Improvements in the Construction of Hand-shears
Year: 1899

page_text: Date of Application, 19th Dec., 1899-Accepted, 20th Jan., 1900
COMPLETE SPECIFICATION.
Improvements in the Construction of Hand-shears
I, ERNEST HENRY TRIESCHMANN, of Number 130, Reed Street, in the City and
County of Milwaukee and State of Wisconsin, United States of America, Manu-
facturer, 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:-
This invention has for its object to improve the construction of hand-shears,
so as to render the same easier of operation and capable of longer cut in propor-
tion to the length of the blades than the ordinary hand-shears, and to these ends
it consists, primarily, in constructing the handles with forward branches in crossed
pivotal connection, and with independent blades, each of which has pivotal con-
nection with a handle back of the crossing of the handle-branches, and a slide
and play-slot connection between each blade and the forward end of the branch
pertaining to the handle other than that to which said blade is pivoted; secondly,
in forming a curved slot in each of said independent blades to receive the pivot
that unites the said handle-branches; and finally, in making said handle-branches
in the form of forks, with recesses in the rear thereof, and in widening each of
said independent blades at the rear and providing each blade with an offset tang
having pivotal connection with a handle back of the crossing-pivot, and forming
the said curved slot in the widened portion of each blade, whereby in operation,
the said widest portion of each blade is always close against the like portion of
the other blade, to form a brace to prevent springing of said blades incidental
to the resistance of the material being cut, all as hereinafter particularly set
forth with reference to the accompanying drawings, and subsequently claimed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 represents a plan view of the preferred form of a pair of hand-shears,
embodying my said invention parts being broken away, or shown in section, to
better illustrate certain details of construction.
Figure 2 is a detail partly sectional view of a portion of said hand-shears..
Referring by letter to the drawings AB represent the handles, and CD the
independent blades of my improved hand-shears. Forked forward branches of
the handles have cross engagement with each other on a pivot-bolt or rivet b that
extends through a curved slot c in each of the blades. Each blade is widened at
its rear to provide for the curved slot, and an offset tang d of each blade has
loose engagement with a recess in the adjacent handle, back of the fork of the
same, to which handle it is pivotally secured by a pivot bolt e. The fork branches
of each handle are connected by a rivet f that constitutes a slide passing through
a play-slot 9 in the blade that has its tang in pivotal connection with the other
handle, said slide being forward of the crossing of the handle-branches.
As
herein shown, an anti-friction sleeve h may be arranged on each slide f in the
corresponding play-slot g, and one branch of each handle-fork is shown provided
with a spacing-shoulder i in opposition to the adjacent blade.
The angle of the play-slot g may be varied from what is herein shown, and if
said slots be more lengthwise of the blades, the shears will have less opening

page_text: than is shown in Figure 1, although the separation of the blades back to the
crossing of the handle-branches will be more rapid than otherwise, and while I
have shown the preferred form of my improved hand-shears, the details of con-
struction may be somewhat varied without departure from my invention, as for
instance the described slides f might be upon the blades, and the play-slots g
in the fork-branches of the handles, but this is so obvious that I have not deemed
it necessary to illustrate the same in the drawings.
From the foregoing it will be understood that shears, of any desired length of
blade, made in accordance with my invention, may be readily spread to have a
greater length of cut than is possible with ordinary single-pivot shears, and the
degree of opening between blades may be more or less in proportion to the angle
of the play-slot g, and hence my improved shears may be organized with especial
reference to the cutting of different kinds of material. It is also to be observed
that the widest portion of each blade is close against the like portion of the other
blade, forming a brace to prevent springing of said blades incidental to the resis-
tance of the material being cut.
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. The herein described improvement in hand-shears, comprising the handles
having forward branches in crossed pivotal connection, the independent blades,
each of which has pivotal connection with a handle back of the crossing of the
handle-branches, and a slide and play-slot connection between each blade and the
forward end of the branch pertaining to the handle other than that to which said
blade is pivoted.
2. The handles having forward extending branched portions that are crossed
on a pivot, and the independent blades each of which is pivoted to one of the
handles back of said crossing-pivot, and provided with a curved slot engaged by
said pivot, and a slide and play-slot connection between each blade and the for-
ward end of the branch of the other handle.
3. The handles having forked forward branches in cross-engagement with each
other on a pivot and recessed back of the forks, and independent blades widened at
the rear and provided with offset tangs having pivotal connection with said handles
in the recesses of the same, together with curved slots in the said widened portions
of the blades in engagement with said crossing pivot; angularly disposed play-slots
in said blades forward of the crossing point of said handle-branches; and rivets
connecting the fork-branches of each handle and forming slides in engagement
with the play-slots in the opposite blades, said widened portions of the blades
being always in contact and forming a brace to prevent the springing apart of
said blades in operation.
Signed this 19th day of December 1899
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.