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 231
connections may be readily detected. When this sparkingat the contacts is absent, the whole of the connections should becarefully examined and tested. Breaks in .\rinature Circuit.—If there be a broken circuitin the armature, as sometimes happens through a fracture ofthe armature connections, etc.,… … Fig. 725.—Sandpaper holder for commutator. The sandpaper is made fast on top by a clampand screw. The two face blocks are pivoted and adjust themselves to the commutator,and will fit any size of commutator. If it have four brushes, the lower block vnU go in be-tween the brush-holders. Oues. How may…
Electrical engineering
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