Improved Apparatus for Bending Metal Rods, Bars and the like, applicable also as a Vice.
Year: 1896

page_text: Date of Application, 31st Aug., 1898
Complete Specification Left, 30th Apr., 1897-Accepted, 17th July, 1897
Improved Apparatus for Bending Metal Rods, Bars and the like,
applicable also as a Vice.
I, CARL LEISTNER, Engineer, of 22 Bloomfield Road, Burdett Road, E., in the
County of London, do hereby declare the nature of this invention to be as
follows:-
The present invention consista in a machine, on which by means of hand pressure
all sorts of rolled iron up to a certain thickness can be bent to a required angle in
an unheated state either edgeways or flatways.
The construction of the machine is the following:
•
On a basis or foundation plate provided with a slot, and which can be fastened
upon a work bench by means of sorews, a second plate is superposed, which by a
mandrel or spike is tightly attached to the former. This mandrel moves with its
free lower end in the slot of the lower plate, so that the two plates can slide sideways
upon one another.
On the second or upper plate is placed a third one of semicircular form and
divided into two halves, the one of which is movable in a circle round the upper
end of the mandrel.
This movement is rendered possible by a handle fixed to this movable part, and
a steady motion of the same is obtained by a groove made on the brim of the second
plate in which moves a tenon fastened on the revolving plate.
Upou the third or semicircular plate are placed on each half a tightening jack
which is vertically movable and by means of which the iron bars or sheets to be
bent are kept firmly in their place, whilst on the first plate or the basis of the
machine a horizontally movable vice jack or clamp is placed on the left hand side
and aloped on the right hand side.
This clamp is there for the purpose to give the iron pieces to be bent and kept
tight by the tightening jacks the necessary counter support while they are being
bent into any given angles.
The sloping of the clamp is necessary to enable the movable part of the
semicircular plate to turn sufficiently to the left hand side if acute angles must be
produced. A sideward jerk of the clamp, which might possibly be brought about
by great pressure is prevented by a supporting plug fixed on its left hand side to
the foundation plate. On this plug is placed a scale which can be moved up and
down vertically in order to be able to carry out the bending of the irons in one and
the same place.
If iron parts are to be bent edge ways they are laid underneath the two
tightening jacks and tightened down. Likewise the clamp or vice jack is placed
sideways along the iron and fixed there, whereupon by the turning movement of the
movable plate by means of the handle the required angle is obtained.
If pieces of iron shall be bent flat ways, they are simply placed against the
notched front sides of the tightening clamps and pressed against these by the jack,
in which case the scale is used as a support. In this case it is important that the

page_text: right hand side angle of the clamp should be close to the point where the angle is
to be produced, that is to say close to the turning point of the inovable plate.
If on the contrary round or open angles are to be produced, the foundation plate
and the second plate are moved sideways on one another by means of an adjusting
contrivanco for which caso the mandrel has its guidance in the slit of the
foundation plate.
By this transposition the right hand corner of the clamp is removed to the left
from the turning point and on bending the piece of iron fixed as above indicated
the angle obtained has no sharp edges, but is rounded.
The handling of the machine, which may also be used as an ordinary vice, is as
follows:
As soon as the iron is fastened in the proper manner as has been described above,
according to whether it is to be bent flat ways or edge ways, the whole movable
part of the machine which turns round the mandrel is forced round to the right by
ineans of the handle. By the fact that in thus turning the movable part of the
machine, the one end of the iron extending along it is forcibly making the same
movement and either an acute or a rounded angle is produced according to the
mutual position of the two lower plates.
The angle to be produced in each given case can easily be found by a scale
designed on the second plate.
If stronger pieces of iron are to be bent they have to be heated once, which
however is still a great saving of time in comparison with the usual methods of
hammering and the repeated measuring and trying of the pieces of iron.
Dated this 31the day of August 1896.
COMPLETE SPECIFICATION.
Improved Apparatus for Bending Metal Rods, Bars and the like,
applicable also as a Vice.
I, CARL LEISTNER, of 22 Bloomfield Road, Bow, E., in the County of London,
Engineer, do hereby declare the nature of this invention and in what manner the 30
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
The present invention consists in a machine on which by means of hand pressure
all sorts of rolled iron up to a certain thickness can be bent to any given angle in
an unheated state either edgeways or flatways.
In the accompanying drawing
Fig. I represents a top view of the machine when closed.
Fig. II is a section of Fig. I from X to X.
Fig. III shows a top view of the machine when drawn out.
Fig. IV is a section of Fig. III from y to y.
Fig. V gives a side view of the machine with a T iron put in position.
Fig. VI is the same side view with a cylindrical bar of iron put in for bending.
Fig. VII is a top view of the machine showing its position in bending an obtase,
right or acute angle.
3
40
Fig. VIII is another top view of the machine when drawn out ready for hending 4
metal bars into rounded angles.
The construction of the machine is the following:
On a basis or foundation plate a provided with a slot band which can be fastened

