ACHINERY OR APPARATUS FOR THE TURES
Year: 1881

page_text: LETTERS PATENT to Samson Fox, of the
in the County of York, Engineer, for an
MACHINERY OR APPARATUS FOR THE
TURES"
Leeds Forge, New Wortley, Leeds,
Invention of IMPROVEMENTS IN
MANUFACTURE
"
OF CORRUGATED
PROVISIONAL SPECIFICATION left by the said Samson Fox at the Office
of the Commissioners of Patents on the 15th November 1881.
SAMSON Fox, of the Leeds Forge, New Wortley, Leeds, in the County of
York, Engineer. "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR THE
MANUFACTURE OF CORRUGATED TUBES."
My Invention has reference to improvements in machinery or apparatus for the
manufacture of corrugated tubes, to be used for internal fire boxes and flues and
the outer shells of steam boilers.
The plates from which I make such tubes are first corrugated in accordance
with the Specification of a former Patent granted to me the 30th day of June,
1877, No. 2530; or the plates may be corrugated throughout their entire length,
and previous to their being bent into the tubular form may be either straight in
the longitudinal direction of the corrugations, or may be partially curved in the
said direction during the process of corrugating.
My improved machinery or apparatus comprises a pair of suitably mounted and
driven rolls, having corrugations around their peripheries at right angles to their
axes, and a third roll so mounted in moveable bearings as to be changeable in
position in relation to the two first named rolls; the means employed for moving
said third roll may be either screw, lever, or hydraulic pressure, or a combination
thereof. This third roll may be plain or have corrugations, as desired; but I
prefer that it have corrugations corresponding with those of the first named rolls.
The corrugations of the first named rolls are so relatively arranged that the pro-
jections of one roll take into the grooves of the other, and the projections of the
third roll are opposite to the projections of one of the first named rolls in order
that such projections may be in a line with and take into the same grooves of the
plate as those of one of the first named rolls, the projections of which are opposite

page_text: and coincide with these on the third roll. And in order to ensure the correct
entrance of a corrugated plate into the "bight" of the pair of rolls which I will
call the gripping rolls, I provide suitable guides in front thereof, and that the plate
may continue to advance without slipping on its coming into contact with the
third or bending roll, I provide on the axis of one of the gripping rolls or on a
separate axis, as may be convenient, a pair of chain wheels or spur wheels, carrying
drag chains or racks provided with hooks or their equivalent, which take hold of
the rear edge of the plate; the said chains or racks travel at the same speed as
the average
surface speed of the gripping rolls and assist and cause the plate to
enter the said gripping rolls, and to travel along and withstand the bending action
of the third or bending roll. The corrugated plate on assuming the tubular form
surrounds one of the said gripping rolls, and in order to facilitate the removal of
the tube from the said roll I make the end bearing of such roll capable of being
turned thereoff or of being drawn away from it in halves by suitably arranged
mechanism, and I cause the other gripping roll to be moved away from the
"bight" of the two rolls a distance equal to about twice the depth of the
corrugations of the plate when the newly formed tube may be easily taken off,
after which I either rivet or weld its edges together.
A modification in the manner of taking the newly formed tube from the machine
is by causing the roll around which it is wrapped to be removed endwise the length
of the tube, when the latter may be rolled away.
-
"
A modification in the arrangement of the bending rolls consists in placing two.
suitably mounted and driven rolls in the same horizontal plane soine distance
apart, and providing a third roll over the opening of these two rolls; this third
roll around which the plate will become wrapped in the process of bending is
capable of being moved to and fro in the direction of the said opening or "bight'
of the first named_rolls, so_as_to_cause the corrugated-plate-to be-bent-in-its s-pa-sage
between the three rolls, and on completion of the bending operation of the plate
into the tubular form the tube and this third roll may be lifted from its bearings,
or the end bearing of the roll may be caused to open or be turned off, or the roll
may be drawn end wise, as before described, and the tube removed, after which
the end bearing may be closed or replaced, or the roll returned to its former position
ready for the next operation.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Samson Fox in the Great Seal Patent Office on the 15th May
1882.
SAMSON Fox, of the Leeds Forge, New Wortley, Leeds, in the County of
York, Engineer. "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR THE
MANUFACTURE OF CORRUGATED TURES."
My Invention has reference to improvements in machinery or apparatus for the
manufacture of corrugated tubes to be used for internal fire boxes and flues and
the outer shells of steam boilers. The plates from which I make such tubes are
first corrugated in accordance with the Specification of a former Patent granted to
me the 30th day of June 1877, No. 2530; or the plates may be corrugated
throughout their entire length, and previous to their being bent into the tubular
form may be either straight in the longitudinal direction of the corrugations or
may be partially curved in the said direction during the process of corrugating.
