IMPROVEMENTS IN MACHINERY OR APPARATUS FOR STRAIGHTENING AND DEVDING " PROVISIONAL SPECIFICATION
Year: 1883

page_text: LETTERS PATENT to Charles Scriven of the Leeds Old Foundry, Leeds, in the
County of York, Engineer, and John Tweedy, of Walker-on-Tyne, in the
County of Northumberland, Engineer, for an Invention of IMPROVEMENTS
IN MACHINERY OR
APPARATUS FOR
STRAIGHTENING AND
DEVDING
"
PROVISIONAL SPECIFICATION left by the said Charles Scriven and John
Tweedy at the Office of the Commissioners of Patents on the 16th March
1883.
CHARLES SCRIVEN of the Leeds Old Foundry. Leeds in the County of York
Engineer, and JOHN TWEEDY of Walker-on-Tyne, in the County of Northumberland
Engineer, "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR STRAIGHTENING AND
BENDING METALLIC PLATES,"
Metallic plates produced by rolling, as is well understood usually leave the rolling
mill in a warped or uneven state, or in other words are what is technically called
buckled
Now one part of our invention relates to improvements in machinery or
apparatus such as is employed to remove such "warping or "buckling"-Two
series of rolls are suitably mounted in housings or framework in such a way
that the warped or buckled plates can be caused to pass to and fro through or
between them,
These rolls are arranged horizontally with their axes in two horizontal planes,
one above the other, the upper series being suitably driven from any motor, The
axes of the rolls of one series are in vertical planes that pass between the rolls of
the other series, or in other words the rolls of one series are opposite the spaces
between the axes of the rolls of the other series, The lower series of rolls is
adjustable in relation to the upper series by gearing so arranged that they
may be caused to approach or recede from the upper series simultaneously, also
provision is made whereby the outer rolls of the lower series may be caused
to take an advanced or rear position in relation to the other rolls in the same
series,
As the rolls of this series rest upon the parts for raising and lowering them, no
such backlash can occur in their movement as takes place in machines wherein the

page_text: upper series of rolls is moveable, consequently the adjustment of the rolls can be
effected with great precision. To facilitate this counterbalance weights can be
applied.
The housings or frames of the machine are so constructed that all the rolls
may be readily removed therefrom without taking down the framework.
A buckled plate in passing through or between the two series of rolls above-
mentioned, assumes a serpentine form, being subjected to a bending backward and
forward, the pressure acting in directions at right angles to that in which it is
travelling. The outer rolls in the lower series are so arranged to operate in relation
to the other rolls in the same series as to act upon and deliver the plate under
treatment in a straightened form.
Our Invention furthermore relates to the arrangement of such machinery or
apparatus so that it may also be used for bending metallic plates into either a
tubular or curvilinear form. For this purpose only one roll is used in lieu of the
entire upper series abovementioned, the other rolls of this series being temporarily
removed. Around this one roll which is rotated the plate becomes bent by the
joint action of this roll and that of two rolls in the lower series, these two rolls
having an upward movement whilst the remaining rolls of the series remain idle.
The bending operation is similar to that of an ordinary plate bending machine.
The one roll used in lieu of the upper series has three bearings and in order that
the plate when it assumes the form of a tube'or nearly so, may be removed from
that roll, the outer end bearing is capable of being removed (as is usual in most
plate bending machines) to permit of such removal in an endwise direction.
This machinery or apparatus may also be arranged with the rolls either in a
vertical or angular position, in which cases the counterbalance weights above
referred to will not be required.

