IMPROVEMENTS, IN MA- CHINERY FOR ORNAMENTING METAL TUBES."" CHIY FOR
Year: 1865

page_text: LETTERS PATENT to George Burt, of Birmingham, in the County of
Warwick, Manufacturer, for the Invention of "IMPROVEMENTS, IN MA-
CHINERY FOR ORNAMENTING METAL TUBES.""
CHINERY FOR ORNAMENTING METAL TUBES."
Sealed the 29th September 1865, and dated the 1st April 1865.
PROVISIONAL SPECIFICATION left by the said George Burt at the Office
of the Commissioners of Patents, with his Petition, on the 1st April
1865.
İ, GEORGE BURT, of Birmingham, in the County of Warwick, Manufacturer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
MACHINERY FOR ORNAMENTING METAL TUBES," to be as follows, that is,
to say:-
This machinery is intended to be employed chiefly in reeding, fluting,
grooving, or otherwise ornamenting taper tubes, but it can also, with slight
modifications, be used for ornamenting tubes with parallel sides. I construct
a machine consisting of two standards or holsters, to which is attached a slide
bed or slide rods, upon which a slide rest works by means of suitable toothed
wheel and screw gearing fixed upon one or both of the standards, the screws
passing through the slide rest. A mandril is secured, or when not secured is
attached to one standard, upon which mandril the tube to be operated upon is.
placed; this mandril passes through the slide rest, and extends any required
length; for tapered tubes the mandril is tapered, and a series of tapered guide
rods are fixed by set screws in the second standard exactly equidistant from

page_text: the centre, which is the point where the tube mandril is placed; these guide
rods pass through slots in the slide rest, which slots carry cutter blocks, in
which are mounted small wheels or cutters free to revolve (if necessary), or
fixed cutters may be employed if preferred. These cutters all converge
towards the centre of the slide rest, and bear upon the tube, which with its
mandril passes through that centre. When the wheels are used they may
have upon their peripheries beads or grooves, or sunk or raised devices
according to the design intended to be produced on the tube. The bearing
of these cutters upon the tube is governed by the guide rods, which have their
under edges of a V form, bearing in grooves of the same form upon the head
of each cutter block, the upper edges of the guide rods being plain to admit
of the bearing of adjusting screws, which pass through the thickness of the
slide rest, and thus bearing upon the guide rods; these in their turn bear upon
the cutter blocks, and keep the cutters down upon the tube; it follows, that
as the machine is worked the slide rest, with its cutting apparatus, com-
mences at the smaller end of the tube, and the larger ends of the guide rods;
or this operation may be reversed, the axial lines of the tube mandril and of
the guide rods being always parallel. In producing the rope twist pattern or
any other device running helically round the tube, the, tube, with its mandril,
must be left free to revolve on its bearing in the first standard, and the cutters
must be mounted at the desired angle in the slide rest, which is readily done
by means of suitable adjusting screws. For some purposes one guide rod
only will suffice, or a mandril or series of mandrils may be employed instead
of the guide rods. When one guide rod or mandril only is used I employ a
ring working on the face of the slide rest, in the inner periphery of which
ring are cams or eccentrics governing the cutter blocks and cutters by means
of adjusting screws.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Burt in the Great Seal Patent Office on the 30th
September 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE.
BURT, of Birmingham, in the County of Warwick, Manufacturer, send.
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the First day of April, in the year. of our Lord One
thousand eight hundred and sixty-five, in the twenty-eighth year of Her reign,

page_text: did, for Herself, Her heirs and successors, give and grant unto me, the said
George Burt, Her special licence that I, the said George Burt, my executors,
administrators, and assigns, or such others as I, the said George Burt, 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 MACHINERY FOR
ORNAMENTING METAL TUBES," upon the condition (amongst others) that I, the
said George Burt, by an instrument in writing under my hand and seal,
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 George Burt, do hereby declare the
nature of my said Invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement,
reference being had to the Drawings hereunto annexed, and to the letters
and figures marked thereon, that is to say:-
This machinery is intended to be employed chiefly in reeding, fluting,
grooving, or otherwise ornamenting taper tubes, but it can also, with slight
modifications, be used for similarly ornamenting tubes with parallel sides.
I construct a machine consisting of two standards or holsters, to which is
attached a slide bed or slide rods, upon which a slide rest works by means of
suitable toothed wheel and screw gearing fixed upon one or both of the
standards, the screws passing through the slide rest. A mandril is secured, or
when not secured is attached to one standard, upon which mandril the tube to
be operated upon is placed; this mandril passes through the slide rest, and
extends any required length. For tapered tubes the mandril is tapered, and
a series of tapered guide rods are fixed by set screws in the second standard,
exactly equidistant from the centre, which is the point where the tube mandril
is placed; these guide rods pass through slots in the slide, and which slots
carry cutter blocks, in which are mounted small wheels or cutters free to
revolve (if necessary), or fixed cutters may be employed if preferred. These
cutters all converge towards the centre of the slide rest, and bear upon the
tube, which with its mandril passes through that centre. When the wheels
are used they may have upon their peripheries beads or grooves, or sunk or
raised devices, according to the design intended to be produced on the tube. The
bearing of these cutters upon the tube is governed by the guide rods, which

