and Improved Means of Manufacturing Tubular Hubs for Cycles or other purposes.
Year: 1896

page_text: Date of Application, 27th Oct., 1896
Complete Specification Left. 26th July, 1897-Accepted, 28th Aug., 1897
New and Improved Means of Manufacturing Tubular Hubs for
Cycles or other purposes.
HENRY WALTER LAURIE MACWILLIAM BOURKE 40 Redcliffe Square S.W. Mining
Engineer do hereby declare the nature of this invention to be as follows:-
The tube is placed in a die suitably shaped, inside the tube a mandrel imparts as
desirable, with the use at the points required to be expanded of discs or pieces of any
suitable shape of lead or other expandible material. The plunger of the press
compresses the discs of lead or other suitable material between the mandrel parts,
which discs expanding form a bead & so dilate the tube to the required extent. The
beaded tube is placed in suitable closing in dies, which flattening the beads form the
spoke flanges.
Dated this 27th day of October 1896.
HENRY WALTER LAURIE MACWILLIAM BOURKE.
New and Improved Means of Manufacturing Tubular Hubs for
Cycles or other purposes.
HENRY WALTER LAURIE MACWILLIAM BOURKE 40 Redcliffe Square S.W. Mining
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 consists of a method of making hubs for cycles, or for other purposes,
from tubes, or tubular blanks, the spoke flanges being formed from the material of
the tube itself, in the manner hereinafter described.
The process of forming the spoke flanges on the tube or tubular blank is done in
two stages or operations.
1st. The tube or blank is bulged, beaded, or creased.
2nd. The beads, or creases, are flattened to form the spoke flanges.
The tube, or tubular blank may be of equal gauge throughout its length,
Figs. 1 & 5 Sheet 1; or it may be thickened at the ends Figs. 1 & 5 Sheets 2 & 3.
To bulge or bead the tubular blank the mandrels & expandible discs are placed in its
interior. The mandrels D D Figs. 1, 2 Sheets 1, 2, 3; closing each end of the
blank A, have a shoulder on them, which bearing on the end of the tubular blank
serves to feed the blank into the die, while the lateral expansion of the expandible
discs dilates the blank in the required parts. The bulging or beading die B Figs 1 & 3
Sheets 1, 2, 3, may consist of one piece split into two or more portions
Figs. 1 & 3, Sheet 1; or it may be in two or more separate portions, each split into
LD071

page_text: two or more pieces as may be suitable Figs. 1 & 3 Sheets 2 & 3. For bulging, a disc
or discs of the expandible material, with, or without, the use of a central mandrel
Fig. 1, Sheets 1, 2, 3, are used. The expandible discs are composed of lead, india-
rubber, sand, or other suitable expandable material capable of flowing laterally under
pressure. Either a single thick dise of the expandible material is used between the
end mandrels, see Figs. 1 & 4 Sheet 3; or two thinner discs F F, of the
expandible material are used in conjunction with a central mandrel E Figs. 1
Sheets 1 & 2.
The tubular blank A, thus loaded is placed in the bulging or beading die B B,
which is suitably shaped for the tube to bulge into, and itself fits into a collar C,
which holds the die, while the tubular blank is being bulged.
Pressure is applied on the end mandrels D D, and the expandible dises expanding
laterally, cominence to bulge the tubular blank, which at the same time is fed into
the die B B, by the shoulders on the end mandrels D D, until finally the tube has
assumed the shape of the die Figs. 6 Sheets 1 & 2.
The second operation or process of flattening the bulges, beads, or creases, is
performed by placing the bulged blank A, Figs. 6, Sheets 1 & 2, inside the closing in,
or flattening dies H, H, H. Figs. 1, 2 Sheets 4 & 5, these are in two or more pieces
as suitable. The outer pair of which dies have a shoulder, on them, which rests on
the end of the tubular blank A, this serves to push the blank in while being flattened.
These dies H, H, H, fit into a collar K, or other suitable contrivance, in which they
are free to move.
A mandrel G Figs. 1 Sheets 4 & 5 is placed inside the blank A to prevent
distortion while the beads are being flattened. Pressure being applied to the end
dies H. H, the beads on the tubular blank are flattened out between the dies to form
the spoke flanges Figs. 6 Sheets 4 & 5.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
A method of making tubular hubs for cycles, or for other purposes, by,
(1) The bulging, beading, or creasing of tubular blanks, by means of discs of
lead, indiarubber, sand, or other suitable material, capable of expanding laterally
under compression, used in conjunction with suitable mandrels and shaped dies
herein described.
(2) The flattening of the said bulges, beads, or creases formed on the tubular
blank, in suitable closing in, or flattening dies, herein described.
Dated this 21st day of July 1897.
HENRY WALTER LAURIE MACWILLIAM BOURKE.