AN APPARATUS FOR BENDING OR FORMING LEAD COPPER, IRON, AND OTHER SUITABLE METAL TUBING INTO BENDS COILS AND SPIRALS OF VARIOUS SHAPES AND DESIGNS OR PATTERNS
Year: 1883

page_text: LETTERS PATENT to Thomas Drake of Huddersfield in the County of York,
Solicitor for an Invention of "AN APPARATUS FOR BENDING OR FORMING
LEAD COPPER, IRON, AND OTHER SUITABLE METAL TUBING INTO BENDS COILS
AND SPIRALS OF VARIOUS SHAPES AND DESIGNS OR PATTERNS
PROVISIONAL SPECIFICATION left by the said Thomas Drake at the Office
of the Commissioners of Patents on the 15th February 1883.
<< AN
THOMAS DRAKE of Huddersfield in the county of York Solicitor
APPARATUS FOR BENDING OR FORMING LEAD COPPER, IRON, AND OTHER SUITABLE
METAL TUBING INTO BENDS COILS AND SPIRALS OF VARIOUS SHAPES AND DESIGNS
OR PATTERNS
"
The object of my invention is to construct and arrange a Machine or apparatus
for the purpose of bending metal tubing into various Bend Spirals and Coils of
various shapes designs and patterns without disturbing and flattening the roundness
of the tube operated upon and without the necessity of previously loading the said
tube with Resin or other material.
The apparatus I emply consists of a roller mounted in suitable framework and
caused to revolve at any required speed by gearing. On the periphery of the roller
a spiral groove is formed and resting upon the said roller is a pulley having a
groove formed therein so as to be linable or parallel with the spiral groove in the
roller and of the same width of groove. This pulley is connected to and supported
by a lever and revolves on its own axis. One end of the lever is mounted on a
shaft which is fixed parallel to the roller first mentioned and at its extremities runs
in loose collars or slips. The shaft has an endless screw on it of the same pitch as
the roller and the end of the lever fixed thereon has a female screw enabling it to
work on the said shaft. The shaft and the roller first named are geared by wheels
in order to make their speed the same.
When the roller is in motion the lever on
'

page_text: the shaft slides endwise in the direction of the length of the roller, whilst the other
end is weighted for purposes hereinafter explained.
In order to form a bend or spiral one end of a pipe or tube is secured to the
grooved roller, half the diameter of the pipe or tube resting in the groove of the
roller the projecting half entering the grooved pulley which is pressed down
tightly thereon by heavy weights placed on the other end of the lever as previously
mentioned
By these means bends coils or spirals of the same or varying diameters can be
expeditiously made and of any convenient length. When bending strong metal
tubing it may be necessary to wind them upon the grooved roller whilst in a hot
state in which case they would rapidly cool and contract binding upon the roller so
as to render it difficult to remove. To provide for this I propose to make the
roller in four parts two of the parts are arranged to lower or recede from the surface
thereof towards the centre so that the other two parts may come nearer together
and thereby reduce the diameter of the roller and allow for the removal of the coil.
The two segments which lower rest upon the edge of a loose disc which is screwed
into each end of the roller and when a coil is to be removed from the roller the
discs are unscrewed and the loose segments resting thereon are allowed to lower
towards the centre.
In order to keep the four parts of the roller together the discs are provided with
a rim or cap which fits onto the end of the roller. The ends of the roller are
reduced in diameter so that the outer surface of the cap is slightly below the
bottom part of the groove. The discs work upon a screw formed or fixed on the
shaft carrying the roller and is so arranged that it can only travel a given distance
thereon, according to the distance the discs are allowed to enter into the end of the
roller and withdraw therefrom.
Instead of employing the travelling grooved pulley as mentioned above another
-grooved roller may be employed in contact with the one already referred to and of
the same size in all respects the two grooves therein being so arranged-as-to-run-
together.
.
Or the first herein mentioned machine may be varied by the pulley and lever
being fixed on a plain smooth shaft instead of one with an endless screw as above
described. In that case the weighted lever supporting or holding the pulley will
slip or travel upon its smooth shaft and follow the endwise traverse of the spiral
groove on the roller containing the coiled tube, the endwise thrust thereof being
obtained by the pressure of the pulley upon the upper half of the tube.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Drake in the Great Seal Patent Office on the 15th August
1883.
THOMAS DRAKE of Huddersfield in the County of York, Solicitor
"AN
APPARATUS FOR BENDING OR FORMING LEAD, COPPER, IRON AND OTHER SUITABLE
METAL TUBING INTO BENDS, COILS AND SPIRALS OF VARIOUS SHAPES AND DESIGNS
OR PATTERNS
دو
The object of my Invention is to construct and arrange a machine or apparatus
for the purpose of bending metal tubing into bends, spirals and coils of various
shapes, designs and patterns without disturbing or flattening the roundness of the
tube operated upon and without the necessity of previously loading the tube with
resin or other material.
And in order that the Invention may be better understood, I herein give
reference to the accompanying sheets of Drawings, wherein Fig 1 is front elevation,
Figs 2 and 3 are opposite end elevations of same, shewing one form of machine
I employ for carrying out my Invention.
A is a spirally grooved roller, mounted in brackets B, and supported by
framework C. The grooved roller is caused to rotate by a suitable arrangement of
gearing D, driven from the main driving shaft E which may have rotary motion
given to it by pulley or swaife F. A screwed shaft G caused to rotate at the
required speed and driven from the same source as the grooved roller is employed,
upon which is a box nut H having a hinged weighted lever I connected thereto,
the latter of which is provided with an antifriction pulley J having a groove
therein, linable or parallel with the groove in the roller. The pulley J rests upon
the roller A in such manner that the semicircular grooves made therein form one
complete circle of the same diameter as the pipe required to be bent.
THE MODUS OPERANDI
One end of a pipe intended to be bent or formed into coils or spirals is connected
to the roller A at the part a and when the said roller is set in motion the pipe is
wound into the grooves, the lower half of the said pipe entering the groove in the
roller, whilst the upper half enters the groove in the pulley J which is pressed
heavily on the pipe by the weight K. When the machine is in motion the screw G
causes the box nut H and parts connected therewith to move endwise, thereby
causing the pulley to travel laterally upon the roller and at the same surface speed.
By this means bends, coils, or spirals can be expeditiously made, and they can be
easily removed from the grooved roller by disconnecting the pipe at the part a and
holding it whilst the roller continues its rotary motion, by which method it is
pushed or run off the end of the said roller.
Instead of employing the travelling grooved pulley as mentioned above, another
grooved roller may be employed in contact with the one already referred to and of
the same size in all respects, the two grooves therein being so arranged as to run
together. Or the first herein mentioned machine may be varied by the pulley and
lever being fixed on a plain smooth shaft instead of one with an endless screw as
above described. In that case the weighted lever supporting or holding the pulley
will slip or travel upon its smooth shaft and follow the endwise traverse of the
spiral groove on the roller containing the coiled tube, the endwise thrust thereof
being obtained by the pressure of the pulley upon the upper half of the tube.
When bending strong metal tubing it may be necessary to wind them upon the
grooved roller whilst in a hot state, in which case they would rapidly cool and
contract, binding upon the roller so as to render it difficult to remove. For this

