Improvements in Shears and Scissors.
Year: 1892

page_text: Date of Application, 15th Dec., 1892-Accepted, 17th June, 1893
Improvements in Shears and Scissors.
I, PETER KAMPHAUS, Cutler, of Hald, near Solingen, in the German Empire,
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 :-
My present invention has for its object, to construct scissors and shears in such a
manner, that they open more widely or rapidly with a given motion of the handles,
than is the case in ordinary scissors.
In the accompanying drawings,
Fig. 1 is a side view and Fig. 2 an edge view of a pair of shears embodying my
invention; Fig. 3 a side view of the same when open.
Fig. 4 represents a modified form of scissors, when closed, and Fig. 5 the same
when open.
One of the two scissor blades s is not rigidly connected with the handle g, as
usual, but is pivoted to the same by means of a rivet b, while the handle is pivoted
to the other half or blade s¹ (made as usual) by means of a rivet or pin b', which
in Figs. 4 and 5 is situated below the pivot b.
8
The blade has a toothed segment z gearing into a toothed segment ¹ formed
on the blade (or rigidly connected with the latter). c is a retaining spring.
If such a pair of scissors is being opened, the toothed sector 2 causes the toothed
sector z, together with the blades, to turn on the pivot b, in consequence of which
the total angular motion of the said blade is about twice that of the handle 9, and
the points of the blades will therefore move further apart than in the case of
ordinary scissors.
At the same time, there is a slight longitudinal motion of the
blades in relation to each other, that is, one blade is slightly drawn along the other,
and produces what may be called a drawing cut.
This longitudinal motion or drawing cut is more pronounced, if the pivots b
and 6' are placed side by side, as in Figs. 1 to 3, instead of being placed one above
the other.
During the act of closing the shears, the centre of the pivot 6 of the loose
blades describes a short are downward, as indicated in Fig. 3 by a dotted line, and
the blade is therefore drawn downward along the other blade.
This longitudinal shifting continues, even when the shears are nearly closed,
which feature constitutes an advantage over some other devices adopted for the
same purpose, where the sliding motion nearly disappears at the end of the cut.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In shears and scissors, the combination of a handle and moveable blade (s)
having a toothed segment (=), with a handle and fixed blade (s) having a toothed
segment (1), the said moveable blade and segment being arranged in such a manner,
that, when set in motion by the handle g, the moveable blade moves more rapidly
or opens wider than in ordinary scissors, and that it produces a drawing cut,
substantially as described.
2. In scissors and shears of the type specified above, the arrangement of the
pivots band b side by side, instead of one over the other, in order to increase

page_text: described.
the drawing or longitudinal motion of the moveable blade substantially
Dated this 15th day of December 1892.
as
FAIRFAX & WETTER,
433, Strand, London, Agents.