Improvements in Shearing Machines.
Year: 1895

page_text: Date of Application, 22nd Feb., 1895
Complete Specification Left, 21st Nov., 1895-Accepted, 21st Dec., 1895
PROVISIONAL SPECIFICATION.
Improvements in Shearing Machines.
We, WILLIAM BEARDMORE, of Parkhead Forge, Parkhead, in the County of
Glasgow, North Britain, Steel Manufacturer and Forge Master, and DUNCAN
STEWART, of London Road Iron Works, in the same county, Engineer, do hereby
declare the nature of this invention to be as follows, that is to say :-
Our said invention has for its object to improve the construction of shearing
machines, especially when required for shearing heavy metal plates or slabs.
In carrying out our invention we make the framing to consist of two side cheeks
each of which comprises two vertical plates of rolled steel placed apart with
connecting and strengthening blocks between; whilst the two checks are con-
nected by a horizontal cast steel beam, to the inner side of which the stationary
or lower shear cutter is fixed. The upper movable shear cutter is fixed to a
horizontal beam the ends of which are fitted to work in vertical guide slots in the
vertical plates of the frame cheeks. The upper shear beam is connected by short
links to short arms of massive levers having longer arms extending backwards,
these levers being fixed on a massive horizontal rocking shaft extending from one
frame cheek to the other, and carried in bearing bushes in the several plates of the
cheeks, the lever and link at each end being between the two plates of the cheek.
The backwardly extending arms of the levers are connected by rods to trunk
plungers of vertical hydraulic cylinders fixed to the backs of the frame cheeks.
The plungers of the hydraulic cylinders have pistons formed or fixed on their
lower ends, and the annular spaces above the pistons are always in communication
with water under pressure in an accumulator. The bottoms of the cylinders are
in communication with a valve or valves which in one position admits water under
pressure from an accumulator or other source, and the water forcing up the pistons
causes the descent of the upper shear cutter. In another position of the valve or
valves the water exhausts from under the pistons, and then the pressure acting on
the upper annular surfaces of the pistons causes them to descend and raise the
upper shear cutter. At one side of the machine a pair of small clipping jaws
may be conveniently arranged, the movable jaw thereof being worked by means
of a lever on one end of the rocking shaft of the main machine or by a hydraulic
cylinder attached to the side frame and working direct or through a lever.
Dated this Twenty-first day of February 1895.
EDMUND HUNT,
Applicants' Agent.
Improvements in Shearing Machines.
We, WILLIAM BEARDMORE, of Parkhead Forge, Parkhead, in the County of
Glasgow, North Britain, Steel Manufacturer and Forge Master, and DUNCAN
STEWART, of London Road Iron Works, in the same county, Engineer, do hereby
[Price 8d.1

page_text: 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, that is to say :-
Our said invention has for its object to improve the construction of shearing
machines, especially when required for shearing heavy metal plates or slabs.
In carrying out our invention we make the framing to consist of two side cheeks
connected by a horizontal cast steel beam to the inner side of which the stationary
or lower shear cutter is fixed. The upper movable shear cutter is fixed to a
horizontal beam which is vertically guided. The upper shear beam is. connected
by short links to short arms of rocking levers having longer arms extending
backwards and connected to plungers of hydraulic cylinders by means of which
the movable shear cutter is actuated.
And in order that our said invention and the manner of performing the same
may be properly understood we hereunto append three sheets of explanatory
drawings, to be hereinafter referred to, and showing a shearing machine as made
with our improvements.
Figure, 1, on Sheet, 1, of the drawings is a sectional plan, Figure, 2, on
Sheet, 2, is a sectional front elevation, and Figure, 3, on Sheet, 3, is a vertical
section, as at right angles to Figure, 2. In these drawings the same reference
letters and numerals are used to mark the same or like parts wherever they are
repeated.
We make the framing to consist of two side cheeks, each of which comprises
two vertical plates, A, of rolled steel placed apart with connecting and
strengthening blocks, B, between and bound together by bolts. Each distance
or connecting block, B, is provided with a longitudinal stay bolt, B1. The two
cheeks are connected by a horizontal cast steel beam, C, to the inner side of which
the stationary or lower shear cutter, D, is fixed by bolts, E. The upper movable
shear cutter, G, is fixed to a horizontal beam, H, the ends of which are fitted to
work vertically in guide slots in the vertical plates, A, of the frame cheeks. The
horizontal beam, H, is also guided between horizontal beams, K, and L, the ends
of which project through the cheeks, and are fixed by cutters, M, and N, the
beams being formed with shoulders to butt against the insides of the cheeks. The
upper shear beam, H, is connected by short links, P, to short arms of massive
levers, Q, having longer arms extending backwards, these levers being fixed on a
massive horizontal rocking shaft, R, extending from one frame cheek to the other,
and carried in bearing bushes, S, in the several plates, A, of the cheeks, the lever, Q,
and link, P, at each end being between the two plates of the cheek. The backwardly
extending arms of the levers, Q, are connected by rods, T, to trunk plungers, V,
of vertical hydraulic cylinders, W, fixed to the backs of the frame cheeks. The
plungers, V, of the hydraulic cylinders, W, have pistons, V 1, formed or fixed on
their lower ends, and the annular spaces, V 2, above the pistons are always in
communication with water under pressure in au accumulator. The bottoms of the
cylinders, W, are in communication with a valve or valves which in one position
admit water under pressure from an accumulator or other source, and the water
forcing up the pistons, V 1, causes the descent of the upper shear cutter, G. In
another position of the valve or. valves the water exhausts from under the
pistons, V 1, and then the pressure acting on the upper annular surfaces, V 3,
of the pistons causes them to descend and raise the upper shear cutter, G.
At one side of the machine a pair of small clipping jaws may be conveniently
arranged if desired, the movable jaw thereof being worked by means of a lever on
one end of the rocking shaft of the main machine or by an hydraulic cylinder
attached to the side frame and working directly or through a lever.
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 :-
The improved construction, arrangement, and combination of parts constituting

page_text: the shearing machine and more particularly the manner of constructing and
combining the several parts of the framing, substantially as herein before described
and as shown in the accompanying drawings.
Dated this Twentieth day of November 1895.
EDMUND HUNT,
Applicants' Agent.