Improvements in the Manufacture of Solid or Jointless Metal Tyres or Rims for the Wheels of Cycles and other Road Vehicles.
Year: 1897

page_text: Date of Application, 4th Nov., 1897
Complete Specification Left, 22nd Apr., 1898-Accepted, 2nd July, 1898
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Solid or Jointless Metal Tyres
or Rims for the Wheels of Cycles and other Road Vehicles.
I, FREDERICK WILLIAM BRAMPTON, of Brockencote Hall, Chaddesley Corbett,
Kidderminster, in the County of Worcester, Justice of the Peace, Gentleman, do
hereby declare the nature of my said invention to be as follows:-
to
or
My invention has for its object improvements in the manufacture of metal tyres
or rims for the wheels of cycles and other road vehicles, and is for the purpose of
producing a brazeless tyre, rim, or ring from a solid or welded ring or disc which
shall be so manipulated in the process of manufacture that it shall be character-
ized by the fibre or grain of the metal running in the direction of the circum-
ference of the tyre, rim or ring. I am aware that tyres are already in use which
are formed from large circular blanks of thin sheet metal drawn or cupped to
the required depth without welding, but such tyres are characterized by the grain
or fibre of the metal running across the circumference in some places and at other
parts of the circumference in other directions thus giving a tyre or ring of vary-
ing tensile strength in different parts of the same ring the value of which is but
the strength of the weakest part i.e. where the grain or fibre runs directly across
the rim and it is therefore of low bursting strength. Such tyres are not found in
practice to be satisfactory. Now my invention avoids this weakness and produces
a tyre of equal strength at every part of the circumference. According
my invention when making weldless tyres rims I proceed by
first taking a solid billet,or bar or a hollow billet or thick tube of metal before a fibre
or grain has been markedly produced in any direction. Such for instance as by
cross cutting slices or blanks from a round ingot or bar or from such an ingot
which has been pierced into a hollow weldless cylinder or tube by well known
means and which is in a simple homogeneous condition with little or no grain
formed in any direction to any marked extent. I proceed with such homogeneous
blanks or rings of suitable size to produce the desired tyre rim or-ring. In the
case of the solid blank I proceed by first making a suitable hole through the centre
to receive a mandril or two centre pointed mandrils may be inserted one from
each side of the blank. Continuing with either the blank or ring in a heated
state I subject it to a rolling process until a ring is roughly formed to an inter-
mediate size and condition, the mandril acting as an inner roll or rolls, or a roll
or rolls may be mounted, and worked to treat the inside surface in various ways.
When operating upon a solid blank I may proceed upon it while hot by gradually
forcing the pointed mandrils or lathe centres towards each other on either side
of said blank the external rolling then proceeding, which has the effect of con-
solidating the metal in the direction in which it is desired to produce the grain
or fibres. By external, or by external and internal rolling, the blank is brought
while hot to the desired intermediate size and condition. The process of enlarge-
ment and formation further proceeds by the introduction of larger centre formers
or a roll or rolls for which purpose the now enlarged ring may be reheated or
not this depending upon the section and size of the tyre or ring to be produced.

