Improvements in Metal Shearing Machines.
Year: 1897

page_text: Date of Application, 28th Sept., 1897-Accepted, 27th Nov.,
1897
COMPLETE SPECIFICATION.
Improvements in Metal Shearing Machines.
I BRUNO WESSELMANN of 54 Friedländer Weg, Göttingen, in the Empire of
Germany, 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 and accompanying drawings:-
'
My said Invention relates to improvements in metal shearing machines, and refers
to metal shearing machines in which the blades are disposed at right angles to each
other, the lower shearing blade being set horizontally, or practically horizontally to
the upper movable blade. The invention consists in the arrangement or provision
of two blades in the lower bed. These two blades are each provided with two cutting
edges, and either lie adjustably one upon the other or are fixed in a reversible
bearer or bed. By these means four separate cutting edges are available when using
the shears, these separate cutting edges being obtained either by the simple turning
of the blades which lie one upon the other, or by turning the reversible bearer or
bed.
And in order that my said invention may be more fully understood I will now
describe the same more fully, reference being had to the accompanying drawings.
In the said drawings.
Fig. 1 is a front view and
Fig. 2 a plan of a metal shearing machine provided with two-blades lying one upon
the other in the lower limb.
Fig. 3 is a longitudinal section of the line x-x Fig. 2.
Fig. 4 is a cross section on the line y-y Fig. 2.
Fig. 5 is a front view of a shearing machine with reversible lower bed.
Fig. 6 is a vertical section of Fig. 5 and
Fig. 7 is a plan view.
Referring in the first place to Figs. 1 to 4 the reversible lower shearing blades
are marked a a¹, b is the upper blade operated by the lever k or other suitable means.
The two horizontal blades a a¹ are arranged one upon the other, so that they may
be adjusted relatively to each other, and also by sliding in the lower bed c relatively
to the movable blade b.
The fixing screws & Fig. 1 (marked d¹ d¹ in Figs. 2 to 4) of the blades, for this
purpose fit tightly in the upper blade a, but a slot 2 is formed in the under blade a¹
to receive the screws, thus rendering the blade a¹ adjustable. Another slot d³ is
formed in the lower bed c to receive each fixing screw d (or d¹) so that the
adjustment of the blade relatively to the movable blade b may be readily effected by
means of the set screws f.
In order that the blade b may clear the lower blade a¹ in its descent, the blade a¹
is pushed backwards relatively to the upper blade a. It will thus be seen that by
reversing and adjusting the blades a a¹ all four cutting edges and 2 of the
blades a a¹ and 3 and of the blades a¹ may be brought into-use.
In the arrangement shown in Figs. 5 to 7 the same object is attained by fixing the
horizontal blades a a¹ in a carrier or bed c' which is capable of being reversed in its
position in the frame of the shearing machine.
Du 01

page_text: The four cutting edges of the blades may thus be adjusted relatively to the upper
blade without removing the blades from their bed, simply by reversing the bed.
In the machine as illustrated the framing is constructed of two end standards g g
which provide bearings for the longitudinal bars h. The blade b and the operating
lever k are carried upon the two top bars and the two lower bars are arranged to
carry the adjustable shearing bed c². The reversal of the shearing bed c¹ is effected
either by drawing it from the bars (when the ends of these at one side of the machine
are free) or by removing the bolts and taking the two halves of the bed apart.
The arrangement described with reference to Figs. 5 to 7 is particularly adapted
for cutting strips of a particular breadth from metal plates, as the upper blade b and
lever and the lower blade and bed may be adjusted at will upon the bars h
according to the breadth of the strips to be cut. For instance the distance of the
blades b and a from the right hand standard g which serves as an abutment or guide
for the metal plate can be adjusted to the requisite breadth of strip.
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:
(1) In a metal shearing machine having the blades arranged at an angle to one
another, the provision of two blades a a¹ resting one upon the other and adjustable
relatively to each other, so that according to the adjustment and reversal of the
blades a a¹ each of the four cutting edges i¹²³ may be brought into operation
in the manner and substantially as described and illustrated with reference to
Figs. 1 to 4 of the drawings.
(2) In a metal shearing machine of the indicated nature the two blades a a¹
carried in a reversible bed c¹ for the purpose of bringing four cutting edges into
operation in the manner and substantially as described and illustrated with reference
to Figs. 5 to 7 of the drawings.
Dated this 27th day of September 1897.
For the Applicant,
E. K. DUTTON & Co.,
5 John Dalton Street, Manchester, Chartered Patent Agents.