IMPROVE- MENTS IN THE MANUFACTURE OF METAL TUBES
Year: 1865

page_text: LETTER'S PATENT to Philip Albert Muntz, of Keresley, near Coventry,
in the County of Warwick, Gentleman, for the Invention of "IMPROVE-
MENTS IN THE MANUFACTURE OF METAL TUBES."
Sealed the 11th May 1866, and dated the 5th December 1865.
PROVISIONAL SPECIFICATION left by the said Philip Albert Muntz at
the Office of the Commissioners of Patents, with his Petition, on the
⚫ 5th December 1865.
I, PHILIP ALBERT MUNTZ, of Keresley, near Coventry, in the County of
Warwick, Gentleman, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN THE MANUFACTURE OF METAL TUBES," to be as follows:-
My Invention consists of improvements in the process of manufacturing
metal tubes described in the Specification of a Patent granted to George
Frederick Mantz, junior, on the 8th day of May 1852, and numbered 14,117.
The said process consists essentially in, firstly, casting a short thick tube;
secondly, rolling the said short thick tube between plain rolls thereby flatten-
ing and lengthening it; thirdly, partially opening the flattened tube so as to
give it a nearly elliptical figure in cross section; fourthly, cutting off the
fin or web which is formed on either edge, and, lastly, giving a cylindrical.
figure to the tube by means of rolls having semicircular grooves in them,.
the tube requiring to be heated to redness prior to each rolling process.

page_text: The said process is especially applicable to the manufacture of tubes from
the alloys of copper and zinc, commonly called Muntz's metal.
My Invention consists of the improvements herein-after described in the
said process whereby one rolling process is rendered unnecessary, and the
waste produced by the cutting off of the fins or webs is avoided.
I conduct the manufacture of the tubes in the following manner:-I first cast
the short thick hollow tube in the ordinary way, I next roll it flat in the
ordinary way; afterwards pass the flattened tube through a pair of rolls
having grooves semicircular in cross section, the said rolls being provided with
a mandril for opening the flattened tube. By passing the flattened tube
through the rolls last described it is directly converted into a cylindrical tube,
or the flattened tube may be partially opened by means of rolls having semi-
elliptical grooves in them, the longer axis of the ellipse being in a plane
perpendicular to the axis of the rolls. By these rolls the flat tube is opened
without the formation of fins. The elliptical tube is finally passed through the
rolls having semi-cylindrical grooves, and thereby made into a cylindrical
tube; I prefer however to convert the flattened tube directly into a cylindrical
one as previously described.
SPECIFICATION in pursuance of, the conditions of the Letters Patent, filed
by the said Philip Albert Muntz in the Great Seal Patent Office on
the 24th May 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PHILIP
ALBERT MUNTZ, of Keresley, near Coventry, in the County of Warwick,.
Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fifth day of December, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-ninth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Philip Albert Muntz, Her special licence that I, the said Philip
Albert Muntz, my executors, administrators, and assigns, or such others as
I, the said Philip Albert Muntz, my 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
"IMPROVEMENTS IN THE MANUFACTURE OF METAL TUBES," upon the condition

page_text: (amongst others) that I, the said Philip Albert Muntz, my executors or
administrators, by an instrument in writing under my, or their, or one of
their hands and seals, 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 Philip Albert Muntz, 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 :-
My Invention consists of improvements in the process of manufacturing
metal tubes described in the Specification of a Patent granted to George
Frederick Munta; junior, on the 8th day of May 1852, No. 14,117. The
said process consists essentially in, firstly, casting a short thick tube; secondly,
rolling the said short thick tube between plain rolls, thereby flattening and
lengthening it; thirdly, partially opening the flattened tube so as to give it
a nearly elliptical figure in cross section; fourthly; cutting off the fin or
web which is formed on either edge; and, lastly, giving a cylindrical figure to
the tube by means of rolls having semicircular grooves in them, the tube
requiring to be heated to redness prior to each rolling process; the said
process is especially applicable to the manufacture of tubes from the alloys of
copper and zine, commonly called Muntz's metal.
My Invention consists of the improvements herein-after described in the
said process, whereby one of the rolling processes is rendered unnecessary,
and the waste produced by the cutting off of the fins or webs is avoided.
I conduct the manufacture of tubes in the following manner:-1 first cast
the short thick hollow tube in the ordinary way; I next roll it flat or nearly
flat in the ordinary way; I afterwards pass the flattened tube through a pair
of rolls having grooves semicircular in cross section, the said rolls being pro-
vided with a mandril for opening the flattened tube. By passing the flattened
tube through the rolls last described it is directly converted into a cylindrical
tube; or the flattened tubė may be partially opened by means of rolls having
semi-elliptical grooves in them, the longer axis of the ellipse being in a plane
perpendicular to the axis of the rolls. By these rolls the flat tube is opened
without the formation of fins. The elliptical. tube is finally passed through
the rolls having semi-cylindrical grooves, and thereby made into a cylindrical
tube; I prefer, however, to convert the flattened tube directly into a cylindrical
one, as previously described.

