Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 319
Fig. 195. The diagram (Fig. 195) shows such a commutator. Itconsists of two brass springs, having ivory buttons on theirends. When at rest they press upwards against two metal I EARTH LINE —ft LINE. TTY& BATTERY -T BATTERYa DEPRESSED … — BATTERY Fig. 196. + BATTERYb DEPRESSED studs in the metal cross-piece. When either is depressed, itis released from contact with this cross-piece, but presses onone of the two metal studs on another metal cross-piece, chap, v.] Electro- Magnetism and Dynamics. 301 which passes under the ivory…
Electricity
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
