IMPROVEMENTS IN FIRE- ARMS.
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Frank Wirth at the Office of the
Commissioners of Patents on the 14th November 1881. A communication
from Nicolaus Jaberg, of Worms, in the Empire of Germany.
"1
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at
Frankfurt on the Main, in the Empire of Gerinany. IMPROVEMENTS IN FIRE-
ARMS. [A communication from Nicolaus Jaberg, of Worms, in the Empire of
Germany.]
This Invention relates to breech loading fire-arms, and consists in various novel
features of construction and arrangement, the nature of which is hereinafter
described.
In carrying the said Invention into practice the barrel is made slightly conical
or taper, and is provided at the rear with a square part having an opening the
length and width of which correspond with the dimensions of the breech block
which works within it. At the rear the barrel is provided with the usual
extension, which is furnished with two holes for fastening the same. At the
right hand side of the square part provide a device for operating the breech
block. It consists of two plates, lying one upon the other, and between which
is a groove, in which move two screws which fasten the said device to the square
part. At the further end of the slit or opening for the breech block there is a
hole cut right through for the breech block screw, and at the back of the square
part underneath a groove for the reinforcement or strengthening of the main
spring, as also the hole for the main spring pin or screw.
The breech block, which is square and made of steel, is provided at its forward
lower end with a Hat tappet or projection which carries the striking pin, and
which in connection with a catch upon a curved rod effects the cocking. On the
lower surface of the breech block is placed a groove for the mainspring. At the
rear the breech block is bored transversely to receive a screw which connects the
block to the square part of the barrel. The two side surfaces of the block are
hollowed out to lighten the whole.
The main spring is reinforced towards the rear part, and there bored to receive
the main spring screw; at the front part it is forked and provided with a roller
which is fastened between the forked ends by means of a pin. The front end of

page_text: the aforesaid curved rod, which rod lies within the space enclosed by the trigger
guard, is bored and fastened by means of a pin to a stud or piece fixed on the
trigger guard, and can thus turn on that pin as a pivot. A spring in the form of a
horse shoe placed in front of the catch on the rod causes the beut rod to return to
its normal position after each motion.
The trigger, which is secured by means of two pins that move in corresponding
slits in the trigger plate which projects into the casing, is provided with an aperture
for the finger of the person who uses the gun, and there is a spring which pushes
back the trigger after it has been operated.
When it is desired to insert a cartridge the thumb of the right hand pulls the
breech block downwards. Its flat projection glides down the sloping surface of
the catch on the curved rod and presses forward this rod until the block is pressed
so far down that the rod through the pres-ure of the horse shoe spring can be
pushed back and over the flat projection of the block. The rear end of the rod
which by going forward had left the trigger springs at this moment back again
under the same. The act of drawing back the knob of the device which works
the breech block throws out the empty cartridge, whereupon the knob at once
assumes its former position forward. When firing, which is effected by drawing
back the trigger, the curved-rod is set free, the main spring coming into action
throws the catch forward and forces the breech block upwards, whereby the striking
pin is caused to strike the fulminate at the same time at which the block has
accomplished its motion upwards.