Mica Insulator Company reports gratifying demand for commutator rings

BUSINESS.

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The Mica Insulator company of New York, Chicago and London, manufacturer of Micanite materials for high-grade insulation, reports a gratifying demand for its commutator rings. It makes a specialty of manufacturing molded insulation and is now turning out, for some of the large manufacturers of electrical machinery, molded rings all in one piece. This pattern of ring is the most difficult installation to manufacture. But the ring, as it comes from the machinery of this company, is said to be as perfect as a stamped piece of steelware, and has the same metallic ring. Another form of insulation of which this company has made a specialty is the armature trough or slot, which is now in use by many of the manufacturers of motors for crane work and by those who require a heavy insulation which will stand at very high voltage. While this form of insulation is a trifle more expensive than the common red paper and mica, yet those concerns who manufacture machinery which receives such rough usage have found it necessary to get the best possible insulation for their armatures.