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Патент USA US2132490

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2,132,490
H. F. MOSSBERG
SIGHT FOR FIREARMS
Filed Dec. 15, 1937
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INVENTÓR
' Hâwldlîlvlassberg.
BY
MÃ ¿ívvu/z/nía
_
ATTORNEY
33’. GEOMETWCÀL IP-ESTRUMENT‘B.
Patented Oct. 11, 1938
2,132,490
UNITED STATES PATENT OFFICE
2,132,490
SIGHT FOR FIREARMS
Harold F. Mossberg, New Haven, Conn., assigner
to O. F. Mossberg & Sons, Inc., New Haven,
Conn., a corporation of Connecticut
Application December 13, 1937, Serial No. 179,425
15 Claims. (C1. 33-56)
This invention relates to improvements in
Figure 5 is an enlarged cross-sectional view
sights for firearms and more particularly to an
adjustable sporting rear sight having elevation
and windage adjusting means in its structure.
It is particularly desirable that rear sights
for firearms be adjustable vertically and later
ally to respectively compensate for the distance
the target is away from the marksman, and for
the velocity of the wind at the location where
10 the firearm is in use. Devices by which such
adjustments are made should be of such con
struction that these adjustments may be deli
cately and accurately made to insure precision
in the operation of the firearm. Such adjust
15 ing devices should, therefore, be capable of being
operated to produce gradual, smooth and con
tinuous adjustments rather than adjustments
in steps, however ñne these steps may be.
One object of this invention is to provide an
20 improved sight for a firearm, particularly a rear
sight, whereby elevational and windage adjust
ments may be gradually and smoothly made.
Another object is to provide in a sight for a
ñrearm, a sight leaf and means to elevate one
25 end of the same in combination with means to
laterally move the elevated end. Still another
object is to provide in a sight of the above type
an improved form of manually operable sight
elevating mechanism.
30
A further object is to provide in a sight of the
above type a manually operable and novel form
of sight windage adjusting mechanism
A still further object is to provide an improved
sight for a firearm which is relatively inexpensive
35 to manufacture, simple in construction, compact,
ornamental in appearance, and very eflicient and
durable in use.
With the above and other objects in view,
which will appear as the description proceeds,
40 there has been illustrated in the accompanying
drawing one form in which the invention may be
embodied in practice.
In the drawing, wherein like reference char
acters designate like parts throughout the
45 several views:
Figure 1.is a sidey view of a ñrearm, or gun,
having a rear sight embodying the features and
principles of this invention associated there
50 with;
Figure 2 is a side view of the sight shown in
Figure 1;
Figure 3 is a top plan View of the same;
Figure 4 is an enlarged sectional View taken
.55 on line 4-4 of Figure 3;
taken on line 5-5 of Figure 3;
Figure 6 is an enlarged rear end view of the
sight; and
Figure 7 is a greatly enlarged cross-sectional
View taken on line 'I-l of Figure 3.
The sight selected to illustrate this invention
is of the type generally known as a sporting rear
sight and is mounted upon the barrel || of the
firearm, or gun, I2 just forward of the receiver 10
I3. The sight is secured to the barrel II by a
screw I4 which passes through the front end I5
of a sight leaf I6 and the end |'| of a base plate
I8, and is threaded into the barrel I I. The base
plate I8 is preferably formed of spring metal and
is provided with a curved section I9 at its rear
end 2| and a curved section 22 at its front end
I1, the curvature of the sections I9 and 22 being
substantially equal to that of the barrel II at
the respective positions so as to firmly seat
thereon. The base I8 is slightly bowed upwardly 20
between its ends whereby the curved sections I9
and 22 will be tightly pressed against the barrel
II and rigidly held in place when the screw I4
is tightened.
The screw I4, where it passes through the sight 25
leaf I6, is enlarged in diameter, as at 23, to fit
an opening 24 in the leaf I6, the opening 24
being elongated cross-wise of the leaf I6 to per
mit lateral swinging movement of the same rela
tively to the base I8 upon a pivot pin, or rivet, 30
25 which is provided to secure the leaf I6 to the
base I8 and which is disposed intermediate the
ends of these parts. 'I‘he length of the enlarged
portion 23 of the screw I4 is slightly more than
the thickness of the leaf I6 to permit the leaf to 35
swing relatively to the base I8. The portion 23
forms a shoulder 26 and the base I8 is clamped
between this shoulder 26 and the barrel II when
the screw I4 is tightened.
The base plate I8 is provided at its rear end 40
with ñanges 28 and 29, which extend upwardly
from the base, one on each side thereof and
straddle the rear end 3| of the leaf I6. The leaf
I6 at its rear end 3| is somewhat narrower than
the distance between the ñanges 28 and 29 to 45
allow for lateral swinging movement of the leaf
I6, the flanges 28 and 29 acting respectively as
stops to limit such lateral swinging movement.
