U.S. patent number 3,601,918 [Application Number 05/004,899] was granted by the patent office on 1971-08-31 for firing pin safety mechanism.
This patent grant is currently assigned to Carl Walther Sportwaffenfabrik. Invention is credited to Dieter Keppeler.
United States Patent |
3,601,918 |
Keppeler |
August 31, 1971 |
FIRING PIN SAFETY MECHANISM
Abstract
A firing pin having a transverse groove is secured in a locked
position by a spring-loaded thrust member moveable transversely to
the firing pin through the groove. The thrust member is also
provided with a transverse groove through which the firing pin
moves when disengaged. An inclined surface on the thrust member
adjacent the groove cams against an inclined surface on a rear edge
of the firing pin groove to move the firing pin rearwardly and
secure the firing pin against movement. The thrust member is
actuated by a locking slide slideably mounted on the exterior of
the firearm.
Inventors: |
Keppeler; Dieter (Ulm Donau,
DT) |
Assignee: |
Carl Walther Sportwaffenfabrik
(N/A)
|
Family
ID: |
21713077 |
Appl.
No.: |
05/004,899 |
Filed: |
January 22, 1970 |
Current U.S.
Class: |
42/70.08 |
Current CPC
Class: |
F41A
17/64 (20130101) |
Current International
Class: |
F41A
17/64 (20060101); F41A 17/00 (20060101); F41c
017/04 () |
Field of
Search: |
;42/7F,7R,69A,69B |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Borchelt; Benjamin A.
Assistant Examiner: Jordan; C. T.
Claims
What is claimed is:
1. A firing pin safety mechanism for firearms comprising a firing
pin mounted for longitudinal movement within the firearm and having
a transverse groove therethrough, a rear edge of the groove having
an inclined surface, a spring-loaded thrust member moveable
transversely to said firing pin through said firing pin groove,
said thrust member having a transverse groove therein to receive
said firing pin, an inclined surface on said thrust member adjacent
its groove engageable with said firing pin inclined surface, the
spring-loaded thrust member being urged into the position wherein
said grooves are aligned and said firing pin is free to move, and
means operable exteriorly of the firearm for moving said
spring-loaded thrust member to engage said inclined surfaces to cam
the firing pin rearwardly so that the firing pin is secured against
movement.
2. A firing pin safety mechanism as claimed in claim 1 and
comprising means engageable with said thrust member for locking
said thrust member in the position securing said firing pin against
movement.
3. A firing pin safety mechanism as claimed in claim 1 wherein said
thrust member has a pair of intersecting sloping surfaces on an end
thereof, said thrust member moving means comprising a slideable
shaft transverse to said firing pin and moveable parallel thereto,
a roller on one end of the thrust member moving means engageable
with said thrust member sloping surfaces, the movement of said
moving means moving said roller upon said sloping surfaces to move
the thrust member into the secured and disengaged positions.
4. A firing pin safety mechanism as claimed in claim 3 and
comprising a locking slide connected to said moving means shaft and
slideable on the exterior of the firearm.
5. A firing pin safety mechanism as claimed in claim 4 and
comprising a cylindrical pin fixed within the firearm and passing
through a transverse opening in said moving means shaft to define a
first slide guide, and second slide guide means on the exterior of
the firearm slideably supporting said locking slide thereon.
Description
The present invention relates to a safety mechanism for firearms,
more particularly, to a firing pin safety mechanism.
A commonly known form of safety mechanism for firing pins comprises
a pivotable operating lever actuated from the exterior of the
firearm and connected to a shaft having a locking surface which
projects into the path of the firing pin, when in the locked
position, to secure the firing pin against movement and prevent the
firing pin from contacting the cartridge percussion cap.
Another known form of a safety mechanism for a firing pin comprises
a horizontally positioned shaft in the forward position of the
firearm and having a safety or operating handle projecting
laterally outwardly of the firearm. In the disengaged position of
the safety mechanism, the outer end of the handle acts upon a
ratchet lever movable transversely with respect to the axis of the
firing pin and the trigger. A leaf spring usually acts against the
ratchet lever and the handle acts against the force exerted by this
leaf spring. When the safety handle is moved to the locking
position the ratchet lever is actuated to position a shoulder in
front of a lug on the trigger so that the trigger is secured
against movement.
Through experience it has been found that such safety mechanisms
having rotating or pivoting levers are disadvantageous since the
operation of the external handle becomes awkward when a telescopic
sight is mounted upon the firearm. The presence of the operating
handle as described above actually prevents mounting of a
telescopic sight in a position flat upon the firearm. It is
therefore the principle object of the present invention to provide
a novel and improved firing pin safety mechanism for firearms.
It is another object of the present invention to provide a firing
pin safety mechanism actuated by an external slide mounted on the
outer surface of the firearm.
It is an additional object of the present invention to provide a
firing pin safety mechanism having an operating handle which
occupies a minimum of space and is positioned to provide a minimum
of interference with attachments to the firearm.
According to one aspect of the present invention a firing pin
safety mechanism for firearms may comprise a firing pin mounted for
longitudinal movement within the firearm and being provided with a
transverse groove. A rear edge of the firing pin groove has an
inclined surface. A spring-loaded thrust member is moveable
transversely to the firing pin through the firing pin groove. The
thrust member also has a transverse groove through which the firing
pin moves when the safety mechanism is disengaged. An inclined
surface is on the thrust member adjacent its groove so as to be
engageable with the firing pin inclined surface. The thrust member
is urged by a spring into the disengaged position where the grooves
are aligned and the firing pin is free to move. Means operable
exteriorly of the firearm are provided for moving the thrust member
against the action of its spring so that the inclined surfaces are
brought into engagement whereby the firing pin is cammed rearwardly
and secured against movement.
