573 0 series wound 188 yt shunt wound 190 ^ compound wound 224 Of electric motive power 489 Of monophase motors 690 Of polyphase motors 675 Of the synchronous motor 648 Of transformer 699,708, 719 Thickness of core-disks.. 284 Third brush for shunt coil 52 Th(ymp%(mj M, E., on armature distortion 69 Thempson, S. P., on armature exploration 68 Method of compensating armatiu-e 890 Thonuon, Elihu, on armature compensation 889, 891 On breadth of alternator coils 590 On continuous-current transformation 727 On dynamometric governing 749 Experiments with alternating current 687 His inductor 642 His open-coil dynamo 16 On transformer conductors 717 On constant-current transformers 717 Thomson-Houston — Dynamo 458 Transformer 714 Thompson^ James, on brake dynamometer 755 Thompson, Joseph J., on joints in magnetic circuit 129 On skin-eflfect 578 Three-dynamometer method 568 Three-phase alternators 599, 604, 627, 644 „ convertable to single phase 686 Combinations... » 664 Currents 600, 665, 670 Inductor alternator 644 Three-voltmeter method 568 Three-wire system, transformers for 718 Thrust bearings ^ 338 832 Dynamo- Electric Machinery. PAOS ThuT%i<m^ on Brush dynamo 458 Thury — Continuous-current machines for transmission, 736 Dynamos 442 Inductor alternators 646 Regulator 745 TimmtrmanUy A, H. and C, E., on radiatioi;! of heat. 376 Tooth (see Teeth). Torque of alternators 571 Of armature 96,100,103 Constant ' 749 Of asynchronous motors 676, 681, 685 Of monophase motors 691 Of motors 501, 503 Of synchronous motor 650 Traction motors 540, 545, 546 «* Trailing " polar horn 76,94, 383 Tramway generators 433 Transformers 694 Construction of 700 Continuous-current 724 Design of 715 For constant current 717 For insulation tests 752 Modem types 702 Polyphase 718 For three-wire systems 716 Specification of 789 Transformer-action of polyphase motor , 676 Transformer-cases, specification of 790 Transmission dynamometer 755 Transmission of energy 733 At high voltage 694 By alternate currents 647, 651 By polyphase currents. 668 Two-series motors in 509 Triplex-winding 273, 274 Trotter, A, P., on magnetic leakage 153 On motor regulation 530 Regulator 747 True watts 567 Turbo-alternator 625 Two-phase— Alternators 599, 634 Combinations 663, 670 Currents 600 Motors 661,666,671,673, 686 '• Tyne " dynamo brush-holder 882 Index. 833 U PAOK ITndeb^ttpb, sapport of armataxe in •• ••• 827 Unipolar dynamo • 6, 475 Units, connections between • 101 UnitBv magnetic 112, 144 VnusiUy on brake dynamometer •••••• • 755 ^ Vppenhom, on compound winding.. •••••• •••. 242 On homopolar dynamos. •••! • 477 Useful points in designing 8(t7, 681, 688t 078, 702, 715 Utilization of copper, specific • 868 V Tan 3faZ(26ren'« machine. • 10 Varley, CromtDeU F. 174, 701 His transformer • 701 Varley C, and 8. A.^ self -exciting machine 12 Var^, 5. ^//red, on compound winding.. •• 56 On homopolar dynamo 475 H is machines 12 Varley, F. H., his machine 12 Varley, O,, his machine 12 Ventilation of armatures.. .164, 292, 295, 878, 896, 408, 420, 452, 616, 628 Of field-magnets 878 Of transformers 708, 716, 717 Vertical-shaft dynamo. 412 Vibration and noise 295, 777 "Victoria" dynamo 276,285, 417 VincenVs multipolar drum 16 Virtual volts and amperes. • 558, 564 Voltage required in deposition 784 Volts lost in the armature 180 Volts, virtual 554 Volume of magnetizing ooiL •••• 871 Volume («e6 Output). Vulcanized fibre {see Insulating Materials). W Walenn^ on reversibility of dynamo... 18 Waltenhofeii, on theory of dynamo 20 Warburg, on loss per magnetic cycle. 185 Wasted power — In copper 847, 871, 761 In iron 187,140,847, 761 Waste of power at different current-densities. 871 Waterhouae^a regulator. 747 53 834 Dynamo-Electric Machinery^ PXOB WaildnSy his machine 8 Watt, the 200 Wattless current • 567 Wattmeter 568 Wave form {p,nd see Sine curve) • 549, 553 Of trausformer currents 712 Wave winding 596 Webber^ on motor generators at Chelsea 725 T^e&er, on laws of induction 19 On theory of alternate currents 573 On unipolar induction 475, 478 Weber, H. F,, on Lauffen transmission 742 Weber, the 144 Wedding, on alternate-current wave form 712 Weight of dynamos (see also Output), 405, 412, 416, 426, 429, 438, 444, 626 Of copper 416,626 Weishaeh, on power-measuring machines 755 Wenster(ym,---T>Ynaxno test of 764 Pierced core-disks 290 Weatinghouae Co. — Air-blast for cleaning 771 Alternator 583,602, 626, 688 Core-disks 288 Niagara alternators 688 Street-car motors 542, 544 Transformer 703, 714, 717 WestorCa dynamos 16, 160 Wheatatone, Sir Charlea— Motor 18 On self-exciting dynamo 13 Machines 9, 10 Use of electromagnets 9 Wheel dynamo 479 Wheeler, on parallel running 766 Whirls of magnetic lines 26 Widening of gap-space 379 Width of pole-faces (see Pole-pieces) Wiener'a data 339 Wi7(fe's Alternator 580 Dynamos 10, 11, 16, 48, 469 WUlan'a Grovemor 748 High-speed engines 426, 434 Willesden paper (see Insulating materials). Wilson, on retardation of magnetism 142 Winding of alternators 596 Of armatures 297 Of field-magnete 872,607,611, 621 Of Lauffen generator 630 Index. 835 <>AOB Winding of alternators— Of multiplex armatures 272 Of polyphase motors. 667» 678, 686 Tables 247,255,260,266,268,269, 629 Of transformers 700, 715 Relation of, to characteristic. 207 Triplex 278, 274 Wires («ec also Binding wires and Cores) 776 Wire-wound armatures 298 WormA de Romilly, on drum winding 15 iroocfs arc-light dynamo 465 Wood {see also Insulating materials) For distance pieces 286,804, 807 For wedges 602 For driving horns 296 WoolricKs machine • • • 8, 469 Work done by conductor in field • 104, 486 Bymotor 496, 501 Z Zbuner*s valve-gear diagram • • 551 Zicfc/er, on compound winding 242 Zinc — Cost of, for motive power • 485 Use of, for footsteps 152,854, 425 " coil frames 613 Zipemow8ky*8 Alternator .584, 611 Transformer 702. 