Improvements in or relating to Pneumatic Tyres for Wheels.
Year: 1898

page_text: Date of Application, 29th Sept., 1898
Complete Specification Left, 26th Oct., 1898-Accepted, 17th Dec., 1898
PROVISIONAL SPECIFICATION.
Improvements in or relating to Pneumatic Tyres for Wheels.
I, LIONEL HARRY WALLACE KNIGHT, of Crown Street Cycle Works, Cocker-.
mouth, in the County of Cumberland, Engineer, do hereby declare the nature of
this invention to be as follows:-
:-
This invention consists of a nearly tubular metal rim, with an inflated air tube
inserted or enclosed therein. The periphery of the tubular rim has a continuous
slot or opening all round its circumference, through which projects a solid rubber
band of considerable thickness forming the tread of the wheel This tread bears
against the elastic air tube within the tyre, and may be connected thereto.
is formed with a shoulder or bead so that it cannot be pressed into the rim even
if the air tube collapses, but still forms an elastic periphery to the wheel.
It
My invention provides (1) an enclosed pneumatic tube which being entirely
surrounded by the rim is unpuncturable, and which when deflated can be readily
detached from said rim. It also furnishes (2) an elastic tread which prevents the
deflation of the tube from seriously impeding the progress or use of the wheel.
(3). The tread when worn can be easily renewed.
Dated this 29th day of Sentember 1908
S. S. BROMHEAD,
Agent for Applicant, 171, Queen Victoria Street, London, E.C.
Improvements in or relating to Pneumatic Tyres for Wheels.
I, LIONEL HARRY WALLACE KNIGHT, of Crown Street Cycle Works, Cocker-
mouth, in the County of Cumberland, 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 consists of a nearly tubular metal rim, with an inflated air tube
inserted or enclosed therein. The periphery of the tubular rim has a continuous
slot or opening all round its circumference, through which projects a solid rubber
band of considerable thickness forming the tread of the wheel. This tread bears
against the elastic air tube within the tyre, and may be connected thereto. It
is formed with a shoulder or bead, so that it cannot be pressed into the rim even
if the air tube collapses, but still forms an elastic periphery to the wheel.
My invention provides (1) an enclosed pneumatic tube which being entirely
surrounded by the rim is unpuncturable, and which when deflated can be readily
detached from said rim. It also furnishes (2) an elastic tread which prevents the
[Price 8d.1

page_text: deflation of the tube from seriously impeding the progress or use of the wheel.
(3). The tread when worn can be easily renewed.
I will now describe my invention with reference to the accompanying drawings
in which:
Fig. 1 shows a cross section of the improved tyre.
Fig. 2 shows an enlarged cross section of the tread of the tyre.
Fig. 3 shows an enlarged section of the device for preventing puncture.
a is the metal rim, of the special section shown, and is formed with beaded
edges a¹. Inside the rim placed an air tube b, of the usual kind provided with
a valve b¹; is the tread of the tyre which has a broad base formed as shown by
side extensions d of any suitable section, the tread being attached to, or separate
from the air tube as preferred. When the air tube is inflated the recesses (in
the extensions d of the tread, will engage with the beaded edges of the rim, thus
holding the tread in position. The upper portion of the tread is provided with
side flanges e, so that should the tyre become deflated the rim will ride on these
flanges, thereby avoiding the discomfort common to ordinary pneumatic tyres
when deflated. The tread surface of the tread may be of any section preferred.
To prevent any danger of puncture through the interstices between the rubber
tread and the rim, the outer side of the air tube may be provided with thin bands
of steel g, enclosed by preference in pockets f of calico or like fabric. The edges
of these bands can be caused to overlap.
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 a pneumatic tyre for wheels the special tubular rim as shown forming an
unpuncturable metallic cover to the inflatable tube, as herein described and set
forth.
2. In a pneumatic tyre, the rubber tread as shown engaging with said special
rim, and bearing on an inner inflatable tube or attached thereto and furnished
with side flanges so as to form an effective tread even when said tube is deflated,
as herein described and set forth.
3. In a pneumatic tyre, the combination of the tubular rim a, the rubber
tread c with side extensions d, recesses d', and flanges e; together with an in-
flatable pneumatic tube b, and with or without steel bands g, as herein described
and set forth.
1000
S. S. BROMHEAD,
Patent Agent, 171, Queen Victoria Street, London, E.C.