National Geographic : 1923 Oct
a' WINDING ARMATURES FOR MOTOR-CAR GENERATORS Until recently it has been necessary to wind armatures with these comparatively simple hand machines. Tokeep thetension uniform with the constant starting and stopping of the wire reels of the type shown in the left foreground was apparentlyanunsolvable problem. Anew machine has just been perfected, however, which automatically winds the armatures, one girl being able to do the workof four, with none ofthestrain involved. The wire is drawn on a 15-pound tension.