Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U. S. seacoast defenses .. (1904)
United States. War Dept · Washington, Govt. print. off. · leaf 54
Fig. 45 is a 4-pole, 20-coil, ring, fourwindings through arniatnre, makingits resistance between poles = -j^ ofthat of the single winding. By con-necting each bar of the conimiitatorwith the one opposite, two brushes90 apart will be sufficient. 2. An armature winding is more readily followed by…
Electric machinery · Searchlights · Coast defenses
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Il terzo [-qvinto] libro ... (1551)](https://img.insideoutlibrary.com/img/200/ia-ilterzoqvintolib00serl-28-41.webp)
