Small motors, transformers, electromagnets; a practical presentation of design and construction data for small motors, small low- and high-tension transformers, electromagnets, and induction coils (1920)
Stoller, Hugh Montgomery, Austin, F. E. (Frank Eugene), 1873-, Seeger, Edwin Wilbur, 1892- joint author, American Technical Society · Chicago, American Technical Society · leaf 297
In magnets of this type not only the outsidecylindrical surface of the coil is counted but also the inside sur-face, top and bottom. Exam-pie 29. Design a magnet of the type shown in Fig. 23 which willsupport a weight of 10,000 pounds. Assume 110,000 Unes per square inchin the area of contact and… … Fig. 23. Portative Electromagnet 72130000X1000012 100 000 000 =59.5 8q. in. 284 ELECTROMAGNETS AND COILS 45 This area is, of course, divided between the inner and the outer poles, and thearea of each will be 29.75 square inches. Consider first the inner pole. The areaof contact as determined above…
Electric motors · Electric transformers · Electromagnets · Induction coils
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