My improved machinery or apparatus comprises a pair of suitably mounted and
driven rolls, having corrugations around their peripheries at right angles to their
axes, and a third roll so mounted in moveable bearings as to be changeable in
position in relation to the two first named rolls; the means employed for moving.
said third roll may be either screw, lever, or hydraulic pressure, or a combination
thereof.
The third roll may be plain or have corrugations, as desired; but I prefer that it
have corrugations corresponding with those of the first named rolls.
The corrugations of the first named rolls are so relatively arranged that the
projections of one roll take into the grooves of the other, and the projections of
the third roll are opposite to the projections of one of the first named rolls, in
order that such projections may be in a line with and take into the same grooves
of the plate as those of one of the first named rolls, the projections of which are
opposite and coincide with those on the third roll.
And in order to ensure the correct entrance of a corrugated plate into the
"bight" of the pair of rolls, which I will call the gripping rolls, I provide suitable
guides in front thereof, and that the plate may continue to advance without
slipping on its coming into contact with the third or bending roll, I provide on
the axis of one of the gripping rolls, or by preference on a separate axis, a pair of
chain wheels or spur wheels carrying drag-chains or racks provided with hooks or
their equivalent which take hold of the rear edge of the plate; the said chains or
racks travel at the same speed as the average surface speed of the gripping rolls
or thereabout, and assist and cause the plate to enter said gripping rolls, and to
travel along and withstand the bending action of the third or bending roll. The
corrugated plate on assuming the tubular form surrounds one of the sand gripping
rolls, and in order to facilitate the removal of the tube from the said roll I make
the end bearing of such roll capable of being turned thereof or being drawn away
from it in halves by suitably arranged mechanism, and I cause the other gripping
roll to be moved away from the "bight" of the two rolls a distance equal to about
twice the depth of the corrugations of the plate, when the newly formed tubo
may be easily taken off, after which I either rivet or weld its edges together.
A modification in the manner of taking the newly formed tube from the
machine is by causing the roll around which it is wrapped to be removed endwise
the length of the tube, when the latter may be rolled away.

page_text: "
A modification in the arrangement of the bending consists in placing two
suitably mounted and driven rolls in the same horizontal plane some distance
, apart, and providing a third roll over the opening of these two rolls; this third
roll around which the plate will become wrapped in the process of bending is
capable of being moved to and fro in the direction of the said opening or "bight
of the first named rolls, so as to cause the corrugated plate to be bent in its
passage hetween the three rolls, and on completion of the bending operation of the
plate into the tubular form the tube and this third roll may be lifted from its
bearings, or the end bearing of the roll may be caused to open or be turned off, or
the roll may be drawn endwise, as before described, but of the abovenamed methods
I prefer to turn the end bearing off the roll, when the tube may be removed, the
bearing returned to its former position ready for the next operation.
In the accompanying three Sheets of the Drawings the same letters refer to the
same or like parts wherever they occur. Fig. 1, Sheet 1, is a plan; Fig. 2, a front
elevation Fig. 3, an end elevation; and Fig. 4, a back view of a part of a machine
for the manufacture of corrugated tubes according to this Invention.
Before proceeding with the description of this machine, as illustrated, I would
remark that the main grooved rolls, which are the gripping rolls, their driving
gear, and the housings in which they are mounted, and the manner in which one
roll is caused to approach the other roll, correspond so nearly with similar parts in
the rolling machine described in my former Specification above referred to, and
being marked with similar letters do not require detailed description here. In
front of the two grooved or gripping rolls A and A 1 I provide a framework a
and a 1 for carrying four chain wheels b, b1, c, c1; two of these, b and b1, are
mounted on the shaft d, which is driven from one of the roll pinion shafts G 2 by
_ a train of gearing e, f. g. This shaft may be in two parts and provided with
a disengaging clutch (not shewn in the above Figures) in order to regulate the
entrance of a corrugated plate into the "bight" of the gripping rolls A and A 1.
The remaining two chain wheels c and clare mounted on adjustable studs c"
and c, at some distance from the two before mentioned wheels. Around each
pair of chain wheels there is placed an endless chain or i, capable of being
stretched by the aforesaid adjustable studs, and between each pair of chain wheels
I support the upper line of chain by a projecting part of said framework j or j 1.
On one or more links of each chain I provide a projection, suitable for pressing
against the rear edge of a corrugated plate, and to assist in passing the plate
through the "bight" of the gripping rolls for the purpose of forming it into a
tube. On a suitable and adjustable carriage behind the gripping rolls A and A 1
I mount in bearings a third corrugated or grooved roll m, which I will call the
bending roll, and which is caused to bear against the underside of the corrugated
plate as it passes between the gripping rolls A and A 1, and in order to give it the
necessary curvature for forming the required tube.