page_text: purpose I make the grooved roller in four parts, which will be readily understood
on reference to Fig 4 which is longitudinal section of the said roller, Fig 5 being
cross section of same. This roller is composed of the four parts a, b, c, d, the two
former being capable of receeding from the surface, towards the centre, as shewn in
dotted line in Fig 5 whereby the remaining parts c, d may be brought nearer
together so that the diameter of the roller may be reduced to allow for the removal
of the coil. The extreme ends of all the segments, rest upon the tapered shoulder e
of the plate L, and when the plates are screwed in an outward direction upon the
threads formed on the shaft M, as shewn in Fig 6, the segments a and b will lower
or recede towards the centre thereby allowing the parts c and d to be brought
nearer together as explained. In order to cause the two end plates L to move
outward on their shaft together, and at the same speed, right and left handed
threads are formed on the said shaft M, upon which is placed a plate or double
crank N having holes therein, through which the rods P are passed, by which
-means when either of the said plates L are revolving, rotary motion will be com-
municated to the other plate and the opposite endwise movements obtained. To
determine the distance that each plate will be allowed to travol, adjusted collars R.
are fastened upon the shaft M for the boss of the plate L to butt against.
In order to form bends, coils or spirals of varying diameter, the same general
construction of machine already described, is employed, but in this case the
grooved roller is made taper as shewn in Figs 7 and 8, the former being a front
elevation and the latter an end view thereof. By employing two grooved rollers
as shewn on the drawings a double coil may be formed at one operation, and
when severed in two at the smallest coil, two distinct coils of varying diameter
are produced. The two-grooved rollers are fixed upon the shaft M separately,
one of which is keyed on the said shaft, whilst the other is held in its place by
a screw, and admits of being easily removed so as to enable the full coil when
-formed to be removed from the rollers A.
Having now shewn and described my Invention and the manner of carrying the
same into practice I would have it understood that I do not confine myself to-the-
exact details herein shewn and described as the same may be varied without
departing from the nature of my Invention, but what I consider new and therefore
claim is―
Firstly. The use of the spirally grooved roller A in combination with the spirally
grooved anti-friction pulley J operated in the manner and for the purpose
substantially as herein shewn and described.
Secondly. The means or method herein shewn and described for traversing the
grooved pulley in an endwise direction.
Thirdly. The expanding or contracting roller for facilitating the removal of the
coils as described and shewn in Figs 4, 5, and 6.
Fourthly. The general arrangement and construction of machine substantially as
herein shewn and described for forming bends, coils or spirals.
In witness whereof I the said Thomas Drake, have hereunto set my hand and
seal this tenth day of August in the year of our Lord, One thousand, eight hundred
and eighty three.
MHA2
Witness,
ARTHUR H: GREGORY.
Solicitor's Clerk
Huddersfield.
THOS (L.B.) DIARE