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Патент USA US2117634

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33-248 -
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OR
2 a 1 17 9 634
SR
GU
May 17, 1938. ‘
2,117,634
s. T. §M|TH
GUN SIGHT MOUNT
Filed April 21, 1936
2 Sheets-Sheet 1
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INVENTOR.
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ATTORNEY.
33. GEOMETRICAL INSTRUMENTS.
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May 17, 1933’
s. T.-SM|TH
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2,117,634
GUN SIGHT MOUNT
Fi',.ed April 21, 1936
'
2 Sheets-Sheet 2
INVENTOR.
Bycym :2v W
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ATTORNEY.
OEEHLN IRUUHB
33. litulvit I HIUAL INC) I HUWILN is.
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Patented May 17, 1938
’
' '
’
2,117,634
UNITED STATES PATENT OFFICE
2,117,634
GUN SIGHT MOUNT
Skardon T. Smith, Detroit; Mich.
Application April‘ 21, 1936, Serial No. 75,545
6 Claims.
The object of my invention is to produce a de
mount base for interchangeable sight units.
tion on any gun barrel or receiving case designed
Figs. 8, 9 and 10 illustrate a modi?ed form of
single mount base frames, and provided with
either single or double adjusting screw units.
units on a gun barrel or casing, and provided
with suitable means for making both elevation
and wind adjustments thereof, and in .' either
10 direction.
A further object is to produce. a special sight
mount for any gun, adaptable for receiving there
in interchangeable sight units, either of the tele
scope or ?xed frame type, and without disturbing
15 previously acquired adjustments for the respective
sights.
' -
A still further object is to produce a gun sight
mount provided with micrometer wind adjust
ment means so calibrated as to re-set the respec
Fig. 11 is a side view of a rigid peep sight unit
as may be substituted in the mount base in place
of the special telescope unit shown in Figs. 1 and
2, and is to be used with the double adjustment
mount base shown in the Fig. 7.
10
Fig. 12 shows a modi?ed end view of the sight
mounts 8 and 9.
In general, my device comprises a ?anged and
grooved base section suitable for ?xedly attach
ing to a gun barrel or receiving case, and pro
vided with two sight mount frames for chosen
sight units, adjustably mounted within the
?anged base grooves, and positioned in parallel
alignment with the axis of the supporting gun
15
tive sight unit for any chosen off-set by pre
barrel.
determined
micigijwpazgngs.
Another objec is to pro uce a gun sight mount
with suitable adjusting screws and micrometer
adjusting means designed for securing any de—
sired adjustment, either for elevation or for wind
adjustment, the said adjusting screws also pro
vide means for securely clamping the mounts 25
within the base grooves.
that is simple in construction, easily installed on
any type of gun, e?iciently operated and that
25
Fig. 7 shows a side view of a double adjustment
tachable gun sight mount adapted for installa
for retaining special sight units therein.
Another object is to produce a detachable gun
sight mount adapted for mounting telescope sight
20
(CI. 33—50)
can be manufactured at a very low cost.
These several objects are attained in the pre
ferred form by the construction and arrangement
of parts more fully hereinafter set forth.
Similar parts on all drawings are marked by
30 similar numerals or letters.
Fig. 1 is a side view of my detachable gun
mount attached to a gun barrel receiving case,
showing the general arrangement of assembled
parts and with a special telescope sight unit
mounted therein.
Fig. 2 is a top view of the sight mount and in
closed telescope unit and means for clamping
same tightly therein.
Fig. 3 is a vertical sectional view lengthwise of
40 the mounts, with the telescope sight unit indi
cated in dotted lines, taken on the line 3—-3 of
Fig. 2, showing the screw adjustment means and
mount attaching plate.
Fig. 4 is a cross-sectional view taken on the line
4-4 of Fig. 1, showing the relative position of the
various parts and the anchor means for retaining
the respective mounts in position.
