U.S. patent number 3,861,069 [Application Number 05/448,081] was granted by the patent office on 1975-01-21 for firing mechanism in double-barrel guns.
Invention is credited to Olof Torgny Heurlen.
United States Patent |
3,861,069 |
Heurlen |
January 21, 1975 |
FIRING MECHANISM IN DOUBLE-BARREL GUNS
Abstract
A firing mechanism in double-barrel guns is provided, the firing
mechanism including a single trigger which can be moved generally
laterally by the marksman's finger between alternate firing
portions, for selectively firing either barrel. Also, a
key-operated lock means is provided for locking the movable trigger
in a non-firing, safety position..
Inventors: |
Heurlen; Olof Torgny (191 45
Sollentuna, SW) |
Family
ID: |
27484503 |
Appl.
No.: |
05/448,081 |
Filed: |
March 4, 1974 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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308250 |
Nov 20, 1972 |
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Foreign Application Priority Data
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Jun 29, 1972 [SW] |
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8590/72 |
Jun 7, 1971 [SW] |
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7388/71 |
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Current U.S.
Class: |
42/70.07;
42/42.01 |
Current CPC
Class: |
F41A
19/21 (20130101); F41A 17/02 (20130101) |
Current International
Class: |
F41A
17/00 (20060101); F41A 19/00 (20060101); F41A
17/02 (20060101); F41A 19/21 (20060101); F41c
027/10 (); F41c 019/00 () |
Field of
Search: |
;42/1Y,42R |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Stahl; Robert F.
Assistant Examiner: Jordan; C. T.
Attorney, Agent or Firm: Woodhams, Blanchard and Flynn
Parent Case Text
This is a division, of application Ser. No. 308,250, filed Nov. 20,
1972, now abandoned.
Claims
I claim:
1. In a double-barrel gun having a pair of independently and
selectively actuated striker mechansims each having a striker
associated with a respective one of the barrels, each striker
associated with a respective one of the barrels, each striker
mechanism including a release element assessable from the underside
of the gun and arranged when released to actuate the associated
striker, and a single trigger mechanism for alternately actuating
said release elements by being movable laterally between the two
elements for individually and selectively actuating same,
comprising the improvement wherein:
said trigger mechanism includes a finger member adapted to be
engaged by the finger of a marksman and means mounting said finger
member on said gun for movement laterally thereof between first and
second operative positions permitting selective and independent
actuation of said strikers, said finger member also being
positionable in an inoperative position spaced from said first and
second positions, said finger member being incapable of activating
said release elements when in said inoperative position; and
releasable lock means mounted on said gun and coacting with said
trigger mechanism for locking said finger member in said
inoperative position.
2. A gun according to claim 1, wherein said lock means includes a
key-operated lock device mounted on said gun and coacting with said
trigger mechanism for permitting said finger member to be locked in
said inoperative position.
3. A gun according to claim 2, wherein said inoperative position is
located substantially centrally between said first and second
operative positions, and said release elements being laterally
spaced a sufficient distance so that activation of said finger
member when in said inoperative position results in an impact
portion thereof not engaging either of said release elements.
4. A gun according to claim 2, wherein the locking device comprises
a casing fixedly mounted on the gun and a key-operated locking
cylinder rotatably journalled in said casing and movable between a
released and a locked position, said locking cylinder when in said
locked position coacting with said trigger mechanism for fixedly
holding said finger member in said inoperative position.
5. A gun according to claim 1, wherein said trigger mechanism
includes a holder mounted on said gun for swinging movement about a
substantially vertical axis, said finger member being pivotally
mounted on said holder for swinging movement about a substantially
horizontal axis, whereby said holder is swingably moveable between
said first and second operative positions, and said lock means
coacting with said holder for selectively fixing same in said
inoperative position.
6. A gun according to claim 5, wherein said lock means comprises a
key-operated locking device having a key-operated locking member
rotatably supported on said gun and movable between a released
position and a locked position, said rotatable locking member when
in said locked position coacting with said holder for fixedly
maintaining same in said inoperative position.
7. A gun according to claim 6, wherein said inoperative position is
located centrally between said first and second operative
positions.
