IMPROVEMENTS IN POCKET KNIVES
Year: 1884

page_text: We EDMUND JANSEN and AUGUST BÖNTGEN and LOUIS SABIN the two latter
doing business under the firm of Bontgen & Sabin all three of Solingen, German
Empire do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
POCKET KNIVES."
This Invention relates to improvements in the construction of pocket knives of
that class in which the blade, when opened, is held fast by a pin entering a recess
or an aperture in the blade. Ordinarily the said pin is operated by a pin outside
the casing of the knife.
This Invention has for its object to provide improved means for operating the
pin. To this end a part of the casing, close to the pin on which the blade is
pivotted is hinged or otherwise movably connected with the main portion of the
casing. The loose portion carries the pin first hereinbefore mentioned and is fitted
with a spring in such a manner that it will always tend, to push the pin into a
corresponding aperture in the blade. In the back of the .handle or casing a spring
may be mounted which presses upon the blade tang and tends to open the knife.
Dated this 25th day of January 1884.
COMPLETE SPECIFICATION.
We EDMUND JANSEN and AUGUST BÖNTGEN and LOUIS SABIN, the two latter
doing business under the firm of Böntgen and Sabin, all three of Solingen, German
5 Empire do hereby declare the nature of this Invention for "IMPROVEMENTS IN
POCKET KNIVES and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :—
The present Invention relates to an arrangement in pocket knives for fixing the

page_text: It differs from the arrangements heretofore known essentially inasmuch that the
pin for fixing the blade is not moved by a ring fixed on the outside of the handle
which is in the way when the knife is to be used but simply by depressing a check
piece as will appear from the following description.
In the accompanying Drawings,
Figure 1 shows the knife half open.
Figure 2 the knife seen from the back.
Figures 3 and 4 sections through the movable check piece for fixing the blade.
The blade a is capable of rotating on the pin a³ of the handle b; at each side
of as it has small holes a¹ and a³ the first of these, when the knife is being closed,
passes under the pin d¹ of the check piece d; this pin will, by the action of the
spring drivetted to the part n of the casing, slip into the hole a¹ on the blade and
fix the latter; the same takes place with regard to the other hole a² of the blade a
when the latter is entirely opened as shown in dotted lines in Figure 1.
As has already been referred to, the fixing of the knife-blade by pins pressed
against the same by side springs has been long known what however is new is the
peculiar manner of so arranging' the side spring that the blade is loosened by
simply depressing a check piece.
To this end the hollow check & carrying the pin d is so connected by the
spring d² mounted thereon with the part u and the shape of the same is such, that
the inward end of the same is capable of being depressed in recesses u? at the side
of u the check swinging upon the rims u' formed by the recesses (see Figure 4)
and the pin moves out from the hole in the blade so far, that the blade may be
opened. In the present case the blade is automatically pushed outward by a
spring c which as a rule joins the back of the knife and is flush therewith, the
blade may then be entirely opened by hand.
During this time the check spring d² is kept under tension until, when the blade
is entirely open, the check pin d' falls into the hole a¹ so that the open blade is
fixed. By using the check d for operating the sidespring d² and the pin d², this
construction surpasses all arrangements for the same object in simplicity and
convenience for use..
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is,
.. 1
1.1
A pocket knife with fixing pin d' acted upon by side springs d³ for the blade
and having the check piece d for actuating the pin.