Fig. 5 is another cross-sectional view taken on
the line 5—5 of Fig. 1 showing the adjustable
LO mount and means for both vertical and lateral
adjustment of the inclosed sight unit.
The base groove ?anges are provided 20
I will now describe more fully the detailed con
struction of my device, referring to the drawings
and the marks thereon.
The mount base may be made in either the
single or double type, also provided with either
single or double screw adjustment means. How
ever, the preferred structure is illustrated in Figs.
1 to 7 inclusively, and is confined to the double
base type which is more speci?cally described 35
herein, and with the remaining ?gures as modi?
cations thereof.
The double base I as illustrated in Figs. 1 to 7,
is preferably made of steel, machined and hard
ened, and comprises a side attaching plate a 40
formed with arm frames 17 across the top edge at
opposite plate ends positioned at one side of the
plate and approximately at right angles thereto.
The side plate a is preferablyslightly curved
and formed with a longitudinal relief slot 0 along 45
the inner surface lengthwise thereof, for securing
a more stable bearing against the supporting sur
face to which it may be attached. Screw holes d_
are provided through the side plate walls for
rigidly mounting the base I on the gun support 60
member.
The cross-arm frames b are formed
the line 4—4 of Fig. 1 showing the same mount
base but with an interchangeable ?xed sight unit
with triangular shaped slide grooves e positioned
therein in alignment with the gun barrel center
line, each arm being provided with a threaded
mounted therein.
screw hole I through the groove ' bottom wall 55
Fig. 6 is also a cross-sectional view as taken on
2
2,117,634.
positioned on the groove center line. Within one
of these threaded holes 7 is mounted an elevation
point suspension for the assembled sight unit C.
adjustment screw 2 securely held therein by the
lock nut 3 mounted thereon for varying the ele
vation of one telescope end. Also the opposite
groove side walls 2 are provided with threaded
screw holes 9, positioned therein at right angles
to their respective wall surfaces, and carry
threaded adjusting screws 4 and 5 mounted there
10 in. A suitable lock nut 6 is mounted on each of
the said adjusting screws for locking them in any
adjusted position. One of the side adjusting
screws, 5 is preferably of a micrometer construc
tion and formed with a cylindrical head section
against their respective sight mount walls, ,se
curely clamping same therein. The elevation
15 having parallel milled graduations h formed
around the circumference thereof, and preferably
calibrated to represent some pre-determined olf
set desired for the sight unit to be mounted with
in the base grooves, such as fractions of minutes
or degrees of angle for some speci?c sight length.
The end surface of the micrometer screw head
preferably being graduated in sixty equal spaces
representing minutes or multiple of minutes of a
degree, and said end surface bearing the numerals
0 and 30 positioned diametrically thereon, so that
the micrometer screw is readable in either direc
tional turn. Fixedly mounted on the base arm
frame b, adjacent the micrometer screw 5, is a
spring pawl 1, positioned to engage the milled
30 graduations h of the screw 5, for preventing free
rotations thereof, and to determine the exact de
sired screw adjustment required. The pawl end
is preferably set to contact the milled graduations
on the top side, and is designed to indicate the
CO Cl zero setting point for the sight adjustment in its
initial alignment with the gun barrel centerline,
when all screws are properly adjusted and tight
ened. The base I is securely attached to the gun
barrel A, or gun receiving case B, in its pre-deter
40 mined position, by means of suitable screws l2,
said base being positioned thereon with the groove
centerline parallel with the gun barrel.
Within the base triangular slide grooves e
are placed special sight mounts 8 and 9. When
these mounts are applied to the telescope type of
sight as indicated in Figs. 1 to 5, they are pref
erably made in separate units as illustrated, also
of steel, machined and hardened. Each mount
is formed with a triangular base section 70 having
an extended circular spring attaching ring clamp
m at the vertex. The top side of the attaching
ring section is also extended forming separated
arm ends, and is provided with suitable clamp
ing screws l0 mounted therethrough. The tri
angular base section 74: is formed with a recess n
The adjusting screws 4 and 5 are then tightened
adjusting screw 2 may be mounted in either front
or rear base arm holes f, as desired.
