Improvements in Breech-loading Small-arms known as Bolt-guns.
Year: 1893

page_text: Date of Application, 28th Jan., 1893-Accepted, 18th Mar., 1893
COMPLETE SPECIFICATION.
Improvements in Breech-loading Small-arms known as 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 drawing, which forms part of the Specification.
The coupling of the firing-pin with the pin-nut and with the small look of breoch-
loading small-arms known as bolt-guns, has heretofore been effected by screwing
the pin-nut, which works in a slot of the small lock, upon the threaded firing-pin.
This construction possesses the disadvantage that, if the nut is not screwed fully to
its correct position, which fault is casily and frequently committed, the point of the
firing pin protrudes too much, so as to explode the cap in the cartridge even by the
mere closing of the bolt, or, at least, it renders such a mishap possible.
The object of my present invention is to produce a coupling which is impossible
of being fixed together incorrectly, and the use of which absolutely prevents the
above mentioned inconvenience.
In the drawing, in which the same letters of reference indicate similar parts,
Figure 1 is a vertical axial section of a bolt the firing-pin of which is coupled with
the pin-nut and with the small look according to my invention.
Figures 2 and 3 show two elevations of the firing-pin drawn at right angles to
each other.
Figure 4 is an axial vertical section of the pin-nut.
Figure 5 is a cross section of it drawn on the line 5-5 of Figure 4.
Figure 6 is a cross section of the small lock drawn on the line 6-6 of Figure 1.
Figures 2 to 6 are drawn to double the size of Figure 1.
The long part of the firing pin a is cylindrical and at its rear end is turned down
to a short tenon o corresponding in diameter with the round hole o' of the pin-nuts.
The back portion of the firing-pin, for a length, corresponding to the length of the
pin-nut s, is provided with a number of annular grooves b so arranged that one of
the ribs or projections c left standing is broader than the others d. The pin-nuts
is bored out concentrically with the hole o' and of corresponding diameter with that
of the grooves 6 of the firing pin a. This boring is furnished with annular
grooves o d' corresponding with the ribs ed. For shifting the pin-nuts over the
firing-pin a, the latter is flattened along two opposite sides up to the ground of the
grooves b, whilst with respect to the pin-nuts, the ribs 6 standing between the
grooves c'd' are also removed on two opposite sides thereof, as in Figure 4.
done the pin-nuts can be shifted over and along the back portion of the firing-pin a
and then turned so that the ribs cd fit into the grooves o'd' of the pin nut a.
as the ribs c is broader than the others d and fits ouly into the groove c', the pin-
nuts can be turned round the firing-pin a, or vice versa, only when the pin-nut is
pushed over or along the firing-pin a in such way that the ribs a will fit into the
groove c', ie, when the said pin-nuts is in its correct position.
This
But
The sides of the firing-pin a must be flattened for such a distance that, if it is
pushed through the corresponding shaped hole p of the small lock I, the straight
sides of which hole are at an angle of 90° to the sides of the longitudinal slot of
the small look l, the pin-nut a can be pushed up and turned through a space of 90°.
If the firing-pin a is forced forward by the spiral spring actuating it, the pin-nut s
must follow and enter, with the nose q, the slot q' of the small lock 1. After this
the pin-nuts cannot turn any more upon the firing-pin a, which latter is also
prevented from turning as, although it may slide longitudinally in the hole p of the
Amall look . it cannot turn in it.

page_text: From the foregoing description it is clear that it is impossible to fix the pin-nut s
to the firing-pin a incorrectly, and that thereby the possibility is obviated of the
point of the firing-pin protruding too far out of the bolt and exploding the cap of
the cartridge by the mere closing of the bolt.
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. The coupling of the firing-pin (a) with the pin-nut (s) and with the small
look (!) of bolt-guns, by forming upon the back portion of the firing-pin (a), which
is flattened on two opposite sides and slides in a correspondingly shaped hole (p) of' |
the small lock (!), a number of annular ribs, of which one is broader than the others,
and forming inside of the pin-nut (1), which can be pushed over the firing pin (a),
annular grooves corresponding to the sido ribs, so that the pin-nut (s) can only be
turned round upon the firing-pin (a) through an angle of 90° when the pin-nut (s)
is in correct position with relation to the firing pin (a), so that the pose (7) of the
pin-nut (s) can enter the slot (9¹) of the small lock (1), substantially as shown
and described and for the purpose set forth.
2. In bolt-guns, the peculiar combination and arrangement of parts for coupling
the firing-pin (a) with the pin-out (s) and with the small lock (1), substantially as
herein shown and described and for the purpose stated.
Dated this noth day of Jesu 1900
1
PAUL MAUSER,
By Harris & Mills,
23, Southampton Buidings, London, W.C., Agents.