Improvements in Shearing Machines.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Shearing Machines.
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 shearing
machines, and in carrying out my invention according to one modification,
I construct the framing mainly as described in my Patent Specification No. 3880
of 1894, any other suitable framing of adequate strength may, however, be used
in combination with my present improvements which relate principally to the
apparatus for moving the upper or movable shear cutter. Above the cutter and
a little to the inner side of it I arrange a massive horizontal shaft which may
be in a single piece or in two parts coupled together and which is carried in
end bearings in the side frames or cheeks.
The
The shaft has formed ou it horn-
like projections or short levers which when turned down by rotation of the shaft,
act through toggle links upon the beam to which the upper movable shear
cutter is fixed. After each downward stroke the cutter beam is raised by means
of an hydraulic cylinder the ram of which is connected to the beam.
toggle links are jointed to the beam at their bottom ends and their upper ends
are connected by short links to the horns which act on them.
turned by means of long levers keyed on its ends, the back ends of these levers
being acted on by hydraulic cylinders at the outer sides of the cheeks or side
frames.
The shaft is
Instead of the toggle-link arrangement, the cutter beam may be acted on.by
eccentrics on the upper horizontal shaft; or sets of pinion teeth on the shaft
may be arranged to gear with toothed vertical racks fixed to or formed on the
cutter beam, rollers being applied to the fronts of such racks to sustain the
outward thrust of the action of the pinion teeth.
Dated this Twenty-first day of February 1895.
EDMUND HUNT,
Applicant's Agent.
Improvements in Shearing Machines.
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 shearing
machines and in carrying out my invention I construct a framing mainly as
described in my Patent Specification No. 3880 of 1894, any other suitable
framing of adequate strength may however be used in combination with my
present improvements, which relate principally to the apparatus for moving the
DO77

page_text: upper or movable shear cutter. Above the cutter, and a little to the inner side
of it, I arrange a massive horizontal shaft, which may be in a single piece, or in
two parts coupled together, and which is carried in the side frames or cheeks.
The horizontal shaft acts through intermediate parts on the beam to which the
upper movable shear cutter is fixed; and moves the beam downwards equally
at both ends of it, notwithstanding that the shear strain takes place at
successively different points along the shear cutter.
And in order that my said invention and the manner of performing the same may
be properly understood 1 hereunto append two sheets of explanatory drawings to
be hereinafter referred to and representing a shearing machine as made with one
modification of my present improvements.
Figure, 1, on Sheet, 1, of the drawings is a front elevation of the machine a
plate being shown in section in a position for being operated on.
Figure, 2, is a side elevation of the machine.
In these drawings the same reference letters are used to mark the same or like
parts wherever they are repeated.
The lower part, A, of each cheek or side standard is made in a separate
casting, which may be cast with front extensions meeting each other and formed
with heavy flanges by means of which they can be rigidly bolted together; or
they may be connected, as shown in Figure, 1, by a middle front casting, B,
to which they are bolted by means of heavy flanges. The lower fixed shear
cutter, C, is fixed to the inside of the upper part of the middle front casting, B,
and of the front parts of the side castings, A; and the plate, D, to be sheared
rests on the top of those front parts. Across between inner upwardly extended
parts of the side_castings, A, a girder, E, extends and is bolted to them; and
distance pieces, F, are bolted to the back parts of the same side castings, A.
The upper parts, G, of the cheeks or side standards rest on the girder, E, and
on the distance pieces, F; and are held down by massive tension rods or long
bolts, H, partly indicated by dotted lines in Figure, 2, these bolts extending
from the tops of the pieces, G, to the bottoms of the base pieces, A. The top
pieces, G, are, further secured at their back parts by bolts, J, extending down
through the distance pieces, F, to the base pieces, A.
A massive horizontal shaft, K, represented in Figure, 1, as in two parts
coupled together at the middle, is placed parallel to the front of the machine,
being held in bearings in the top pieces, G, of the cheeks or side standards.
The shaft, K, has formed on it horn-like projections or short levers, L, which
when turned down by rotation or rocking of the shaft, act through toggle
links, M, upon the beam, N, to which the upper movable shear cutter, P, is
fixed. The toggle links, M, are jointed to the beam, N, at their lower ends
and their upper ends are connected to the levers, L, by pairs of small links
indicated by dotted lines in Figure, 2. The beam, N, works in V-guides formed
or fixed on the front of the girder, E. The shaft, K, is turned by means of
comparatively long levers, Q, keyed on its ends, the back ends of these levers, Q,
being connected to the rams of oscillating hydraulic cylinders, R, at the outer
sides of the cheeks or side standards.
After each downward stroke the cutter beam, N, is raised by means of an
hydraulic cylinder, S, fixed on a small girder, T, bolted to the top cheek pieces, G,
its ram being by means of a crosshead and side rods, U, connected to the beam.
When a plate of comparatively small thickness has to be sheared it may be
sufficient to employ only one of the two hydraulic cylinders, R; or a machine
constructed for small thicknesses only may be made with a single cylinder, which
may be arranged in any convenient position.
Instead of the toggle-link arrangement the cutter beam, N, may be acted on by
eccentrics on the upper horizontal shaft, K; or sets of pinion teeth on the shaft
may be arranged to gear with toothed vertical racks fixed to or formed on the
cutter beam, N, rollers being applied to the fronts of such racks to sustain the
outward thrust of the action of the pinion teeth.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The construction, combination, and arrangement of parts constituting the
improved shearing machine substantially as hereinbefore described.
2. The moving of the upper shear cutter of a shearing machine by means of a
horizontal shaft placed parallel to the line of shearing action, and arranged and
operating substantially as hereinbefore described.
Dated this Twentieth day of November 1895.
EDMUND HUNT,
Applicant's Agent.