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Патент USA US2108150

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GR
5R
291089160
Feb. 15, 1938.
c. G. SWEBILIUS
_
2,108,150
SIGHT FOR FIREARMS
Filed March 12, 1936
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Patented Feb. 15, 1938
2,108,150
UNITED STATES PATENT OFFICE
2,108,150
SIGHTTFOR FIREARMS
Carl G. Swebilius, New Haven, Conn.
Application March 12, 1936, Serial No. 68,438v
4 Claims. (Cl. 33-56)
This invention relates to sights for ?rearms into which the pointed edge of the plunger 20 is
and more especially to a sight for automatic
pistols.
An object of the invention is a ?rearm rear
sight which is easily and quickly adjustable both
for windage and for elevation.
According to the invention, the rear sight is
mounted on the ?rearm both for swinging move
ment longitudinally of the ?rearm and for bodily
10 movement transverse thereof. The sight is
locked in any desired position of adjustment by
two spring-pressed plungers and the pressure ap
plied to the plungers is regulated by adjustment
of a single screw.
To e?ect adjustment of the
15 sight, it is necessary merely to rotate the screw
to reduce the pressure applied to the plungers,
move the sight into its desired position of adjust
ment and then adjust the screw to restore the
required holding pressure on the plungers.
Other objects, novel features and advantages
20
of this invention will become apparent from the
following speci?cation and accompanying dra ing, wherein:
'
Fig. 1 is a side elevation of a pistol equipped
25
with a sight embodying the invention;
Fig. 2 is a plan View thereof;
Fig. 3 is an enlarged section on the line 3-—-3 of
Fig. 2, and
'
Fig. 4 is an enlarged section on the line 4-4
of Fig. 1.
The sight is herein disclosed as applied to an
automatic pistol It having a sliding breech bolt
ll. Near the rear end of the breech bolt is pro
vided a transverse groove l2 which is somewhat
more than semi-circular in cross-section. In this
groove is arranged a cylindrical head l3 from
which extends radially a plate l4 having a slot I5,
the head and plate together constituting the sight.
The sight is thus mounted on the breech bolt for
swinging movement longitudinally of the breech
bolt and for bodily movement transversely of the
breech bolt. A bore It extends longitudinally of
the breech bolt and traverses the groove l2. In
the front end of the bore I6 is arranged a plunger
l1 having a pointed end engageable with the
head l3. A spring l8 urges the plunger ll toward
the head l3 which is provided with a plurality of
grooves or serrations IQ for receiving the edge of
the plunger H. In the rear end of the bore 16
50 is provided a second plunger IS with a pointed
end engageable with the head l3. A spring 2|
interposed between the plunger 20 and a screw
22, threaded into the rear end of the bore I 6
urges the plunger l9 toward the head l3 which is
55 provided with transverse grooves or serrations 23
receivable.
The engagement of the edge of the plunger [1
with the serrations I 9 holds the sight in any
lateral position of adjustment while the engage
ment of the pointed edge of the plunger 20 in
the serrations 23 holds the sight in any position
of elevation adjustment. The pressure exerted
by the springs 18 and 2| is regulated by the screw
22 which can be screwed into the bore su?iciently 10
that the applied pressure holds the sight ?rmly in
any position of adjustment. In order to change
the adjustment of the sight the screw 22 is
screwed outwardly of the bore l6 until the pres
sure applied to the sight by the springs l8 and 15
2| is sui?ciently reduced to permit easy swinging
and/or lateral movement thereof. The sight is
then moved to the desired position of adjustment
and the screw 22 again screwed in to increase
the pressure applied to the head I 3 until the sight 20
is again locked in position.
Adjustment of the sight can easily and quickly
be effected. Adjustment for windage is made by
transverse movement of the sight while adjust
ment for elevation is made by swinging move
ment of the sight, as such swinging movement
changes the vertical position of the bottom of
the slot I5. The usual front side 24 is provided
at the front end of the barrel for cooperation
with the rear sight in the usual manner.
While the invention has been disclosed as ap
30
plied to an automatic pistol, it is to be understood
that the sight herein described may be used on
other types of ?rearms as desired. Furthermore,
it is to be understood that various modi?cations 35
may be made in the structure herein described
without in any way departing from the spirit of
the invention as de?ned in the appended claims.
I claim:
1. In a ?rearm, a sight having a cylindrical 40
head slidably and rotatably mounted in a groove
in the ?rearm, a pair of plungers in a bore
traversing said groove, said plungers being on
opposite sides of said head, a spring pressing each
plunger into engagement with said head, means 45
on said head whereby said plunger may look the
same in adjusted positions, and a screw threaded
into said bore for adjusting the pressure applied
by said springs to said plungers.
2. In a ?rearm, a sight having a cylindrical 50
head slidably and rotatably mounted in a groove
in the ?rearm, a pair of plungers in a bore
traversing said groove and said plungers being
on opposite sides of said head, means on said head
whereby said plungers may lock the same in ad 55
2
2,108,150
justed positions, a spring seated in said bore and
pressing one plunger into engagement with said
head, a second spring in said bore for pressing
the second plunger into engagement; with said
head and a screw threaded into said bore for
engagement with said second spring to vary the
pressure applied thereby.
-
3. In a ‘?rearm, a sight having a cylindrical
head received in a groove in the ?rearm, a pair
10 of plungers in a bore traversing said groove, said
plungers being on opposite sides of said head, a
spring pressing each plunger into engagement
of vertical serrations engageable by the other
plunger.
'
4. In a ?rearm, a sight having a cylindrical
head received in a groove in the ?rearm, a pair of
plungers in a bore traversing said groove and
said plungers being on opposite sides of said head,
a spring seated in said bore and pressing one
plunger into engagement with said head, a second
spring in said bore for pressing the second
plunger into engagement with said head, a screw
threaded into said bore for engagement with said
second spring to vary the pressure applied there
with said head, a screw threaded into said bore
to, said plungers having knife edge ends and said
for adjusting the pressure applied by said springs
head having a series of horizontal serrations en
15 to said plungers, said plungers having knife edge
ends and said head having a series of horizontal
serrations engageable by one plunger and a series
gageable by one plunger and a series of vertical 15
serrations engageable by the other plunger.
'
CARL G. SWEBILIUS.
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