Los Angeles herald., 1907-10-09
LOCAL CONCERN TO
EXHIBIT AT SHOW
ANTI-oAk COMPANY iNvENTs
NEW TREAD
Eighth National Automobile Display
VIII Contain Several Features in
New and Non-PuncturabIe
Tires

NO feature OF the eighth national auto
mobile show, which opens in Madison
Square garden November 2, will be of
more interest to experienced motorists
than the numerous exhibits of monde
fiating" tires and tubes. There is hardly
motorist today who is not continually
asking whether there is really good
"non-defiating' tire upon the market
When 1t is considered that several hum
dred patents have been taken out during
the past few years 1t would be strange
IL there was not one tire which knows no
blowout" 1t is almost impossible to
classify the different ideas of inventors
of non"puncturable, mon Indicating" pneu-
matte tires, yet a perusal of the different
schemes shows that the more practical
seem to be subdivided into two distinct
classes. One of them is what might be
termed an impenetrabe tread and the
other Is filler for the inner tube The
filler idea is again subdivided into two
classes, in one of which permanent
substance" gives the effect of resident
cushion tire and another has a filler
which acts as a sealing substance, imme-
diately stopping any puncture which may
penetrate to the air chamber.
One of the most interesting of these
"non-def1ating" schemes is found in the
Dow tube, which appears to have met
with remarkable success. There is no
secret connected with the Dow filler 1t
is composed of nothing but flour paste
combined with ordinary feathers. We all
remember how our grandmothers used to
twist a piece of rag into the hole of the
respected family dishpan and thus eff
fectually put a stop to the leak
This Is in substance what Dow does
He manufactures fine inner tube of pure
rubber which is doubled about half way
around, and into this double section he
places the Dow filler of feathers and
paste. The tube is then placed within
the shoe just the same as any other tube
and the tire is inflated with air in the
regular way.
The result is that when nail or piece
of glass is withdrawn from the shoe the
feathers Immediately force their way into
the wound and the tire is permanently
repaired.
Experiments Show Worth
Experiments have shown that hundreds
of nails or spikes may be driven into the
Dow tubes and after they are withdrawn,
either Immediately or following a run Of
hundreds of miles, the mending substance
works most effectively.
Another non-deflating" tire which will
be on exhibition in the garden is the in
vention of A. B.. Shaw. In the Shaw sys-
tenn layer of plastic sealing compound
composed of melted rubber and asbestos
fibre, is placed on the tread Of the inner
tube. This is covered by concentric
layer of rubber. When wholly assembled
the tube Is placed in a vulcanizer and
cured under $50 degrees of heat, forming
a unit whichis ready for use.
When the puncture occurs and after the
puncturing instrument has been with
drawn the pressure of air in the tube
forces the sealing compound together,
making tight plug. The sealing action
Is automatic, and Mr.. Shaw claims that
the most serious puncture is permanently
repaired WITHOUT running the car off the
road or without hammering the shoe in
any way in order to force the compound
into the wound.
Another exhibit at the garden will be
that of the Hewmastic tube filler. which
is rubber-lke substance introduced into
the tube through the valve and taking the
place of air. When this substance is
pumped into the tube the tire is inflated
to its full capacity, as it would be with
air. The tire Is then allowed to stand
and the Hewmastic sets permanently. 1t
is claimed that large sections can be re-
moved by the force of impact against
stone or glass without any way affecting
the residence of the tire. Orrell A. Par
ker is the inventor and the president of
the Hewmastic Tire company.
In addition to these various compounds
and tube filters there will be on exhibit
tion several non-puncturable Shoes ana
treads. One of them is the wordsworth,
which is a tread made of chrome leather
and steel. Chrome leather is made by an
acid can process which it is claimed so
strengthens the fibre that 1t cannot
stretch or crack, but at the same time re-
mains soft and pliable under all con-
ditons.
Another non-puncturable leather shoe
will be exhibited by the Anti-Oak COM
pany of Los Angeles This tread has not
been exploited to any great extent in this
part of the country, but 1t Is very well
known in the west, where 1t has been
manufactured for some time. The COM
pany behind the invention manufactured
anti-oak harness leather, which is used
in the alkali district in the west, where 1t
is said no other harness will last any
length of time. The secret of the tough
ness Of this tread lies largely in the tan
ming of the leather. No bark Is used In
the process, and 1t is also claimed that it
is not affected by oil, heat, lime or water
or any element which usually destroys
leather. Any tube may be used with this
shoe which contains three thicknesses of
leather reinforced on the inside and pro-
tected on the outside by steel studs.
a