Electrical measuring instruments : grand prize Louisiana Purchase Exposition, St. Louis, 1904 (1904)
Leeds and Northrup Company · leaf 42
hout ironcore). Scale of original curve, i inch == 2 amperes. Curve TH is a power curve, with a positive and negative loop forevery half wave of the electromotive force and current. The power iszero when the curve is zero and also when the electromotive force is zeroas the curve shows. The negative… … 42 THE LEEDS & NORTHRUP COMPANY Plate II Curve I is tlie electromotive force of the same alternator giving thecurve of plate i. A condenser of 21 microfarads is joined to the ter-minals of the alternator, and this condenser current reacts on the arma-ture, strengthening the harmonics. Curve IT…