8. A gun according to claim 7, wherein said locking device includes
a casing fixedly secured to said gun and extending transversely of
said gun, said rotatable locking member being rotatably journalled
in said casing.
Description
The present invention relates to double-barrel guns or rifles,
particularly double-barrel shotguns, such as used in hunting and
relates more specifically to an improved firing mechanism for such
guns.
As is well known, the most usual type of hunting rifle is the
conventional hammerless double-barrel shotgun used with buck shot
ammunition. In the majority of cases, a separate trigger is
provided for each barrel of the gun, one trigger being located
slightly in front of the other. Thus, when firing two shots in
sequence, the finger of the marksman must be moved from one trigger
to the other, which implies a slight loss in time. The time lost in
moving the firing finger from one trigger to the other is
particularly accentuated in guns provided with so-called pistol
grips on the butt of the gun, i.e., a special arrangement provided
for guiding and supporting the hand of the marksman, since the
pistol grip presents an obstacle to the finger movement. To reduce
this loss in time, certain types of double-barrel shotguns have
been provided with a firing mechanism served by one single trigger
only, a re-setting means being arranged by means of which trigger
action can be directed from one barrel to the other. It is
doubtful, however, whether the time gained with this arrangement in
comparison with the arrangement of double triggers is sufficient to
render such arrangements fully satisfactory in the case of rapid
firing sequences.
The object of the invention is to provide a novel and improved
firing mechanism in double-barrel shotguns which enables both
barrels of the gun to be discharged, one after the other, in the
fastest possible sequence, by means of a single trigger. A further
object of the invention is to provide a simple, extra safety device
against unintentional firing of the gun, in addition to the
conventional safety device of the gun. A further object of the
invention is to provide the gun with a key-operated lock, which
renders it impossible to fire the gun until the lock is
released.
These and other objects are obtained and the aforementined
disadvantages are eliminated with the firing mechanism of the
present invention.
The invention will now be described in more detail with reference
to a number of embodiments thereof illustrated in the accompanying
drawings in which
FIG. 1 is a side view of the central portion of a conventional
double-barrel shotgun provided with a firing mechanism constructed
in accordance with the invention.
FIG. 2 illustrates the same portion seen from the plane marked with
the line II--II in FIG. 1, partly in section.
FIGS. 3 and 4 are detail sectional views taken through the lines
III--III and IV--IV respectively in FIG. 1.
FIG. 5 is a view corresponding to the view in FIG. 1 but in smaller
scale and illustrating a second embodiment of the firing mechansm
according to the invention.
FIG. 6 illustrates the portion of the gun illustrated in FIG. 5,
seen from the plane marked with the line VI--VI in said figure,
partly in section.
FIG. 7 is a detail view, partly in section, of a modified
embodiment of the firing mechanism according to the invention, with
certain external portions of the mechanism removed to illustrate
the construction of the mechanism more clearly.
FIG. 8 is a detail section view taken along line VIII--VIII in FIG.
7, and FIG. 9 is a detail sectional view taken along the line
IX--IX in FIG. 7.
For the sake of clarity, FIGS. 7-9 are drawn in larger scale than
FIGS. 5 and 6.
FIG. 1 illustrates diagrammatically and in side view the central
portion of a hammerless double-barrel shotgun 10 in which the
firing mechanism of the present invention is accommodated. With the
exception of the firing mechanism according to the invention, the
weapon is of conventional design and comprises two barrels 12 and
14 so arranged in relation to the wooden stock 15 of the gun
enclosing the gun opening and firing mechanism so as to be capable
of being broken open. The barrels are locked in position relative
to the stock by means of a catch 16 which is operated in a known
manner externally of the gun, and behind which a safety catch 18 of
known construction is arranged. The stock 15 merges rearwardly into
the gun butt, which is not disclosed in detail. A trigger 20
constructed in accordance with the invention and enclosed by a
cover plate 24 attached to a trigger guard 22 is arranged on the
under surface of the stock.
