Wright, Mark R., 1854- · London : Longmans · leaf 238
ped bar of soft iron, roundwhich is coiled insulated copper wire.The electro-magnet is retained in itsplace by the bar e. The armatureof soft iron, a, carries the hammer, P.a is attached to its metallic supportby a spring that keeps it pressedagainst another spring, c.. The current enters by the… … Fig. 236. along a to the 230 Voltaic Electricity The current magnetises the electro-magnet; this attractsthe armature a, causing the hammer to strike the bell. Theconnection between a and c is then broken, and the currentceases; the soft iron electro-magnet is no longer magnetised,and therefore…
Physics
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