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ELECTRIC MOTORS 295

required for the shaft. Bind the two halves of the arma-
ture together in the position shown in Figure 244. Bind
them with a piece of iron wire and solder them together.
The wire should be removed after they are soldered.

The Field Magnet is made by first cutting out a strip of
tin one-half by
‘ four a n d then
bending it into
the shape shown
in Figure 245.
The easiest way
of doing this with
accuracy is to cut
out a piece of
wood as a form, and bend the tin over the form. The
dimensions shown in Figure 245 should be used as a guide
- for the form.

Two small holes should be bored in the feet of the field

magnet to receive N o. 3 wood
"h
i. 47

'screws, which fasten the field
FIG. 247.—The Bearings.

1//
//

 
    

    

to the base.

The Bearings are shown in
detail in Figure 247. They are
easily made by cutting from sheet-tin. Two small washers,
serving as collars, should be soldered to the shaft as
shown in Figure 243.

The Commutator Core is formed by cutting a strip of
paper five-sixteenths of an inch wide and about five inches

 

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