Unique Battery Motor
A short while ago I made a little motor
as shown in the illustration. The armature
was a three-pole one from an old
motor and had the windings taken off. I
mounted the axle on which the armature
and commutator were fixed between two
metal uprights, and under the armature
put an electro-magnet from an old bell.
The brush was adjusted so that the little
screw on the commutator just hit it. To
make the other connection to the commutator
I put some small pieces of wire in
the screw holes so that they pressed
against the shaft.
The current coming from the battery
passes through the electro-magnet, upright,
axle, commutator, the brush and then back
to the battery.
JOHN B. MOORE
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