Improvements in the Manufacture of Wheels and Pulleys.
Year: 1895

page_text: Date of Application, 20th Aug., 1895
Complete Specification Left, 21st May, 1896-Accepted, 27th June, 1806
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Wheels and Pulleys.
I WILLIAM MALAM of 911 Ashton Old Road, Fairfield, near Manchester, in
the County of Lancaster, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the manufacture of wheels and pulleys from steel or
iron or other metal or similar material, and the invention consists in manufacturing
the rim and the disc (or arms or spokes) of the pulley from a disc or plate so us to
form a weldless disc-wheel or pulley. I may form the wheel or pulley from a disc
by first turning up a flange at the edge of the disc and then forcing the disc inwards
to or near to or beyond the central part of the flange which forms the rim of the
wheel or pulley. The disc may subsequently be provided with a boss or bosses to
form the boss or hub of the wheel or pulley in any suitable manner.
In this case I may take a circular plate or disc of steel or iron heated to the
required temperature, and place it upon a die forming a circular space of suitable
diameter fixed between two hydraulic rams which are provided with specially
shaped heads or ends.
During the first part of the operation the lower ram remains stationary and the
upper ram forces the disc into the die, thus turning up the metal into a flange around
the edge of the disc. The upper die is then withdrawn and raised until a loose
ring of suitable form can be placed in the die and rest upon the ledge formed by
the edge of the flange on the disc being operated on; the upper die is then brought
down until a shoulder thereon meets the upper part of the loose ring in which
position its further motion downwards or upwards is arrested and a space left
between the disc and the bottom of the upper ram.
The lower ram the top of which is rather larger (say about inch larger) in
diameter than the lower part of the upper ram, is then forced upwards displacing
the disc and forcing it into a central or nearly central position in the metal ring or
flange. The difference in diameter of the two rams prevents the disc from being
sheared or separated from the rim. Or the die may be made so deep that the
lower ram may be always stationary and the ring above named may force the flange
apon the disc downwards into a recess formed by a shoulder on the die and the
upper part of the lower ram.
Or the disc may be held fixed between two rams at its central part and the flange
or rim upset around the edge, by rolling or otherwise.
If the wheel is very large in diameter it may be made in segments in a similar
nanner to that above described, and such segments can be connected together and
o a boss or bosses by suitable means.
Dated this 19th day of August 1895.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.

page_text: Improvements in the Manufacture of wheels and Pulleys.
I WILLIAM MALAM of 911 Ashton Old Road, Fairfield, near Manchester, iu
the County of Lancaster, 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:-
This invention relates to the manufacture of wheels and pulleys from steel or
iron or other metal or similar material and the invention consists in manufacturing
the rim and the disc (or arms or spokes) of the pulley from a disc or plate so as to
form a weldless disc-wheel or pulley.
My invention will be readily understood on reference to the sheet of drawings
hereunto annexed and the following explanation thereof.
According to my invention I may form the wheel or pulley from a disc or plate
by first turning up the edge of the disc all round, and then forcing the disc inwards
to, or near to, or beyond the central part of the flange which forms the rim of the
wheel or pulley, so that a part of the rim or flange projects on each side of the disc
as illustrated by Figs. 1 and 2 on the annexed drawing.
In this case I take a circular plate or disc a of steel or iron (preferably upset or
thickened round the edge in the manner shown) heated to the required temperature,
and I place it upon a die 6 forming a circular space of a suitable diameter fixed
between two hydraulic rams c and c¹ which are provided with specially shaped¹
heads or ends.
During the first part of the operation the lower ram c remains stationary and
the upper ram e forces the disc a into the die 6 thus turning up the metal into a
flange round the edge of the disc as shown by the dotted lines on Fig. 1. The
upper rame is then withdrawn and raised up until a loose ring or block d of
suitable form (see Fig. 2) can be placed in the die b and rest upon the ledge formed
by the edge of the flange on the disc a being operated on; the upper ram c is then
brought down until the shoulder a thereon (see Fig. 1) meets the upper part of the
loose ring d in which position its further motion, downwards or upwards, is arrested
and a space e left between the disc a and the bottom of the upper ram c as seen at
Fig. 2.
The lower ram c¹ the top of which is rather larger (say about inch larger) in
diameter than the lower part of the upper ram c, is then forced upwards displacing
the disc a, and forcing it upwards, into a central or nearly central position in its
metal rin or flange as shown by the dotted line on Fig. 2.
The difference in diameter of the two rams prevents the disc a from being
sheared or separated from the rim. The section thus given to the wheel or pulley
is shown at Fig. 3.
Or the die 6 may be made so deep that the lower ram c³ may be always stationary
and the ring d above named may force the flange upon the edge of the disc a into a
recess formed by a shoulder formed on the die and the upper part of the lower
ram c¹.
Or I may proceed as illustrated by Fig. 4 in which case the lower die c' always
remains stationary. When the single rim or flange has been formed round the edge
of the disc a (as shown at Figs. 1 and 2) I raise the upper ram c and turn the
disc
4 over with the flange downwards (as seen at Fig. 4) and without placing the
loose ring d thereon I bring the upper ram e down again so as to force the central
part of the disc downwards (as shown by the dotted line).
Or the disc a may be held fixed say between two rains at its central part and the
flange or rim upset round the edge by rolling or otherwise, this operation is
illustrated at Fig. 5, showing the wheel completed in three stages.
If the wheel or pulley is very large in diameter it may be made in segments in a

page_text: similar manner to that above described, and such segments can be connected'
together and to a boss or bosses by suitable means.
"
I sometimes "sweat or braze a boss or bosses onto the disc wheel or pulley as.
shown dotted at Figs. 3 and 5, but in other cases I may in the first instance make
a disc or bloom with a thickened centre as shown at Fig. 6, and then reduce the
thickness and increase the diameter of the said disc, and then turn up the flanges.
at the edge in the manner previously described.
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 :-
First. A disc-wheel or pulley made from a circular plate (which is preferably
upset or thickened at the required distance from the edge) by first turning up a
flange all round the edge and then forcing the central portion to about the centre
of such flange substantially as hereinbefore described and illustrated by Figs. 1, 2,.
3 and 4 of the annexed drawings.
Secondly. I claim a disc-wheel or pulley made from a circular plate the edge of
which is upset or thickened so as to form a flange or rim on the said wheel or pulley
substantially as herein before described and illustrated by Fig. 5.
Thirdly. I claim as my invention a disc wheel or pulley made from a solid disc-
or bloom with a thickened centre and reducing and turning up the edge into the
form of a double flange or rim substantially as hereinbefore described and illustrated.
by Fig. 6 on the annexed drawing.
Dated this 19th day of May 1896.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.