A portion 32 of the leaf I6 at its end 3| is bent 50
at an angle from the remainder and extends
upwardly to the rear of the flanges 28 and 29.
The portion 32 has a sight notch 33 formed in
its upper edge for the usual sighting purposes.
The leaf I 6 is also preferably formed of spring
2
2,132,490
metal and is tensioned to constantly be biased
downwardly at its rear end 3|.
The means provided to laterally swing the
sight leaf I6 for windage adjustment of the sight
notch 33 and upon the rivet 25 includes a thumb
screw 34 having knurled head 35 and a threaded
body portion 36. The screw 34 is provided with
trunnions 31 and 38, one at each end of the
body portion 36, which are journaled in loops 39
10 and 4I respectively, which are formed in the
leaf I6 and dispose-d intermediate the screw I4
and rivet 25. An opening 42 is formed in the
leaf I6 between the loops 39 and 4I when they
are formed, to provide room between the loops
15 for the threaded body portion 36, the respective
ends of which abut the opposing side edges of
the loops 39 and 4I. Thread-like ribs 43, corre
sponding in form and pitch to the threads on
the body portion 36 of the screw 34, are formed
20 beneath the portion 36 in the upper surface of
the base I8. The threads on the portion 36 of
the screw 34 cooperate with these ribs 43 when
the leaf is ñrmly held down by the loops 39 and
4I when the screw I4 is tightened. By rotating
25 the screw 34, the leaf I6 may be swung on the
rivet 25 either to the right or left to laterally ad
just the sight notch 33 to compensate for wind
when sighting the firearm. The front end I5
of the leaf I6 may be pointed, as shown in Figure
30 3 to cooperate with short spaced apart lines 44,
35
40
45
50
provided on the end I1 of the base I8 to indicate
the extent of the adjustment being made.
The means for elevating, or lowering, the rear
end 3| containing the sight notch 33, includes a
threaded sleeve 45 having a knurled head 46.
The sleeve 45 is, in this instance provided with
the left hand screw threads upon its outer pe
riphery 41 and right hand screw threads upon
its inner periphery 48. The sleeve passes
through an opening 49 provided in the sight
leaf I6 and threadingly engages corresponding
left hand screw threads formed therein. A stud
5I, having a tongue 52 extending from its lower
end into a slot 53 formed in the base I8 and
having right hand threads upon its periphery
corresponding to those provided upon the inner
periphery 48 of the sleeve 45, is disposed within
the sleeve 45. When assembled together, as best
shown in Figures 4 and ’7, the rear end of the
leaf I6 due to its tension, whereby it is con
stantly biased downwardly, maintains the tongue
52 in the slot 53 to prevent the stud 5I from
turning. The slot 53 is formed somewhat longer
than the tongue 52 to permit lateral swinging
55 movement of the leaf I6 by the screw 34, see
Figure 7.
Rotation of the sleeve 45 by means of its
knurled head 46 in one direction will cause the
leaf I6, due to the cooperating threads between
60 them, to ride up the sleeve 45 into the elevated
position as shown by dotted lines at 54 in Figures
4 and 6. This movement may continue until
the leaf I6 strikes the underside of the head 46
whereupon the limit of adjustment upwardly is
65 reached. The head 46 while acting as a limiting
stop for the upward movement of the rear end
I5 of the leaf I6, also acts to prevent the stud
5I from coming entirely out of the sleeve 45,
the sleeve 45 during the aforesaid actuation rid
70 ing up the stud 5I due to the cooperating right
hand threads therebetween.
Reverse rotation of the sleeve 45 will cause
the leaf I6 to ride downwardly thereon into a
position as shown by the dotted lines 55 in Figure
75 4, and in full lines in Figure 6. In this instance
the stud 5I will ride upwardly into the sleeve 45
and, before the leaf I 6 entirely rides off the sleeve
45, the upper end of the stud 5I will strike
against the bottom 56 of the threaded opening
in the sleeve 45 and stop further rotation of the
sleeve 45 in this direction. From thev above it is
obvious, that there has been provided a sight
elevating means whereby the sight leaf I6 may
be delicately adjusted vertically by a gradual,
continuous and smooth movement and that this 10
means includes a limiting stop for such move
ment in each direction.
By selective rotation of the screw 34, the leaf
I6 may be adjusted to compensate for wind
either to the right, as shown by the dotted lines 15
51, or to the left, as shown by the dotted lines
58 in Figures 3 and 6. The combination of both
the elevating and windage adjusting means of
this invention in a sight for firearms permits of
rapid adjustments of the same for sighting pur 20
poses, both means being operable within their re
spective limits when either is in adjusted position
and without in any manner disturbing such- ad
justment.
