The Elements of Electric Lighting: Including Electric Generation, Measurement, Storage and DistributionD. Van Nostrand, 1889 - 260 стор. |
Загальні терміни та фрази
acid alternate current ammeter amount ampere ampere-hour apparatus arc lamp arc light armature coils attached battery binding posts brass brushes C. G. S. units candle candle-power carbons cell charged commutator conductor connected construction copper copper wire current dynamo current flows current passes cylinder diameter difference of potential direct current disc discharge Edison elec electric current electric energy electric lighting electric resistance electro-magnet equal extinguished farad field-magnets filament heat hence high resistance incandescent lamps inch inclosed increase independent circuit induction instrument insulated interior lamp circuit length lines of force low resistance machine magnetic intensity main circuit ment metal method molecular motion movement negative number of lamps ohms opposite pair parallel peroxide placed plates platinum wires points pole-pieces poles position practical produced reduced result rotation segments shaft shown in Fig shunt spring strength sulphate temperature tion tricity tube varies vertical voltmeter volts wound
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Сторінка 71 - In the rotary movement of a ring-armntnre between opposite external pole-pieces, the lines of force, according to one theory, enter the armature-core and traverse the coils, producing an equal magnetic effect on every portion of each coil, interior as well as exterior. According to another theory, only the exterior portion of the coils cuts the lines of force; the interior portion, as well as that on the ends, being practically idle, serving only as a conductor of the electricity generated in the...