Improvements relating to Pneumatic Tyres for Cycle and other Vehicle Wheels.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
.
Improvements relating to Pneumatic Tyres for Cycle and other
Vehicle Wheels.
We, JOHN HENRY WOODROFFE, and JOHN WILLIAM BERNARD WRIGHT, of New
John Street West, in the City of Birmingham, Manufacturers, do hereby declare
the nature of this invention to be as follows:-
This invention consists of improvements relating to pneumatic tyres for cycle
and other vehicle wheels, our object being to provide means for effectually pre-
venting puncture of such tyres when in service but without impairing their
resiliency.
Our invention comprises the placing of a specially formed guard between the
inner air tube and the outer cover or casing of the tyre.
We construct our improved guard in one convenient manner from a flat strip
of thin sheet steel which extends around the tyre on the underside of the cover,
and upon this flat central strip we thread cross strips of metal having widened
edges bent or curved to suit the curvature of the tyre cover.
The cross strip
edges overlap and lock each in position, forming with the flat central strip the
complete protecting guard which will effectually resist thorns, nails, or the like,
and prevent their piercing the inner air tube, whilst owing to the flexibility of
the guard due to its special construction, the resiliency of the tyre will be un-
impaired.
We preferably fill up the space between the upper surface of the flat central
strip and the adjacent concave face of the tyre cover, by canvas, rubber, or other
material attached to the strip or formed with the cover.
In the construction of a guard without side pieces we employ a flat metal
strip such as hereinbefore described and attach the same to a canvas, rubber, or
other like sheath having a convex upper surface to correspond with the concave
underside of the tyre cover, and preferably with a concave under surface to cor-
respond with the convex surface of the inner air tube. We thus maintain the
original flat formation of the metal strip and so preserve its elasticity.
Dated this 15th dow of Cantamhan
1907
Improvements relating to Pneumatic Tyres for Cycle and other
Vehicle Wheels.
We, JOHN HENRY WOODROFFE, and JOHN WILLIAM BERNARD WRIGHT, of New
John Street West, in the City of Birmingham, Manufacturers, do hereby declare
[Price 8d.]

page_text: the nature of this invention and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:-
This invention consists of improvements relating to pneumatic tyres for cycle
and other vehicle wheels, our object being to provide means for effectually pre-
venting puncture of such tyres when in service but without impairing their
resiliency.
Our invention comprises the placing of a specially formed guard between the
inner air tube and the outer cover or casing of the tyre.
to:
In the accompanying sheet of explanatory drawings to be hereinafter referred
-
Figure 1 is a plan of the central strip and Figure 2 a plan of one of the cross
strips for one form of our improved tyre guard or protector; Figure 3 is a plan
of the complete guard, Figure 4 an end section on the line a b Figure 3, and
Figure 5 an end section on the line-c d Figure 3.
Figure 6 is a plan representing another form of our improved guard.
Figure 7 is a plan of a further modification in the construction of our improved
tyre guard, Figure 8 an end section on the line of Figure 7, and Figure 9 an
end section on the line g h Figure 7.
Figure 10 is a sectional end view representing a guard without cross strips.
The same reference letters in the different views indicate the same parts.
We construct our improved guard in the form shown at Figures 1 to 5 inclu-
sive from a flat strip as A, preferably of thin sheet steel, which extends around
the tyre on the underside of the cover, and upon this flat central strip we thread
steel cross strips B having widened edges bent or curved as shown at Figures 4
and 5 to suit the curvature of the tyre cover. The cross strips are arranged alter-
nately on opposite sides of the central strip and their edges over-lap and lock
each other in position, forming with the flat central strip the complete protecting
guard which will effectually resist thorns, nails, or the like, and prevent their
piercing the inner air tube, whilst owing to the flexibility of the guard, due to
its special construction the resiliency of the tyre will be unimpaired.
We preferably fill up the space a¹ (Figure 4) between the upper surface of the
flat central strip and the adjacent concave face of the tyre cover C (represented
by dotted lines), with canvas, rubber, or other material attached to the strip or
formed with the cover.
With the guard shown at Figure 6 the central strip A¹ is narrower than in
the preceding case whilst the cross strips B¹ are of a somewhat different shape.
We sometimes make the cross strips from two or more plates, one at least of
which is clamped or secured to the central strip. With the guard shown at
Figure 7 each cross strip is made up from a pair of plates as B2 B3, one of which
as B3, has its edges clamped or pressed down upon the central strip as illustrated.
We sometimes make the central and the cross strips of our improved tyre
guards or protectors from linoleum or specially woven or prepared canvas, or
other suitable material instead of from steel as hereinbefore described.
In the construction of a guard without side pieces we employ a flat metal or
other strip such as hereinbefore described, and attach the same to a canvas, rub-
ber, or other like sheath having a convex upper surface to correspond with the con-
cave underside of the tyre cover, and preferably with a concave under surface to
correspond with the convex surface of the inner air tube. By such arrangement
the original cross section of the guard will as in the former cases, be maintained
and the resiliency of the tyre unimpaired. Such a guard is represented at
Figure 10 where A is the metallic or other strip; the outline of the sheath is
shown by dotted lines.
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. A guard or protector for the pneumatic tyre of a cycle or other vehicle wheel

page_text: so arranged as to maintain its original cross section, substantially as and for the
purpose described.
2. In a guard or protector for. the pneumatic tyre of a cycle or other vehicle
wheel, the combination of a metallic or other central strip with cross strips
arranged alternately on the opposite sides of the said central strip, substantially
as described and as illustrated.
3. In a guard or protector for the pneumatic tyre of a cycle or other vehicle
wheel, the combination of a metallic or other central strip with cross strips
arranged alternately on opposite sides of the said central strip, such cross strips
being each formed from two or more parts one at least of which has its edges
clamped or pressed down upon the central strip, substantially as described and
as illustrated.
4. The construction and arrangement of parts forming the improved guards
or protectors for the pneumatic tyres of cycle and other vehicle wheels, substantially
as described and as illustrated.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., &
13, Temple Street, Birmingham, Agents for the Applicants.