International Library of Technology · Scranton, International Textbook Co. · leaf 124
sizes of dynamos up to 100 horsepower. The ratio of diame- DYNAMO-ELECTRIC MACHINE DESIGN. 2499 ter to length may be taken asmachines, while for sizesabove 5 horsepower a ratioof 1.3 : 1 to 1.45 : 1 will befound to conform to goodpractice. Fig. 1387 shows awebbed pulley such aswould be suitable for… … FlG. 138?. BEARINGS.3748. Bearings for dynamos are usually made self-oiling, instead of being fitted with sight-feed lubricators. Aself-centering bearing with oil-rings is shown in Fig. 1388;which gives two views, one being a longitudinal cross-sectionand the other a transverse section through the…
Electrical engineering
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