Other objects and advantages of the present invention will be
apparent upon reference to the accompanying description when taken
in conjunction with the following drawings, which are exemplary,
wherein;
FIG. 1 is a perspective view of the firing pin safety mechanism
according to the present invention in the disengaged position with
a portion of the breech being cut away for purposes of clarity;
and
FIG. 2 is a perspective view similar to that of FIG. 1 and showing
the cocked firing pin secured in the locked position.
Proceeding next to the drawings wherein like reference symbols
indicate the same parts throughout the various views a specific
embodiment of the present invention will be described in
detail.
As may be seen in FIGS. 1 and 2 the central portion of a breech
member 1 has a locking slide 2 positioned laterally outwardly
thereof and slideable on the exterior surface. The slide is
displaceable in a longitudinal direction as indicated by the
double-ended arrow and parallel with a firing pin 3 also moveably
mounted within the breech member. The locking slide is positioned
upon a slide guide 4 on the exterior face of the breech member
arranged outwardly of a recess 5 within the breech member. A
longitudinal shaft 6 extends from the locking slide 2 into the
recess 5 and is securely attached to the locking slide so as to be
moveable therewith. A bore 7 extends through the breech member and
has a cylindrical pin 8 seated therein which passes through the
recess 5 and through a transverse opening formed in the shaft 6.
cam follower roller 9 is journaled at the end of the shaft 6 by a
pin 10. The roller 9 is constantly in engagement with a thrust
member 11 urged outwardly against the roller 9 by means of a
compression spring 14. The thrust member 11 is formed with two
intersecting inclined surfaces 12 and 13 upon which the roller 9
bears. The roller 9 slides along the inclined surfaces 12 and 13 in
response to the linear displacement of the locking slide 2 to which
the roller is attached by means of the shaft 6. The inclined
surfaces are constantly urged outwardly into contact with the
roller 9 by means of the spring 14.
The thrust member 11 is positioned transversely to the firing pin 3
and is guided for lateral displacement within the recess 5. The
shaft portion of the thrust member is provided with a transverse
guide groove 15 through which the firing pin passes when the safety
mechanism is in the disengaged position. An inclined surface 16 is
also provided on the shaft adjacent the guide groove 15.
In a similar manner the lower edge of the firing pin 3 is provided
with a transverse groove through which the shaft portion of the
thrust member passes. A rear edge of the groove is provided with an
inclined surface 17 which is engageable with the thrust member
inclined surface 16 when the safety mechanism is moved to the
locking or secured position.
The construction as described above employing the roller 9 moveable
against inclined surfaces 12 and 13 together with a double slide
guide structure comprised of the cylindrical pin 8 and the slide
guide 4 considerably facilitates manipulation of the locking slide
2 by the person handling the firearm.
As may be seen in FIG. 2 the firearm is prepared for firing by
pivoting a bolt handle 18 acted upon by a bolt compression spring
19 in a manner known in the art. The firing pin 3 now extends
forwardly toward the direction of a cartridge in the breech. Should
it be desired to lock the safety mechanism when the firearm is in
the firing condition the locking slide 4 is moved rearwardly by the
firer's thumb in the direction of the arrow shown in FIG. 2. The
roller 9 will then move along inclined surface 12 to push the
thrust member 11 toward the firing pin 3 a sufficient distance so
that the inclined surface 16 of the thrust member cams against the
inclined surface 17 of the firing pin to move the firing pin
rearwardly and arrest the firing pin against further movement.
.During this procedure the roller 9 will leave the inclined surface
12 to engage the inclined surface 13. The roller 9 will be
maintained in engagement with the inclined surface 13 by the force
of compression spring 14 and the firing pin will be secured and
locked against movement as long as the locking slide 2 is retained
in this position.
When it is desired to disengage the safety mechanism the locking
slide 2 is moved by the thumb of the firer toward the right as
viewed in FIG. 2. The roller 9 will then leave the inclined surface
13 and slide along the inclined surface 12. As the roller 9 rides
along the inclined surface 12 the compression spring 14 will
progressively urge the thrust member 11 outwardly so that the
thrust member inclined surface 16 disengages from the firing pin
inclined surface 17 and the firing pin 3 is free to move through
the thrust member groove 15. With the firing pin in the unsecured
or disengaged position the trigger can now be operated and the
firing pin will move forwardly in response to the operation of the
trigger to impact against the cartridge and cause a shot to be
fired.
Thus it can be seen that the present invention has disclosed a
simple but highly reliable safety mechanism for the firing pin of a
firearm. Linear displacement of a locking slide mounted on the
exterior of the firearm will move a thrust member transversely with
respect to the firing pin to engage the firing pin and secure the
same against movement or to disengage the firing pin so that the
firing pin is free to move in response to the operation of the
trigger. The disclosed safety mechanism avoids any rotating or
pivoting elements and the locking slide is compact so as to occupy
a minimum of space and to cause no interference with the operation
of the firearm.
It is understood that this invention is susceptible to
modifications in order to adapt it to different usages and
conditions and, accordingly, it is desired to comprehend such
modifications within the invention as may fall within the scope of
the appended claims.
* * * * *