PROVISIONAL CITICATIVA Improvements in Pneumatic Tyres, particularly applicable to "Single-tube" Tyres.
Year: 1896

page_text: Date of Application, 7th July, 1896
Complete Specification Left, 7th May, 1897-Accepted, 12th June, 1897
PROVISIONAL SPECIFICATION.
PROVISIONAL
CITICATIVA
Improvements in Pneumatic Tyres, particularly applicable to
"Single-tube" Tyres.
I, WILLIAM TATTERSALL, of 51, Wellclose Terrace, Leeds, in the County of York,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in pneumatic tyres particularly applicable
to single tube tyres, and its primary object is to enable the interior of the tube to be
readily inspected for repairs or the like.
For this purpose I divide the walls of the tyre more or less all round the middle of
the interior periphery. Along each edge of this division I form an annular groove
the concavities of which are towards the outer periphery of the tyre and their free
sides or edges which are adjacent to each other are soft and pliable. When the tyre
is inflated the internal pressure forces these soft and pliable sides together and thus
forms an air-tight joint. Instead of making a groove along both edges of the joint it
may only be formed along one edge and a plain lip or projection formed along the
other edge. These grooves may project externally and lie in a groove or recess in
the rim or they may be more or less within the tyre, in which case they may only
consist of inwardly projecting lips. Instead of open grooves tubes may be employed
having perforations opening into the interior of the tyre.
The walls of the tyre may be shaped or moulded so as to naturally assume an
annular and tubular form and retain this form under internal pressure.
Instead of making the joint round the inside of the tyre it may be made around the
external periphery. When this is the case internally projecting lips are formed
around each side of the joint adapted to bear against the internal sides of an annular
"U" shaped bearing or support located within the tyre and form an air-tight joint.
Any other suitable support may be employed instead of an "U" shaped one. More
or less of an annular depression is preferably formed around the tyre where the joint
is made.
This form of tyre may be opened without removing it from its rim and it may be '
used to cover an internal pneumatic tube.
Dated this 6th day of July 1896
DRACUP & NOWELL,
Bradford, Patent Agents.
COMPLETE SPEC
ION.
Improvements in Pneumatic Tyres, particularly applicable to
"Single-tube" Tyres.
I, WILLIAM TATTERSALL, of 37, Glasslyn Road, Crouch End, London, late of
51, Wellclose Terrace, Leeds, in the County of York, Engineer, do hereby declare
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 relates to improvements in pneumatic tyres particularly applicable

page_text: to single tube tyres, and its primary object is to enable the interior of the tube
to be readily inspected for repairs or the like without removing the tyre from
the rim.
For this purpose I divide the walls of the tyre round the external periphery of the
tyre and I provide internally projecting lips around each side of the division adapted
to hear against the internal sides of an annular "U" shaped bearing or support,
located within the tyre, and form an air-tight joint. Any other suitable support for
the edges of the tyre may be employed.
To fully describe my invention, reference is made to the accompanying sheet of
drawings, formning a part of this specification, in which similar letters of reference
indicate corresponding parts in each of the figures.
Figure 1, represents a cross section of a tyre made in accordance with my
improvements.
Figure 2, represents a similar view showing the tyre open.
Figure 3, is a separate cross section of the said "U" shaped support.
Figures 4 and 5, represent similar views to Figures 1 and 2 and illustrate a
modification.
Figure 6, is similar to Figure 4 but fitted with an inflatable inner tube.
In Figures 1 and 2 the tyre A is made to open all round the middle of its external
periphery and it is, kept closed when inflated by the folded lips B formed around each
edge of the division round the tyre and which previous to inflation are placed inside
the annular "U" shaped support C located within the tyre. The lips B are made
soft and pliable consequently the internal pressure in the tyre presses them against
the interior of C and forms an air tight joint.
The tyre may be made of the materials usually employed in the manufacture of
pneumatic tyres and they are moulded in such a way that they assume approximately
the form shown in Figure 1 when inflated.
In Figures 4 and 5 the annular piece C is dispensed with and endless wires D
and D 2 are fixed around the edges of the tyre. When the tyre is inflated the wires
occupy the position shown in Fig. 4 but when it is deflated they can readily be
sprung out to open the tyre. A soft and pliable flap E is formed round one edge of
the tyre to bear against the internal wall of the other edge and form an air tight joint
when the tyre is closed and inflated.
An inflatable inner tube J is shown fitted inside the tyre in Figure 6.
The tyres are secured to the rim G by the strap or annular binder H. This strap
may be made of leather, metal or other suitable material and the ends are secured
together in any convenient manner.
Having now particularly described and ascertained the nature of my said inven
tion, and in what manner the same is to be performed, I declare that what
claim is :
1. A pneumatic tyre made to open round its external periphery and to be held
closed by the internal pressure, substantially as herein shown and described.
2. The improvements in pneumatic tyres substantially as berein shown and describe
and illustrated in the accompanying drawings.
Datad this 5th dose of Mar 1907
DRACUP & NOWELL,
Bradford, Patent Agents.