New Ulm review. (New Ulm, Brown County, Minn.) 1892-1961, 1921-07-20
INGENIOUS DEVICE
BEING MADE HERE
VIM. AAB SECURES PATENT ON
EXPANSION PISTON PIN
FOR MOTORS. a
MANY ARE ALREADY IN USE
AND GIVING EXCELLENT
SATISFACTION.

development OF gasOhne-prOpelled
motors, one of the most difficult mat
tiers that have confronted the rapair
man, as we'll as the manufacturer of
motor vehicles, is the elimination of
the noise fhmiliarly called knock"
in the motor, caused by a loose OF i'm
properly fitted piston pin. This
ve1ing problem, which has defed
many of the leading engineers and
mechanics of the country, has now
been solved, and, it remained for a
New William Aab Of the New
Ulm Manufacturing Co.-to invent
device to overcome the trouble.
Bill's Expansion Piston Pin.
Mr.. Aab has christened his ingenious
device "BilPs Expansion Piston Pin,"
being too modest to divulge the identi-
ty Of the inventor by bestowing upon
it his surname, as many producers OF
new devices do. One of the marvellous
features of this adjustable expansion
piston pin is its utter simplicity and
mechanic or handy-man can install it
and do better job than an expert
mechanic can do with the ordinary
standard pin. Mr.. .Aab guarantees
that his invention will absolutely and
positively eliminate motor trouble
usually caused by a defective, i'm
properly fitted or loose piston pin,
and there are no strings tied to his
guarantee, provided ordinary care is
used to prevent improper or insufficient
fabrication.
Obtainable for All Motors.
Bills expansion piston pin is made
in sizes and shapes FOR all makes and
types of automobiles, motorcycles,
trucks, tractors and gasoline engines.
Special sizes to fit odd-sized pistons
can also be furnished according to
specifications or samples submitted,
and any desired oversize can also be
obtained, no extra charge being made
Tor the latter. Thus the owner of an
old model auto, motor cycle, truck,
tractor or gasoline engine need not
discard his machine ior want of a
suitable piston pin.
Principle of Construction.
There is large hole running length
wise through Bills expansion piston
pin, being located in such a position
as to give the tapered expansion pin,
by means of which the diameter dimen-
sion of the device is regulated and adj
justed, an opportunity to expand the
piston pin by sele-contained spring
action, as the longitudinal hole is close
to the edge of the piston pin opposite
the expansion pin hole. Therefore,
the principle of construction, while
simple in the extreme, is very effective
and provided an expansion piston pin
that is perfect in every way.
Bills expansion piston pin is split
lengthwise through the thick part,
which contains the adjustable tapered
expansion pin. This tapered pin is
seated the entire length Of the, piston
pin, making solid bearing through
out. The split in the expansion pin
also allows for better fabrication, thus
reducing wear to minimum.
Improves With Use.
Another big feature OF Bills expan-
sion piston pin is the fact that alter
1t has become seated In the piston, a
second adjustment will make the bear
ing last twice as long as the ordinary
piston pin. AS every mechanic knows,
when standard piston pin has been
in use for any length of time, the sur
face becomes worn smooth and the
piston hole is, as a general rule, also
worn smooth, as we'll as trife too
large. This condition makes the stand
ard pin tit too loose, causing the vexing
knock" in the motor, so that the
piston pin must be discarded.
VIII Outlive Piston.
Bills expansion piston pin, being
adjustable, does away with this trouble
and expense. It will outlive the
piston itself, as it can be expanded
repeatedly, giving absolutely salts
factory service. Another advantage
of the expansion feature of Mr.. Aab's
invention is that adjustments can be
made to the smallest fraction of one
thousandths of an inch and that this
adjustment is absolutely under the
control of the mechanic who instal,s
the piston pin. Changes in this ad-
Justment can be made at any time if
found necessary.
Attractive Folder.
The New Ulm Manufacturing Co.
has issued very attractive folder, a
product of the Review printery, ex-
planning every detail Of Bills expan-
sion piston pin and the method Of
fitting and installing it. Copies Of
these folders will be mailed to garage.
men and others interested in the device
upon request. A large number Of
Bills expansion piston pins are already
in use and giving universal satisfactory
to the owners Of the motor vehicles in