Improvements in Scissors and Shears.
Year: 1890

page_text: Date of Application, 4th Oct., 1890-Accepted, 8th Nov., 1890
COMPLETE SPECIFICATION.
Improvements in Scissors and Shears.
I, JULIUS LANGENBERG, of Ohligs near Solingen, in the Kingdom of Prussia and
German Empire, Manufacturer, do hereby declare the nature of this invention and
in what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
My invention relates to scissors and shears and has for its object the providing of
means to increase their efficiency in cutting.
The scissors and shears at present in use cut only when the two blades are pressed
against each other. Persons who are in the habit of using such instruments hardly
notice this, particularly when the pivot firmly unites the two blades; but anybody
using scissors or shears can easily ascertain this disadvantage particularly by handling
scissors or shears the blades of which have become loosened by the pivot having
worn. In such case even if considerable pressure is used to cut thin material, the
blades do not cut from the commencement of their travel that is to say near the pivot,
but only from about the middle of the blades towards the points or ends of the latter
which have been bent towards each other during hardening.
Various efforts have been made to avoid this disadvantage, particularly by doing
away with the pivot or guiding pin, but neither of these methods have proved
satisfactory.
The desired result cannot be obtained by doing away with the pivot or guiding
pin but by giving additional support to the same, which is the object of this
invention.
In order that my invention may be the better understood I now proceed to describe
the same with reference to the accompanying drawings and to the letters and figures
marked thereon. Like letters refer to like parts throughout the figures.
Figure 1 shows my improved scissors when closed.
Figure 2 shows the same scissors open, as seen from the opposite side.
Figure 3 shews the commencement of the inner side of the blade with the hole for
the pin d.
Figure 4 shews the arrangement of the pin d through the part 6 and the method of
screwing the spring e connected to the pin d on the part b at f
Somewhat below the pin a another pin dis arranged on the upper part 6 of the
scissors or shears which acts on the lower part c through a hole by means of a spring
pressure. By this means the two blades are pressed against each other automatically
without using any hand pressure during cutting, even if the pin should become some-
what loosened by the screw being unscrewed or worn. This ensures the blades cutting
the material during the whole cutting movement from the point where the edges meet
towards the ends.
In ordinary scissors, as shown in the drawings, the pin d need only protrude very
little through the part 6 see Figure 4, while in large scissors or shears, the blades of
which are not so close together, the pin must be correspondingly longer.
The length of the protruding end may be regulated by the spring e being screwed
at fon to the upper part 6 where the movement commences; in this case the pin d
presses against the lower part c with increased pressure the more the screw f is screwed
home.
The latter arrangement allows of the pin d being placed out of action.
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 :-
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page_text: shears by the application of pressure between the blade
pivot to that of the cutting edges of the said scissors or
2nd. In such scissors or shears the application of pr
pin d arranged on the part 6 of the scissors or shear
same to press on the other part c, the amount of such
the spring e and the screw, substantially as described.
Dated this 4th day of October 1890.
upon the opposite side of the
hears.
nre between the blades by the
and protruding through the
pressure being regulated by
FELL & WILDING,
1, Queen Victoria Street, Agents for the Applicant.