Year: 1896

page_text: Date of Application, 8th Oct., 1896.
Complete Specification Left, 8th July, 1897-Accepted, 14th Aug., 1897
I, JOHN THOMAS BARTLETT, of 2 Bloomfield Road, Bow, in the County of London;
Advertising Agent, do hereby declare the nature of this invention to be as follows:-
This invention has for its-object to construct a tyre which shall not need inflating,
and which, when punctured, cannot collapse.
I form the outer covering or case of my improved tyre of india-rubber, or other
suitable elastic material. A coil of india-rubber or other suitable material is fitted,
spirally, within the said outer covering, in order to strengthen same. This coil is
thus in the form of an internal screw, or internal spiral flange, fitted to the outer
covering. The turns, of this internal screw or spiral flange may be any suitable
distance apart.
I may, or may not, as I. prefer, form the outer covering and the internal coil both
in one piece.
Within the space existing at the centre of the tyre, all round, I may, if I prefer,
provide a spiral spring of steel or other suitable material, in order to give greater
strength to the tyre, if needed; or I may employ any other suitable strengthening
device in place of the said spiral spring.
J. T. BARTLETT,
Applicant.
I, JOHN THOMAS BARTLETT, of 2 Bloomfield Road, Bow, in the County of London;
Advertising Agent, 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 has for its object to construct a tyre which shall not need inflating,
and which, when punctured, cannot collapse.
I form the outer covering or case of my improved tyre of india-rubber, or other
suitable elastic material. A coil of india-rubber or other suitable material is fitted,
spirally, within the said outer covering, in order to strengthen same.
thus in the form of an internal screw, or internal spiral flange, fitted to the outer
covering. The turns of this internal screw or spiral flange may be any suitable
distance apart.
I may, or may not, as I prefer, form the outer covering and the internal coil both
in one piece.

page_text: Within the space existing at the centre of the tyre, all round, I may, if I prefer,
provide a spiral spring of steel or other suitable material, in order to give greater
strength to the tyre, if needed; or I may employ any other suitable strengthening
device in place of the said spiral spring.
And in order that my said invention may be more clearly understood, I will now
proceed to describe the same with reference to the drawing accompanying this
specification, in which Fig. 1 shows an elevation of a portion of a tyre constructed in
accordance with my invention (the outer covering being partly removed); Fig. 2
an end elevation of same.
The same letters of reference denote the same parts in both views.
a shows the outer covering or case, and b the internal coil. The case a and the
coil b are each composed of any suitable elastic but non-metallic material. The coil b
may be made as shown on the drawing, or the material composing it may be of
circular or any other shape in cross section.
The case a and coil b are represented as being separate pieces on the drawing, in
which case they would be secured to each other by solution or any other suitable
means.
It will be seen that a tyre constructed as before described does not need inflating,
and when punctured cannot collapse.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is
1. In elastic tyres the employment of an elastic but non-metallic coil or screw,
extending right round the tyre within the outer covering.
2. The improved elastic tyre substantially as described and shown on the
accompanying drawing.
Dated this 8th day of July 1897.