[Bubier], Edward Trevert, 1858- [from old catalog] · Lynn, Mass., Bubier pub. co. · leaf 97
through the line wire,back to the other ring, and the circuit is completed. Other forms of armatures can be designed foruse in these fields, a drum, or even a ring arma-ture with many segments in the commutator. Thefield winding may be made shunt, especially forrunning incandescent lamps. Even a… … Figure 8. Fig. 9 represents a simple contrivance for driv-ing by hand. A cast-iron frame, light but wellribbed, is secured to a board or table a few feetfrom the dynamo by two thumb screws. A wheel15 inches in diameter, 1 ^-inch face, driven by a
Electricity
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