Great facts : a popular history and description of the most remarkable inventions during the present century (1860)
Bakewell, Frederick C. (Frederick Collier), 1800-1869 · New York, D. Appleton and company · leaf 191
num, rests upon the stage, and is shifted from side toside by the pendulum. In these movements the goldpoints touch and slide over the gold studs in the stage,and thereby make and break contact with the voltaicbattery, and alternately send and interrupt an electriccurrent through the coil of wire.… … 176 GREAT FACTS.. in G, As tlie pendulam approaches the end of itsswing, it pushes the movable bridge away from thegold studs on wliich it rests, and thus breaks connec-tion with the voltaic battery, and the pendulumdescends unrestrained by the attractive force of themagnets. As the pendulum…
Inventions
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