Improvements in Machines for Shearing Metal Plates.
Year: 1894

page_text: Date of Application, 23rd Feb., 1894
1011
4005
Date of Application, 23rd Feb., 1894
Complete Specification Left, 22nd Nov., 1894-Accepted, 19th Jan, 1905
PROVISIONAL SPECIFICATION.
Improvements in Machines for Shearing Metal Plates.
"
I, ANDREW LAMBERTON, of Sunnyside Engine Works, Coatbridge, in the
County of Lanark, North Britain, Engineer, do hereby declare the nature of this
invention to be as follows, that is to say :-
My said invention has for its object to improve the construction of machines
for shearing metal plates, and especially to render such machines when of large
sizes more capable than as hitherto constructed for withstanding the heavy strains
to which they are subjected. Hitherto the housings or framings of such machines
have generally been made of castiron; but when the dimensions and thickness of
that material have to be considerable for the desired strength, there is great risk of
its being internally unsound and it is not reliable; besides, the bulk and weight
becomes very inconvenient.
In
In carrying out my invention I make the housings or framings of the machine to
consist of separate castings of moderate size; and I combine therewith massive
tension rods or long bolts of wrought iron or steel so placed as to sustain the strains
of working in the best manner. Thus in a shearing machine of a kind required in
steel and other works and having horizontal shearing cutters acting vertically, the
bottom one being fixed and the upper one moved by cranks or eccentrics on an
upper rotating shaft which shaft is carried by the upper lateral parts of the
housings, there is a space between the upper parts of the housings for the passage
through of plates, and gaps are formed in the housings to allow of the entrance in
beyond the shearing cutters of plates not passing through the middle space.
making such a machine according to my invention, I form the lower part or base of
the machine in two or more castings, and I form each lateral upper part in a separate
casting which may rest directly on the base part or on one or more interposed
distance pieces. The several castings are suitably fitted together with planed joint
surfaces and counterpart checks; and massive long bolts or tension rods are placed
in a vertical or inclined position so as to pass through the base part of the framing
close to the inner side of the gap, and through each upper lateral part of the
framing. These long bolts can be made of suitable dimensions and of metal the
quality of which can be safely relied on; and they will satisfactorily sustain
the strains of shearing the thickest plates if suitably proportioned for such work.
Dated this Twenty-second day of February 1894.
EDMUND HUNI,
Applicant's Agent.
Improvements in Machines for Shearing Metal Plates.
I, ANDREW LAMBERTON, of Sunnyside Engine Works, Coatbridge, in the
County of Lanark, North Britain, Engineer, 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, that is to say :-
My said invention has for its object to improve the construction of machines

page_text: for shearing metal plates, and especially to render such machines when of larger
sizes, more capable than as hitherto constructed of withstanding the heavy strains
to which they are subjected. Hitherto the housings or framings of such machines
have generally been made of castiron; but when the dimensions and thickness of
that material have to be considerable for the desired strength there is great risk of
its being internally unsound and it is not 'reliable; besides the bulk and weight
become very inconvenient.
In carrying out my invention I make the housings or framings to consist of
separate castings of moderate size; and I combine therewith massive tension rods
or long bolts of wrought iron or steel so placed as to sustain the strains of woraing
in the best manner.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings to
be hereinafter referred to and representing a plate shearing machine of a kind
required in steel and other works, and having horizontal cutters acting vertically,
this machine being made with my improvements.
Figures, 1, and, 2, of the drawings are front and side elevations of the machine;
and in these figures, the same reference letters and numerals are used to mark the
same or like parts wherever they are repeated.
The lower part or base of the machine consists of two (or it might be more)
castings, A 1, A 2, the front parts of which extend towards each other and are
bolted together with flanges, A 3, whilst there is some space between the after
parts. Upon each of the base castings, A 1, A 2, there are bolted intermediate
castings or distance pieces, A-4, A 5, upon which rest the upper parts, B1, B2, of
the housings. At their back ends these upper housing pieces, B1, B2, are bolted
to the back intermediate pieces, A. 5, and are additionally secured by long bolts, C,
extending down to the bottom of the base castings, A 1, A 2. The forward parts
of the upper housing pieces, B1, B2, are held down by massive tension rods or
long bolts, D, which extend from the tops of the upper housing pieces down to the
bottom of the base castings, A 1, A 2. The strain of the shearing action tends to
lift the upper housing pieces, B 1, B 2, and is satisfactorily and completely resisted-
by the long bolts, D, in such manner that little or no tensional strain can take
effect on castiron parts er bolted flanges. The upper housing pieces, B1, B2, are
not bolted to the distance pieces, A 4, under their forward parts; and they are
therefore free to rise in the event of the long bolts, D, stretching, thus avoiding
strain on castiron flanges. The bearing surfaces of the distance pieces, A 4, are
.formed with a check; and in addition a ring indicated by dotted lines, A 6,
Figure, 2, is fitted into recesses in each distance piece and each upper housing
piece.
The arrangement of the gearing and some other parts forms no part of my
present invention, but may be briefly described as shown in the drawings, my
improvements being, however applicable with any other suitable arrangement.
The motor apparatus which is contained on the machine comprises a pair of steam
cylinders, E, driving a crank shaft, F, having on it a pinion gearing with a spur-
wheel, F1, on a shaft, F 2, which has on it two pinions gearing with two spur-
wheels, F 3, on the main shaft, G, these three shafts being in bearings in the upper
housing pieces, B1, B2. On the shaft, G, are eccentrics (indicated by dotted lines
in Figure, 2) which act on connecting pieces, H, jointed to the vertically guided
slide, J, to which the upper cutters, 1, are fixed. The asceut of the cutter
slide, J, is effected or assisted by an hydraulic cylinder, J 2, to the ram of which it
is connected by rods, J 3. The lower cutters which are stationary are fixed to the
inner side of the top of the parts of the base castings, A1, A2, which meet each
other at the front of the machine. A pair of studs, K, are provided for holding
down the plate, I., whilst being sheared, these studs being held and moved by a pair
of rods, K1, acted on by small hydraulic cylinders, K 2, upon a cross bar, K 3, fixed
to overhanging parts of the upper housing pieces, B1, B2.
When shearing a plate across it is entered over the front parts of the base

page_text: castings, A1, A2, and so as to pass towards the back between the lateral parts of
the housings. Provision is also made for shearing a plate longitudinally, a gap, M,
being formed at each side to admit the part of the plate to be cut off, the plate
being moved across the front of the machine to receive the successive cuts that may
be required.
Having now particularly described and ascertained the nature of my said inveu-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. Constructing and combining the parts and more particularly the framing of
machines for shearing metal plates, in the improved manner, substantially as herein-
before described.
2. In machines for shearing metal plates, making the upper and lower parts of
the housings or framings in separate castings, and providing to resist the strain of
the operation of the machine by applying tension rods or long bolts to connect the
said upper and lower parts, substantially in the manner hereinbefore described.
Dated this Twenty-first day of November 1894.
EDMUND HUNT,
Applicant's Agent.