Improvements in or connected with Pneumatic Tyres.
Year: 1895

page_text: Date of Application, ord Sept., 1895
Complete Specification Left, 3rd June, 1896-Accepted, 18th July, 1896
PROVISIONAL SPECIFICATION.
Improvements in or connected with Pneumatic Tyres.
I, JOHN SAMUEL SMITH, of 244, Borough High Street, in the County of
London, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to pneumatic tyres and has for its object to prevent
punctures and wear on the tread of the cover.
According to my invention a trough or channel is formed in the centre of the
cover, into which trough or channel a strip of india-rubber either plain or
corrugated to prevent side-slip, is inserted, the said strip being attached by
solution or otherwise. The india-rubber of this centre strip on the tread of the
cover is applied in a state of compression, that is to say, a greater length than the
circumference of the tyre or width of the trough or channel is pressed together by
suitable means to form the tread of the tyre, thus minimising risk of puncture and
causing cuts from wear and tear to close up.
The rubber strip being inserted in the cover it is impossible for it to be ripped.
off as sometimes occurs with loose strips attached to treads of tyres.
By my invention no extra weight is added to the
is obtained by the rubber being in compression, and
with the ordinary outside covers of pneumatic tyres.
after wear.
Dated this 3rd dow of Sentember 1895.
tyre, and a greater resiliency
not in tension as is the case
The strip also can be renewed
Improvements in or connected with Pneumatic Tyres.
I, JOHN SAMUEL SMITH, of 244, Borough High Street, in the County of
London, Engineer, do bereby 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 :-
My invention relates to pneumatic tyres and has for its object to prevent
punctures and wear on the tread of the cover.
According to my invention a trough or channel is formed in the centre of the
cover, into which trough or channel a strip of india-rubber, either plain, or
corrugated to prevent side-slip, is inserted, the said strip being attached by
solution or otherwise. The india-rubber of this centre strip on the tread of the
cover is applied in a state of compression, that is to say, a greater length than the
circumference of the tyre or width of the trough or channel is pressed together by
suitable means to form the tread of the tyre, thus minimizing risk of puncture and
causing cuts from wear and tear to close up.

page_text: To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is a plan view of a part of a cover having an india-rubber strip applied
thereto in accordance with my invention; and,
Figure 2 is a transverse section of the same.
a is the jacket or cover of the pneumatic tyre, and b is the strip inserted into a
groove formed to receive the same. In practice this strip is introduced in the
following manner, that is to say, the jacket a is stretched to an extent considerably
in excess of that to which it is stretched when upon the wheel, and whilst in this
stretched condition the strip 6 is laid in the groove in its normal condition, that is
to say, without any stretching and is secured therein by means of cement or by
other suitable means. The jacket is now removed from the drum and in contracting
to its normal condition places the strip 6 in compression.
The rubber strip 6 being inserted in a groove in the cover a, it is impossible for
it to be ripped off as sometimes occurs with loose strips attached to the treads of
tyres.
By my invention no extra weight is added to the tyre, and a greater resiliency
is obtained by the rubber being in compression, and not in tension as is the case
with the ordinary outside covers of pneumatic tyres. The strip also can be
renewed after wear.
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 I
claim is :-
1. The improvement in pueumatic tyres consisting in forming in the jacket
or cover a trough or channel into which a strip of india-rubber, either plain or
corrugated, is applied so that it is in a state of compression, substantially as
described.
2. The manufacture and use of pneumatic tyres having covers provided with a
tread, substantially as hereinbefore described and illustrated in the accompanying
.drawing.
Dated this 3rd day of June 1896.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.