Year: 1886

page_text: Date of Application, 14th May, 1886.
Complete Left, 12th Feb., 1887.
Complete Accepted, 15th Mar., 1887.
I, WILLIAM NOBLE, Junior, of 3 Walton Street, Shawlands, in the County of
Renfrew, Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in apparatus for bending iron or steel bars of
angle, tee or similar sections to the requisite curvature for use in the construction of
steam boilers or for like purposes, and whilst applicable in cases in which the web or
flange which is normal to the line of curvature is subjected to elongation in bending,
the improvements are more particularly designed to overcome the liability of buckling
or puckering of the web or flange in cases in which compression of the flange takes
place in the bending operation.
The improved apparatus comprises the usual pair of plain rolls which bear upon the
outer or flat side of the angle or tee bar in bending it and an inner roll such as is
usually provided to bear upon the inner flat side of the same flange of the bar, but
under the improvements said inner roll is so turned or formed upon one edge or side
as to bear against the one side of the flange or web which is normal to the arc of
curvature of the bar while an auxilliary roll fitted upon the same shaft as the inner
roll bears against the opposite side of said flange or web. These rolls thus grasp the
inwardly projecting web of the angle iron bar between them while the bar is subjected
to bending and they thus prevent buckling or puckering of the web. The auxilliary
roll is by preference fitted to turn independently of the bending roll which is on the
same shaft and the rolls are held hard up against each other by collars upon the shaft
or by other means so as to maintain the requisite lateral pressure upon the sides of the
web. For bending iee iron bars, instead of providing an auxilliary roll to bear only
upon the side of the web, two rolls are fitted to bear upon the inner flat face of the
flange and have cut or otherwise formed between them a groove to fit the mid rail or
web of the bar; or a single inner roll may be used having a suitable
formed
groove
in it. The shaft carrying the inner bending rolls is as usual fitted adjustably to
provide for operating on bars of different thicknesses or varying cross section.

page_text: Improvements in Apparatus for Bending Iron or Steel Bars of Angle,
Tee, and similar Sections.
I, WILLIAM NOBLE Junior of 3 Walton Street, Shawlands, in the County of
Renfrew 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
My invention relates to improvements in apparatus for bending iron or steel bars
of angle, tee or similar sections to the requisite curvature for use in the construction
of steam boilers or for like purposes, and whilst applicable in the usual cases wherein
the web or flange which is normal to the line of curvature, is subjected to elongation
in bending, the improvements are designed and have more particularly for their object
to overcome the liability of the web or flange to buckle or pucker in cases in which
compression of the flange takes place in the bending operation.
As represented under one modification in plan at figure 1, in end elevation at figure 2
and in side elevation at figure 3 of the annexed drawings the improved apparatus
comprises a framing A, in which spindles are carried in suitable bearings, a pair of
plain rolls B, B, being situated on these spindles. The rolls B, B, bear upon the outer
or flat side of the angle or tee bar T, in bending it and in conjunction with them a
roll C, bearing upon the inner flat side of the same flange of the bar is provided, the
said roll C being so turned or formed that it also bears against the upper side of the
other flange or web, which is normal to the are of curvature of the bar T, while an
auxiliary roll fitted upon the same stud as the roll C, bears against the opposite or
under side of said flange or web, and the rolls C, C, thus grasping the inwardly
projecting webt of the angle iron bar between them while the bar is subjected to
bending prevent buckling or puckering of the web.
The stud e carrying the inner rolls C, C', is fixed in a slide which is adjusted hori-
zontally in the framing A, by screws or other means and the rolls are held hard up
to each other by the split nut & upon the stud c or by other means to maintain the
requisite lateral pressure upon the sides of the web. The stud c is also adjustable
vertically to suit the various thicknesses of bars and the auxiliary roll C is by pre-
ference fitted to turn independently of the roll C. For bending tee iron bars, instead
of providing an auxiliary roll to bear only upon the side of the web, two rolls C, C,
are fitted as represented at figure 4, to bear upon the inner flat faces of the flanges T
these rolls having left between them a space to receive the mid rail or web t of the
bar; or a single inner roll may be used having a suitable groove formed in it.
In operating upon T irons the table y of the machine is made so as to be capable
of being raised and lowered to suit different breadths of the flanges or the rolls 0, 0,
may be raised in unison on the stud c for the same purpose.

page_text: Upon the spindles of the plain rollers B, B, spur wheels D, D, are fitted and driven
both in the same direction from a spur wheel E, on an intermediate shaft which may
be operated through suitable gearing such as worm gearing G, as seen at figure 3, or
bevel gearing as shewn at G figure 4, from a shaft having on it belt pulleys F.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is :-
1. The general arrangement and combination of parts constituting the improved
apparatus for bending bars of angle, tee and similar section, substantially as described
with reference to figures 1, 2, 3 and 4, of the annexed drawings.
2. In apparatus for hending bars of angle, tee and similar section the combination
with the roller or rollers B, of a roller or rollers arranged to grasp the inside web or
flange to prevent puckering, substantially as described, with reference to the drawings
annexed.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.