This carriage is shewn capable of being moved vertically past the "hight" of
the gripping rolls (or if desired this movement may be at any other suitable angle)
by the hand wheel n, gearing o, p, endless screw q, and the train of helical gearing
r, s, t, u, the latter two members of the train having internal screw threads for the
screws and w, which are fixed to the beforenamed moveable carriage l. By this
means the bending roll m may be raised or lowered at pleasure. Instead of this
result being attained by hand, power may be applied for this movement either by
a system of levers or hydraulic pressure, or by a combination thereof, as previously
specified.
When a tube has thus been formed it surrounds the top gripping roll A, and
may be removed therefrom by succe-sively lowering the gripping roll A 1 and the
bending roll m, and opening the end bearing D, as described in my former Speci-
fication above referred to. When the tube has been removed and the said end
bearing closed, the machine is again ready for proceeding with the formation of
another tube. A modified machine according to my Invention is shewn in Sheet 2.

page_text: Fig. 5 is a plan, Fig. 6 a front elevation, and Fig. 7 an end elevation in part. The .
remarks made with reference to Sheet 1, in connexion with the main grooved .or
gripping rolls, their driving gear, and the housings in which they are mounted,
apply to these parts on this Sheet 2, with this difference, that the end bearing D.
of the top roll A is not required to open. The top roll A after the tube has been
formed, and while it is still surrounded by it, is drawn end wise out of such tube
by the connecting rod x and crank y, the centres or throw of the latter being
equal to half the distance the roll is required to bo moved, and on the axis of
which is mounted the worm wheel actuated by the worm or endless screw all
and driving pulleys b and c (fast and loose) for starting and stopping. The
aforesaid connecting rod or link is provided with a swivelling movement at its
junction with the roll shaft at d, which allows the said roll shaft to rotate freely
without affecting its connection with the crank. During the withdrawal of the
said roll A from the newly formed tube the middle bearing C³ of the roll shaft
leaves the housing C 1, and is supported by the two guide bars e" and ". The
main driving wheel G and the first roll pinion G 1 are connected together so as to
allow the roll shaft to pass through during its endwise motion, a driving feather
being provided in the wheel or pinion connection, and which takes into the
groove g of the roll shaft. This modification is provided with similar frame-
work a, a 1, chain wheels b, b1, and c, c', and endless chains h and i, not shewn in
this Sheet, and also with bending roll m, carriage l, and similar movements for the
same to those de-cribed with reference to Figs. 1, 2, and 3 of Sheet 1. In Figs. 5
and 6 the chain wheel shaft d is in two parts, and provided with a clutch i¹¹ (not
shewn in Figs. 1 and 2, Sheet 1), for regulating the entrance of a corrugated plate
into the "bight" of the gripping rolls A and A'.
Another modification is shewn in Sheet 3, wherein Fig. 8 is a plan, Fig. 9 a
front elevation, Fig. 10 an end elevation, shewing the housing C in parts, the
upper of which is capable of being swivelled on the pin or bolt A 5; Fig. 11 shews
a portion of the housing B between the main driving wheel G and the roll pinion
G1 and G 2.
"
ور
The two bottom rolls A and A 1 are in the same horizontal plane, with an open
bight "between them. The third roll A2 is placed over the said open "bight'
of the two first named rolls A and A 1. The pinious G1 and G2 for giving
motion to the bottom rulls A and Al are driven in the same direction by the
pinions H and H 1 on the shaft of the main driving wheel G. G 3 and G 4 are
breaking sprindiles, and G 5, G 6, G 7, and G 8 are the coupling boxes for connecting
the pinions G 1 and G2 to the said rolls A and A 1. A 2 is the top or bending
roll, which I shew to be driven by the train of gearing H2, H3, H4, and H 5.
C1 is the middle housing, and C2 the before named end housing in parts; C 4 is a
rest, upon which a corrugated plate is placed previously to being passed into the
rolls, and when its leading end has reached about the centre of the roll A 1 the top
or third roll A 2 is by the hand wheels a 5 and a 6, worms a 7 and a 8, worm
wheels b 5 and 6 6, and the screws 7 and 8 caused to press upon the said plate,
bend it, and give it an amount of curvature necessary for forming a tube, as shewn
completely bent in the dotted lines b9 in Fig. 10.