page_text: "
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Scriven and John Tweedy in the Great Seal Patent Office on
the 14th September 1883.
CHARLES SCRIVEN of the Leeds Old Foundry, Leeds in the County of York,
Engineer, and JOHN TWEEDY of Walker-on-Tyne in the County of Northumberland
Engineer IMPROVEMENTS IN MACHINERY OR APPARATUS FOR STRAIGHTENING AND
$5
BENDING METALLIC PLATES
"
Metallic plates produced by rolling, as is well understood usually leave the
rolling mill in a warped or uneven state, or in other words, are what is technically
called "buckled." Now one part of our invention relates to improvements in
machinery or apparatus such as is employed to remove such "warping" or
buckling"
وو
Two series of rolls are suitably mounted in housings or framework in such a
way that the "warped or "buckled plate can be caused to pass to and fro
through or between them. These rolls are arranged horizontally with their axes
in two horizontal planes, one above the other, the upper series being suitably
driven from any motor, The axes of the rolls of one scries are in vertical planes
that pass between the rolls of the other series, or in other words, the rolls of one
series are opposite the spaces between the axes of the rolls of the other series. The
lower series of rolls is adjustable in relation to the upper series by gearing so
arranged that they may be caused to approach or recede from the upper series
simultaneously and parallel therewith, also provision is made whereby the outer
rolls of the lower series may be caused to take an advanced or rear position in
relation to the other rolls in the same series.
As the rolls of this series rest upon the parts for raising and lowering them, no
such back-lash can occur in their movement as takes place in machines wherein
the upper series of rolls is movable, consequently the adjustment of the rolls can
be effected with great precision. To facilitate this counterbalance weights can
be applied, The housings or frames of the machine are so constructed that all the
rolls may be readily removed therefrom without taking down the framework.
A buckled plate in passing through or between the two series of rolls above-
mentioned assumes a serpentine form, being subjected to a bending backward and
forward, the pressure acting in directions at right angles to that in which it is
travelling. The outer rolls in the lower series are so arranged to operate in relation,
to the other rolls in the same series as to act upon and deliver the plate under
treatment in a straightened form.-Our Invention furthermore relates to the
arrangement of such machinery or apparatus so that it may also be used for
bending metallic plates into either a tubular or curvilinear form. For this purpose
only one roll is used in lieu of the entire upper series abovementioned, the other
rolls of this series being temporarily removed. Around this one roll which is
rotated, the plate becomes bent by the joint action of this roll and that of two
rolls in the lower series, these two rolls having an upward movement whilst the
remaining rolls of the same series remain idle. The bending operation is similar to
that of an ordinary plate bending machine. The one roll used in lieu of the upper
series has three bearings, and in order that the plate when it assumes the form of
a tube or nearly so, may be removed from that roll, the outer end bearing is capable
of being removed (as is usual in most plate bending machines) to permit of such
removal in an endwise direction.
This machinery or apparatus may also be arranged with the rolls either in a
vertical or angular position, in which cases the counterbalance weights above
referred to will not be required.
- In the accompanying drawings the same reference letters denote like parts
wherever they occur, Fig. 1. shews in elevation that end of a machine, according
to our invention, furthest from the driving gear. Fig. 2. is a front elevation,
Fig. 3, a plan, and Fig, 4, a cross-sectional elevation in the line a a, looking

page_text: towards the driving gear. b, b1, are the housings or framework for carrying the
upper and lower series of rolls, c, c1, and c 2 being the rolls of the upper series
which are the driven rolls, and,d, d 1, d2, d 3, those of the lower series, which are
caused to rotate by frictional contact with the metallic plate under treatment as it
passes to and fro between the said upper and lower rolls as shewn in sectional
elevation Fig. 4, five pinions e, connect the rolls of the upper series, two of these
pinions being intermediates. f, is the main driving spur wheel, on the axis of the
central roll c, of the upper series and receives motion from the pinion g, on the second
motion shaft h, on which is the spur wheel i, which receives its motion from the
pinion j, on the first motion or pulley shaft k, this pinion j, is in immediate
connection with the driving pulley k, 1, The pulleys k 2, k 3, 4, 5, are loose or
carrying pulleys for open and cross straps for imparting a forward and reverse
motion to the rolls to enable a metallic plate under treatment to be passed to and
fro between the lower and upper series of rolls until all "warping" or "buckling"
of such plate is removed, L, represents a plate under treatment. In order to grip
and bend a plate, between the rolls, the rolls of the lower series are caused to
move upward simultaneously by means of the hand wheel m, bevil gears n, worm o,
and tangent wheel p, in connection with the wheel q, on screw r, the said wheel q,
drives corresponding wheels q 1, 92, 93, on screws r 1, r 2, r3, these screws are so
connected with the wheels q, q1, q 2, q 3, that whilst the latter are being turned, the
screws are caused to move endwise by means of nuts 8, 81, 82, 83, in the housing b,
Similar gearing, screws, and nuts being also provided in the housing b1, both ends
of the rolls d, d1, d2, d 3, are caused to move up and down simultaneously as above
referred to. It is important for the efficient working of the machine that the
upward movement of these rolls as regards their pressure upon a plate under
treatment, should be determined in a positive manner and that no backlash in
that movement should occur. This is accomplished by making the lower series of
rolls movable, the weight of the rolls resting upon those parts employed for moving
them. In machines as heretofore usually constructed the upper rolls have been the
movable ones, having been suspended by the parts employed to move them, and
consequently not only have they been liable to "lash" or "drop" but, or moreover
nothing less than their entire dead weight could be applied as pressure to straighten
a plate.
Now our improved arrangement, according to which the rolls are lifted to give
the necessary pressure for effecting the straightening of a plate, is highly
advantageous, especially when very light plates are under treatment, as the
pressure is capable of being regulated from zero to any amount within the
capabilities of the machine, thus rendering it unnecessary to apply the entire dead
weight of the rolls which may be considerably more than requisite in the treat-
ment of such light plates,-In addition to the simultaneous movement of the
lower series of rolls, there is a provision for placing the outer ones d, and d³ of the
series, in an advanced or rear position in relation to the other rolls of the same series,
Whilst these last mentioned rolls have the nuts 8 1, s 2, of their moving screws (in both
housings respectively) fixed in the housings, the nuts 8,8 3, of the outer rolls d, d 3,
(also in both housings) are free to rotate therein independently of their moving
screws 1.3, The last named nuts are provided with tangent wheels t. t. and are
actuated in either direction, each pair simultaneously as required, by the hand
wheels u, u.
This arrangement enables us (when we find that all "warping" or
buckling" has been taken out of a plate under treatment and that it needs no
further bending by said outer rolls) to deliver the straightened plate at either side
of the machine.-Each of the shafts u, w, on which are the hand wheels u. u. above
referred to, carries a pair of worms v 1, 2, and w 1,-w 2. one each of which
is shewn in Fig. 4. these take into and rotate the tangent wheels t, t, together with
the nuts 8, 83, and cause the rolls d, or d 3, to take the advanced or rear position
above referred to.-When it is required to bend a metallic plate into a segmental
or tubular form, we remove from the upper series of rolls, the outside ones c 1,
and c 2; the central roll c, being the one around which the metallic plate is to be
"

