High frequency apparatus, design, construction and practical application; a practical treatise for electrical engineers, electricans, physicians, students and experimenters (1920)
Curtis, Thomas Stanley · New York, Norman W. Henley publishing company · leaf 38
nsformer is known as an open core instru-ment because the magnetic Unes of force set up in thestraight iron core must reach around through the air asshown in Fig. 3 to complete the magnetic circuit. A modi-fication is shown in Fig. 4 which illustrates a method bymeans of which the windings of the… … Fig. 4.—Showing principle of closed core transformer. Lines of force p:.ssthrough the closed magnetic circuit instead of through the air as in Fig. 3 There are many modifications of the closed core trans-former, all of which have merits peculiar to the uses towhich they are put. For lighting and…
Electric apparatus and appliances
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