page_text: Having explained the nature of my Invention I will proceed to describe,
with reference to the accompanying Drawing, the manner in which the same:
is to be performed.
I first cast a short thick hollow tube of the section represented in Figure 1,
the process of casting being conducted in the ordinary way. I take the short
thick hollow tube, Figure 1, and pass it through a pair of rolls so as to flatten
and elongate it, and give it the form represented in section in Figure 2, the
edges or sides being somewhat thicker than the middle of the flattened tube
as represented. The grooves of the flattening rolls have the form represented.
in the section of a pair of rolls, Figure 3, so as to give to the tubes passed
between them the thickened edges represented. The flattened tube, Figure 2,
is afterwards passed through the pair of rolls represented in front elevation
in Figure 4, and longitudinal section in Figure 5; the said rolls have semi-
circular grooves a in them, and are provided with a stationary mandril 6,
having a pointed end for opening the flattened tube: By passing the flattened
tube, Figure 2, through the semicircular grooves a of the rolls, Figures 4.
and 5, the said flattened tube is directly converted into a cylindrical tube, as.
represented in Figure 6. I prefer to present the flattened tube, Figure 2,
to the mandril and rolls in a vertical plane, as indicated in dotted lines in
Figure 4.
Instead of the combination of processes described the following may be
adopted. I first partly open the flattened tube, Figure 2, by means of rolls
provided with a mandril, the said rolls having semi-elliptical grooves in them,
the longer axis of the ellipse being in a plane perpendicular to the axis of the
rolls. An elevation of these rolls is represented in Figure 7. By the use of
these rolls the flattened tube is opened without the formation of fins. The
elliptical tube thus produced is finally passed through the rolls represented in
Figures 4 and 5 having semi-cylindrical grooves, and thereby made into a
cylindrical tube. The tubes are rolled at a red heat, the rolling being effected
in the ordinary way.
By conducting the manufacture of metal tubes according to my Invention I
dispense with one of the rolling processes and avoid the waste produced by
cutting off the fins or webs; or I employ the ordinary rolling processes and
avoid the waste produced by cutting off the fins or webs.
Having now described the nature of my Invention, and the manner in
which the same is to be performed, I wish it to be understood that I do not
limit myself to the precise details herein described and illustrated in the
Drawing, as the same may be varied without departing from the nature of my
Invention; but I claim as my Invention the improvements in the manufacture

page_text: of metal tubes herein-before described and illustrated in the accompanying
Drawing, that is to say, manufacturing metal tubes by first casting short thick
hollow tubes, flattening and elongating the said tubes, and finally opening out
and at the same time directly converting the said flattened tubes into cylindrical
tubes by passing them through rolls provided with semicircular grooves in
cross section, or opening out the flattened tubes without the formation of fins
or webs by means of rolls having semi-elliptical grooves arranged in the
manner described and represented, and making the elliptical tubes into cylin-
drical tubes by passing them through rolls provided with semicircular grooves
in cross section,
In witness whereof, I, the said Philip Albert Muntz, have hereunto set
my hand and seal, this Eighteenth day of May, in the year of our
Lord One thousand eight hundred and sixty-six.
Witness,
GEORGE SHAW.
PHILIP ALBERT MUNTZ. (L.B.)