Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 205
iron sheets). The wires w are of copper. Between thearmature iron and the pole piece on either side is an airgap of half an inch. 206 ELEMENTARY ELECTRICITY The magnetic circuit is through 2 X 14 = 28 plus12 = 40 inches of steel casting. Through 10 inches ofsheet iron, and one inch of air gap. The… … Pig. 102. The Magnetic Circuit of a Small Motor. The flux required is 1,800,000 lines. How many am-pere turns must the bobbins B contain ? From the laboratory connected with the factory he hasobtained a table as is given in Lesson 13. Ampere TurnsRequired per Inch for Different Densities.He figures…
Electricity
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