While there has been illustrated and de 25
scribed above a specific form of sight embody
ing the features and principles of this invention,
it will be understood that the same may be em
bodied in other forms without departing from
the spirit or essential attributes thereof.
It is 30
therefore desired that the present embodiment be
considered in all respects as illustrative and not
restrictive, and it will be further understood that
each and every novel feature and combination
thereof present in, or possessed by, the device 35
herein disclosed, forms a part of the invention
included in this application.
What is claimed as new and for which it is
desired to secure Lettersv Patent, is:
1. The combination in a sight for a firearm, a 40
relatively narrow elongated base plate, a sight
leaf pivoted to said base plate intermediate their
ends, laterally spaced apart loops formed in said
leaf, thread-like ribs forme-d in the upper surface
of said base plate, a threaded member rotatably 45
mounted by and interposed between said loops in
engagement with said threads and operable to
swing said leaf relatively to said plate, a sleeve
threadedly passing through said leaf, a threaded
stud extending upwardly from said plate and 50
secured against rotation relatively thereto, said
sleeve and said stud having interengaging
threads, said sleeve being rotatable on said stud
to raise and lower said leaf relatively to said
plate.
55
2. An elevator screw for a sight having a base
plate member and a leaf member including an ex
ternally threaded and internally threaded sleeve
adapted to be screwed by means of its external
thread into a threaded opening in one of said 60
members, and a threaded stud adapted to be se
cured against rotation to the other of said mem
bers and screw into said sleeve by interengaging
with the internal thread thereof.
65
3. The combination in a sight having a leaf
member pivotally mounted to a base plate mem
ber to swing laterally relatively to each other,
one of said members having thread-like ribs
formed on its surface between said members, and 70
a windage screw having a threaded portion and a
trunnion portion adapted to be journaled in one
of said members, said threaded portion adapted
to interengage with the thread-like ribs formed
on the other of said members whereby rotation 75
E3, GEUt'ltlHlU/li 1Min Hut/1cm is.
'2,132,490
3
of said screw will swing one of said members
by said leaf at the other side of said pivoting
relatively to the other.
4. In a sight for firearms, a base plate, a leaf
plate secured to said base plate and adapted to
means to raise and lower said leaf relatively to
said plate, and means to secure adjacent ends
O1, have an end moved toward and away from said
base plate, means to so move said leaf plate in
cluding a threaded rotatable sleeve member hav
ing a threaded bore, the thread on said sleeve
member interengaging with a corresponding
thread formed in an opening in said leaf plate,
a threaded stud member secured against rotation
to and extending from said base plate into said
sleeve, the thread on said stud member inter
engaging with the thread in the bore of said
15 sleeve, the thread on one of said members being
left hand and the thread on the other member
being right hand.
5. In a sight for ñrearms, a base plate, a sight
leaf pivoted to said base plate for lateral swing
20 ing movement relatively thereto, a laterally dis
posed screw carried by said leaf and disposed be
tween said leaf and base plate and threadedly
engaging with said plate to swing the leaf rela
tively thereto, means to elevate one end of said
25 leaf relatively to said base plate including an ex
ternally and internally threaded sleeve threaded
into said leaf, and a stud interengaging with the
internal thread in said sleeve and being secured
against rotation to said base plate.
30
6. In a sight for firearms, a base plate, a sight
leaf pivoted to said base plate for lateral swing
ing movement relatively thereto, a laterally dis
posed screw carried by said leaf and disposed be
tween said leaf and said base plate and thread
35 edly engaging with said plate to swing the leaf
relatively thereto, means to elevate one end of
said leaf relatively to said base plate including an
externally and internally threaded sleeve thread
ed into said leaf, a stud having an external
40 thread thereon interengaging with the internal
thread in said sleeve, and cooperating means be
tween said stud and said plate to secure said
stud against rotation relatively thereto and to
permit swinging movement between said leaf and
said plate by said screw.
’7. In a sight for firearms, a relatively narrow
elongated base plate adapted to seat upon a part
of a firearm, a relatively narrow elongated sight
leaf overlying said base plate, means to pivotally
secure said leaf to said base plate for laterally
swinging movement relatively thereto, said leaf
extending beyond said pivot means at both sides
thereof, sighting means at one end of said leaf,
means passing through the other end of said
leaf and through said plate to secure said plate
to the firearm part, a laterally extending screw
disposed between said plate securing means and
said leaf pivoting means in position to engage
said plate to swing said leaf laterally on said
60 pivoting means, and threaded means disposed
adjacent said sighting means and carried by said
leaf to raise and lower said sighting means.
