Improvements relating to the Drawing of Tubes, Wire, and the like.
Year: 1897

page_text: Date of Application, 20th July, 1897
Complete Specification Left, 20th Apr., 1898-Accepted, 25th June, 1898
PROVISIONAL SPECIFICATION.
Improvements relating to the Drawing of Tubes, Wire, and the like.
I, ALFRED CECIL WRIGHT, of the Firm of James Warne, of Watery Lane, in
the City of Birmingham, Manufacturer, do hereby declare the nature of this
invention to be as follows:-
This invention consists of improvements relating to the drawing of tubes, wire,
and the like, my object being to reduce the wear and tear of the dies and other
tools and the amount of power or energy required for the drawing operation.
I prepare my improved dies preferably from metal such as is employed for
malleable cast iron, but I dispense with the usual annealing process. Before
placing the die in position upon the draw bench or similar machine, I dip the
same in a bath of molten metal formed from a mixture of lead and tin, and I
then draw through the die a dummy tube or mandrel for the purpose of forcing
A film of soft metal
the soft alloy into the working surface of the iron die.
serving as a lubricating material in thus disposed between the iron and the exterior
surface of the tubes subsequently drawn through the die, and by such inter-
posing material combined with the die in the manner described, the working life
of the latter is increased whilst the tubes can be drawn with a less expenditure
of power or energy.
In like manner I coat the mandrels or other tools with a soft metal or alloy
and compress the same into the surface of the iron or steel from which the tool
is formed.
I also treat dies formed from steel plates with the tinning or soft metal coating
and the subsequent compressing process whereby such soft metal is consolidated
with the harder metal forming the body of the die.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.
Improvements relating to the Drawing of Tubes, Wire, and the like.
I, ALFRED CECIL WRIGHT, of the Firm of James Warne, of Watery Lane, in
the City of Birmingham, Manufacturer, 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 consists of improvements relating to the drawing of tubes, wire,

page_text: and the like, my object being to reduce the wear and tear of the dies and other
tools and the amount of power or energy required for the drawing operation.
I prepare my improved dies in the ordinary form preferably from metal such
as is employed for malleable cast iron, but I dispense with the usual annealing
process. Before placing the die in position upon the draw bench or similar
machine, I dip the same in a bath of molten anti-friction metal preferably formed
from a mixture of four parts lead and six parts tin, and I then draw through the
die a dummy tube or mandrel for the purpose of forcing the soft alloy into the
working surface of the iron die. A film of soft metal serving as a lubricating
material is thus disposed between the iron and the exterior surface of the tubes
subsequently drawn through the die, and by such interposing material combined
with the die in the manner described, the working life of the latter is increased
whilst the tubes can be drawn with a less expenditure of power or energy.
In like manner I coat the mandrels or other tools with a soft metal or alloy and
compress the same into the surface of the iron or steel from which the mandrel
is formed by drawing the latter through a dummy die.
་་
I also treat dies formed from steel plates with the soft anti-friction metal
coating and the subsequent compressing process whereby such soft metal is con-
solidated with the harder metal forming the body of the die.
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:-
1. The treatment of dies and other tools employed in the drawing of tubes,
wire, and the like, substantially as and for the purposes described.
2. The production of dies for the drawing of tubes, wire, and the like, from
metal such as is employed for malleable cast iron and the forcing of anti-friction
metal into the working surfaces of the same, substantially as described.
3. Dies, mandrels, or other tools employed in tube drawing or like processes,
having a soft anti-friction metal consolidated with their working surfaces, sub-
stantially as and for the purposes described.
Dal 10
C A
1 1000
MARKS & CLERK,
18, Southampton Buildings, Chancery Lane, London, W.C., Agents.