Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 196
the necessary weightof cast iron being 2 or 2.5 times greater, makes it not only clumsybut more expensive. For yokes, field-rings, bases, or other partsnot wound with wire, the extra circumference is not so objectionable.Often the increased weight is positively advantageous in givinggreater… … Fig. 171. Magnet-Yoke with Parts Bolted Together on Inside Ring permeabiUty of a given area of cast iron is only about one-half asgreat as that of an equal area of either of these other materials. Hence,in order to secure the proper surface of contact, the pieces of steelor wrought iron should be…
Electrical engineering
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