8. In a sight for firearms, a relatively narrow
elongated base plate adapted to seat upon a part
of a firearm, a relatively narrow elongated sight
leaf overlying said base plate, means disposed in
termediate the ends of said plate and leaf to
pivotally secure said leaf to said plate for swing
ing movement relatively thereto, said leaf ex
tending beyond said pivot means at both sides
thereof, sighting means at one end of said leaf,
a rotatable threaded member carried by said
leaf at one side of said pivoting means and en
of said leaf andsaid plate together and to said
firearm part.
9. In a sight for firearms, a leaf member hav
ing sighting means thereon, a base plate member
adapted to be mounted upon .a firearm, said mem
bers being pivotally secured together for lateral
swinging movement relatively to each other, a l0
threaded member journaled in and carried by said
leaf member, said threaded member being dis
posed between said leaf and plate members,
thread-like ribs formed on the surface of said
plate member adjacent said leaf member and 15
interengaging with said threaded member, where
by rotation of said threaded member will swing
said leaf member relatively to said plate member,
an externally and internally threaded sleeve
threadedly passing through said leaf member ad 20
jacent the sighting means thereon, and a thread
ed stud secured against rotation to said plate
member and extending therefrom into said sleeve
to interengage with the internal thread therein,
said external and internal threads of said sleeve 25
being, one left hand and the other right hand.
10. An elevator screw for a sight having a base
plate member and a leaf member including an
externally threaded and internally threaded
sleeve adapted to be screwed by means of its ex 30
ternal thread into a threaded opening formed in
one of said members, and a threaded stud adapt
ed to be secured against rotation to the other of
said members and to screw into said sleeve by
interengaging with the internal thread thereof, 35
the internal thread of said sleeve and the thread
on said stud being right hand threads and the
external thread on said sleeve being a left hand
thread.
11. In a sight for a ñrearm, a relatively narrow 40
elongated base plate, a relatively narrow elon
gated sight leaf pivoted to said base plate for
lateral swinging movement relatively thereto, and
means including a threaded member carried by
said sight leaf and disposed above said base plate
and threadingly engaging the upper surface of
said base plate to laterally swing said leaf rela
tively to said base plate.
12. In a sight for a firearm, a relatively nar
row elongated base plate, a relatively narrow 50
elongated sight leaf pivoted to said base plate for
lateral swinging movement relatively thereto,
means to pivotally secure said sight leaf to said
base plate, means including a threaded member
carried by said sight leaf at one side of said pivot 55
means and disposed above said base plate and
threadingly engaging the upper surface of said
base plate to laterally swing said leaf relatively
to said base plate, said sight leaf having a sight
ing end at the other side of said pivot means, and 60
means carried by said leaf and disposed adjacent
the sighting end thereof to elevate and lower said
sighting end and including a threaded member
rotatable on a vertical axis.
13. In a sight for a firearm, a relatively narrow 65
elongated base plate, a relatively narrow elon
gated sight leaf, a pivot pin whereby said leaf is
pivoted to said base plate intermediate their ends
for lateral swinging movement relatively thereto,
a first member rotatable on a horizontal axis and 70
carried by said sight leaf above said base plate
and co-operating with the upper surface of said
base plate, said sight leaf having a sighting end,
gaging said plate to swing said leaf relatively
a second member carried by said leaf and dis
75 thereto when rotated, threaded means carried
posed adjacent the sighting end thereof and be
75
4
2,132,490
ing rotatable on a vertical axis to elevate and
lower said sighting end, and a threaded member
disposed adjacent the end of said leaf opposite
the upper surface thereof, said member being op
erable to swing said leaf laterally relatively to
said plate when rotated.
to its sighting end to hold this leaf end down
wardly upon the adjacent portion of said base
15. In a sight, a relatively narrow elongated
'base plate, a relatively narrow elongated sight
leaf pivoted to said base plate intermediate their
lends, a sleeve threadedly passing through said
leaf, a threaded stud extending upwardly from
plate.
14. In a sight, a relatively narrow elongated
base plate, a relatively narrow elongated sight
leaf pivoted to said base plate intermediate their
ends for lateral swinging movement relatively
thereto, laterally spaced apart loops in said leaf,
said plate and being secured against rotation with
respect thereto, said sleeve and said stud having 10
interengaging threads, said sleeve being rotatable
threads formed in the upper surface of saidbase
ion said stud to raise and lower said leaf relatively
plate, and a threaded member rotatably mounted
to said plate.
by and interposed between said loops above said
15 base plate in engagement with said threads upon
HAROLD F. MOSSBERG.
15
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