Improvements in Elastic or Pneumatic Rubber Tyres for Cycles and Carriage Wheels.
Year: 1896

page_text: Date of Application, 14th May, 1896
Complete Specification Left, 1st June, 1896-Accepted, 5th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in Elastic or Pneumatic Rubber Tyres for Cycles and
Carriage Wheels.
I JOSEPH HAMILTON of No. 29 Holmewood Road Brixton Hill in the County
of London do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in the construction of rubber tyres or of
tyres of elastic substances constructed in similar forns for wheels tyres of cycles
and carriage wheels. The object of my invention is to construct hollow tyres of
duplex or multiple form sections whereby I obtain several compressible parts to
secure more even running and a reduction of vibration. The hollow spaces within
the tyres are filled with air at temperature of about 20 degrees Centigrade. The
openings left in the sides of the tubes are sealed during the time the tyres are in
the freezing chamber (which I propose to use) upon removal of the tyres from the
freezing chamber they may be subject to higher temperature which will cause the
air within the various tubes to expand and produce a slight internal pressure.
The tyres hereafter described are of various sectional forms and all tend to
produce same result during use, various forms are shown by Figs. 1. 2. 3. 4. 5. 6.
Sheet 1. The letters a. on all the sections or figs. refer to apertures or air
spaces. The letters b. refer to the rubber or elastic material. The letters c. refer
to canvas used in the manufacture of the tyre. The letters frefer to the rolling
faces or treads of the tyres. The letters g. refer to the webs in all the sections
Figs. 1. 2. 3. 4. 5. 6. the webs g. in all cases taking part of the compressive and
tensional strains tend to keep the various forms of tyres in more uniform shape
during running and to minimise the tendency to slip on wood paving or asphalte
and metal tram lines.
Fig. 6 is a section of tyre with one vertical web and bottom web forming
duplex air chambers. E. E¹ are metal wire rings to secure the tyre to the metal
rim of the wheel.
Dated 13th day of May 1896.
JOSEPH HAMILTON.
COMPLETE SPECIFICATION.
Improvements in Elastic or Pneumatic Rubber Tyres for Cycles and
Carriage Wheels.
I, JOSEPH HAMILTON of No. 29, Holmewood Road Brixton Hill in the County
of London, 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 :-
My invention relates to improvements in the construction of rubber tyres, or
tyres of elastic substances constructed in similar forms for wheel tyres of cycles,
and carriages. The object of my invention is to construct hollow, or tubular tyres
with two, or more air spaces through the entire length of the tyres, and which
I make of various sections, whereby I obtain several compressible parts to secure
more even running and a reduction of vibration.

page_text: The tyres when manufactured may be placed in a freezing chamber, when the
hollow spaces within the tyres will fill with air of the temperature of the chamber,
say about 20 degrees below zero, (through the openings left in the sides or walls of
the tubes).
The said openings may be sealed during the time the tyres are in the freezing
chamber which I propose to use, and may be of any known construction such as
used for ice making. Upon removal of the tyres from the freezing chamber they
will be subject to variations of temperature to that within the freezing chamber.
If higher the air within the tubes will slightly expand and produce a certain
amount of pressure within the tubes and impart same to the outer walls of the
tyres.
The tyres hereafter described are shown on Sheet 1, Figs. 1. 2. 3. 4. 5. 6 the
same being that which was filed by me with my Provisional Specification.
The letter a in all the sections Figs. 1. 2. 3. 4. 5. 6. Sheet 1, refers to the
apertures or air spaces in the tyres. The letter b refers to the rubber or elastic
Bubstance. The letter, c, refers to the canvas used in the manufacture of the tyres.
The letter f. refers to the rolling faces or treads of the tyres. The letter g. refers
to the webs in all the sections Figs. 1. 2. 3. 4. 5 6. Sheet 1.
The webs. g. in all cases take part of the compression and tension strains and
tend to keep the various forms, or sections of tyres, in a more uniform shape
during running and also to minimise the tendency to slip on wood paving, and
stone paving when in a slippery state with mud, and also to lessen the tendency to
slip on metal tram lines.
Fig. 6. Sheet 1. is a section of a tyre with one vertical web and a bottom web,
forining a duplex or two air chambered tyre, E. E¹ are metal rings to secure the
tyre to the metal, or other material of which the rim of the cycle is made.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is (or may) be performed, I declare that what I
claim is-
1. A rubber or other elastic tyre, or tyres, similar to those shown by drawings,
they each being formed with two or more air spaces or tubes combined in one in
such a manner that they each reduce the amount of inconvenience arising from
accidental puncture of any one of the walls of the tubes, or air spaces during use,
substantially as herein described.
Dated this 30th day of May 1896.
JOSEPH HAMILTON.