Los Angeles herald., 1910-09-25
METAL PROTECTED
TIRE IS FAILURE
English Invention Told of by Con-
sui Is Declared to Be of
Little Value
TENDENCY TO CREEP ON RIM
Puncture Proof Device Thought to
Result in Wearing Out
of the Castings
TENDENCY TO CREEP ON RIM

In a recent report of Benjamin Leeds.
a United States consul in England, is
mentioned the invention of an Eng
lishman Of what would appear to be a
punctureless tire, which he describes as
follows:
Tt is composed of an inextensible
heavy canvas lining, the crown being
packed with punctureless material
and placed between the outer cover and
the inner tube of the ordinary pneu-
matte tire. The lining is so made as to
cause low pressure on the tread and
to more nearly equalize the pressure
on the inner tube. The lining is the
thickest at the crown and tapers to a
feather edge near the rim. The exter-
nal appearance is like the ordinary
tire. The inventor has given 1t dras-
tic tests. He made several gashes and
cuts on the outer cover of the tire
through to the patent lining, and with
these has driven his car 500 miles
without a puncture or the necessity of
repair to the tire, although wheels on
the same machine fitted with other
tires had the usual difficulties. Other
tests on heavy cars without the special
gasheS have been equally satisfactory.
IAN inspection of the invention i'm
presses one with its simplicity, and the
onstrated that 1t is O. great develop
ment in tires used for automobiles.
Apparently a simple and practical So
luton of the ordinary tire trouble has
been found. The invention is patented
in the United States and England"
NOT A SUCCESS
A careful analysis of the above
statement made by Consul Leeds brings
us BADLY to the statement why an
inside lining or protector with metal or
puncture- proof material is unsatisfac-
tory" and therefore to the expert
encved automobile tire men Is not feas-
ible.
First. There is a vast degree of re-
sistance to an automobile tire, for
when the wheel Is revolving in one di-
rection the tire itself has a tendency
to go directly in the opposite direction,
which causes it to creep on the RIM"
and this has been proved to be prevent
ed only by the patented invention.
Second An inside tire protector with
metal or puncture-proof material in 1t
makes an auto tire much heavier, and
must clearly make more resistance to
the tire.
For example, in taking a string and
attaching a weight of any kind to the
end of the string, then whirling it in
the air, the faster the weight is whirled
the greater is and must be the strain
on the string. This same thing must
apply to an automobile tire. So when
the tire revolves the extra weight
which the protector has throws the
strain on the carcass of the tire.
This, and the friction which is caused
when the tire comes In contact with
the surface of the ground, causes 1t to
chafe and break the side walls at the
edge of the wearing surface Of the tire.
CHAFES SURFACE
This will not be noticed for the first
few hundred miles, but after the car
has gone 500 to 1000 miles it will be
found that the protector has been
chafed through to the 1oetal or the
puncture-proof material, and the fabric
Of the tire broken and chafed through
at least two plies at the edge of the
wearing surface on the inside from the