International Library of Technology · Scranton, International Textbook Co. · leaf 238
ng is a stationary soft iron cylinder C, supported in placeby a screw J/passing through a lug on the brass plate B.This cylinder being of less diameter than the openingthrough the pole-pieces, there is left a narrow gap betweenthe pole-pieces and the iron core, as shown. The lines offorce from the… … Fig. loas.aluminum or thin copper bobbin, which is suspended verti-cally between two delicate jeweled bearings. Two flathorizontal spiral springs 5, 5 oppose the tendency of thecoil to rotate, and at the same time conduct the current tothe suspended coil. A thin aluminum pointer P, attached at…
Electrical engineering
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