An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 235
<^*L¥=ii … Fig. 141. — Field magnet of a smallold-style two-pole machine. Fig. 142. — Field magnet of smallmodern two-pole machine. through the armature, the poles are arranged to embrace thearmature. These expanded pole pieces are called pole shoesand the whole of the magnet frame is called the field of…
Electricity · Magnetism
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