The proper initial sight adjustment should be
made with all adjusting screws 2, 4 and 5, and
continued until the sight unit C is in its true
alignment with the supporting gun barrel, for
the micrometer screw setting at zero. All sub
sequent adjustments for wind or elevation may
be easily determined by the micrometer adjusting
screw 5. After adjustment is made, all look nuts
are tightened on their respective adjusting screws
to be disturbed only when readjustment is re
quired, or for removing the sight unit from the
base I. The telescope unit C may be easily re
moved from the base by loosening the adjusting
screws 4 on the side opposite the micrometer
screw 5, and without disturbing the arranged
sight adjustment, and later remounted when de
sired.
When more than one type of sight unit is to be
used on the same gun or base, either of the tele
the base la may be slightly lengthened at one
end providing one longer cross arm ha and which
is provided with a double set of adjusting and
micrometer screws 4 and 5, as illustrated in Figs.
6 and '7. The remaining base construction is
the same as previously described. The inter
changeable sight units C and D being provided
with the same triangular sight mount base sec
tion It, as in the former case, but each positioned
and with its opposite triangular sight mount base
positioned to engage one pair of adjusting and 40
micrometer screws 4 and 5 in the long base arm "
end, arranged with a different pair for each type
of gun sight units to be used therein. The sight
units are then interchangeable in the base la
without disturbing their respective prior sight
adjustments.
A modi?ed form of base is illustrated in Figs. 8, 55
ture bb is the same as described for the base I , but
means of their respective clamp screws l0, as
shown in Figs. 1 and 2, the assembled unit may
easily be inserted within the triangular slide
grooves e of the base I, from the rear, and until
the stop projection 12 of the mount 8 engages its
respective base arm b. This positions the sight
unit within the base with one sight mount resting
45
A short ?xed peep sight unit D is illustrated in
the Fig. 7, and an elongated sight unit structure
is shown in Fig. 11 of the drawings. In each case
the bar body 1' is made integral with the sight
mount bases is, preferably assembled as one unit,
and are intended to illustrate the application of
any sight unit provided with attached ?anged
mount bases.
vided with a stop arm p projected below the tri
When the mounts 8 and 9 are properly and se
35
ed, are anchored at the narrow base arm end b
9 and 10, and are of the single or separated struc
ture. .The triangular grooved cross-arm struc
curely attached to the telescope sight unit C by
30
with different longitudinal spacing on its sight
unit body. Both sight units C or D, when mount
lengthwise thereof, providing a two point frame
support. One of the sight mounts, 8 is also pro
angular base k, designed to engage the base frame
arm b for preventing slippage of the mounts
therein when subjected to the recoil of the gun
upon discharge.
2.5
scope, or ?xed peep sight type, C or D respectively, ‘
is provided with double curved side plates aa,
one on either side thereof.
The base section is 60
provided with attaching screw holes dd in the
upper walls, instead of the side plates as previ
ously shown. Each base section is also provided
with threaded adjusting screw holes 1‘ and g as in
the former case, but the separated base sections 65
may be mounted on the gun barrel, or receiver
case, in any desired longitudinal positions, and
may be better adapted to longer telescope sight
units C, or gun barrels having side projections
thereon. These separated base sections may be 70
made for a single pair of adjusting and microm
on the elevation adjusting screw 2 clear from the
base arm b as shown in Fig. 5, and with the other
eter screws 4 and 5 as illustrated in Fig. 9, or
with the double pair of screws as shown in Fig. 10,
anchor sight mount 9 resting directly on the base
arm as shown in the Fig. 4, providing a three
tion is the same in either case as illustrated in 75
similarly as in the former cases.
The cross-sec
wwui wit
3
2,117,684
Fig. 8. The operation and application are exactly
the same as in the previously described structure
for Figs. 1 to 7.
