Improve
Year: 1895

page_text: We EBERHARD SCHUMACHER, Engineer, 55 Ladbroke Road, Bayswater, W.,
and FRANCIS OTTO GRUBER, Engineer, 14 Allsop Place, Regent's Park,
London, W., do hereby declare the nature of this invention to be as follows:-
The chief object of our invention is to produce, in a simple and more economical
manner than heretofore, wheels or runners suitable for castors, and the invention
consists in the mode of producing such wheels.
In carrying out our invention, we may use either sheet metal or tubing for our
purposes. When using sheet metal, we stamp out a disc, which, by means of
suitable tools, and in the well-known manner, we draw into a cup of U section.
We next subject these cups to pressure in a series of suitable dies, by which we
gradually close in the mouth of the cup, and obtain first a pear shaped, and then a
more or less egg-shaped section, and finally a hollow ball.
To produce a wheel, we proceed a step further, and we then flatten the ball, in
suitably formed dies, to a wheel shape.
In making a wheel from tubing, we cut from the tube a piece of the length
required, and then subject it to pressure in a series of suitable dies, by which the
ends are gradually bent over, and caused to close inwards, as it were, leaving only
a small hole on each side. Then, by means of other suitable dies or tools, the
sides of the wheel thus formed are forced inwards, so as to form a rim and a web
of double metal, and a central tube or boss of the full width of the wheel, which
gives a wide bearing surface for the axle.
Although these operations are effected cold, we find it desirable, after each
operation, to soften the metal by subjecting it to heat in any convenient manner.
The metal we employ may be brass or iron, or other metal, or a combination, as
may be desired.
Dated this 31st day of December 1895.
NEWTON & SON,
Agents for the Applicants.
Improved Castor Wheel.
We, EBERHARD SCHUMACHER, Engineer, 55, Ladbroke Road, Bayswater, W.
and FRANCIS OTTO GRUBER, Engineer, 14 Allsop Place, Regent's Park,
London, W. 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 refers to wheels, rollers, or runners, for furniture castors and like
purposes, and consists in making these articles hollow, and forming them from
discs or tubes, whereby they can be produced both lighter and cheaper than at
present.
In carrying out our invention, we may use either sheet metal or tubing for our
When using sheet metal, we stamp out a disc, which, by means of
purposes.

page_text: presses, dies, and suitable tools, and in the well-known manner, we draw into a cup
of U section.
We next subject these cups to pressure in a series of suitable dies, by which we
gradually close in the mouth of the cup, and obtain first a pear shaped, and then a
more or less egg-shaped section, and finally a hollow ball.
To produce a wheel we proceed a step further, and we then flatten the ball, in
suitably formed dies, to a wheel shape..
In making a wheel from tubing, we cut from the tube a piece of the length
required, and then subject it to pressure in a series of suitable dies, by which the
ends are gradually bent over, and caused to close inwards, as it were, leaving only
a small hole on each side. Then, by means of other suitable dies or tools a portion
of the side of the wheel thus formed is forced inwards, so as to form a rim and web
or flange of double metal, and a central tube or boss, of the full width of the,
wheel, which gives a wide bearing surface for the axle.
Although these operations are effected cold, we find it desirable after each
operation, to anneal the metal by subjecting it to heat in any convenient manner.
The metal we employ may be brass or iron, or other metal, or a combination of
metals as may be desired.
We will now describe our invention with reference to the accompanying
drawings in which:
Fig. 1 shows in sectional outline by four consecutive stages, the process of
manufacturing one of our improved wheels from a plain disc of metal, preferably
soft wrought iron, or steel, or soft brass.
Fig. 2 shows by two consecutive stages, (one in dotted lines) a wheel made up
from a piece of tubing.
Fig. 3 shows by two transverse sections a wheel finished off which may be coated
with sheet brass, or other surface material as shown.
a, b, c, d, are the four stages of manufacture in Fig. 1; e, f are the stages in
Fig. 2; 9, is the hole left in the centre to receive the axle; g shows a tubular
recess which can be formed when a long axle bearing is preferred. This is however
optional, and a simple hole may be used in some cases; is a coating of sheet
brass used for appearance sake when desired.
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 :
The manufacture of hollow wheels, rollers, or runners, for furniture castors or
like purposes, from discs or tubes of metal, by means of presses, dies, and suitable
.tools, as herein described and set forth.
Dato
1000
S. S. BROMHEAD,
97, Newgate Street, London, Patent Agent.
S. S. BROMHEAD,
97, Newgate Street, London, Patent Agent.