As previously mentioned the trigger mechanism is of the
conventional hammerless type and will not be described in detail,
since it does not form part of the present invention. Arranged in
the cover plate 24 (FIG. 2) are two grooves 26a and 26b, and in the
conventional trigger system there extends through said grooves two
operating tongues journalled inwardly of the cover plate 24 and
each connected with its respective trigger, the triggers being
located in side by side relationship but one slightly behind the
other. According to the present invention, however, the tongues are
not connected with any external triggers, but are reduced to two
outwardly projecting tongues 28a and 28b. The tongues merge with
conventionally constructed elements located inwardly of the cover
plate and connected with and journalled in the firing mechanism in
a manner such that when either tongue 28a or 28b is pressed into
its groove, i.e. upwardly as seen in FIG. 1, the associated portion
of the mechanism is released and the barrel located on that side of
the gun is fired.
The essence of the invention resides in the fact that one single
trigger 20 is used to activate both of the firing tongues 28a and
28b, it being ensured that only one of the tongues can possibly be
actuated at any one time by means of the trigger. The trigger 20
comprises mainly a suitably curved bar, attached at its forward end
to the cover plate 24 adjacent the front attachment point of the
trigger guard 22, the trigger being shaped so as to conform to the
index finger of the marksman, to facilitate gripping of the
trigger.
In accordance with the invention, the trigger 20 is mounted so that
in addition to being pivotally movable in the normal manner around
the axis marked with X--X in FIG. 2, it can also be pivotally moved
horizontally around an axis marked Y--Y in FIG. 1. It will readily
be perceived, that the illustrated movement pattern of the trigger
can be obtained in a variety of ways, and FIGS. 1-4 illustrate a
first proposal for obtaining such a movement pattern, which implies
that the trigger is joined with a vertical post or transfer member
30, which is pivotally joined to an attachment pin 32. The pin can,
in turn, be pivotally mounted to the cover plate 24 or, as is more
simple, the post 30, which joins the actual trigger 20 with the
attachment pin 32, may be resiliently sprung to an extent whereby
it permits the trigger to be swung laterally to the desired degree.
Further, the portion of the trigger adjacent the point where the
trigger is joined to the gun may be made of a resilient material
which permits movement of the trigger around said axes.
Attached to the upper surface of the trigger 20 is a shoulder 34
arranged to alternately actuate either one of the firing tongues
28a and 28b, depending on whether the trigger is moved to the left
or the right, as shown by the arrows in FIGS. 3 and 4. Thus, the
trigger 20 and the post 30 and attachment pin 32 may be adjusted so
as to normally take the position illustrated in the last mentioned
Figures, i.e. with the shoulder 34 located opposite the firing
tongue 28b, i.e. in a position ready for firing the right-hand
barrel of the gun. The trigger is also suitably spring-biased
towards its neutral or rest position in a manner not shown, so that
a small spring pressure must be overcome when firing in order to
move the shoulder 34 to the selected firing tongue 28a or 28b. As
previously mentioned, the manner in which the trigger 20 is mounted
is only diagrammatically illustrated, and a large number of
structural embodiments are possible. One such alternative
embodiment requiring the trigger to be sprung in its entirety, so
that all movements of the trigger necessary for firing the gun must
be effected against the action of a small spring pressure.
It will be perceived that an important condition for the
operational safety of the trigger thus described is that the
shoulder 34 can not be brought unintentionally to actuate both the
firing tongues 28a and 28b at the same time. That this can not take
place is ensured by means of the present invention, owing to the
fact that the trigger 20 is provided with a guide post 36,
preferably mounted slightly behind the shoulder 34, when seen in
the firing direction, and arranged to co-act with a small guide
prism 38 mounted on the cover plate 24, the guide prism 38 being
provided with a pointed top portion, as illustrated in FIG. 4. When
firing the gun, the guide post 36 is able to engage the prism 38 on
one side or the other of the top portion thereof, wherewith a
camming effect is obtained with the interaction of the two members,
so that the shoulder 34 is forced to engage one of the tongues 28a,
28b, and with which it is impossible to obtain simultaneous firing
engagement with said two elements.
As will be described hereinafter, to aforementioned guide post and
prism can be constructed in a manner such that in addition to
preventing both barrels of the gun being discharged simultaneously,
they also provide an additional safety mechanism against firing of
the gun in general. Moreover, a key-operated lock can be embodied
so as to secure the trigger in its safety position. An embodiment
of the invention including such means will now be described with
reference to FIGS. 5-9.
