FIG. 25.—The Simplex "Overtype" Motor.
The detailed dimensions of the field are shown in Figure 26. It is made by cutting out a. strip of tin five-eighths of an inch wide and five inches long. This strip is then bent into the shape shown in Figures 26 and 27. This form of field is really very similar to that shown in Figure 15 except that the two feet are omitted and it has been turned upside down. The method of making ft is the same.
FIG. 26.—Details of the Field Frame for the "Overtype" Motor.
The field should be wound with either No. 25 or No. 26 B. & S. Gauge double cotton-covered wire. It should be carefully prepared for winding by a strip of shellaced paper around each of the two straight parts of the field magnet where the winding is to be placed. Then proceed with the winding in exactly the same manner as in the case of the field shown in Figure 15.
The armature used is of the the three-pole type and is exactly the same as that shown in Figures 20, 21 and 22.
FIG. 27.—Showing how the Field is Wound.
The bearings will have to be made much higher on account of the armature being higher than the base. The details of the bearings are shown in Figure 28. They are cut out of sheet tin. Care should be taken to make them accurately so that the armature will be in the proper position when the motor is assembled.