Improvements in the Manufacture of Seamless Steel and Iron Tubes.
Year: 1899

page_text: Date of Application, 19th July, 1899
Complete Specification Left, 3rd Mar., 1900-Accepted, 14th July, 1900
PROVISIONAL SPECIFICATION.
-
Improvements in the Manufacture of Seamless Steel and Iron Tubes.
I, ISAAC LEA KEMPSON, of 59, Lightwoods Road, Bearwood, near the City of
Birmingham, do hereby declare the nature of this invention to be as follows:-
This invention relates to the manufacture of seamless or solid-drawn steel and
iron tubes and has for its objects, to reduce the cost of manufacture and to
decrease the number of annealings, picklings and passes through dies required to
produce a finished tube either by reducing the bore and extending the walls and
reducing the thickness of the walls of the tube by expanding and lengthening
the billet, which, in the latter case is prepared internally and externally as herein-
after described.
I am aware that it has heretofore been proposed to reduce the number of anneal-
ings, picklings and passes required by coating the surface of the tube with tin
or terne metal, but this process is expensive and I therefore according to my
present invention, propose to coat the surfaces of the tube or billet to be operated
upon with an inexpansive and labor-saving solution which acts as a lubricant
and buffer between the billet or tube and the dies. Futher it is understood that
when the dies come into direct contact with the tube or billet, the constitution of
the surface metal is changed from a fibrous to a crystallized character, but by the
interposition of an interposed moderator, such direct contact is prevented and
the structural character of the metal is unimpaired.
According to my invention, the billet or tube to be operated upon is first
immersed in a bath of sulphate of copper and water solution and by the chemical
exchange which takes place between the iron of the tube and chemical action of
the solution, there is deposited upon the said tube a coating which acts as a lubri-
cant and moderant of the direct pressure of the dies, in manner and for the pur-
pose above referred.
After a coated tube has been passed once, or a number of times through the
dies, it may be re-coated or it may be re-coated after every pass.
Improvements in the Manufacture of Seamless Steel and Iron Tubes.
I, ISAAC LEA KEMPSON, of 59, Lightwoods Road, Bearwood, near the City of
Birmingham, do hereby declare the nature of this invention and in what manner
Price 8d1

page_text: 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 seamless or solid drawn steel and
iron tubes and has for its objects, to reduce the cost of manufacture and to
decrease the number of annealings picklings and passes through dies required to
produce a finished tube either by reducing the bore and extending the walls and
reducing the thickness of the walls of the tube by expanding and lengthening
the billet, which in the latter case is prepared internally and externally as herein-
after described.
I am aware that it has heretofore been proposed to reduce the number of anneal-
ings, picklings and passes required by coating the surface of the tube with tin
or terne metal, but this process is expensive and I therefore according to my
present invention, propose to coat the surface of the tube or billet to be operated
upon by means of an inexpensive and labour-saving solution, which acts as a lubri-
cant and buffer between the billet or tube and the dies. Further it is understood that
when the dies come into direct contact with the tube or billet, the constitution of
the surface metal is changed from a fibrous to a crystallized character, but by the
interposition of an interposed moderator, such direct contact is prevented and
the structural character of the metal is unimpaired.
According to my invention, the billet or tube to be operated upon is first
immersed in a bath of sulphate of copper solution and by the chemical exchange
which takes place between the iron of the tube and the sulphate of copper of the
solution, there is deposited upon the said tube a coating which acts as a lubri-
cant and a moderant of the direct pressure of the dies, in manner and for the
purpose above referred.
After a coated tube has been passed once, or a number of times through the
dies, it may be re-coated, or it may be re-coated after every pass.
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-
In the manufacture of iron and steel tubes, immersing the billets or partially
formed tubes prior to passing the same through dies or otherwise operating
upon the same in a bath of sulphate of copper in solution, whereby the same
become coated with a deposit substantially as and for the purpose herein described
and set forth.
Q
1000
ISAAC LEA KEMPSON.
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicant.