Improvements in Pneumatic Tyres.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Tyres.
I HENRY JOHN LAWSON Engineer of Dane Court Cliftonville Margate do
hereby declare the nature of this invention to be as follows
Whereas the covers or treads of pneumatic tyres are commonly fixed on run &
adjusted by wnes o tapes at the edges my invention consists of an inside
automatic adjustment by means of a single wire cord or tape by preference
duplex lying at the bottom of felloe & made to proceed thro' eyelet holes or
hooks across from side to side in the edges of the cover allowing the same to
creep along it so that by inflating the inner tubo the puckering of the said
wire cord o tapo inside the rim diminishes its length & draws down the cover
within the said in The ends of the said wire cord or tape being adjusted or
Joined by a suitable snap or binding buokle which tightens by bending at an acute
angle as now in common use on braces or suspenders.
Dated this 26th day of December 1894
1, HENRY JOHN LAWSON of Dane Count, Cliftonville, Margate, in the County
of Kent, do hereby declare the nature of this invention, and in what mannor the
same is to be performed, to be particularly described and ascertained in and by
the following statement.-
This invention relates to pneumatic tyres and has particular reference to means
of drawing together the edges of the cover inside which is the air tube.
In the accompanying drawings
Fig. 1 is a perspective view of a portion of a tyre constructed according to this
invention.
Fig. 2 is another view of the same partly in section and partly in olevation
At or near the edges A A' of a pneumatic tyre cover Baie formed either in
the canvas lining of the cover or in other suitable parts, passages or pipes C C¹
running longitudinally round the whole tyre cover.
These pipes have openings on eyelet holes D D' D 2 etc. through their walls,
formed adjacent to the enlarged edges or beads A A', of the outer cover.
A tape
cord wire or the like I is folded is at E and its two ends passed through the
eyelet holes D' into the pipes C C respectively. The ends of the cord II are
then brought out though the eyelet holes D 2, crossed and again passed into the
pipes though the same eyelet boles D2, so that the end of the cord which was in
the pipe C now lies in the pipe C and the end which lay in the pipe C³ now runs
through the pipe C.
The ends of the cord H are passed on and brought out again at the eyelet
holes D 3, when they nie ngam crossed and passed into the opposite pipes as
before.
This process is repeated all round the tyre cover until the ends of the cord H

page_text: are finally brought out through the first eyelet holes D', when they may be joined
in any suitable manner, as for oxample by tying as shown at F Fig. 1. The
distance between the eyelets may vary, but must be sufficient to allow of the air
tube being got at between any two eyelets. By the inflation of the an tube the
edges of the cover are drawn close together at the junction points, and forced apart
between them, this, owing to the sinuosity produced in them, tends to reduce tho
total length of the cords in the circular path and causes the cover to more firmly
grip the iim J.
It will be understood that if preferred two cords may be employed in place of
the single one, shown in the drawings, and the edges of the corer may be stiffened
sufficiently to prevent puckering.
A lip or apron of any suitable fabric is placed between the an tube and the
edges of the cover to prevent the former boing nipped when the edges are drawn
together upon inflation of the tyle
The an tube G is first placed in position in the cover B the cord being then
passed through the pipes C C, after which the whole tyre is placed on the iim and
inflated.
My improved cover may be made of any oidinary materials as for example
rubber lined with canvas or threads, the edges being strengthened or not, and
enlarged or not as desned, and made stretchable or non-stretchable.
I am aware that it has been proposed to unite the cages of the tyre cover by
lacing, the tendency upon inflation being for the edges to separate, and I make no
claim to such arrangement, inasmuch as it had not the effect which I produce of
automatically drawing together the divided edges of the cover.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is ;-
1. In a pneumatic tyre a cover having its edges so connected by cords that on
Inflation of the air tube the edges are drawn together at the junction points and
forced apart between these points substantially as described.
2. In a pneumatic tyre a cover having pipes in its edges and openings or
eyelets in these pipes in combination with cords passing through these pipes and
eyelets substantially as and for the purpose described and illustrated in the
accompanying drawings.
3. A pneumatic tyre constructed and operating substantially as described and
illustrated in Figures 1 and 2 of the accompanying diawings.
Dated this 21st day of October 1895.
II. J. LAWSON.
Boult & Wade,
Agents for the Applicant.