Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1194
ype are generally used^ althoughthe open coil type of armature is employed on some con-stant current arc light generators. This type of armatureis open to the serious objection that the sparking at thebrushes is excessive, and some special means must alwaysbe provided to reduce it. Gramme Ring.—The… … Fig. 512 The various coils are wound on separately, the wire beingcarried over the outside of the iron core, then through thecenter- opening and again around the outside of the core,this operation being repeated until all the wire for thatindividual section is wound on. The adjacent coil is…
![An illustration from The Mason Machine Works, Taunton, Massachusetts, U.S.A., inventors and builders of cotton machinery : Founded 1842 ; Incorporated 1873 ; [Catalogue] (1898)](https://img.insideoutlibrary.com/img/200/ia-masonmachinework00maso-68-24.webp)