U.S. patent number 3,840,995 [Application Number 05/332,124] was granted by the patent office on 1974-10-15 for detachable rear sight for shotguns having flat sided receivers.
Invention is credited to Albert J. Freiling.
United States Patent |
3,840,995 |
Freiling |
October 15, 1974 |
DETACHABLE REAR SIGHT FOR SHOTGUNS HAVING FLAT SIDED RECEIVERS
Abstract
A readily detachable rear sight for single-barrel shotguns with
flat-sided receivers includes a pair of resilient legs having flat
interior surfaces which engage respective receiver sides and
thereby prevent rotation of the sight. The sight is adapted to fit
the shotgun at the juncture between the receiver and the barrel and
includes, at its forward end, a resilient clip which engages the
barrel. In projecting over the barrel from the top of the receiver
the sight provides clearance for a barrel rib.
Inventors: |
Freiling; Albert J. (Wheaton,
MD) |
Family
ID: |
23296805 |
Appl.
No.: |
05/332,124 |
Filed: |
February 13, 1973 |
Current U.S.
Class: |
42/148;
42/111 |
Current CPC
Class: |
F41G
1/10 (20130101) |
Current International
Class: |
F41G
1/00 (20060101); F41G 1/10 (20060101); F41g
001/10 () |
Field of
Search: |
;33/233,261,242,243,244 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Martin, Jr.; William D.
Attorney, Agent or Firm: Rose & Edell
Claims
I claim:
1. A detachable rear sight for a single-barrel shotgun having a
flat-sided receiver joined at a junction to the curved single
barrel, said sight comprising: a generally U-shaped body member
arranged to snap-fit over the top of said shotgun at said junction
in inverted U position; said body member including a pair of
resilient sides arranged to extend downwardly along the sides of
said shotgun and a connecting piece joining said sides and arranged
to sit atop the shotgun; said resilient sides each having an
interior surface with a portion forward of said junction contoured
to resiliently engage said barrel between said sides, and a portion
rearward of said junction contiguous with said forward portion and
having a flat contour matched to the flat sides of said receiver;
the sides of said body member being slightly toed to permit
resilient engagement of said receiver between the rearward portions
of said sides; and said connecting piece having an outer surface
contoured to define a sighting notch.
2. The detachable rear sight according to claim 1 wherein said
rearward portion is substantially wider in a direction along the
shotgun length than said forward portion.
3. The detachable rear sight according to claim 2 wherein a portion
of said connecting piece adapted to be positioned over said barrel
is contoured to be spaced from said barrel to provide clearance of
a sighting rib located atop said barrel.
4. The detachable rear sight according to claim 1 molded as an
integral unit from plastic material.
Description
BACKGROUND OF THE INVENTION
The present invention relates to improvements in detachable shotgun
sights and, more particularly, to detachable rear sights for
single-barrel shotguns having flat-sided receivers.
Shotguns are generally manufactured without rear sights because
accurate sighting is not needed when conventional shot ammunition
is employed. However, shotgun owners often utilize rifled slugs or
similar ammunition which requires precision sighting. This would
occur, for example, in the many states in which high power rifles
are banned for purposes of hunting deer. It is therefore desirable
to provide a detachable rear aiming point or sight, which can be
aligned with the bead sight at the barrel of a shotgun muzzle, to
permit accurate sighting of a target. Clearly such a detachable
sight must be small to permit easy storage when not in use. In
addition it must be quickly attached to the shotgun without the
need for alignment adjustments. As a practical matter, the sight
must also be inexpensive and should fit a wide variety of shotgun
makes and models.
One prior art detachable sight may be either metal or plastic and
includes a pair of arcuate legs which resiliently engage the gun
barrel. The top of the sight is provided with a channel which
engages the rib extending along the top of many shotgun barrels.
The major disadvantage of this sight resides in the fact that it
derives its lateral or rotational stability and its alignment
accuracy from the rib-engaging channel. If the sight is employed
with a shotgun having no barrel rib, the sight is capable of
inadvertent rotation about the barrel. Moreover, absence of a
barrel rib requires that the sight be carefully aligned each time
it is attached to the gun.
It is therefore a primary object of the present invention to
provide a detachable rear shotgun sight which does not require a
barrel rib for proper positioning and for rotational stability.
It is another object of the present invention to provide an
inexpensive, readily detachable rear shotgun sight which accurately
and stably fits a wide variety of available shotguns.
SUMMARY OF THE INVENTION
I have noted that a rather large number of available single-barrel
shotguns have flat-sided receivers. Moreover, on most of those
shotguns having barrel ribs, the ribs extend no further above the
barrel than the upper surface of the receiver. I have therefore
provided a detachable rear sight which engages both the receiver
and the barrel at the juncture between the two in such a way as to
be unaffected by the presence of a barrel rib. The sight includes a
pair of slightly toed-in opposing legs having flat interior
surfaces which resiliently engage the flat-sided receiver
therebetween. The forward end of the sight slightly overlaps the
barrel and is in the form of a spring-clip having curved legs
adapted to resiliently fit around and engage the barrel. The
uppermost portion of the overlapping forward end of the sight
projects from the receiver over the top of the barrel, providing
clearance for a barrel rib.
