IMPROVEMENTS IN SCISSORS FOR CUTTING HEAVY MATERIALS
Year: 1880

page_text: LETTERS PATENT to Carl Kesseler, of 63, Mohrenstrasse, Berlin, W., in the
Empire of Germany, Patent Solicitor, for an Invention of "IMPROVEMENTS IN
SCISSORS FOR CUTTING HEAVY MATERIALS." A communication from Theodor
Fischer, of Solingen, in the Kingdom of Prussia
COMPLETE SPECIFICATION filed by the said Carl Kesseler at the Office of
the Commissioners of Patents on the 12th April 1880.
CARL KESSELER, of 63, Mohrenstrasse, Berlin, W., in the Empire of Germany,
Patent Solicitor. "IMPROVEMENTS IN SCISSORS FOR CUTTING HEAVY MATERIALS."
A communication from Theodor Fischer, of Solingen, in the Kingdom of Prussia.
These improvements consist in causing, by special arrangements, a longitudinal
movement of the scissor blades respectively to each other besides the usual
displacement of the angle between them. By this means heavy materials, such as
solid leather, heavy or folded textile fabrics, and even metals can be easily cut;
this action is based upon the prevention of the object which is to be cut from
slipping or advancing during the cutting, and also under the gradually decreasing
cutting angle it is not only severed in the manner common with scissors, but in
consequence of the displacement of the scissor blades it is actually cut through.
The annexed Drawing represents the arrangement of such scissors. Fig. 1 shows
the two blades with their cutting edges turned outwards. The blade A is provided
with the usual hole a forming a feinale screw for taking in the bolt, separately
represented in Fig. 3, which bolt will serve as the axis of motion for the two
blades; this bolt is provided below its head with a kind of washer b, and on its
opposite end with the check nut c. In an arc, whose centre is at a, are arranged on
the inner surface of A three (or a greater or smaller number of) cylindrical studs
or pivots d, d', d, which take like the teeth of gearing into the teeth of the rack,
which is formed by one side of a depression in the blade B; on the other side this
depression is bordered by a slot f piercing B. If the two blades are laid together,
as shown in Fig. 2, and screwed together by means of the bolt, shown in Fig. 3, the
lutter will take its position at one end of the slot f. When the scissors are opened
the studs d, c, d, which are arranged in an are, by taking into the teeth of the
rack e will cause the two blades to advance upon each other, as illustrated by
Figs. 4 & 5. When the two blades are pressed together this action of geuring

page_text: and the displacement take the opposite direction, namely, in such direction as will
draw in the material to be cut, and will not, as in all the usual forms of scissors,
give it a tendency to slip forward. When these hand-power scissors with internal
gearing are put together they can externally hardly be distinguished from ordinary
scissors. The gearing is altogether hidden, and can cause no inconvenience. The
washer b covers alınost entirely the slot f, and the check-nut e prevents the
spontaneous unscrewing of the bolt, Fig. 3, which moves in the slot during tho
action. It has to be remarked that the power causing the longitudinal displacement
remains constant, whilst the action of the scissors proper demands more force as
the scissors close.
Having now described my Invention, and the best method of performing the
same, I wish it to be understood that what I claim and desire to protect under the
herein before in part recited Letters Patent is,—
Hand-power scissors in which is produced, besides the usual severing, a cutting
action by the toothed segment formed on one blade by means of projecting studs or
pins gearing with a rack formed on one side of a depression in the other blade, the
other side of this depression being bordered by a guide-slot, substantially as set
forth and shown in the accompanying Drawings.
In witness whereof, I, the said Carl Kesseler, have hereunto set my hand
and seal, this Twelfth day of April, One thousand eight hundred and
eighty.