Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 107
ected as shown, is laid alongside each and every turn of wire incoil b. Then current C-\-a flows down through b; current a flowsback alongside the wire of coil b; and the result is the same as if thecurrent a were subtracted from the current C-\-a, so far as the mag-netic action of the coil b is… … Fig. 87. Roller-Smith Portable Torsion Wattmeter the Siemens instrument, the current being led into and out of thefine wire movable (voltage) coil through the springs s and Si. Likethe Siemens instrument, it is operated by rotating a torsion headthrough the nut k, Fig. 88, until the tension of the…
Electrical engineering
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