A NEW OR IMPROVED METHOD OF MANUFACTURING CERTAIN KINDS OF METALLIC TUBES."
Year: 1854

page_text: LETTERS PATENT to Alfred Sohier Bolton, of Birmingham, in the County
of Warwick, Manufacturer, and Francis Seddon Bolton, of Birmingham
aforesaid, Manufacturer, for the Invention of "A NEW OR IMPROVED
METHOD OF MANUFACTURING CERTAIN KINDS OF METALLIC TUBES."
PROVISIONAL SPECIFICATION left by the said Alfred Sohier Bolton
and Francis Seddon Bolton at the Office of the Commissioners of
Patents, with their Petition, on the 10th April 1854.
We, ALFRED SOHIER BOLTON, of Birmingham, in the County of Warwick,
Manufacturer, and FRANCIS SEDDON BOLTON, of Birmingham aforesaid, Manu-
facturer, do hereby declare the nature of the said Invention for "A NEW OR
IMPROVED METHOD OF MANUFACTURING CERTAIN KINDS OF METALLIC TUBES" to
be as follows:-
Our said Invention relates to the tubes called twisted tubes, that is to say,
tubes in which a convex or concave or other flute or flutes pass round the
tube in a helical direction. We manufacture the said tubes as follows:-The
drawer plate or bur through which the tube is drawn has an internal figure,
similar to the external figure to be given to the tube, and is fixed in the axis
of a toothed wheel working on the end of the draw bench; the said toothed
wheel is geared to the endless chain by which the tube is drawn by a train of
toothed wheels or otherwise, and a plain tube being introduced into the draw

page_text: plate, and taken hold of by the plyers of the draw bench, the endless chain is
set in motion, and the tube drawn through the draw plate, the said draw
plate at the same time rotating with a velocity proper to improve the required
twist upon the tube passing through it.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Alfred Sohier Bolton and Francis Seddon Bolton in the
Great Seal Patent Office on the 9th October 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ALFRED
SOHIER BOLTON, of Birmingham, in the County of Warwick, Manufacturer,
and FRANCIS SEDDON BOLTON, of Birmingham aforesaid, Manufacturer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Tenth day of April, in the year of our Lord
One thousand eight hundred and fifty-four, in the seventeenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us, the
said Alfred Sohier Bolton and Francis Seddon Bolton, Her special licence
that we, the said Afred Sohier Bolton and Francis Seddon Bolton, our
executors, administrators, and assigns, or such others as we, the said Alfred
Sohier Bolton and Francis Seddon Bolton, our executors, administrators, and
assigns, should at any time agree with, and no others, from time to time and
at all times thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention
for "A NEW OR IMPROVED METHOD OF MANUFACTURING CERTAIN KINDS OF METALLIC
TUBES,"
upon the condition (amongst others) that we, the said Alfred Sohier
Bolton and Francis Seddon Bolton, by an instrument in writing under our
hands and seals, or under the hand and seal of one of us, should particularly
describe and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that I, the said Francis Seddon Bolton, on behalf of
myself and the said Alfred Sohier Bolton, do hereby declare the nature of the
said Invention, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement
thereof (that is to say) :-

page_text: Our Invention relates to such metallic tubes as are commonly called twisted
tubes, that is to say, tubes in which a convex or concave or other flute or
flutes pass round the tube in a helical direction, and consists in drawing a
plain or untwisted tube through a properly formed die, to which said die a
rotatory motion is communicated in the manner herein-after explained.
Figure 1 represents in side elevation, and Figure 2 in plan, a machine
constructed according to our Invention. a, a, is an ordinary draw bench; bis
the endless chain to which the forceps or plyers c are attached, by the motion
of which said chain and plyers the tube is drawn through the draw plate, as is
well understood; d is the drum over which the chain b passes, and by the
rotation of which said drum motion is communicated to the said chain; e is a
toothed wheel on the axis of the drum d; the said wheel e engages in a
pinion on the axis g, by the rotation of which said axis g motion is com-
municated through the bevil wheel h to the bevil wheel i. The axis of the
said bevil wheel i is hollow, and works in the bearing k; the draw plate or
burr through which the tube is drawn has an internal figure, similar to the
figure to be given to the exterior of the tube; the said burr, the end of which
is seen at in Figure 2, is fixed in the hollow axis of the wheel i. The end of
a plain tube m, being passed through the draw plate or burr l, is taken hold
of by the plyers c, and the druni d is set in motion. The tube m is thereby
drawn through the draw plate l, and a rotatory motion is at the same time
impressed upon the draw plate 1, the rate of rotation of the draw plate 7 being
such as is required to impress the required twist on the tube passing through
it. The ratio between the rate of motion of the chain b, and the rotation of
the draw plate or burr 1, may be determined by adjusting the relative
diameters of the wheels e, f, h, and i, or by changing, the diameter of the
drum d.
In order to counteract any tendency in the tube m to rotate, a rod n may
be inserted in the forceps c, which said rod by bearing on the bench a prevents
any such motion in the tube. Instead of effecting the rotation of the draw
plate or burr by means of toothed wheels gearing it to the drum d over
which the chain 6 passes, the said draw plate may be geared to the said
drum d, either wholly or in part, by bands and pullies, our Invention consisting
in effecting the rotation of the draw plate, by connecting it with the drum d or
chain b, apart from the mechanical arrangements, by which the said connection
may be effected.
Having now described the nature of our said Invention, and the manner of
carrying the same, into effect, we wish it to be understood that we do not
limit ourselves to the precise methods herein described, as the same may be

page_text: varied without departing from the nature of our said Invention; but we claim
as our Invention, manufacturing twisted metallic tubes by passing untwisted
tubes through a properly formed draw plate or burr, to which said draw plate
or burr a rotatory motion is communicated by the motion of the chain or drum
of the draw bench, as herein described and illustrated in the accompanying
Drawing.
In witness whereof, I, the said Francis Seddon Bolton, have hereunto
set my hand and seal, this Seventh day of October, in the year of our
Lord One thousand eight hundred and fifty-four.
Witness,
RICHARD SKERRETT.
FRANCIS SEDDON BOLTON. (L.S.)