Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 209
the side of each arm,Fig. 201, are seen the seatingsand bolt-holes for attaching thecommutator-hub and the rimwhich supports the winding.In Fig. 202, which shows thecompleted core, the supportingrim and narrow ventilating ducts are visible. Ventilating Ducts. Armature cores, as already explained,… … Fig. 200. Construction of Armature Hub 181 172 DIRECT-CURRENT DYNAMO has been found necessary, in the large and heavy-duty types of to-day, to resort to means of ventilation, usually consisting of ductsvi^hich lead the air out between the core-disks. To keep the core-disks apart at these ducts, it…
Electrical engineering
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