Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 219
eces ofmetal, both shaped at one end to the correct angle, to which thebrushes must be filed. One of the pieces of metal (the back part)has a groove sufficiently large to accommodate the brush, whichis clamped in position by the other piece of metal and a pinchingscrew. If the clamp be not supplied… … Fig. 711.—Jig for filing brushes to the correct bevel; used with copper brushes to fit them tothe commutator. In filing, the brush is fixed in the clamp, with the toe or tip projectingslightly over the edge of the clamp, and the latter being fixed in a vise,the brush is filed by single strokes of a…
Electrical engineering
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