Improvements in the Method of Casting and Stamping Aluminium and other Metal Articles.
Year: 1898

page_text: Date of Application, 11th Oct., 1898
Complete Specification Left, 8th July, 1899-Accepted, 19th Aug., 1899
PROVISIONAL SPECIFICATION.
Improvements in the Method of Casting and Stamping Aluminium
and other Metal Articles.
I WILLIAM WILKINSON, of Wordsworth House, Highfield Road, Saltley, in
the City of Birmingham, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in the method of casting and stamping
aluminium and other metal articles, the object being to produce from cast metal
an article which will have the advantages of a wrought metal production at a
reduced cost of manufacture.
In carrying my invention into effect I first cast the article to be produced in an
ordinary mould and having the usual sand or other cores arranged within,
the cores being preferably oval in shape when the ultimate form of the article
is to be circular in shape.
After having thus produced a cast article I remove the sand or other cores and
insert within a circular mandrill or plug and upon this mandrill or plug I
press or stamp the outer portion of the cast body into a circular or other desired
form by means of dies or other usual appliances at present employed for ordinary
stamping processes. The surplus metal which remains beyond that required to
form the oval into the final circular form I cut off or remove from the fin like
edge which is produced between the meeting surfaces of the dies, or pressing tools
employed.
I find this method of converting a cast socket or lug in one shape into a
pressed up or wrought like quality of metal into another shape particularly useful
for cycle parts which are at present produced by ordinary stamping and boring
out processes.
When employing aluminium I prefer to operate upon the cast metal article
when it is hot.
I employ my improved combination process of casting and stamping to articles
requiring two or more cores therein, as I insert within the core spaces solid screwed
or other mandrills upon which the dies may press the metal into the desired
shape. The ultimate shape of the article I determine by means of the shape given
to the dies and to the supporting mandrills.
I do not limit the application of my invention to any special shape of core
or to any particular form of mandrill, but I modify the shape of the core and
mandrill together with the form of compressing tools or dies to suit the nature
and thickness of the metal that is to be operated upon and the purpose for which
the manufactured article is ultimately intended.
Dated this 11th day of October 1898.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.

page_text: Improvements in the Method of Casting and Stamping Aluminium
and other Metal Articles.
I WILLIAM WILKINSON, of Wordsworth House, Highfield Road, Saltley, in
the City of Birmingham, 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 improvements in the method of casting and stamping
aluminium and other metal articles, the object being to produce from cast metal
an article which will have the advantages of a wrought metal production at a
reduced cost of manufacture.
In carrying my invention into effect I first cast the article to be produced in an
ordinary mould having (when a hollow casting is required) the usual sand or
other cores arranged within it, the casting being preferably oval when the
ultimate form of the article is to be circular in shape.
After having thus produced a cast article I remove the sand or other cores, (in
the case of a hollow casting), and insert within the casting a circular mandrel or
plug, and upon this mandrel or plug, I press or stamp the casting and convert it
into a circular or other desired form by means of dies or other usual appliances
at present employed for ordinary stamping processes. The surplus metal which
remains beyond that required to form the oval into the final circular form I
cut off or remove from the fin like edge which is produced between the meeting
surfaces of the dies or pressing tools employed.
I find this method of converting cast metal in one shape into a pressed up or
wrought like quality of metal of another shape particularly useful for cycle
parts which are at present produced by ordinary stamping and boring out
processes from rolled or drawn rods.
When employing aluminium I prefer to first operate upon the cast metal
article when it is hot, and afterwards to work it cold.
I employ my improved combination process of casting and stamping to articles
such as cycle wheel hubs and bottom brackets, requiring two or more cores therein,
and I insert within the core spaces solid screwed or other mandrels upon which the
dies may press the metal into the desired shape forming either plain or screwed
apertures according as to whether the mandrel employed is itself plain or screwed.
The ultimate shape of the article I determine by means of the shape given to the
dies and to the supporting mandrels.
I do not limit the application of my invention to any special shape of core
or to any particular form of mandrel, but I modify the shape of the core and
mandrel together with the form of compressing tools or dies to suit the nature and
thickness of the metal that is to be operated upon and the purpose for which the
manufactured article is ultimately intended.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is: -
1. The production of aluminium and other metal articles by a combination
process of casting and stamping or pressing, substantially as and for the purpose
described.
2. The conversion of the cast aluminium or other metal of a cycle part or

page_text: other article into a pressed up or wrought like quality of metal, substantially as
described.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and 25, Cross Street, Manchester,
Agents for the Applicant.