page_text: bent, the bending is accomplished by upward movement of the lower series of rolls,
the action of two of which d 1, and d 2, on the underside of the plate is such as to
bend it around the roll c, of the upper series, and when the plate requires to be so
bent that its extreme ends or edges shall approach each other within a less distance
than the diameter of the roll c, its removal therefrom is effected in an endwise
direction. In order to accomplish this, the part 6 2, of housing 6 1, is swung on
the centre of motion at 6 3, as shewn in Fig. 3, out of the way, thus leaving the
end of the roll c, free for said removal..
In order to avoid the removal of the rolls c 1, and c 2 of the upper series when
it is desired to bend a plate, we in some cases find it convenient in lieu of using
the roll c, around which to bend such plate, to mount in suitable supplementary
housings w 3. one of which is shewn in cross-sectional elevation Fig. 5, an
additional roll x, over the above described upper series, with its axis opposite
the space between the axes of two rolls of said upper series, in suchwise that it is
movable thereto or therefrom. Around such additional roll x, we bend the plate
as in an ordinary plate bending machine, by causing the said roll x, to move
towards two of the rolls c and c 1, or c, and c 2, as the case may be. The axle of
the additional roll x, is elongated at one end, upon which previous to removing the
bent plate, pressure is applied sufficient to balance the overhanging roll, when the
bearing at the other end is removed for taking off the bent plate,-y, and z,
represent the belt shipping apparatus.
Having now described the nature of the said Invention and the manner of
carrying the same into practical effect, we would have it understood that what we
consider to be novel and original and therefore claim as secured to us under the
Letters Patent, first herein before in part recited is
1, In a machine for straightening and bending metallic plates the use of two
series of rolls so arranged that while the rolls constituting the upper series,
are retained with their axes in a common horizontal plane, the rolls of the
lower series are movable together in a vertical sense, and can be caused
to approach or recede from the upper series simultaneously, substantially
as hereinbefore described and illustrated in the drawings for the purpose
set forth.
2. In a machine for straightening and bending metallic plates, the method
substantially as described and illustrated, of mounting two series of rolls such
as referred to in claim 1, so that any of the said rolls may be removed
without taking down the housings or framework.
A machine of the kind referred to in claim 1, so constructed that it can be
used for bending metallic plates into the form of a tube or part of a tube
substantially as described
The improved machine for straightening and bending metallic plates, constructed
arranged and operating as shewn in and described with reference to Figs, 1, to 4,
inclusive of the drawings.
In Witness whereof, I, the said Charles Scriven for myself, and on behalf
f the said John Tweedy, have hereunto set my hand and seal this tenth day
f September in the year of our Lord One thousand eight hundred and eighty
hree.
Vitness
THOS E CRAVEN. C.E. Fell. Inst. Patent Agents
24 Victoria Chambers.
-
South Parade
Leeds.
CHAS. SCRIVEN (L.S.)