Improvements in the Means or Method of Bending certain Angle Iron.
Year: 1899

page_text: Date of Application, 2nd Mar., 1899
Complete Specification Left, 2nd Dec., 1899-Accepted, 20th Jan.,
1900
DI DUIFICATION,
Improvements in the Means or Method of Bending certain Angle Iron.
We, JOSEPH MIDGLEY and WALKER SUTCLIFFE, of the Firm of Midgley and
Sutcliffe, West End Tool Works, Richmond Road, in the City of Bradford,
Machine Tool Makers, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in the means or method of bending
angle iron of "L" section into circles or curves, and its object is to prevent the
iron "curling" that is to say: prevent it deviating from a plane in which the
actual bending takes place at right angles to the axes of the bending rollers.
For this purpose we place two angle irons together so that they virtually form
a "T" section and we bend them together thus the tendency to curl in each iron
is quite counteracted by the other. The groove in the bending roller or rollers
is made wide enough to receive the two adjacent webs of the two "L" irons.
Two angle irons of "T" section can be bent together in a similar way without
curling.
Dated this 27th day of Eshruary 1800
COMPLETE SPECIFICATION.
Improvements in the Means or Method of Bending certain Angle Iron.
We, JOSEPH MIDGLEY and WALKER SUTCLIFFE, of the Firm of Midgley and
Sutcliffe, West End Tool Works; Richmond Road, in the City of Bradford,
Machine Tool Makers, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
This invention relates to improvements in the means or method of bending
angle iron of "L" section into circles or curves, and its object is to prevent the
iron "curling" that is to say: prevent it deviating from a plane in which the
actual bending takes place at right angles to the axis of the bending rollers.
To fully describe our invention, reference is made to the accompanying sheet
of drawings forming a part of this specification, in which similar figures of
reference indicate corresponding parts in each of the views.
Figure 1 represents a side elevation of such portions of a bending machine as
are necessary to illustrate our method of bending angle iron with the radial web
inwards.
Figure 2 is a front view of the same.
line a, b.
Figure 3 is a section on the broken

page_text: Figure 4, is a front view of the arrangement of rollers employed for bending
angle, iron with the radial web outwards.
Figure 5, is a sectional plan on the broken line y, z.
Figure 6 is a view of a piece of bent angle iron in which 3 represents the
radial web referred to in connection with Figure 1.
Figure 7 is a view of a piece of bent angle iron in which 3 represents the
radial web referred to in connection with Figure 4.
Referring firstly to the arrangement shown in Figures 4 and 5 for bending
angle iron with the radial web outwards the adjustable roller 6 for bearing on
the inside of the curve is of ordinary form but the grooves 7 in the two other
rollers 8, 8 are made wider than usual so as to take the web 3, 3, of the two
angle irons 9, 9 as shown in cross section in Figure 4. When the irons are
bent in pairs in this way the tendency to curve, is mutually counteracted. The
width of the grooves 7 may be made adjustable in the manner shown in Figure 5
or in any other convenient way in order that, the grooves will accommodate
'different thicknesses of web.
When bending angle iron with the radial web inwards we find that if bent
with the webs together as shown in Figure 4 the tendency is for the two irons to
curl away from each other and consequently curling is not prevented. To
obviate this we still bend the two, irons together, but place them as shown in
Figure 2 with the edges of the webs 4, 4 touching each other. In this. case the
irons tend to curl towards each other so that they mutually prevent curling. The
roller 6 is made with two grooves 7 to receive the web 3, 3 and the distance
between the grooves may be made adjustable either in, the manner shown in
Figure 3 or in any other convenient way.
"
When bending angle iron in this way the bending is preferably commenced
near the middle and clamps or clips are placed preferably on both ends to keep
the two irons parallel and prevent the inward pressure causing the one iron to
mount the other.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
The means or method of preventing angle iron curling whilst it is bent, con-
sisting in bending it in pairs, substantally as herein shown and described.
Dated this 30th day of November 1899.