Improvements in the Method of and Machinery for Bending Cranks.
Year: 1890

page_text: Date of Application, 4th Mar., 1890
Complete Specification Left, 25th Nov., 1890-Accepted, 27th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Method of and Machinery for Bending Cranks.
We, CHARLES COUSINS, of 7, Broadgate, Engineer, and HENRY CLARKE, of
North Scarle, Machine Maker, both in Lincolnshire, do hereby declare the nature of
this invention to be as follows:-
This invention relates to improvements in the method of and machinery for
bending round or square cranks by means of adjustable blocks without the necessity
of "upsetting" or "jumping," and without injuring the iron or steel in bending.
In carrying out our invention we provide a solid block, shaped to the form of the
crank required to be produced, and to which we bolt guide plates. These guide
plates are grooved and are provided with slots in which work pins projecting from
the adjustable blocks. These blocks are acted upon by an upper piece, block, or
head working up and down between the guide plates in the grooves above mentioned.
The bar to be operated upon, having been made hot, is placed in the machine, and
pressure is applied to the upper piece, block, or head which then acts upon the
adjustable blocks, and, the pressure being continued, the bar is bent to form the crank
of the required shape.
Each of the adjustable blocks carries a pair of links furnished with an adjustable
roller, so that, as the upper piece, block, or head descends, the rollers act on the ends
of the bar being bent, and force it up end ways, while the top pressure forces it
downwards to the shape required.
The above mentioned upper piece, block, or head is operated by steam or by
hydraulic pressure.
COMPLETE SPECIFICATION.
Improvements in the Method of and Machinery for Bending Cranks.
We, CHARLES COUSINS, of 7, Broadgate, Lincoln, Engineer, and HENRY CLARKE,
of North Scarle, Machine Maker, both in Lincolnshire, 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, reference being had to
the accompanying drawings and to the letters and figures marked thereon, that is
to say --
This invention relates to improvements in the method of and machinery for
bending round or square cranks by means of adjustable blocks, without the necessity
of "upsetting" or "jumping," and without injuring the iron or steel in bending.
In carrying out our invention we provide a solid block shaped to the form of the
crank required to be produced, and to which we bolt guide plates. These guide
plates are grooved and are provided with slots in which work pins projecting from
the adjustable blocks. These blocks are acted upon by an upper piece, block, or
crosshead, working up and down between the guide plates in the grooves above
mentioned.
The rod or bar to be operated upon, having been made hot, is placed in the machine
and pressure is applied to the upper piece, block, or crosshead which then acts upon the
adjustable blocks, and the pressure being continued, the bar is bent to form the crank
of the required shape.
Each of the adjustable blocks carries a pair of links furnished with an adjustable
roller or rolling block, so that as the upper piece, block, or crosshead descends, the
rollers or blocks act on the ends of the bar being bent and force it up endways,
while the top pressure forces it downwards to the shape required.

page_text: The above mentioned upper piece, block, or crosshead is operated by steam or by
hydraulic power.
In order that our said invention may be fully understood and readily carried into
effect, we will describe the same with reference to the accompanying drawings:
Fig. 1 is a front elevation of the improved crank-bending machine, showing the
parts in their raised positions, with the bar or rod in place ready to be operated
upon.
Fig. 2 is a similar view, but shewing the position the parts assume when the bar or
rod is bent to the required shape to form the crank.
Fig. 3 is a horizontal section on the line A, A, of Fig. 2.
Fig. 4 is an end elevation of Fig. 2.
a is the solid block which is shaped to the form of the crank required to be
produced, and to each side of this block a guide plate b is rigidly secured by means
of the bolts and nuts b'.
c is the upper block or crosshead which is capable of being moved vertically up
and down by steam or hydraulic power, and it is guided in its movements by ribs c¹,
formed on both of its sides, which enter and work in corresponding grooves formed in
the guide plates b.
d, d, are the adjustable rectangular blocks carrying pins d¹, d¹, which project into
and work in the slots 62, 62, formed in the guide plates. To each of these blocks a
pair of links e, e, is pivotted at e¹, e¹, and the other extremities of the links carry
adjustable rollers or rolling blocks e², e², working in slots e³.
When a bar or rod is to be cranked, the upper block or crosshead is first raised
and the adjustable blocks d are turned by means of a suitable tool, inserted through
the holes d², so as to bring their rounded corners d³ into the depressions c² formed in
the upper block or crosshead. The bar or rod f having been previously made hot is
placed into the machine in the position indicated by dotted lines in Fig. 1, and the
adjustable rollers or rolling blocks e² are then caused to press firmly against the ends
of the bar or rod. The upper block or crosshead is now caused to descend and the
lower corners d' of the adjustable rectangular blocks are pressed against the bar or
rod thereby gradually bending it to the required shape. These adjustable blocks
during their descent also turn about their pins d¹ and thus keep the rollers or rolling
blocks, carried by the links e, held against the ends of the bar or rod during the
early part of the bending operation.
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. The method of bending cranks by subjecting the hot bar or rod to be cranked
to the action of a pair of adjustable blocks, such as d, carrying links provided with
rollers or rolling blocks, in combination with a fixed block, such as a, and a movable
cross-head, which latter is operated by steam or hydraulic pressure, substantially as
described.
2. A machine for bending cranks, consisting of a suitably shaped fixed block
provided with slotted guide plates between which are arranged adjustable blocks acted
upon by a crosshead, and of a pair of links in connection with each of the said
adjustable blocks, carrying rollers or rolling blocks adapted to act upon the ends of
the bar or rod under treatinent and to force them up endways while the descending
_crosshead (actuated by steam or hydraulic power) bends the bar or rod to the shape
required to form the crank, substantially as described and shown by the accompanying
drawings.
Dated thin okeh of N 1000
L
th day of November 1990.
ERNEST DE PASS,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicants.