[Electric engineering.] . Fig. 9. machines are, however, frequently operated without anyrheostat, especially if they are worked at nearly full a recording wattmeter used to measure the total workdone by the machine. The current coil of this wattmeteris connected in series with the dynamo and lamps, and thepressure coil is connected across the terminals of the dynamoin series with the resistance r. IT. Armatures for T. H. Dynamos.—The old styleT. H. armature was nearly spherical in shape, but it was 14 ELECTRIC LIGHTING. 19 essentially of the drum type, because the wire was wholly onth
[Electric engineering.] . Fig. 9. machines are, however, frequently operated without anyrheostat, especially if they are worked at nearly full a recording wattmeter used to measure the total workdone by the machine. The current coil of this wattmeteris connected in series with the dynamo and lamps, and thepressure coil is connected across the terminals of the dynamoin series with the resistance r. IT. Armatures for T. H. Dynamos.—The old styleT. H. armature was nearly spherical in shape, but it was 14 ELECTRIC LIGHTING. 19 essentially of the drum type, because the wire was wholly onthe outer surface of the core and the coils overlapped. Theobjections to it were that it was difficult to wind, difficult L//76 Sfreef lamps. ^/? i O O O O O ?-?O-•©-•©©© > ( oooooo oooooo oooooo oooooooooooo^l OOOOOO OOOOOO OOOOOO OOOOOO OOOOOO > I OOOOOO OOOOOO
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