page_text: By continuing the rolling process in rolls still nearer in shape to the required
section the ring is gradually finished by cold rolling to its ultimate state. I may
also make my tyres, rims, or rings by first bending a piece of metal of substantial
section into a ring which is welded with a long splice weld so that when it has
been subjected to the before explained process of rolling until the light thin tyre
is formed, the weld has become a very long one which will be found to have
greatly reduced or minimized the liability to fracture inherent to welding.
I thus produce a finished solid, brazeless or jointless tyre, such finished tyre,
rim, or ring being characterized by great solidity and by having the fibres or
grain of the metal running circumferentially with the tyre, rim or ring produced.
Dated this 2nd day of November 1897.
GEORGE BARKER,
Agent for Applicant, 77, Colmore Row, Birmingham.
Improvements in the Manufacture of Solid or Jointless Metal Tyres
or Rims for the Wheels of Cycles and other Road Vehicles.
I, FREDERICK WILLIAM BRAMPTON, of Brockencote Hall, Chaddesley Corbett,
Kidderminster, in the County of Worcester, Justice of the Peace, Gentleman, do
hereby declare the nature of my said invention and in what manner the same is
to be performed to be particularly described and ascertained in and by the fol-
lowing statement:.
--
My invention has for its object improvements in the manufacture of metal tyres
or rims for the wheels of cycles and other road vehicles, and is for the purpose of
producing a brazeless tyre, rim, or ring from a solid or welded ring or disc, which
shall be so manipulated in the process of manufacture that it shall be character-
ized by the fibre or grain of the metal running in the direction of the circum-
ference of the tyre, rim or ring. I am aware that tyres are already in use which
are formed from large circular blanks of thin sheet metal drawn or cupped to
the required depth without welding, but such tyres are characterized by the grain
or fibre of the metal running across the circumference in some places, and at other
parts of the circumference in other directions, thus giving a tyre or ring of vary-
ing tensile strength in different parts of the same ring, the value of which is but
the strength of the weakest part i.e. where the grain or fibre runs directly across
the rim and it is therefore of low bursting strength. Such tyres are not found in
practice to be satisfactory. Now my invention avoids this weakness and produces
a tyre of equal strength at every part of the circumference.
According to my invention when making weldless tyres or rims I proceed by
first taking a solid billet or bar or a hollow billet or thick tube of metal before a fibre
or grain has been markedly produced in any direction. Such for instance as by
cross cutting slices or blanks from a round ingot or bar or from such an ingot
which has been pierced into a hollow weldless cylinder or tube by well known
means and which is in a simple homogeneous condition with little or no grain
formed in any direction to any marked extent. I proceed with such homogeneous
blanks or rings of suitable size to produce the desired tyre rim or ring. In the
case of the solid blank I proceed by first making a suitable hole through the centre
to receive a mandril, or two centre pointed mandrils may be inserted, one from
each side of the blank. Continuing with either the blank or ring in a heated
state I subject it to a rolling process until a ring is roughly formed to an inter-
mediate size and condition, the mandril acting as an inner roll or rolls, or a roll
or rolls may be mounted, and worked to treat the inside surface in various ways.

page_text: When operating upon a solid blank I may proceed upon it while hot by gradually
forcing the pointed mandrils or lathe centres towards each other on either side
of said blank the external rolling then proceeding, which has the effect of con-
solidating the metal in the direction in which it is desired to produce the grain
or fibres. By external, or by external and internal rolling the blank is brought
while hot to the desired intermediate size and condition. The process of enlarge-
ment and formation further proceeds by the introduction of larger centre formers
or a roll or rolls for which purpose the now enlarged ring may be reheated or
not, this depending upon the section and size of the tyre or ring to be produced.
By continuing the rolling process in rolls still nearer in shape to the required
section the ring is gradually finished by cold rolling to its ultimate state. I may
also make my tyres, rims, or rings by first bending a piece of metal substantial
section into a ring which is welded with a long splice weld so that when it has
been subjected to the before explained process of rolling until the light thin tyre
is formed, the weld has become a very long one, which will be found to have
greatly reduced or minimized the liability to fracture inherent to welding.
I thus produce a finished solid brazeless or jointless tyre such finished tyre,
rim or ring being characterized by great solidity and by having the fibres or
grain of the metal running circumferentially with the tyre rim or ring produced.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what I
claim is:-
CLAIMS.
First: The improvements in the manufacture of tyres or rims for the wheels
of cycles and other road vehicles from a blank or ring of metal which is subjected
to a rolling process for its enlargement in the manner and for the purpose sub-
stantially as herein set forth.
Second-Metal tyres, rims or rings for wheels made by the process of rolling
from weldless discs or rings of metal so as to bring the fibres or grain in circum-
ferential line with the article produced.
Third: Making metal tyres rims or rings by first welding together a ring of
metal and then enlarging the ring by rolling to the desired diameter and reduced
section for cycles and other vehicles substantially as and for the purpose herein
set forth.
Dated Th10
S
1000
1000
21st daV OT ADMI
FREDERICK WILLIAM BRAMPTON,
By George Barker,
Fellow of the Chartered Institute of Patent Agents,
Agent for Applicant, 77, Colmore Row, Birmingham.