English: Text from original page: Figure 248: Early form of Gramme ring armature, the core being shown cut through, and some of the coils displaced to make it clearer. The core, F, consists of a quantity of iron wire wound continuously to form a ring of the shape shown by the section. Over this is wound about thirty coils of insulated copper wire, B C D, etc, the direction of the winding of each being the same, and their adjacent end connected together. The commutator segments consist of a corresponding number of brass angle pieces, m n, which are fixed against the wooden boss, o, carried on the driving shaft. The junction of every two adjacent cells is connected to one of the commutator segments, as shown at n.