Improvements in the Manufacture of Metal Tubes and in the Machinery for the said Manufacture.
Year: 1894

page_text: Date of Application, 25th June, 1894
Complete Specification Left, 25th Mar., 1895-Accepted, 18th May, 1895
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Metal Tubes and in the
Machinery for the said Manufacture.
We, ROBERT WOOTTON, of Harborne Road, Edgbaston, Birmingham in the
County of Warwick, Gentleman, and LEWIS WILLIAM GOOLD, of King's Heath,
Birmingham, in the County of Warwick, Architect and Surveyor do hereby
declare the nature of our said invention to be as follows
:—
Our invention has for its object improvements in the manufacture of metal tubes
and in the machinery for the said manufacture and which refers in particular to
that portion of the process in which after reducing the tube down upon a mandrel
the mandrel has to be withdrawn and in doing which considerable difficulties have
been experienced. Our method is as follows:-
We form a machine consisting of two tables the upper one being mounted upon
rollers a little way above the other and mounted face to face and so that the two
faces are sufficiently apart when the upper table rests upon the rollers to exert
pressure upon the thinnest tube required to be operated upon. The face of the
tables are provided with a series of corrugations or ridges which run diagonally
across the face so that as a tube with its mandrel thereon is passed between the
tables and one of the tables moved, the tube is rolled all over its outer surface by
the ridges and enlarged in its circumference and the tube is not only enlarged but
it is improved both in quality. The table or tables may be reciprocated by any
convenient mechanical means. After the enlargement the mandrel may be
removed without difficulty. One, or more than one, tube and mandrel may be
operated upon at the same time and the operation may continue a shorter or longer
period as the quality and condition of the metal may require.
A similar effort may be produced in a slower manner by revolving the tube upon
its own axis in bearings or upon a centre or between centres. While thus revolved
a sliding tool holder is traversed from end to end of the tube as many times as
may be required to increase its diameter and improve its surface or the texture of
the metal. The tool holder carries one or more bearings which embrace the tube
while a friction surface is brought to bear against the revolving tube upon the
mandrel and is traversed by suitable gear from end to end. The friction surface
or tool may consist of a more or less rounded point or of a friction wheel or roller
and a corresponding tool or surface may be set against the other side for the same
purpose. By this means the metal of the tube is extended and the circumference
increased after which the mandrel may be withdrawn.
Deted this 23rd der of June 1801
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicants.

page_text: Improvements in the Manufacture of Metal Tubes and in the
Machinery for the said Manufacture.
We, ROBERT WOOTTON, of Harborne Road, Edgbaston, Birmingham, in the
County of Warwick, Gentleman, and LEWIS WILLIAM GOOLD, of King's Heath,
Birmingham, in the County of Warwick, Architect and Surveyor, do hereby
declare the nature of our said invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement :-
Our invention hins for its object improvements in the manufacture of metal tubes
and in the machinery for the said manufacture and which refers in particular to
that portion of the process in which, after reducing the tube down upon a mandrel,
the mandrel has to be withdrawn and in doing which considerable difficulties have
been experienced. Our method is as follows:-
We form a machine consisting of two tables the upper one being mounted upon
rollers a little way above the other and mounted face to face, and so that the two
faces are sufficiently apart when the upper table rests upon the rollers to exert
pressure upon the thinnest tube required to be operated upon. The face of the
tables are provided with a series of corrugations or ridges which run diagonally
across the face so that as a tube with its mandrel thereon is passed between the
tables and one of the tables moved the tube is rolled all over its outer surface by
the ridges and enlarged in its circumference, and the tube is not only enlarged but
it is improved in quality. The table or tables may be reciprocated by any
convenient mechanical menus. After the enlargement the inaudrel may be
removed without difficulty. One, or more than one tube and mandrel, may be
operated upon at the same time and the operation may continue a shorter or longer
period as the quality and condition of the metal may require. A similar effect
may be produced in a slower manuer by revolving the tube upon its own axis in
bearings or upon a centre or between centres. While thus revolved a sliding tool
holder is traversed from end to end of the tube as many times as may be required
to increase its diameter and improve its surface or the texture of the metal. The
tool holder carries one or more bearings which embrace the tube while a friction
surface is brought to bear against the revolving tube upon the mandrel & is
traversed by suitable gear from end to end. The friction surface or tool may
consist of a more or less rounded point or of a friction wheel or roller & a corre-
sponding tool or surface may be set against the other side for the same purpose.
By this means the metal of the tube is extended and the circumference increased
after which the mandrel may be withdrawn.
In order that our invention may be clearly understood and more casily carried
into practise we have appended hereunto a double sized sheet of drawings upon
which we have fully illustrated the nature of our said improvements together with
the mode of and means for carrying the same into effect.
Figure 1., is a sectional front elevation through the bed of one of our machines.
Figure 2., is a sectional plan of the lower bed with the top part of machine
removed.
Figure 3., is a side elevation of Figure 1.
Figure 4., is a section through Figure 1 on the line 1-2.
Figure 5, is a plan showing the mode of carrying our modification into effect.
Our machine consists of two tables A and B, the upper one being mounted upon
rollers a' and a' a little above the other and mounted face to face so that the two
faces are sufficiently apart when the upper table rests upon the rollers to exert
pressure upon the thinnest tube required to be operated upon. The face of the

