Practical electricity, with questions and answers (1901)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 82
in each half of the yoke. The area of the air gap is not the whole area of the poleface, for with an air gap 1-16 inch long* there is a bunch-ing of the lines to a greater or less extent, as shown inFig. 33. It is important to calculate the areaof the air gap carefully, for on this willdepend the… … Figure 33 Bunchingof magneticlines in air gap. There are 48 sloits in a disc 7^2inches in diameter and each slot is .230inches wide; the circumference of thedisc is 23.55. Each slot and toothtake up 23.55 divided by 48 equals .491.This leaves the top of the tooth .491— .230 equals .261 wide. The…
Electricity · Electric generators
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