Improvements in Shears, Scissors, and Nippers.
Year: 1891

page_text: Date of Application, 6th Nov., 1891-Accepted, 12th Dec., 1891
COMPLETE SPECIFICATION.
Improvements in Shears, Scissors, and Nippers.
1, CARL HAMANN of Reinbeek in the Kingdom of Prussia, Gentleman, 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 relates to shears or scissors and principally to those used for
cutting metal or other hard substance and also to nippers for cutting or severing
wires and the like, and the object of the improvements is to increase the power or
operative action of such tools. Heretofore shears and scissors have been made in
various ways so that the one blade is movable during the cut to give a shearing or
knife like cut, in contradistinction to the simple pressing cut of the ordinary
scissors, this invention however provides that both the blades should operate with
a shearing cut with regard to the material operated upon, and this is effected by
giving to each blade a separate closing movement apart from the movement upon
the ordinary cross bolt or pin which connects and serves as a pivot for the two
handles.
The invention is illustrated in the drawing hereto annexed.
Fig. 1 is a view of shears made according to the invention in the manner
hereinafter described, shown partly open and with one of the limbs broken away.
Fig. 2 is a similar view of the same shears nearly closed.
Fig. 3 is a side view and Fig. 4 is a cross section on line m m of Fig. 1.
Fig. 5 is a view of the head of a pair of nippers, in open position and partly
broken away.
Fig. 6 is a similar view of these nippers nearly closed and Fig. 3 is an end view
thereof.
Referring to Figs. 1 to 4. A. A' are the two handle pieces or limbs of the
shears pivoted on the pin e. Each of these limbs is carried beyond the pivotal
point in the form of an extension B B¹ each of which engages with the respective
blade M M by a pin or studs and slot r. Each of the blades M M is pivoted to
the respective limb A' A on the same side as the blade by a pin or bolt a'r at a
point preferably handlewards of the pivotal pin e. Each blade therefore is
engaged by a pin and slot to one handle or its extension and is pivoted to the other
handle. The blades are shaped so that the bolt e does not hinder their movement.
Considering the pin e as the point on which the scissors or shears open and close,
as the shears are closed the pins al move downward with regard to the said pin e.
This movement draws both the blades M M' downward as the slot r allows and so
gives the blades each a sliding cut on the material operated upon.
The blades in the nippers (Figs. 5 to 7) operate and move in exactly the same
way the same letters of reference indicating corresponding parts. To give strength
however to the cut the blades are prolonged below to form two heels which
coming together as the nippers close give a good bearing for the leverage on the
blades M M ensuring that the latter shall always meet closely. The pins s also
preferably have square collars sliding in the oblong slots r for greater strength in
the construction.
Although such shears etc. as are above described are intended to be used for
cutting metal, the same method of construction may be applied to surgical scissors,
tailors shears, nail scissors or others.
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.) In scissors shears and nippers the combination with the two handles of two
D

page_text: blades movable severally on bolts or pins on the said handles apart from the pivotal
pin or bolt connecting the said handles substantially as described.
2.) In scissors shears and nippers the combination with two cross pivoted
handles A. A with extensions B B₁, of two blades M M pivoted severally to
the respective handles on the same side as said blades and guided by the extensions
of the other handles for the purpose set forth.
3.) In cutting tools constructed as claimed in Claim 1 or 2 the construction of
the blades with prolonged heels za¹ as and for the purpose set forth.
Dated this 6th day of November 1891.
HERBERT & Co.,
18, Buckingham Street, Strand, W.C., Agents to Applicant.