The double-barrel shotgun 10' illustrated in FIG. 5 is
substantially the same as the shotgun 10 previously described, and
thus has two barrels 12 and 14 which are mounted in a wooden stock
15 in a manner to permit the gun to be broken in the normal way,
and which are capable of being latched in position relative to the
stock by means of a catch 16 located in front of the conventional
safety device 18 of the gun. With the illustrated embodiment of
FIGS. 5-9, there is arranged on the lower surface of the stock a
modified trigger 50 enclosed by a trigger guard 52 attached to a
cover plate 54. The cover plate is provided with two grooves 56a
and 56b through which extend two inwardly mounted operating
tongues, the ends of which are provided with two outwardly
projecting noses 58a and 58b. As with the aforedescribed
embodiment, the noses 58a and 58b co-act with the inner parts of
the firing mechanism, which is of conventional design in other
respects, so that when either of the noses 58a or 58b are pressed
in their respective grooves, i.e. upwardly in FIG. 9 the associated
portion of the mechanism is released and the barrel located on that
side of the gun is discharged.
As with the aforedescribed embodiment of the invention, both
barrels of the gun are discharged by means of one single trigger
50, which can be caused to alternately actuate the two firing noses
58a and 58b of the operating tongues, wherewith it is ensured that
only one of the noses can be activated at any one time.
The trigger 50 comprises a finger bar 60 mounted at the upper end,
the forward end thereof mounted on a pin 62 arranged in a pivotable
leverlike housing 64. The housing 64 mainly comprises two parallel,
vertically extending side pieces 66a and 66b, which are joined to
the rear thereof with a common web member 70. The web member is
provided at the rear end thereof with a small vertically extending
journal sleeve 72 mounted on a bearing pin 74 securely attached to
the cover plate 54. As evident from FIG. 7, the finger bar 60 is
provided with a back portion 76, which is provided at the top
thereof, slightly behind the journalling point of the finger bar at
62, with an abutment 78. A light spring 80 is inserted between
guide shoulders on the back portion 76 and on the front end of the
web member 70 of the housing 64 as illustrated in FIG. 7. Thus, the
finger bar 60 is held by the spring 80 yieldingly in its normal
position, illustrated in FIGS. 5 and 7, and can be swung
counter-clockwise by the finger of the marksman, as shown in FIG.
7, against the action of the spring. Extending between the rear
portion of the trigger guard 52 and the cover plate 54 are two side
walls 75a and 75b, which together with the trigger guard and the
cover plate form a housing which accommodates the rear portion of
the trigger 50, i.e. the web member 70.
Thus, in its entirety the moveable trigger 50 comprises the finger
bar 60 which is actuated directly by the finger of the marksman and
which is journalled at 62 in the housing 64 (the journal axis being
shown with X--X in FIG. 8), which in turn is pivotally mounted at
74 at the rear end thereof around a substantially vertical axis
(marked with y--y in FIG. 7) relative to the stationary housing 75.
It will readily be perceived that when actuated by the finger of
the marksman, the trigger in its entirety can be swung around the
axis y--y from side to side, as illustrated with arrows in FIGS. 8
and 9. The trigger can hence be moved selectively to positions such
that the abutment 78 on the back portion 76 of the finger bar is
located opposite either one of the outwardly projecting noses 58a
or 58b. Thus, when the finger bar 60 is swung counter-clockwise, as
viewed in FIG. 5, and, as happens when firing the gun, the nose 58a
or 58b located opposite the abutment 78 on the back portion 76 of
the finger bar is pressed in, and the associated barrel is
discharged. The other barrel can then be immediately discharged by
moving the trigger in its entirety, i.e. the finger bar 60 together
with the housing 64, and bringing the abutment 78 to actuate the
corresponding nose 58a or 58b cooperating with the firing mechanism
of said other barrel.
As illustrated in FIGS. 6 and 9, a stationary shoulder 57 is
mounted on the cover plate 54 between the movable noses 58a and 58b
forming part of the inner firing mechanism. As will be particularly
clear from FIG. 9, the abutment 78 on the finger bar 60 must
therefore pass the intermediate shoulder 57 when moving from one
firing position to the other, and the two noses 58a and 58b can
thus not be actuated at one and the same time. Further, as
mentioned in the aforegoing, the gun can also be provided with a
safety device additional to the conventional safety device actuated
by the safety catch 18, as described hereinafter.