The spring-clip provides secure attachment to the gun barrel. The
flat-surfaced legs, by virtue of their engagement with the flat
receiver sides, prevent rotation of the sight about the barrel and
assures accurate positioning immediately upon attachment.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and still further objects, features and advantages of the
present invention will become apparent upon consideration of the
following detailed description of one specific embodiment thereof,
especially when taken in conjunction with the accompanying
drawings, wherein:
FIG. 1 is a view in perspective of a shotgun, illustratinng the
manner in which the gun sight of the present invention attaches to
the shot gun;
FIG. 2 is an end view in plan of the gun sight of the present
invention; and
FIG. 3 is a side view in plan of the gun sight of the present
invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring specifically to FIG. 1 of the accompanying drawing, there
is illustrated a single barrel shotgun 10 of the type with which my
gun sight 20 is used. The shotgun 10 is a conventional,
commonly-sold shotgun and may be of the pump gun (as illustrated),
or semi-automatic, type. A barrel 11 projects forwardly from a
receiver 13 and may include a sighting rib 15 extending along the
length of the barrel. Sighting rib 15 is conventional and may be
hollow, solid or ventilated as is well known. Importantly for
purposes of the present invention, the vertical height of rib 15 is
no greater than the difference in height between barrel 11 and
receiver 13. More specifically, the forward end of receiver 13, at
which the rearward end of barrel 11 terminates, defines a shoulder
which extends vertically above the height of the barrel. The sight
of the present invention is intended for those shotguns either
having no rib or having ribs which extend no higher than the
aforementioned shoulder.
Receiver 13 is of the flat-sided type, meaning that its vertical
sides are straight rather than curved. This too is a requirement
for the shotguns with which gun sight 20 is to be utilized.
Referring to FIGS. 2 and 3, the rear gun sight 20 of the present
invention is preferably formed as a one-piece molded plastic unit
having sufficient resiliency and strength to serve the functions
described below. A typical suitable material is fiberglas
re-enforced nylon. Sight 20 includes a generally U-shaped body
member 21 which is inverted when in use so that its rear legs 23,
25 project generally downward from the generally arcuate connecting
portion 27. The actual sight is in the form of a semi-circular (or
similarly configured) notch 29 which is adapted to be aligned with
the usual bead sight (not illustrated) provided at the muzzle end
of most shotguns. Notch 29 is defined in a raised section 28
projecting upwardly from the outer surface of connecting section
27.
The inner surfaces 33, 35 of legs 23, 25, respectively, are flat
and toe-in (i.e. - converge) slightly toward one another. The
distance between inner surfaces 33 and 35 at their closest point is
slightly less than the width of standard flat-sided shotgun
receivers, such as receiver 13 in FIG. 1. Legs 23 and 25 are
sufficiently resilient to be spread apart as the sight is slid over
the top of receiver 13 (as illustrated in FIG. 1). The flat inner
surfaces 33, 35 then resiliently engage respective flat sides of
the receiver and assure proper positioning of body 21 and notch
29.
Legs 23, 25 extend in width from the rearward end to just short of
the forward end of body 21 where a spring clip is defined by a pair
of thin resilient forward legs 37, 39. Forward legs 37, 39 are
thinner, longer and closer together than legs 23 and 25 and are
adapted to resiliently engage barrel 11 as illustrated in FIG. 1.
By virtue of their greater length legs 37 and 39 extend further
around curved barrel 11 than legs 23 and 25 extend around
flat-sided receiver 13. Further, forward legs 37, 39 not only
toe-in slightly but are curved at their ends to assure some
engagement proximate the underportion of the barrel. Legs 37 and 39
are also resilient to permit them to be spread apart as they are
slid over the barrel.
As illustrated in FIG. 1, sight 20 is adapted to fit on shotgun 10
at the juncture between barrel 11 and receiver 13. Legs 23 and 25
engage the flat receiver sides and prevent inadvertent rotation of
the sight as well as assuring proper positioning of notch 29
relative to the bead sight at the muzzle end of the barrel. Forward
legs 37 and 39 provide firm engagement about barrel 11 and assure
that the sight is not lost due to inadvertent jostling of the
shotgun.
Due to its resiliency sight 20 is easily attached and detached from
a shotgun. Its relatively small size and one-piece configuration
permits it to be easily stored in a hunter's pocket when not in
use. The plastic material employed assures that the spring clip
formed by forward legs 37, 39 will not scratch the gun barrel or
injure the bluing.
The pump gun illustrated in FIG. 1 has its forearm wood 17
terminated well forward of receiver 13. In some semi-automatic
shotguns, however, the forearm wood extends back to just short of
the receiver near the centerline of the barrel. Sight 20 can be
employed with such a shotgun, without interferring with the
actuating mechanism beneath the barrel, because the spring clip
formed by relatively narrow legs 37, 39 fits in the small space
between the forearm wood and the receiver. The sight thus has
applicability to a wide variety of presently available shotguns of
the flat-sided receiver type.
At the forward end of the sight, arcuate section 27 joins spring
clip legs 37, 39 and projects forwardly over the gun barrel. The
inner wall of connecting section 27 is adapted to fit over the top
of receiver 13, so that the forward portion which extends over the
barrel is actually spaced from the barrel. This space provides
clearance for rib 15, regardless of the type of rib as long as it
does not extend higher above the barrel than the receiver. In most
available ribbed shotguns the rib does not extend above the
receiver. The sight is thus versatile in its applicability to
ribbed and non-ribbed shotguns. Moreover, the sight does not depend
on the presence of a rib for its alignment accuracy and positional
stability. Rather, these functions are provided by the flat
surfaces 33, 35 which engage the flat receiver sides to assure
proper alignment and stability. The slight toe-in or convergence
(approximately 5.degree.) of rear legs 23 and 25, combined with the
spring action of the forward legs 37 and 39, assure positive
clamping of the sight to both the receiver and the barrel; yet only
a small portion of the sight extends along the barrel.
While I have described and illustrated one specific embodiment of
my invention, it will be clear that variations of the details of
construction which are specifically illustrated and described may
be resorted to without departing from the true spirit and scope of
the invention as defined in the appended claims.
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