282 



A KM A 77 'in: ( 'OXST/ft ' 



Fig. 335 shows the method of making the wire lie fast and 

 straight in the slot, by means of a wooden wedge, after which the 

 wood buttons are turned over to retain the wires firmly in place 

 during the subsequent operations. 



Fig. 336 shows the wires being cut to the required length after 

 the coils are wound complete on the form. 



Fig. 337 shows the first forming operation ; the pieces which 

 held the ends of the coils are removed, and the ends are being 

 given a quarter twist by hand. 



Fi. 334. First Turn and Insertion of Insulation. 



Fig. 338 shows the coil being spread, that is, stretched out to 

 the right width to cover the correct pitch of the armature slots. 

 It will be noted that the end twists are still held during this 

 operation to prevent them from being deformed. 



Fig. 339 shows the finished coil being removed from the form. 

 I,ead or soft iron clips are put on the coil at intervals to retain 

 its shape until the taping process, during which they are removed. 



II. A second way is to wind the coil over two pins in the 

 manner shown in Fig. 340. After the coil is wound, and the wires 

 held fast together with metal clips (thin strips of lead, tin, or 

 iron), the coil is dried in an oven, and then dipped while hot in 

 an insulating varnish and oven-baked until dry. 



