Safety-trigger for Breech-loading Bolt-guns.
Year: 1892

page_text: Date of Application, 14th Apr., 1891-Accepted, 4th June, 1892
COMPLETE SPECIFICATION.
Safety-trigger for Breech-loading Bolt-guns.
I, PAUL, MAUSER, of Oberndorf on the Neckar, in the Kingdom of Württemberg
and Empire of Germany, Manufacturer, 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, reference being had to
the accompanying drawings and to the figures and letters marked thereon:-
The object of the invention is a trigger arrangement for breech loading bolt
guns which prevents the firing of the gun as long as the bolt is not completely
closed. Heretofore it has been possible to pull the trigger and to fire the gun even
if the bolt handle had not been turned into its completely closed position, so that
the pin nut struck upon the back face of the bolt. Therefore the point of the pin
could not run sufficiently far out of the bolt to explode the cap or detonator of the
cartridge, notwithstanding the close state of the gun is a safe one. It therefore
became necessary to re-open the breech for re-placing the pin nut behind the
trigger nose and then to re-make the closing of the breech. The present invention
makes it impossible to pull the trigger prior to the bolt being brought into its
completely closed position.
In the accompanying drawing
Figure 1 is a side view of the breech portion of a gun at the moment of its
being fired.
Figure 2 is a cross section on the line 2-2 of Figure 1.
Figure 3 is a cross section on the same line representing the bolt not completely
closed.
Figure 4 is a side view of the breech portion, the bolt being pulled back for
about three centimetres, and the case in section.
Figure 5 is the top view of the trigger with its frame removed from the gun.
The new arrangement consists of a box shaped frame a pivotted at m to a pro-
jection on the underside of the breech case c. At the end of the longer or rear
portion of the frame a, it is provided with the trigger nose b, and at the end of the
shorter or forward portion, with the upright stop d. This stop d may be made in
one piece with the frame a or screwed, similar to a set screw, into it. The
trigger g, furnished as usual with fulcrum, neck, and finger piece or trigger proper,
swings between the walls of the frame a round the pin n and bears by the fulcrum
against the underside of the case c. In the upper side of the forward portion of
the frame a is provided a chamber or cup containing a coiled spring s having the
tendency to press the trigger nose b upwards and the stop d downwards. The
dimensions are chosen in such way that, while the smooth portion of the bolt k
is above the nose 6 and the stop d, the trigger proper can make scarcely any
motion, as is shown in Figure 4. Should the bolt k now be pushed forward and
closed completely, it would nevertheless be impossible to fire the gun because the
trigger nose b is prevented by the stop d from being drawn downwards.
For making it possible to fire it is therefore necessary to give to the trigger
nose 6 a capability of motion in this completely closed position. This is done by
milling out of the bolt a suitable indentation o just at the place where the stop d
bears against the bolt k in its completely closed position, so that the stop d can
enter sufficiently deep into the bolt to allow the nose b to be moved downwards, in
pulling the trigger proper, enough for clearing the pin nut, when the pin may be
thrown forwards. This position is represented in Figures 1 and 2.
If the bolt is not brought completely into its closed position, the stop & cannot
enter into the indentation o, and the gun cannot therefore be fired. This position
of the narta is shown he Figure 3

page_text: Notwithstanding the simplicity of this new device, it efficiently prevents the
above mentioned inconveniences and guarantees also a complete closing of the
bolt k.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A safety trigger for breech loading bolt guns characterised by a frame a
actuated by a springs and pivotted at m to a projection on the underside of the
breech case c, the rear portion of such frame a having the trigger nose b, and the
forward portion, the stop d mounted thereon in such manner that the nose b and
the stop & bear simultaneously against the smooth portion of the bolt k, in com-
bination with the trigger g swinging between the walls of the frame a, to which the
trigger g is pivotted, and with an indentation o made in the bolt k in such position
that the stop d can enter this indentation only when the bolt kis turned in the
completely closed position, substantially as herein shown and described and for the
purpose set forth.
2. A trigger device for breech loading bolt guns pivotted to the breech case and
provided with a trigger nose and a stop bearing simultaneously against the smooth
portion of the bolt, so that the trigger cannot be moved except when an indentation
made in the bolt is brought into the proper position for the stop to enter therein,
substantially as herein shown and described and for the purpose explained.
Dandh: 14h 1.
11000
PAUL MAUSER,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.