An Improved Pneumatic Tyre, the Chief Features of which are the Fastenings.
Year: 1892

page_text: Date of Application, 21st Oct., 1892
Complete Specification Left, 19th Apr., 1893-Accepted, 20th May, 1893
PROVISIONAL SPECIFICATION.
An Improved Pneumatic Tyre, the Chief Features of which are the
Fastenings.
JOHN MAUGHAN 151 High Street East Pattern Maker and WILLIAM KEY
of 11 St. Georges Terrace Roker Army Contractor both of Sunderland in the
County of Durham do hereby declare the nature of this invention to be as
follows:-
The rim to be constructed as shown in the drawing A with a channel formed on
each edge. In these channels are placed continuous rings B of ebonite or other
suitable material. In the edge of the canvas is placed a ring D of copper either
in one or separate lengths. The action of the fastenings B being of a springy
nature always presses towards the outer edge of channel e.
The edge of the canvas being wired so as to prevent it from being withdrawn,
except when tyre is deflated, and the ring B pressed into bottom or wide part of
channel C. The dotted line shows hollow rims.
Dotad this 20th day of October 184D
JOHN MAUGHAN.
WILLIAM KEY.
COMPLETE SPECIFICATION.
An Improved Pneumatic Tyre, the Chief Features of which are the
Fastenings.
We, JOHN MAUGHAN of 151 High Street East, Pattern Maker and WILLIAM
KEY of 11 St. George's Terrace, Roker, Army Contractor both in Sunderland in
the County of Durham, 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 improvements in means for securing pneumatic tires to
the rims of cycles.
We effect our object by the adoption of a special form of rim and by the
introduction of hoops of a springy nature arranged so as to secure the tire as
hereinafter described.
We will describe our invention with reference to the accompanying drawings
in which
Figure 1 shows a section of a cycle rim and tire and mode of fastening same
Figure 2 being a side view of Figure 1 and Figure 3 a side view of part of a
similarly arranged device and throughout the following description like marks of
reference designate like parts.
Referring to the drawings it will be observed that we form a rim a of a special
section preferably in rolled steel. In the middle there is a recess in which the
india rubber air or inflation tube a' lies. Then at the sides of the rim there are
formed two chambers which are arranged to enlarge toward their basal parts
and to contract towards their openings for the special purpose hereinafter described.
bis the rubber tire attached in any convenient manner to the canvas sheet c the
marginal edges of which embrace or have secured to them certain wire or other
stiffening or enlarging pieces or hoops e. f are hoops or bands or rings of ebonite,
cane or other sufficiently flexible and durable material arranged to traverse the
circumferences of the chambers a' and they must be adjusted in the chambers. so
that their tendency shall always be to spring outwards in other words they must
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page_text: be sufficiently resilient so that when depressed within the chamber by the finger or
otherwise at any point their tendency shall always be to return to their original
positions ciz. the positions shown in Fig. 1. Thus when the tube a' is inflated the
parts are severally arranged in the positions shown in the figures the pieces being
squeezed between the hoops e the exterior of the tire and the curved-in portion p
at the lateral extremities of the rin a. In this manner the tire is effectually
secured in its position on the rim. But when it is necessary or desirable from any
cause to remove the tire or a portion thereof from the rim the act of pressing down
a portion of the hoop or ring into the basal part of the chamber a will enable the
parte of the tire to slip past the part which has been so depressed and in this
way the tire or a part thereof can be released from its position at other times
locked within the chamber a². Similarly to replace the tire or a portion thereof
the wired or enlarged edge thereof is pressed against the resilient hoop until the
increasing width within chamber a permits the edge e to slip past hoop when the
parts will reassume the position shown in Fig. 1.
In Fig. 3 is shown a spiral springs in substitution for the resilient hoopf. The
spring may be wound round or have passed through it a leather or other water-
proof core to prevent access of water to the chambers a². The spring thus arranged
acts like a piston-spring its pressure always tending outwardly but it is designed to.
be depressed like the cane or ebonite hoops aforesaid in manner and for the purposes
herein before mentioned.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
1. The improved device or mode of fastening or unfastening pneumatic tires to
or from cycle rims by forming lateral channels in the cycle rim whereof the basal
portions are larger than the aperture portions within which channels the wired or
enlarged edges of the tire are designed to be secured or unfastened by the action of
a resilient ring or hoop for springs the several parts being arranged and adapted
to operate substantially as herein set forth.
2. The improved arrangement or combination of parts for fastening or unfastening
pneumatic tires to or from rims of cycles substantially as herein described and
illustrated in the accompanying drawings,
Dated this 14th day of April 1893.
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.