Improvements in Machinery for Bending Channel Section Bars.
Year: 1890

page_text: Date of Application, 5th Nov., 1890
Complete Specification Left, 4th Aug., 1891-Accepted, 19th Sept., 1891
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Bending Channel Section Bars.
We, JOSEPH BENFIELD, of Bridgeman Street, Walsall, Shocing Smith, EDWIN
ERNEST SHELDON and ALFRED MILLS, trading together as Sheldon & Mills,
of Walsall, aforesaid, Curriers, do hereby declare the nature of this invention to
be as follows:-
This invention has reference to machinery for bending channel section bars of
iron, steel, or other ductile metal or alloy for various purposes but more particularly
for making those horse and other like shoes which have a channel on the under or
wearing side thereof.
When bending channel section bars it has heretofore been found difficult to keep
the channel open which difficulty this invention entirely overcomes.
A machine constructed according to this invention for bending channel section
bars for horse and other like shoes has a block or mandril around which the said
bar is bent this block or mandril corresponding in shape and size with the inside of
the required shoe. This block or mandril has a base or flange all round on or
against which the channel section bar rests. Adjacent to the said block or mandril
is a bending tool formed so as to fit or take inside and outside the channel section
bar. Those parts of the tool which bear against the inside and outside of the said
channel bar may take the form of rollers. The said bending tool is suitably
supported and arranged to move or to be moved around or partly around the block
or mandril so as to bend the channel section bar to conform with the same, and the
sides of the channel are, during the bending process, effectually supported and
prevented from closing together by part of the bending tool engaging in the
groove.
The said bending tool is or may be carried by a lever or arm which turns around
the block or mandril as a centre and the bending tool is or may be constrained to
travel in the proper curve by a grooved cam plate fixed around the block or
mandril in which a roller or projecting part of the bending tool fits, the lever or
arm being slotted to allow of the bending tool accommodating itself to the curve of
the mandril.
Two bending tools may be similarly employed with the block or mandril and
arranged to move partly around the mandril in opposite directions so as to bend the
bar from its centre to or towards its ends.
When using a single bending tool as above described we find it necessary to hold
the bar in position by making a hole in one end of the bar which fits on to a pin in
the base or flange of the mandril.
This invention can be similarly applied to bending channel section bars for other
purposes, the mandril and cam plate being made of the shape to which the bar is
required to be bent.
Dated this 20th dox of October 1890
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery for Bending Channel Section Bars.
We, JOSEPH BENFIELD, of Bridgeman Street, Walsall, Shoeing Smith, EDWIN
ERNEST SHELDON and ALFRED MILLS, trading together as Sheldon & Mills,
of Walsall, aforesaid, Curriers, 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 has reference to machinery for bending chaunel section bars of
iron, steel, or other ductile metal or alloy for various purposes but more particularly
for making those horse and other like shoes which have a channel on the under or
wearing side thereof.
When bending channel section bars it has heretofore been found difficult to keep
the channel open which difficulty this invention entirely overcomes.
We will describe this invention by referring to the accompanying drawings on
which
Fig. 1 is a side view of a machine constructed according to this invention for
bending channel section bars for making the said horse shoes ;
Fig. 2 is a sectional elevation, and Fig. 3 is a plan on an enlarged scale of the
block or mandril and the bending tool and certain other parts of the said machine
represented in the act of bending one of the said bars;
Fig. 4 is a sectional elevation of the said parts.on line X X of Fig. 1, and
Fig. 5 is a sectional plan of the same;
Figs. 6 and 7 shew the bending tools separately and
Fig. 8 shews the block or mandril separately in side elevation and in plan..
The same letters and numerals indicate the same or corresponding parts
throughout the drawings.
The said machine is furnished with a block or mandril A' around which the
channel section bar B is bent as hereinafter described, this block or mandril
corresponding in shape and size with the inside of the required shoe, and having a
base or flange A2 all round on or against which the channel section bar Brests.
The block or mandril A' and its flange A2 are fixed to a cam plate C by the central
pin d and the screw e, and this cam plate is fixed to the base of the machine
frame F. Free to turn around the central pin d is an arm G carrying the bending
tool H. which has a shank free to move along a slot in the arm G. This
bending tool is shewn separately in front and side elevation and in inverted, plan
by Fig. 6. It will be seen to consist of a somewhat wedge shaped or taper part-
which takes in the inside of the channel section bar, and an outer elongated. part h³
which bears against the outside of the said channel bar so that the outer flange b* of
the bar is between the parts ³. This outer part 3 of the tool engages in a
groove in the cam plate C, this groove corresponding with the shape of the block
or mandril a' as shewn but being somewhat larger. The arm G also carries ortmay
carry in the slot g' another bending tool I arranged to act upon the channel section
bar somewhat in advance of the tool H, as the bar will then bend more easily, but
this second bending tool I is not essential and may be dispensed with.. The bending
tool I, shewn separately by Fig. 7, has a roller or other part which bears
against the outside of the bar and a lower enlargement which takes in another
groove (similar to the groove c¹) in the cam plate C.
The arm G and 'the bending tools carried thereby are caused to turn around
the central pin d by any convenient means as by the mechanism shewn in Fig. 1
which consists of the continuously revolving spindle j (receiving motion from the
pulley through the bevel wheels and m) carrying at its lower end the clutch n,
which s free to be moved up and down the spindle ; by the forked lever o con-

