Kirkman, Marshall M. (Marshall Monroe), 1842-1921 · New York and Chicago, The World railway publishing company · leaf 21
cal balance is soperfect that no sparks should be seen at the brushes.The armature is held in place on the engine shaft byone screw which can be easily taken out if occasiondemands. The brushholders are fixed, and thebrushes can be taken out and replaced without changing the tension of the springs.… … LOCOMOTIVE APPLIANCES. 13 The mica between the copper strips of the com-mutator should always be a trifle below the surface.If it gets too high, file it down with a small file. Donot get it too low, as it will collect dirt, etc., and causea short circuit. Be sure and have the brushes fit perfectly…
Locomotives
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