IMPROVEMENTS IN CARTRIDGES
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said Thorsten Nordenfelt at the
Office of the Commissioners of Patents on the 26th February 1883.
•
THORSTEN NORDEN FELT of N° 53 Parliament Street in the City of Westminster
"IMPROVEMENTS IN CARTRIDGES
ور
This Invention has for its object. improvements in cartridges and relates more
especially to cartridges such as are used with machine guns of considerably larger
dimensions than the military or Martini-Henry cartridges.
My methods of construction are illustrated by the annexed drawings.
In Figure 1 a is a drawn metal case b is an iron or steel disc, it is reduced in
diameter at b to the same diameter as the case, that it may enter with. it into the
barrel. 6 is the recess in the disc which receives the cap. c is a cup of iron steel
or hard brass inserted into the case a. d d are rivets holding the parts together.
In Figure 2 the cup c has a stud c¹ projecting from it to screw into a hole in the
disc b. The recèss for the cap is in the stud c¹.
In Figure 3 a like stud b+ is provided on the disc b to screw into a hole in the
cup c.
In Figure 4 the part b is made cup shaped and receives the case a within it, the
exterior of the case has a thread upon it and screws into the part b. This part
also has a stud in the centre which projects through the case and is rivetted over.
In Figure 5 the construction is similar to Figure 4 but an inner cup c is
employed and the parts a and b do not screw together, rivets being employed as in
Figure 1.
.
The projectiles are usually of iron coated with a softer metal such as.copper by
electro deposition and rings are produced over the coating to take the rifling of the
barrel by depositing the metal to a greater thickness at the parts where the rings
are required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thorsten Nordenfelt in the Great Seal Patent Office on the
25th August 1883.
THORSTEN NORDENFELT of N° 53 Parliament Street in the City of Westminster.
"IMPROVEMENTS IN CARTRIDGES
"
This Invention has for its object improvements in cartridges and relates more
especially to cartridges such as are used with machine guns of considerably larger
dimensions than the military or Martini-Henry cartridges.
My methods of construction are illustrated by the annexed Drawings.
In Figure 1 a is a drawn metal case. b is an iron or steel disc it is reduced in
diameter at b¹ to the same diameter as the case that it may enter with it into the
barrel: 6 is the recess in the disc which receives the cap. cis a cup of iron, steel
or hard brass inserted in the case a.. d. d. are rivets holding the parts together.
In Figure 2 the cup c, has a stud c. projecting from it to screw into a hole in the
disc b. The recess for the cap is in the stud c¹.
In Figure 3 a like stud 6x is provided on the disc 6 to screw into a hole in the
cup c.
In Figure 4 the part 6 is made cup shaped and receives the case a within it.
The exterior of the case has a thread upon it and screws into the part b. This
part also has a stud in the centre which projects through the case and is rivetted
over.
is
In Figure 5 the construction is similar to Figure 4.but an inner cup c.
employed and the parts a and b. do not screw together rivets being employed as in
Figure 1..
The projectiles are usually of iron coated with a softer metal such as copper by
electro deposition rings being produced over the coating to take the rifling of the
barrel by depositing the metal to a greater thickness at the parts where the rings
are required as described in the Specification of a former Patent granted to me
N° 891 in the year 1882 but other forms of projectile may be used..
Having thus described the nature of my Invention and the manner of performing
the same I would have it understood that I claim :-..
First. The construction of the cases of cartridges of a cylinder a of thin drawn
metal closed at the base and with the base held between a cup c. and solid disc b
of the same diameter as the cylinder a. and having a flange around its outer end
substantially as described.
a
Second. The construction of the cases of cartridges substantially in the ways
herein before described and illustrated in the Drawings hereunto annexed.
In witness whereof I the said Thorsten Nordenfelt have hereunto set my hand
and seal this twentieth day of August in the year of our Lord : One thousand
eight hundred and eighty three.
THN NORDENFELT. (L.s.)