ide of the finished armature ring and place it through the
opening in the field, then slip the bearings on the ends of the
shaft. If the holes in the bearing support should be out of line,
file them out to make the proper adjustment. When the bearings are
located, solder them to the supports, and build up the solder
well. Remove

[Illustration: The Bearing Studs are Turned from Machine Steel Two
of Each Length being Required]

the paper from the armature ring and see that the armature
revolves freely in the bearings without touching the inside of the
field at any point. The supports are then removed and the solder
turned up in a lathe, or otherwise finished. The shaft of the
armature, Fig. 4, is turned up from machine steel, leaving the
finish of the bearings until the armature is completed and
fastened to the shaft.

The armature core is made up as

[Illustration: The Assembled Bearing Frame on the Field Core and
the Armature Shaft Made of Machine Steel]

follows: Two pieces of wrought sheet iron, 1/8 in. thick, are cut
out a little larger than called for by the dimensions given in
Fig. 5, to allow for finishing to size. These are used for the
outside plates and enough pieces of No. 24 gauge sheet iron to
fill up the part between until the whole is over 3/4 in. thick are
cut like the pattern. After the pieces are cut out, clamp them
together and drill six 1/8-in. holes through them for rivets.
Rivet them together, and anneal the whole piece by placing it in a
fire and heating the metal to a cherry red, then allowing it to
cool in the ashes. When annealed, bore out the inside to 1-11/16
in. in diameter and fit in a brass spider, which is made as
follows: Procure a piece of brass, 3/4 in. thick, and turn it up
to the size shown and file out the metal between the arms. Slip
the spider on the armature shaft and secure it solidly with the
setscrew so that the shaft will not turn in the spider when truing
up the armature core. File grooves or slots in the armature ring
so that it will fit on the arms of the spider. Be sure to have the
inside of the armature core run true. When this is accomplished,
solder the arms of the spider to the metal of the armature core.
The shaft with the core is then put in a lathe and the outside
turned off to the proper size. The sides are also faced off and
finished. Make the core 3/4 in. thick. Remove the core from the
lathe and file out slots 1/4 in. deep and 7/16 in. wide.

The comm