Electricity for everybody; its nature and uses explained (1895)
Atkinson, Philip · New York, The Century Co. · leaf 129
clapper to strike thebell. This attraction pulls thespring away from the screw.opening the circuit at thatpoint, and interrupting thecurrent, and the magnet beingthus demagnetized, the attrac-tion of the armature ceases,and the spring flies back intocontact with the screw, pullingthe clapper away… … Fig. 49. spring can be adjusted by thescrew to the strength of the mag-netizing current. CHAPTER V.Dynamos. Evolution of the Dynamo.—It was shown in thelast chapter that magnetism can be generated by elec-tricity, and electricity by magnetism 5 and that by themechanical movements of the poles of a…
Electricity
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