It is apparent that my device is subject to vari
ous modi?cations in both design and arrange
ment of parts, without departing from the spirit
of my invention, and I therefore claim not only
the actual structure disclosed, but any modi?ca
tion thereof that is substantially a substitution
10 of parts herein shown and described.
Having fully described my gun sight mount,
H
l
pendicular thereto for engaging and laterally ad
justing each base section and securing the same
in position on said base.
\ 5
4. A sight mount for guns comprising a base\
elongated longitudinally of the gun barrel, op-i
posed upstanding inwardly-inclined ?anges on\
said base forming at each end thereof an under- A
cut groove, a suitable sight unit including two to
rigidly connected triangular base sections each
what I claim as my invention and desire to secure
by Letters Patent is:
I
shaped to loosely ?t in a respective groove, a ver
tical sight adjusting screw mounted in the base
1. A gun sight unit adapted for mounting a
detachable sight unit on a gun barrel and used
between the ?anges at one end thereof, and ad
justing screw means mounted through each ?ange i5
therewith, comprising two separated base frames
provided with suitable means for ?xedly attach
perpendicular thereto for engaging and laterally/1
ing same to the gun barrel in alignment with each
position on said base.
5. A sight mount for guns comprising a base
other along said barrel, said base frames being
20 formed with undercut triangular grooves length
wise thereof parallel with the supporting gun
barrel center line, each of said base frames being
provided with a pair of threadably mounted ad
justing screws oppositely positioned in their re
25 spective groove side walls perpendicular thereto,
one of said adjusting screws having a graduated
head, one of said base frames being provided with
an elevation adjusting screw threadably mounted
in the groove bottom on the center line thereof
30 normal to the barrel centerline, sight mounts
formed with triangular base sections each ad
justably mounted within a respective one of said
base grooves and positioned therein to be engaged
and laterally shifted by their respective adjusting
35
loosely ?t in a respective groove, and adjusting
screw means extending through each ?ange per
screws, and a suitable sight unit ?xed to said
mount.
2. A sight mount for guns comprising a base
elongated longitudinally of the barrel, opposed
upstanding inwardly-inclined ?anges on said base
40 forming at each end thereof an undercut groove,
a sight unit including two rigidly connected tri
angular base sections each shaped to loosely ?t
in a respective groove, and means extending
through each ?ange perpendicular thereto for en
_ gaging and laterally adjusting each base section
and securing the same in position on said base.
3. A sight mount for guns comprising a base
adjusting each base section and securing same/in
elongated longitudinally of the gun barrel, op- 20
posed upstanding inwardly-inclined ?anges on
said base forming at each end thereof an under
cut groove, a sight unit including two rigidly con
nected triangular base sections each shaped to
loosely ?t in a respective groove, one of said tri- 25
angular base sections being formed with a recoil
stop arm positioned to engage the mount base
wall, elevation sight adjusting means mounted in
one base end between the inclined ?anges, and
means extending through each ?ange perpen- 30
dicular thereto for engaging and laterally adjust
ing each base section and securing the same in
position on the base.
'
6. A telescope sight mount for guns compris
ing a base elongated longitudinally of the gun 35
barrel, opposed upstanding inwardly-inclined
?anges on said base forming at each end thereof
an undercut groove, a telescope sight unit includ
ing two rigidly connected triangular base sec
tions each shaped to loosely ?t in a respective in
groove, one of said triangular base sections being
formed with a recoil stop arm positioned to en
gage the mount base wall, an elevation sight
adjusting screw mounted in one base end between
the inclined ?anges, and an adjusting screw 45
mounted through each ?ange perpendicular
thereto for engaging and laterally adjusting each
elongated longitudinally of the gun barrel, op
base section and securing the same on said base,
posed upstanding inwardly-inclined ?anges on one of said adjusting screws having a graduat d
said base forming at each end thereof an under
cut groove, a sight unit including two rigidly con-‘MANN
SKARDON T. SMITH.
nected triangular base sections each shaped to
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