The base is a block of wood two and one-half inches long, one and seven-eighths of an inch wide and one-half inch thick.
The field is fastened to the base by four small wood screws. The exact method of assembling the motor is probably best understood by studying the illustration in Figure 25.
FIG. 28.—The Bearings.
THE MANCHESTER MOTOR.
Those readers who have made the motors already described, are no doubt anxious to proceed with the construction of some models which bear a greater resemblance to the large motors commonly employed to furnish power.
Figure 29 shows a motor of the "Manchester" type.
The Field of this machine is made from a strip of heavy sheet tin, one-half inch wide and about six inches long, bent to shape and joined in the center of the bottom pole piece, just above the pedestal. It is best to cut the strip a little long and then reduce it to the exact length required after the bending operations have been finished. The illustration in Figure 30 shows the details and dimensions of the field.
The field should be bent into shape with the aid of a pair of pliers and a wooden form, in the same manner employed in making the motors already described.