page_text: upon a work bench by means of screws, a second plate c is superposed, which by a
mandrel or spike d is tightly attached to the former. This mandrel moves with its
free lower end in the slot b of the lower plate, so that the two plates a and c can
slide sideways upon one another. (Fig. II & IV).
On plate ca third one of semicircular form and divided into two halves e¹ and e³
is placed, of which e' is movable in a circle round the upper end of the mandrel d.
This movement is rendered possible by a handle or lever f fixed to this movable
part and a steady motion of the same is obtained by a groove made on the brim
of the plate in which moves a tenon y fastened on the revolving plate.
(Fig. II & IV).
Upon the plate e' e are placed two tightening jacks h, k, which are vertically
movable and by means of which the iron bars or sheets to be bent are kept firmly
in their position, whilst on plate a horizontally movable vice jack or clamp i is
placed on the left hand side, this clamp being sloped on the right.
The clamp serves the purpose of giving the pieces of metal to be bent into any
given angles the necessary counter support, while they are kept tight by the
tightening jacks h, h¹.
The sloping of the clamp i is necessary to enable the movable plate e' to turn
sufficiently to the left whenever acuto anglos must be produced.
A sideward jerk of the clamp i, which might possibly be produced by great
pressure is prevented by a supporting plug fixed on its left hand side to the
foundation plate a.
On this plug is placed a scale m, which can be moved vertically up and down in
order to be able to do the bending of the iron in one and the same place.
If iron parts are to be bent edgeways they are placed underneath the two
tightening jacks h h and tightened down; then the vice jack i is placed sideways
along the iron and fixed there, whereupon by turning the movable plate &* by
means of the handle f the required angle is obtained.
In this case it is important that the right hand side angle of the clamp i should
be close to the point where the auglo is to be produced, that is to say close to the
turning point o of the movable plate e'. (Fig. I & VIII).
If pieces of iron shall be bent flatways, they are simply placed against the notched
front sides of the tightening clamps h hi and pressed against these by the jack i
(Fig. III) in which case the movable scale is used as a support.
If on the contrary rounded or open angles are to be produced, the plates a and o
are moved sideways under one another by means of an adjusting arrangement 11,
for which case the mandrel & has its guidance in the slit b (Fig. II & IV).
By this transposition the right hand corner of the clamp i is removed sideways
from the turning point (Fig. III) and on bending the piece of iron fixed as above
indicated the angle obtained has no sharp edges, but is rounded. (Fig. VIII).
The handling of the machine, which may also be used as a parallel vice is as
follows:
As soon as the iron is fastened in the proper manner as has been described
above, according to whether it is to be bent flatways or edgeways, the whole
movable part of the machine which turns round the mandrel d, and consists of
plate e and the tightening jack h' is pulled round in the direction of the arrow by
means of the handle f..
By this movement the end of the iron placed before it is forcibly bent round in
the same direction and either a sharp or a rounded angle is produced at the turning
point o, according to the mutual position of plates a and c.
The angle to be produced in each given case can easily be found by a scale p
placed on plate c.
If very strong pieces of iron are to be bent they have to be heated once but even
n this case a great deal of time is saved in comparison with the usual method
of hammering and the repeated measuring and trying of the pieces of iron.
Having now particularly described and ascertained the nature of my said inven.

page_text: tion and in what manner the same is to be performed, I declare that what I
claim is :
A machine for bending all sorts and shapes of rolled iron to any required angle
either edgeways or flatways, characterized by the circumstance that the piece of
iron fixed between tightening jaoks h h, and the vice jack or clamp i is bent either
edgeways or sideways in an unheated state by the circular movement of the
movable tightening jack round the mandrel d in such a manner, that according
to the plates a and c lying upon one another or being shifted sideways under each
other, either sharp cornered or rounded angles are produced.