Improvements in Pocket or Clasp Knives and the like.
Year: 1890

page_text: Date of Application, 23rd July, 1890-Accepted, 1st Nov., 1890
COMPLETE SPECIFICATION.
Improvements in Pocket or Clasp Knives and the like.
We BRUNO VON BÜLTZINGSLÖWEN, MAX LEVY, and FELIX SAMUEL KLOTZ, all
of 26 Church Street New York City, County and State of New York, United States
of America, Gentlemen, 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 to improvements in pocket- or clasp-knives and the like and
consists in arranging the blades resting in the case or handle, so that they are brought
into their opened position necessary for use by a flat spring fastened to the inner
surface of the stationary back of the case upon disengaging or locking-mechanism
taking the place of an ornament used heretofore on the cover of the case, said blado
being thereafter held unmovable by said mechanism when folding the blade into the
case force is not necessary to overcome the resistance of the back-spring, but this is
done by simply folding down the knife after having previously disengaged the locking-
mechanism and the blade is kept again in the handle by the said mechanism.
Fig. 1 is an elevation of the knife.
Fig. 2 shows the blade in closed position in the handle one side of the case being
removed.
Fig. 3 shows the blade open for use.
Fig. 4 is the inner metal plate of the case M in elevation.
Fig. 5 is a longitudinal section of the same.
Figs. 6 and 7 represent the side plates of the case M and P with locking lever F
and securing device B for said mechanism inserted.
Fig. 8 shows the locking mechanism.
Fig. 9 is a section on line xx Fig. 2.
Fig. 10 is a section on line y y Fig. 3.
Fig. 11 shows the arrangement of two blades at the two ends of the case.
Fig. 12 is a section on line z z Fig. 11.
Fig. 13 is the back-view of the knife with the slide B* for securing the locking
lever F.
Fig. 14 is a modified arrangement of the locking-lever F in the stationary
back R.
Fig. 15 is a modification of the blade.
gears
The blades K are made circular at their inner ends K*, Figs. 2, 3 and 11 so that
they finish exactly on the same lines as the sides at the ends of the case, and in com-
bination with the back R occupy the whole of the space at the ends of the case
Fig. 12. In the part K* of the blade are the notches a a* diametrical from the
pivots, (Figs. 2, 3, 9-12) and the projection o located on the locking plate F
into one of these notches, when the blade is in its open or closed position respectively.
There is also the notch e corresponding to the nose R¹ of the back R, the said nose
lying in the notch e when the blade is open (see Figs. 3 and 11). By providing this
notch e the blade receives a firm support and the more so since the nose rests firmly
upon the circular part K*. On the inner surface of the back R is arranged the flat
spring f, which is tensioned when the blade is folded into the case.
The locking mechanism Fig. 8 consists of the lever F with the projection o for the
wo notches a and a of the blade, the turning-pin g, the notch h for the slide B
(Fig. 6) the pressure button and the heel n, the latter being a rest for the flat
pring located on the metal plate M, Figs. 9, 10 and 12. The metal plate M Fig. 4
as well as the covering plate P are cut away to receive the locking lever F and are each

page_text: provided with a recess g¹ for receiving the turning-pin g Fig. 7. The recess 1 (Fig. 5)
of the metal plate M serves for receiving the flat-spring r for the lever F. The
blades K are located in the case so that backs of the blades are level with the edges
of the case.
In this position of the blade the projection o on the lever F gears into
the notch ax of the blade and keeps the blade in the handle. If the knife is to be
opened for use, the button on the lever F is depressed Figs. 9, 10 and 12 until the
projection o leaves the notch ax of the blade. The blade is now thrown into the
extended position necessary for use, Figs. 3, 10 to 12, by the spring f previously
in tension Fig. 2, until the notch e comes over the part R¹ of the back R. The
notch a passes in front of the projection o, which is thereupon pressed therein by
the flat spring tensioned during the pressing down of the button k, thus securing
the blade in its extended position. To refold the blade into the bandle, the
projection o is removed from the notch a of the blade by pressing down the
button k, and the blade is inserted into the handle close to the spring by putting
the knife into an oblique position. A slight pressure is then sufficient to insert
the blade into the case so that the projection o passes into the notch a* now
located below, thus securing the blade within the handle. In order that the blades
may not become accidentally disengaged by an involuntary pressure upon the
button during the carrying of the knife in the pocket or during the use of the
same, a slide B provided with a button B* gears into a corresponding notch
the lever entering at the back between the two handle-covers through a groove
arranged in the upper handle-cover P, thus preventing the lever from moving.
When one desires to use the knife, said slide is removed from the lever by means
of the button B* and when the blades is adjusted it is again inserted. In Fig. 14
the lever F is arranged in the back-band R of the case and the projection o'
gears into the notches in the part K* of the blade K arranged laterally to
the pivot. The same takes place also with four or more bladed knives and the
mechanism in the handle-covers is used for the blades located nearest to it. In
Fig. 15 however there are both above and below the pivot two_notches a¹ a² and
consequently also two projections o must be provided on the lever F.
in
These improved pocket knives may have any shape used heretofore, the shape
of the case changing with the respective shape of the blades. The blades by their
covered position are protected from dust or moisture and therefore do not rust.
The term "blado" is herein intended to cover knife blades, saw blades or
other fittings usually found in clasp knives to which these improvements are
applicable.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare what we
claim is :
In pocket or clasp knives and the like.
1). The combination with a blade or its equivalent having two recesses or sets
of recesses near the pivot thereof, of a pivoted lever having a projection or
projections adapted to engage in the one or other recess or set of recesses when
the blade is in its opened or closed position, a spring operating to press said lever
to engage said projection or projections in said recess or recesses, and a button on
said lever for release of the blade by hand substantially as set forth.
2). The combination with a vibrating lever adapted to lock the blade in its
opened or closed position, of a sliding bolt with projections thereon for its movement
by hand said bolt being located in the cover of the case and adapted to engage
in a recess in the vibrating lever aforesaid whereby the latter is held unmovable
for the purpose set forth.
3). The combination of a blade loosely pivoted in the case with a spring f located
in the case and adapted to throw open said blade, and a locking lever having a
projection adapted to enter recesses in the blade and to hold the same closed or open
substantially as set forth.

page_text: 4). The combination of a case with a rounded end or ends, a back strap or
filling with nose R and a blade with circular part K* and recess e relatively
arranged and assembled for the purpose set forth and a locking lever having a
projection or projections adapted to engage in recesses in the blade, whereby the
latter is locked in closed or opened position.
39 1
11
1060
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicants.