Improvements in or connected with Hand Shears for use in Cutting Tin Plate and similar Material.
Year: 1898

page_text: Date of Application, 19th Apr., 1898 -Accepted, 30th July, 1898
COMPLETE SPECIFICATION.
Improvements in or connected with Hand Shears for use in Cutting
Tin Plate and similar Material.
I, BRUNO WESSELMANN, of 58, Friedlander Weg, Gottingen, 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 hand shears which are used for cutting tin plate
and similar sheets of metal. Such shears as at present constructed suffer from
the disadvantage that the cut portions of the plate jamb against the bearing
bosses or portions of the blades, and as the cutting proceeds the cut parts of the
plate must be excessively bent, one part in a downward, and the other part in
an upward direction.
Owing to these disadvantages the progress of the work is greatly hindered, and
in cases of thick plates the work is rendered very fatiguing.
The object of my invention is to overcome these defects.
And in order that my invention may be more fully understood I will now
refer to the annexed sheet of illustrative drawings.
In the said drawings.
Fig. 1 is a side elevation of my improved shears.
Fig. 2 is a plan of the same and
Fig. 3 is an end sectional view on the line x-x Fig. 1.
In hand shears constructed in accordance with my invention the cutting
blades a and are so arranged in relation to each other, that the lengthened
bearing portion a¹ of the blade a lies upon an angular abutment u forming part
of the bearing 61 of the blade b, the angular piece u being arranged in the rear of
the cutting blade a. This arrangement will be clearly seen from an inspection
of the drawings. By this contrivance the cut portions cc of the plate c can
both be led downwards beneath the pivot stud o, thus only necessitating a very
slight bending of the plate sufficient to prevent it from coming into contact with
the hand grasping the shears.
The course of the cut portions of the work will be readily noted from an in-
spection of the drawings, the portion being conducted between the bearing
half a of the shears and the top of the angular abutment u whilst the portion c¹
is directed below the abutment u formed on the half of the shears. The
traversing of my improved shears through the work is thus effected with greater
ease, as the bending of the plates is only of the slightest so that very little friction
or springing together of the cut portions is set up."
The shears may either be forged or cast and can be provided with separate
blades i made from special steel, which may be secured to the blades a and b
by means of screws or in any other suitable manner.

page_text: 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:―
The improved hand shears for cutting tin plate and the like in which the
blades are so arranged relatively to each other that the bearing a¹ of the blade a
lies upon an angular abutment u carried by the bearing 6 of the blade in the
rear of cutting blade a whereby excessive bending of the cut portions of the
work, and the checking of the cutting process is avoided substantially as described
and illustrated.