International Library of Technology · Scranton, International Textbook Co. · leaf 457
the machine is of large size, it becomesdifficult to cast the field and bed together, and the construc-tion shown is usually adopted in such cases. The field isusually set down into the bed as shown, as this lowers thecenter of gravity of the machine and tends to make it runsteadier. The distance… … CURRENT APPARATUS. 2823 continuous-current machines; it is made hollow and providedwith ribs to ensure stiffness. The thickness of metal in thebed will vary from about ^ in. or f in. up to 1^ or 1-|- in. formachines varying in size from about 50 K. W. to 500 K. W.Self-oiling bearings of the ring…
Electrical engineering
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