Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 222
Fig. 192.—Thomson Inclined Coil Ammeter. mounted with its axis inclined to the horizontal. Through thecentre of the coil is passed a vertical shaft mounted betweenjewel centres and carrying a pointer at its upper end, A smalliron vane, A, is attached to the shaft at an angle, and the movable … is controlled by the two flat springs, S. When current is passed throughthe coil the vane tends to turnagainst the action of the springs,so as to become parallel to thelines of force indicated by thedirection of the arrows. Theturning of the shaft causes thepointer, P, to sweep over thescale. The…
Electricity · Magnetism
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