As illustrated in FIG. 9, the vertical side pieces 66a and 66b of
the housing 64 are curved outwardly at the top thereof to form
shield portions 68a and 68b respectively of L-shaped profile, to
form a small chamber which accomodates and protects the abutments
57 and 58.
Different rest or neutral positions can be arranged as desired for
movement of the trigger 50 in the horizontal plane, i.e. about the
axis y--y. FIG. 8 illustrates diagrammatically an embodiment in
which the trigger is yieldingly held in an outer position by means
of a small guide spring 82 arranged on one side of the web member
70, the spring urging the web member, and thus also the trigger in
its entirety, towards a shoulder 84a mounted on the opposite side
of the web member. In this way, the trigger is normally held in a
rest position, in which it is able to fire one barrel without being
moved laterally, in the illustrated case the left barrel, and with
which in order to fire the right barrel, the trigger must be moved
in its entirety to the right side. The arrangement with the guide
spring 82 and the shoulder 84a may, of course, be reversed, so that
instead the trigger is arranged, if so desired, to be located in
its rest position ready for firing the right barrel. In accordance
with one important feature of the invention, however, the rest or
neutral position of the trigger may be selected so that the trigger
lies centrally of the two firing positions, i.e. so that the
abutment portion 78 of the trigger is located opposite the
stationary shoulder 57. Thus in order to fire the gun, the trigger
must be moved intentionally to one side or the other, wherewith the
neutral position of the trigger implies a safety position, in which
actuation of the finger bar 60 will only cause abutment portion 78
of the trigger to strike the stationary shoulder 57. In this way
there is obtained an additional safety means against unintentional
firing, should the conventional safety catch 18 be unintentionally
left inoperative. This additional safety device is of so much more
value since it is always operative and automatically operates as
soon as the trigger is released.
As aforementioned, the trigger of the present invention can be
locked in its safety position by means of a key, and to this end
the illustrated embodiment is provided with a cylinder type locking
means 90, which comprises in a known manner a locking cylinder 86
journalled in a small casing 88 mounted transversely in relation to
the trigger guard 52 between the side walls 75a and 75b of the
trigger housing 75, as shown in FIGS. 5, 7, 8 and 9. The locking
cylinder 86 is provided in a conventional manner with a number of
locking pegs (not shown) capable of being actuated by a key, the
bit of which is passed through a key groove 92 in the cylinder. A
centre portion of the cylinder is free from locking pegs, and is
instead provided with two peripherally extending recesses, mutually
at substantially right angles to each other, one of said recesses,
94, being broader than the other, 96, wherewith as illustrated in
FIGS. 7-9, either the broad or the narrow recess can be turned
upwardly by rotating the cylinder with the key. Hence, a lower
portion 71 of the web member 70 on the trigger housing 64
constantly extends into the upwardly turned recess and if, as
illustrated in FIG. 9, the portion 71 projects into the broader
recess 94, the trigger is free to swing to the maximum extent
laterally between the firing positions. On the other hand, when the
cylinder is turned through 90.degree. clockwise, as seen in FIG. 7,
the narrow recess 96 faces upwardly and engages the portion 71 in
its centre position, in which the trigger abutment 78 will strike
the stationary safety shoulder 57 when an attempt is made to fire
the gun. Thus, in this particular instance it is impossible to fire
the gun unless the lock cylinder is first rotated with the key. It
will be obvious herefrom, that this arrangement affords a valuable
safety measure against unauthorized use of the gun.
The invention is not restricted to the illustrated embodiments, but
can be modified within the scope of the following claims. Thus, the
trigger housing or holder 64 pivotally arranged around the vertical
axis y--y can, instead, by constructed for movement laterally by
means of a system of parallel links, such that the trigger is able
to move in a parallel movement pattern without being turned in the
horizontal plane. Further, the key-operated lock has been described
by way of example only, and alternative constructions for fixing
the movable trigger in its neutral or safety position lie within
the scope of all skilled in the art.
* * * * *