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 342
ded that it can be moved in thatone direction only. To the shaft e is likewise secured an arm g,forked at one end and counterweighted at the other. Between theextremities of the forked ends of the arm g is another shaft h, onwhich there is a small pulley and to which is attached the needle ithat… … Fig. 9. Whitney Hot-Wire VoltmeterCourtesy of Roller-Smith Company 306 ELECTRICAL MEASUREMENTS U The arms are springy and serve to keep the silk fibre taut. Thecurrent to be measured flows through the wire a only, entering andleaving as indicated by the arrows. Evidently, when a is heatedby the…
Electrical engineering
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