page_text: tables are provided with a series of corrugations or ridges a³ and ³ which run
diagonally across the face so that as a tube E with its mandrel thereon is passed
between the tables, and one of the tables reciprocated the tube is rolled all over its
outer surface by the ridges and enlarged in its circumference & the tube is not
only enlarged but it is also improved in quality. The table or tables may be
reciprocated by any convenient mechanical means such as the racks a' which are
operated upon by the tooth wheels F the said tooth wheels being mounted upon
the shaft F which is operated by the eccentric or crank H through the rod .J and
crank K by which means the crank is given a sufficient motion to turn the wheels F
backwards and forwards to give the required travel to the table or the eccentric
may be connected direct to a pin or support L from a vertical shaft to reciprocate
the table B in a similar manner a couple of rollers M may be provided for pressing
upon the back of the top table to add pressure in which case provision may be
made to bring pressure to bear on the bearings of the shafts of such rollers if
required. Any suitable hopper S may be provided to allow of the tubes being fed
in. After the enlargement the mandrel may be removed without difficulty. One,
or more than one tube E and mandrel may be operated upon at the same time and
the operation may continue for a shorter or longer period as the quality and
condition of the metal may require.
A similar effect inay be produced in a slower manner by revolving the tube E
upon its own axis in bearings N, N' such as that of an ordinary lathe or upon a
centre or between centres. While thus revolving a sliding tool holder V is
traversed from end to end of the tube E as many times as may be required to
increase its diameter and improve its surface or the texture of the metal. The
tool holder carries one or more bearings and which embrace the tube while a
friction surface P is brought to bear against the revolving tube E upon the
mandrel and is traversed by suitable gear such as the worm rod R from end to
end. The friction surface or tool P may consist of a more or less rounded point or
of a friction wheel or roller and a corresponding tool or surface may be set against
the other side for the same purpose. By this means the metal of the tube is
extended and the circumference increased after which the mandrel may be with-
drawn. We are aware that it has been previously proposed to free tubes from
their mandrel after manufacture and we do not claim such use generally but
Having now particularly described & 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 :-
:―
1st. The improvements in the manufacture of metal tubes and in the machinery
for the said manufacture substantially as & for the purpose herein set forth &
shown upon the accompanying drawings.
2nd. The machinery for releasing tubes from their mandrels consisting of a
corrugated table A in combination with a corrugated reciprocating table B for
rolling the tubes all over their outer surfaces substantially as & for the purpose
herein set forth and shown upon the accompanying drawings.
3rd. Releasing tubes from their mandrels by revolving such tubes
ceutres against travelling friction tools or rollers substantially as and for the
purpose herein set forth and shown upon the accompanying drawings.
Dated this 23rd day of March 1895.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicants.