Improvements in Machines for Shearing Metal Plates.
Year: 1899

page_text: Date of Application, 29th Apr., 1899
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 adapt machines for shearing metal
plates so as in an improved manner to conveniently cut or trim the lateral edges
of plates of considerable length.
In operating on such plates inconvenience and difficulty arises from the scrap
or part severed in shearing or cutting the edges such scrap bending and inter-
fering with the movement of the plate as successive parts are brought into position
to be acted on by the shear cutters which act on a limited length of the plate at
each stroke. By my invention, whilst the machine is arranged to allow of the
plate being moved along step by step parallel to the main cutters, small cross
cutters are provided to cut away portions of the scrap or detached strip severed
by the shears. Such supplementary cross cutters may be arranged in various
ways. According to a simple modification they may be fixed to the movable and
stationary parts of the holders of the main sheers, and at either the entering end
or following end, or in any other suitable or convenient position or positions.
Or the supplementary 'cross cutters may be arranged independently of the main
cutters and be actuated by means of an hydraulic cylinder or in any other con-
venient way.
Dated this Twenty eighth day of April 1899.
EDMUND HUNT,
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:
-w
My said invention has for its object to adapt machines for shearing metal
plates so as in an improved manner to conveniently cut or trim the lateral edges
of plates of considerable length.
In operating on such plates inconvenience and difficulty arises from the scrap
or part severed in shearing or cutting the edges such scrap bending and inter-
Price 871

page_text: fering with the movement of the plate as successive parts are brought into position
to be acted on by the shear cutters which act on a limited length of the plate at
each stroke. By my invention, whilst the machine is arranged to allow of the
plate being moved along step by step parallel to the main cutters, small cross
cutters are provided to cut away portions of the scrap or detached strip severed
by the main cutters or shears.
Such supplementary cross cutters may be arranged in various ways and they
may be applied to various forms of plate shearing machines.
And in order that my said invention and the manner of performing the same
may be properly understood I append two sheets of explanatory drawings to be
hereinafter referred to and showing by way of example, a plate shearing machine
of the kind described in my Patent Specification No. 3880 of 1894 as made with
my present improvements.
Figures, 1, and 2, of the drawings are front and side elevations of the machine.
In these drawings the same reference letters and numerals are used to mark the
same or like parts wherever they are repeated.
The construction of the housings and mechanism for actuating the main cutters
forms no part of my present invention but they may be briefly described as shown
in the drawings. The housings consist of lower castings, A1, A2, upon which
are bolted intermediate castings, A4, A5, upon which rest upper castings,
B1, B2. The upper castings are bolted to the back intermediate piece, A5,
and their forward ends are held down by massive tension rods, D. The motor, E,
through the gearing shown turns the main shaft, G, on which are eccentrics which
act to move the upper cutter, J 1, assisted by an hydraulic cylinder, J 2. The
lower cutter, N, is stationary.
The machine is arranged to allow of the plate being moved along step by step
parallel to the main cutters, J1, N. and according to my present invention small
cross cutters, P, Q, are fixed, one, P, to the vertically guided slide or holder, J,
to which the upper main cutter, J 1, is fixed; and the other, Q, to one end of the
part to which the lower main cutter, N, is fixed. These cross cutters, P, Q, are
provided to cut away portions of the scrap or detached strip severed by the
shears, J1, N. Such supplementary cross cutters, P, Q, may be arranged in
various other ways. Instead of being at the entering end of the machine, as
shown, they may be at the following end or in any other suitable or convenient
position or positions. Or the supplementary cross cutters, P, Q, may be arranged
independently of the main cutters, J1, N, and be actuated by means of an
hydraulic cylinder, or in any other convenient way, and if more convenient the
upper cross cutter may be stationary and the lower one movable.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
In machines for shearing metal plates, the addition of supplementary cross
cutters to act in combination with the main cutters, such cross cutters being
arranged and operating substantially as and for the
purposes herein before
described.
Dated this Sixth day of December 1800
EDMUND HUNT,
Applicant's Agent.