Improved Bicycle Tyre
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improved Bicycle Tyre
JOHN BREBNER 24 Holyoak Road Newington Butts S.E. Electrician I do
hereby declare the nature of this invention to be as follows:-
This tyre is made in several sections, each section is closed in at both ends,
and when placed inside a rim of bicycle they are covered with an outer indiarubber
cover, and when inflated they butt closely together. They are connected to tho
un by tubes about half inch from each end of each section. These tubes have a
flange inside each section and a nut on the outside of the tum making it an tight.
The tubes are joined together with small taps.
The advantage of this tyre is that when it receives a puncture a section can be
removed and replaced with another in a few moments making it perfectly sound
again. One or two of these sections can be rolled up and carried in the pocket of
the der without any inconvenience as they take up a very small space.
A puncture does not necessitate the rider stopping in a case of emergency.
23rd October 1895.
JOHN BREBNER.
1, JOHN BREBNER of 24, Holyoak Road, Newington Butts, S.E. Electrician,
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 pneumatic tyres and has for its object to enable the
defective portion of the air chamber to be readily removed and replaced by a sound
one, and to obviate the complete deflation of the tyre in the event of the air
chamber being punctured.
According to the invention the air chamber is made up of a number of inde-
pendent segments which are closed at the ends but are connected by tubes which
may be provided with, or act as, valves permitting the passage of an during
inflation from one segment to another but preventing, in case of injury to one
segment, the rapid escape of the an from the other segments so that in case of
emergency the puncture of one segment does not necessitate a stoppage
The invention is illustrated in the accompanying diawings forming part of this
specihcation wherein Figure 1 is a view of a portion of a tyre, the outer cover
being in section to shew the abutting ends of inflated segments and two forms of
connecting tube and valve, the latter being shewn separately in section on a greatly
enlarged scale, in Figures 2 and 3.
A A'A' A³ are segmental an chambers of which there may be any convenient
number to make up the complete tyre. The closed ends of the tubular segments
abut closely together end to end and for this purpose the ends when made are not at
right angles to the length of the tube but (as indicated in Figure 4) at such an

page_text: angle that when they abut together around the wheel im they will make close
radial joints within the usual outer cover B in which they are enclosed. Adjacent
segmental chambers are connected near the ends the connection being either by
the tubular valve-controlled coupling such as shewn in Figure 2, or by that shewn
in Figure 3, or by a plain tube, one or more of the first mentioned valves being
preferably provided in any case for purposes of inflation.
The coupling shewn at C in Figure 1 and in detail section on an enlarged scale
in Figure 2, consists of screw-thieaded tubes a making air-tight joints with the
segmental air chambers, and passing through the wheel rum D to which they are
secured by nuts. The outer ends of these tubes are connected by a tubular
coupling of binige piece by means of sciew couplings e and upon this tube bis
fitted a chamber d containing a conical spring-pressed valve e by which the
connection of the segmental chambers through the tube is normally interrupted.
The tube is also provided with a sciew nozzle f closed by a screw-cap y adapted
when screwed inwards to press on the end of the valve stem so as to put adjacent
an chambers in communication during inflation from another point.
Ór by
removing the cap g the inflating pump may be connected to the nozzle f for the
purpose of inflation through this coupling which may thus be performed at any
number of points in the circumference of the wheel at which this form of coupling
is provided If it be not desired to guard against deflation but merely to euable a
damaged segment to be replaced by a sound one, the valve e aud its chamber d
may be dispensed with at all the couplings except where inflation is to be effected,
the segments being in that case merely connected by a tube such as band
couplings c.
The other form of coupling consists of two small flexible rubber tubes h joined
to the segmental air chambers and united preferably through a short length of
metal tube 1. These tubes lie against the interior of the wheel um D and are so
arranged that the rubber tubes h necessarily become bent or kinked as shewn with
the result that they will act as valves giving passage for the air from one segmental
air chamber to the next during inflation but preventing or retarding the escape of
air from an unjured segment to a punctured one.
With either form of connection the operation of removing a damaged au
chamber segment and replacing by a spare one may bo quickly performed
Having now particularly described and ascertained the nature of tho said
invention and in what manner the same is to be performed I declare that what I
claun is:
1. The construction of a pneumatic tyre of a number of segmental au chambers
abutting end to end and forming close radial joints, the segnients being 'connected
by coupling tubes as described."
2. The combination, with a pneumatic tyre constructed of independent segmental
au chambers as described, of valve-controlled coupling tubes connecting said
segmental chambers and adapted to permit of the passage of air during inflation
but preventing or retaiding its escape in case of injury to any one segment
substantially as specified.
Dated thus 24th day of Lule 1806
A. M. & WM. CLARK,
53, Chaucery Lane, London, Chartered Patent Agents.