page_text: nected to a foot lever (not shewn on the drawing). The 'clutch'n'has an arm n'
which when the clutch is moved down to the position shewn in Fig. 1 engages
with the arm G so that the arms G and n' then revolve together but when the
clutch n is raised by the said levers the farm clears the arm G which latter
then remains stationary while the arm n¹ revolves.
Before commencing to bend the channel section bar for a horse shoe the said
bar has to be held 'firmly in position on the flange of the block or mandril A'
which can readily be done by making a hole in one end of the bar which fits on
to a pin in the base or flange-A of the mandril; or one end of the bar can be
turned down to take in the vice q which is opened or closed by the screw 7.
The machine above described operates as follows:-The bar B of a length to
form one horse shoe is held at one end by the vice 7 or otherwise as above described,
the bar resting on the flange A2 channel upwards. Upon the arm G being caused
to revolve (by bringing down the clutch n and arm n' as above described) the
part of the bending tool H enters the channel of the bar B and bears against
its side b, and prevents the sides of the channel closing together while the part h³
of the tool bears against the outside of the bar and by engaging in the cam
groove c', the tool is constrained to follow the curve of the block or mandril A¹
and thus bend the bar to conform with the shape of the block or mandril A¹ as
required.
The parts h³ of the bending tool H, instead of being made of the shape shewn
may be made cylindrical and have a hardened steel or other roller fitting on each
to bend the channel bar and keep the channel open as above described.
Instead of the bending tool being turned by mechanical means as above described
the lever G may be lengthened so that it can be turned by hand.
This invention as above described with reference to bending channel section bars
for horse shoes can be similarly applied to bending channel section bars for other
purposes such for instance as for making certain branding letters or parts of the
same such as the letters B, C, D, J, O, U, and others, the mandril A' and its
flange A2 and the groove or grooves in the cam plate C being made of the shape
to which the bar is required to be bent.
The accompanying drawings illustrate what we consider to be the best way for
carrying the said invention into practice but it is to be understood that the said
invention is not limited to the precise details shewn.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In machinery for bending channel section bars for making horse shoes and for
other purposes, the combination with the block or mandril around which the bar
is to be bent of a bending tool or tools arranged to bend the said bar around or
partly around the block or mandril and meanwhile keep the channel of the bar
open substantially as hereinbefore described and illustrated by the accompanying
drawings.
2. In machinery for bending channel section bars for making horse and other
like shoes the combination of the block or mandril A¹ and its flange A² the lever
arm G and the bending tool H carried thereby and the cam plate C with which
the bending tool H engages all arranged for the purposes and operating together
substantially as hereinbefore described and illustrated by the accompanying
drawings.
3. In machinery for bending channel section bars for making horse and other
like shoes the combination of the block or mandril A' and its flange A' the lever
arm G and the bending tools H and I carried thereby and the cam plate C with
which the bending tools H and I engage all arranged for the purposes and operating
together substantially as hereinbefore described and illustrated by the accompanying
drawings.

page_text: 4. The general combination and arrangement of parts constituting a machine for
bending channel section bars as herein before described and illustrated by the
accompanying drawings.
Dated this 1st day of August 1891.
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.