The Idaho Republican. [volume] (Blackfoot, Idaho) 1904-1932, 1920-04-09
P0CATELLO AUTO
SHOW ATTRACTS
MUCH ATTENTION
Many Beautiful Exhibits
Fill Technical Build
ing With Interested
Spectators
NEW FEATURES
Novel Accessories Are
Shown in Connection
With Show

The auto show at Pocatello is op-
Grating this week with a good at
tendance. 1t is in the gymnasium at
the technical institute and and an
admission fee of SO cents is charged
for the afternoon and evening show.
There are amusement features such
as vaudeville and dancing for the
evening. 1t closes Saturday night at
midnight. /
Persons visiting the auto show
should inspect the Lightning Change
rim for auto wheels. 1t is jointed
rim that kinks and lifts right out Of
the casing. 1t is set into the casing
again when repairs have been made.
The operator steps on the kink In
the rim and it is ready to put on the
car again. All the hard work Of
putting the casing over the rim and
of getting the casing off again, when
repairs have to be made, are saved.
r. c. Carnell of Blackfoot has Sc
cured the agency for this Lightning
Change rim and will probably have
them on sale soon.
A new kind of spark plug is on
hibit that sells for $3.50 each, and
is so constructed that when the vita
part burns out new piece can be in
serted at cost of 10 cents and per-
son has new spark plug.
A new crank shaft for engines has
been designed and one of them is on
exhibit at the auto show. The shaft
is so evenly balanced by the addi-
tion of special weights, to offset the
weight of the piston rod that it runs
perfectly smooth. There is none of
the centrifugal force drawing out.
ward and away from the center Of
the crank shaft, such as there is on
those not made by this pattern. The
principle of centrifugal force, the
tendency of all particles revolving to
fly away from the center, has been
taken care OF in the construction OF
this shaft. A simple demonstration
of the principle is seen in the use of
the slingshot, or taking any weight
attached to swing and swinging it
around in a circle. The tendency is
for the weight to fly away from the
center, or if a person takes string
and holds one end of it in each hand
with a button at the center, and
starts it to revolving, it revolves like
a crank shaft. The tendency OF the
button is to fly away from the center.
The tendency of the crank or the
heavy matter in the crank shaft is to
fly away from the center and where
there are several cranks on one shaft
those near the center bend out the
most from the center and the wear Is
greater on them. When we speak of
a solid crank shaft bending out at
the center, we do not mean that 1t
bends out enough to be seen by the
naked eye or to be measured, but
under very high velocity it does bend
out some as shown by the greater
wear on the crank near the center Of
the shaft. Fine tests have proven
that this centrifugal force and the
bending outward are sufficient to
overcome the power applied to the
shaft, and it reaches point in high
speed where the speed can not be re-
duted. When the shaft is SO con-
that it forces balance and
the weight Of the pistons is perfectly
ta'anced, by the weight on the op-
posite end of the shaft, then the same
amount of power applied in revolv-
ing it will make it gain higher
speed. And it will gain speed that
the unbalanced shaft can not be op-
Grated at under any amount Of power
that is applied to it.
The wear on the perfectly balanced
shaft cannot be discovered arising
rom centrifugal force.
-sfA