Improvement in Pocket Knives and analogous Folding Instruments.
Year: 1893

page_text: Date of Application, 21st Dec.; 1893
Complete Specification Left, 20th Sept., 1894-Accepted, 20th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvement in Pocket Knives and analogous Folding
Instruments.
I, GUSTAV PAFFRATH, Manufacturer, of Solingen, in the German Empire, do
hereby declare the nature of this invention to be as follows:-
This invention relates more particularly to the means for opening pocket knives
having two or more blades.
I employ one or more two-armed levers placed in the casing of the knife
underneath the blades and arranged in such a manner, that by pressing on the back
of a blade when closed the said lever or one of the levers is caused to turn on its
fulcrum and thereby to lift another blade.
In the case of a knife having two blades and two levers, one arm of a lever is
placed under one blade and in contact with the base or root of the same (near
the pivot of the blade), while the other arm of the same lever is under the
base or root of the other blade, which has its fulcrum near the opposite end of the
casing.
When fully opened or closed, the blades are retained in the usual manner by
means of springs. The cutting edges of the blades are not in contact with the
same, but leave a clearance which allows a slight motion downward, when the blade
is closed, and the back of the blades project over the casing.
.
After a blade has been partly lifted by a pressure on the opposite blade, it can be
easily grasped with the hand and fully opened.
Instead of knife-blades, scissors and other suitable instruments may be arranged
in the same manner.
Dated this 21st day of December 1893
FAIRFAX & WETTER,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvement in Pocket Knives and analógous Folding
Instruments.
I, GUSTAV PAFFRATH, Manufacturer, of 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:-
This invention relates more particularly to the means for opening pocket knives
having two or more blades.
In the further description of this invention reference is made to the accompanying
drawings. In these,
Fig. 1 is a closed pocket knife, shown in elevation. Fig. 2 is the same, but showing
the application of the pressure of the thumb to open a blade.
Fig. 3 is the same as Fig. 1, but with an outer sheath of the handle removed to
show the arrangement of the blades and levers when in the closed position.
Fig. 4 is the same as Fig. 2, but with an outer sheath removed to show the
action.
I employ one or more two-armed levers, h, h placed in the casing of the knife
underneath the blades and arranged in such a manner, that by pressing on the back
רנס.SD

page_text: of a blade when closed, as shown in Figs. 2 and 4, the said lever or one of the levers
is caused to turn on its fulcrum and thereby to lift another blade.
In the case of a knife having two blades and two levers, as in Figs. 3 and 4, one
arm of a lever is placed under one blade and in contact with the base or root of the
same (near the pivot of the blade) while the other arm of the same lever is
under the base or root of the other blade which has its fulcrum near the opposite
end of the casing.
When fully opened or closed the blades are retained in the usual manner by
means of springs. The cutting edges of the blades are not in contact with the
same, but leave a slight motion downward, when the blade is closed, and the back
of the blades project over the sheath or casing of the handle. In Fig. 1 the
depressions are shown one at each end of the handle to allow of thumb pressure
being exerted to produce the aforesaid downward motion.
After a blade has been partly lifted by a pressure on the opposite blade, it can
be easily grasped with the band and fully opened; or it is sometimes entirely lifted
by the said pressure, and opened as in Figs. 2 and 4.
Instead of knife-blades, scissors and other suitable instruments may be arranged
in the same manner.
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 :-
The herein described improvement in pocket knives, or analogous folding
instruments consisting of one or more two-armed levers each end being situated
under the pivoted end of a folded blade, so arranged, and operating by exterior
pressure at the end of one blade, that the blade at the other end is wholly or
partially opened, substantially as and for the purpose described and illustrated by
the drawings.
Dated this 19th day of September 1894.