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Page 336 | Volume 1 | Chapter 22 | Armature Construction

3. Barrel winding;
4. Bastard winding;
5. Former winding.

Hand Winding.—The first windings were put on by hand, and proved objectionable on account of the clumsy overlapping of the wires at the ends of the armature, which stops ventilation

Figs. 369 and 370. - Evolute and
Figs. 369 and 370.—Evolute and "straight out" connectors. In small machines the connectors must be curved as in fig. 369, but in large machines, especially where the teeth are wide, they may be straight as in fig. 370. These connectors may take either of the following forms: 1. involute or evolute connectors—An involute is the curve drawn by the extremity of a piece of string which is unwound from a cylinder; 2, spiral connectors—These consist of double spirals, the commutator being usually connected to the junction of the two spirals. These connectors are also known as "butterfly" connectors.

and hinders repairs, while the outer layers overlying those first wound, bring into close proximity inductors of widely varying voltage. The method is still used in special cases and for small machines. Such a winding has rarely, if ever, been made with one continuous wire.


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