In order to remove this newly formed tube from the top roll A 2, around which
it is wrapped, instead of lifting the top roll A 2, together with the said tube, or
drawing out the roll end wise, or opening the end bearing thereof, I, in the present
arrangement, turn a swivel off the end bearing D by causing the upper portion of
the housing C 2 to turn on the pin or bolt A 5, the other side in the mean time
being supported by and sliding upon the segmental bed c 6, a pinion c7, and
circular rack c 8 being provided for the purpose. Before proceeding to swivel the
said upper portion of the housing C2 I first raise the top roll A 2 sufficiently to
effect a clearance of the corrugations of the tube from those of the rolls.
shaft A 4 of the top roll A 2 is long enough to pass into the housing B, and has a
bush A 3 on the end thereof, not necessarily to form a bearing, but so that when
The

page_text: the roll A 2 has been raised as abovementioned the screw C9 is caused to bear
upon the said bush A 3. I next cause to be removed from the end journal of said
top roll a circular sleeve or bush d 5 to give sufficient lateral clearance between
the end journal and its bearing to permit of the swivelling of the said upper part
of the housing C2 on the beforementioned pin or bolt A 5 to about right angles
from its working position, and as shewn in dotted lines C3 in Fig. 8. The
roll A 2 is now overhanging the middle bearing in housing C1, which under the
abovenamed circumstances becomes a fulcrum, the part A 4 of the roll shaft, a
lever, and the screw c 9 aeting on the bush A 3, gives the pressure necessary to
counterbalance the now overhanging roll. The tube may now be removed end-
wise, after which the housing 02 be swivelled back to its former position ready
for another operation.
Having described the nature of the said Invention and the manner of carrying
the same into practical effect, I would have it understood that what I consider to
be novel and original, and therefore claim as secured to me by the Letters Patent
herein before first in part recited is,-
1. The use, for the purpose of bending corrugated metallic plates to the form of
tubes, of a machine comprising a combination of three corrugated or grooved rolls,
whereof two are main rolls, such as described in Specification No. 2530, A.D. 1877,
herein before referred to, and are arranged to act as gripping rolls, and the third
roll is one with similar corrugations to those of the main or gripping rolls, and
mounted in bearings on a moveable carriage behind the main or gripping rolls in
such a manner that when in operation it so acts upon a corrugated plate under
treatment as to form the same into a tube, substantially as hereinbefore described
and shewn in Figs. 1, 2, 3, and 4 of the Drawings.
2. In a machine for bending corrugated metallic plates into the form of tubes,
-the-use, in combination with an arrangement of three corrugated rolls such as
referred to in claim 1, of guides for facilitating the correct entrance of a corrugated
plate into the "bight" of the gripping rolls, substantially as described and
illustrated.
3. In a machine for bending corrugated metallic plates into the form of tubes,
the use in combination of an arrangement of three rolls, driven chain wheels,
adjustable chain wheels, and endless pitch chains, or their equivalent, furnished
with projecting parts for acting on the rear end or edge of a corrugated plate, and
pressing it forward into the bight of the main or gripping rolls, the whole arranged
and operating substantially as hereinbefore described and shewn in Figs. 1, 2, and 3
on Sheet 1 of the Drawings.
4. In a machine for bending corrugated metallic plates into the form of tubes,
the method of releasing a tube that has been formed around one of the said rolls
by removing that roll from within such tube by means of a crank connected to
the said roll, and actuated substantially as hereinbefore described and illustrated
in Figs. 5 and 6 on Sheet 2 of the Drawings.
5. The improved machine for the manufacture of corrugated tubes, substantially
as described with reference to and shewn in Figs. 5 to 7 inclusive of the
Drawings.
"
6. In a machine for bending corrugated metallic plates into the form of tubes,
the use in combination with two corrugated or grooved rolls in a common hori-
zontal plane, and a third corrugated or grooved roll situate over the open "bight
of the said two rolls, of an arrangement substantially such as described with
reference to Figs. 8, 9, 10, and 11 of the Diawings, according to which, for the
purpose of removing a tube from the top roll, the upper portion of the housing
containing the bearing of the end journal of that roll is swivelled horizontally on
a pin or bolt A5 by a pinion and circular rack, the said upper part of the housing
during such movement being supported on a segmental bed, and the overhanging
roll, balanced by the pressure of a screw, upon and near the end of the prolonged
axle of the roll, all substantially as described and shewn.

page_text: 7. The improved machine for the manufacture of corrugated tubes, shewn and
described with reference to Figs. S to 11 inclusive of the Drawings.
In witness whereof, I, the said Samson Fox, have hereunto set my hand
and seal, this Tenth day of May, in the year of our Lord One thousand eight
hundred and eighty two.
Witness to the signature of the
said Samson Fox,
Tuos. E. CRAVEN, C.E.,
Patent Agent,
24, Victoria Chambers,
South Parade,
Leeds.
SAMSON FOX. (L.S.)