page_text: the larger ends of the
axial lines of the tube
In producing the rope
For some
have their under edges of a V form, bearing in grooves of the same form upon
the head of each cutter block, the upper edges of the guide rods being plain
to admit of the bearing of adjusting screws, which pass through the thickness
of the slide rest, and thus bearing upon the guide rods; these in their turn
bear upon the cutter blocks and keep the cutters down upon the tube. It
follows that as the machine is worked the slide rest, with its cutting appa-
ratus, commences at the smaller end of the tube, and
guide rods; or this operation may be reversed, the
mandril and of the guide rods being always parallel.
twist pattern, or any other device running helically round the tube, the tube,
with its mandril, must be left free to revolve on its bearing in the first
standard, and the cutters must be mounted at the desired angle in the slide
rest, which is readily done by means of suitable adjusting screws.
purposes one guide rod only will suffice, or a mandril or series of mandrils
may be employed instead of the guide rods. When one guide rod or mandril
only is used I employ a ring working on the face of the slide rest, in the inner
periphery of which ring are cams or eccentrics, the cutter blocks and cutters
being governed by means of adjusting screws; this will be more readily
comprehended by a reference to the accompanying Drawings, in which
Figure 1 shews the slide rest which may be used in a lathe such as is employed
for cutting screws, or which may be made to suit other forms of lathe or
similar machine if preferred. The guides (a), which receive the sliding
holders (b) of the cutter blocks (c), are cast upon the face of the vertical
portion (d) of the slide, rest, and are so arranged as to be adjustable by means
of set pins (d'). Figure 2 shews a cam or excentric ring, which is attached
to the front of the slide rest, Figure 1, the pins (e) working inside the cam,
and the pins (e) in the slots (f).. A lever and weight, or lever and handle (a)
or other suitable appliance is used to partially revolve the excentric ring, the
action of which is to force the cutters towards the centre, and maintain their
equidistance from the centre. A block (9) is cast upon the periphery of the
excentric to form a bearing for a guide rod, which guide rod is fixed between
the two headstocks, and must be adjusted to suit parallel or taper tubes by
merely raising one end only in the case of taper tubes. (h) are the cutters or
beading wheels, which are shewn as rollers, but which may be fixed cutters
if preferred; they are mounted in the cutter blocks (c), being adjusted by the
set screws (i); the bearing of these cutters is shewn as upon the tube (j),
which may be supported by a mandril or not. The pieces (k) are cast upon
the part (d), and their inner surface is truly turned to receive the ring,
Figure 2. The washers (7). are secured by bolts to the top surfaces of the

page_text: pins (e), see full size section on line C, D; the object of these washers is to
keep the excentric ring, Figure 2, in place. A nut box (m), which may be
either solid or similar to those used in screw cutting lathes is attached to any
convenient part of the slide rest; I prefer it in one piece, as shewn in
Figure 1. The speed of the screw is regulated by means of change wheels, so
that when the tube (j) revolves by the circular motion imparted to it through
the headstock, either a coarse or fine pattern may be worked upon the tube
by merely varying the change wheels.
The cutters are for convenience shewn in the Drawing geometrically; they
can be placed at any desired angle, as the upper portion of the cutter block (c)
is turned so as to fit perfectly the hole (c¹) shewn in section on line C, D,
in the sliding block (6); when set in position, they can be secured by means
of the pins (i).
In the section on line C, D, the pins (e) are shown as forged in the
sliding piece (6).
Figure 3 shews a part side elevation of the slide rest.
Having thus described the nature of my said Invention, and in what manner
the same is to be performed, I claim, without limiting myself to these precise
details, the improvements in machinery for ornamenting metal tubes, sub-
stantially as herein more fully set forth and specified.
In witness whereof, I, the said George Burt, have hereunto set my
hand and seal, this Twenty-seventh day of September, in the year of
our Lord One thousand eight hundred and sixty-five.
GEORGE (L.8.) BUKI.