Year: 1886

page_text: Date of Application, 29th Sept., 1886.
Complete Left, 23rd June, 1887.
Complete Accepted, 28th July, 1887.
I, THORSTEN NORDENFELT of 53 Parliament Street in the City of Westminster
Civil Engineer do hereby declare the nature of this invention to be as follows:-
This Invention has for its object an improved extractor for fire arm, in general more
especially for machine guns. It is a spring extractor to be applied to a breech bolt
and preferably it has a double claw or hook which grips over the flange of the cartridge.
As the bolt is drawn back the extractor brings with it the empty cartridge case.
The improved extractor can be put into its place on the bolt by hand without tools
and without any special pieces for fixing it to the bolt.
The fore part of the blade of the extractor on the end of which the claws are formed
is a strong spring or stiff. The after part of the extractor blade is a weaker spring
which yields to allow the claws to pass over the flange of the cartridge. Between
these parts on the inner side of the extractor blade is a hook like projection which
enters an undercut recess in the bolt, it there becomes engaged and by means of it the
extractor is fixed to the bolt. At the hinder end of the extractor blade on the inner
side there is a projection which when the extractor is put in and thrust forward to its
place springs into a recess in the bolt and so retains the extractor. In the bolt (which
contains the firing pin) a shallow slot or groove is cut to receive the extractor and
about midway in this slot or groove is the deep recess to receive the middle hook like
part of the extractor by which it is fixed.
In fixing the extractor to the bolt it is placed with the two claws close up to the
face of the bolt, and the middle part or lug then pressed down with the thumb into
the recess in the bolt; when this is down the extractor is pushed forward, until the
projection at the rear end of the extractor blade snaps into the recess provided for it.
To remove the extractor from the bolt I proceed in the following manner :-I
insert a pointed tool under the rear end of the extractor blade, into notch in the bolt
provided for the purpose and so I lift this part of the blade until the projection is out
of the recess, then I force the extractor back until it is free.
Dated this 90th day of Santember 1886
CARPMAEL & Co.,
Agents for the Applicant.

page_text: I, THORSTEN NORDENFELT of 53 Parliament Street in the City of Westminster
Civil Engineer 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 has for its object an improved extractor for fire arms in general
more especially for machine guns. It is a spring extractor to be applied to a breech
bolt and preferably it has a double claw or hook which grips over the flange of the
cartridge. As the bolt is drawn back the extractor brings with it the empty cartridge
case.
The improved extractor can be put into its place on the bolt by hand without tools
and without any special pieces for fixing it to the bolt.
The fore part of the blade of the extractor on the end of which the claws are formed
is a strong spring or stiff. The after part of the extractor blade is a weaker spring
which yields to allows the claws to pass over the flange of the cartridge.
Between these parts on the inner side of the extractor blade is a hook like projection
which enters an undercut recess in the bolt, it there becomes engaged and by means
of it the extractor is fixed to the bolt.
At the hinder end of the extractor blade on the inner side there is a projection
which when the extractor is put in and thrust forward to its place springs into a
recess in the bolt and so retains the extractor. In the bolt (which contains the firing
pin) a shallow slot or groove is cut to receive the extractor and about midway in this
slot or groove is the deep recess to receive the middle hook like part of the extractor
by which it is fixed.
In fixing the extractor to the bolt it is placed with the two claws close up to the
face of the bolt, and the middle part or lug is then pressed down with the thumb into
the recess in the bolt; when this is down the extractor is pushed forward, until the
projection at the rear end of the extractor blade snaps into the recess provided for it.
To remove the extractor from the bolt I proceed in the following manner :-I insert
a pointed tool under the rear end of the extractor blade, into a notch in the bolt
provided for the purpose, and so I lift this part of the blade until the projection is out
of the recess, then I force the extractor back until it is free.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a plan of an extractor and breech bolt constructed and arranged in
accordance with my invention.
Figure 2 is a longitudinal section of the same.
Figure 3 is an end elevation partly in section and
Figure 4 is a longitudinal section of the parts separate the one from the other but
in position to be made to engage.

page_text: a is the breech bolt and a¹ is the passage therein to receive the firing pin. This
breech bolt is grooved longitudinally to receive the extractor and the recesses a²
and a are also formed in it. Also a groove ax to facilitate the dismounting or
separation of the parts. b is the extractor 6' 6' the claws by which it lays hold of the
flange of the cartridge. 6 is the hook like projection for retaining the extractor upon
the breech bolt. The part 63 of the blade of the extractor in front of the projection b²
yields but little or not at all as the claws of the extractor rise over the flange of the
cartridge case. The part in rear of the projection yields and provides the
necessary elasticity for the action of the claws. The part 6, is thickened at the end
and forms a stud ** adapted to fit the recess a³. The way the parts are put together
has been already explained; they are placed as shown in Figure 4 and then the
extractor blade is bent by pressure upon it until the extractor can be thrust forward
to make the hook engage. Then the stud 64×, drops into its recess as seen in
Figures 1 and 2.
To separate the parts a tool (such as a screw driver) is inserted by the groove ax
beneath the part 6 of the blade and this is then prized up and pressed rearwards.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :--
1. The improved spring extractor constructed and applied substantially as
described.
2. A spring extractor provided with a hook like projection on its under side
between its two extremities which hook like projection enters a recess in the
breech bolt and when the extractor is moved end wise engages therein substantially as
described.
3. The combination in a spring extractor of the hook like projection 6 and the
spring blade 6 in rear thereof; the latter entering a recess a³ in the breech bolt and
thereby locking the extractor in place substantially as described.
Dated this 17th day of June 1887.
THN. NORDENFELT.