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SePt- 24, 1946=
J. E. SOENKEY
2,408,277
GUN CONTROL DEVI'GE
Filed Aug. 19, 1941
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pt. 24, 1946.
J. E. SOENKE
2,408,277»
GUN CONTROL DEVICE
Filed Aug. 19, 1941
3 Sheets-Sheet 2
.Ja/Mr E. GOE/VKE)
Sept. 24, 1946...
J. E. SOENKE
GUN CONTROL DEVICE
Filed Aug. 19, 1941
70
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3 Sheets-Sheet
2,408,277
Patented Sept. 24, 1946
onirso STATE S PATENT OFFICE
2,408,277
GUN CONTROL DEVICE
.l'ohn E. Soenke, Baltimore, Md, assignor to The
,Glenn L. Martin Company, Baltimore, Md.
Application August 19, 1941, Serial No. 407,395
'8 Claims. (01. 89-27)
1
.
The invention relates to gun control mechaé
nism and especially to mechanism for controlling
the position and the ?ring of machine guns.
2
Tin its turning movement it would strike the
vehicle body.
Machine guns are ordinarily mounted in ve
hicles in such a manner that they may be aimed
in different directions. During such movement,
some portion of the vehicle may come within the
line of ?re and, unless the gunner is very careful,
the vehicle may be damaged. This is especially
true when the gun is mounted in a turret for
movement in train and elevation about vertical
A further object is to provide a mechanism for
accomplishing this result which is controlled by
the movement of the gun and turret, and espe
cially one which is operated jointly with and
forms a part of the gun ?re control device re
ferred to above.
Further objects and advantages of this inven
10' tion will appear more fully from ‘the following
description, particularly when taken in conjunc
tion with the accompanying drawings which form
and horizontal axes respectively.
a part thereof.
The primary object of the present invention is
In the drawings:
to provide means for controlling a gun so as to
Fig. 1 shows in side elevation a control mccha~
15
prevent it from discharging shots in certain direc
nism embodying the invention;
tions.
Fig. 2 is a bottom plan view thereof;
A second object of the invention is to prevent
Fig. 3 is a cross section substantially on the
?ring of the gun when it is pointed in certain _
line
3—3 of Fig. 1;
directions within its range of ?re, and especially
Fig. 4 is an enlarged detail cross section gen
when it is pointed at some part of the Vehicle in 20 erally on the line 4—4 of Fig. 3;
V
which it is mounted.
» Fig. 5 is a cross section on the line 5—5 of Fig.
Still another object of the invention is to pro
3; and
vide, in conjunction with a gun mounted for
Fig. 6 is a circuit diagram.
movement in train and elevation, an arrange
Figure '7 shows a typical installation of the in
25
ment controlled by the movement of the gun to
vention on a turret mounted in a vehicle such as
prevent ?ring thereof when it is aimed in cer
in the fuselage of an airplane.
tain directions.
The invention may be applied to the control
7 A further purpose of the invention is to pro
of two guns 2, indicateddiagrammatically in Fig.
duce, in combination with a; gun mounted in a 306, these guns being preferably mounted in a tui=~
turret for movement therewith in train and with
ret such as that shown in the application of Huey
respect thereto in elevation, a device controlled
and rl‘owner, Serial Number 388,255, ?led April
by the movement of the turret and gun for cut
12, 1941. In this structure, the guns are mounted
ting o? the ?re of the gun from certain areas.
in a turret which turns in train about a vertical
An additional object of the invention is to
axis, while the guns turn in elevation in the tinprovide a mechanical arrangement and an elec 35 ret about a horizontal axis 3. Rotation of the
trical circuit controlled thereby for accomplish
turret is produced by engagement of'a gear car~
ing these results.
ried thereby with a ?xed rack A.
Another disadvantage of turret-mounted guns
As shown diagrammatically in Fig. 6, each gun
is that the gun, in swinging, is likely to strike the
carries a segment 8 driven through gears [8 from
40
wall of the vehicle, if this wall is curved or is not
a common gear !2 driven by motor lli. Eleva~
tion of the guns is produced by energization of up
exactly perpendicular to the axisabout which the
coil l6 or down coil l8 of the motor. These coils
gun turns. This is likely to damage both the gun
are connected to contacts 29, 22, on a segment
and the vehicle, or, where the gun is power oper
24 ‘connected by gear 25 to gear I2. The other
ated, the mechanism for moving the same.
45
terminal of current source 28 is connected by line
Therefore an additional object of the invention
29 to contact 30 on a control stick '32. This‘ con
‘is to provide, especially in a power operated tur
stitutes a follow up mechanism to move the guns
ret, a mechanism which will prevent the .gun from
up or down respectively as the stick is pulled back
striking the vehicle wall.
or pushed forward.
Another purpose is to regulate a power mecha
Each of the guns has a firing mechanism 36
nism for lifting and lowering a turret mounted
which is connected in a circuit with battery 38
gun in such a manner that, whatever be the .posi
tion of the manual control means, the lifting
means will always be operated whenever the tin
ret turns, if the gun 'is in such a position that "
and stick’trigger switches 38, 136 ‘carried by ‘con
trol stick 32. Closing of these switches normally
causes the ‘guns ‘to ?re.
‘
3
2,408, 2'51"?
The control mechanism of the present inven—
tion comprises an upright cylindrical casing 42
4
30. Thus when switch 80 is closed the motor will
always turn to raise the guns, whether the gun
ner operates his controls accordingly or not.
ably and slidably mounted within this casing is
When the turret is mounted to turn about an
a drum 46. This drum has a closed end 48 CI axis which is inclined with respect to the sur
through which is slidable a rod 50. An inner
rounding wall of the vehicle, as shown in Figure
sleeve 52 is secured to end piece 48. Within sleeve
7, the drum 46 is provided with a cutout 98 oppo
52 is a plunger 54 turnably secured by nut 56 on
site the pin 84 of switch 80. This cutout is so
the end of rod 50f A coil spring 58 within the
shaped that, whenever the guns are at a low
mounted on a part 44 of the turret frame. Rotat
sleeve normally pushes plunger 54 and rod 50 10 angle that is, substantially horizontal, as shown
downward (Fig. 5) or outwardly from the drum.
in Figure 7, that they would strike the fuselage
This spring and plunger construction allows over
on the opposite side of the turret if they were
travel of the drum.
maintained at such angle during turning of the
Rod 50 carries a rack 60 which is slidable
turret, such turning of the turret by longitudinal
through the lower end of casing 42. V This rack 15 movement of the drum will bring the cutout op
engages a gear 62, which in turn is mounted on
posite the pin 84' and will release such pin to
a shaft 6| carrying a gear 63 which engages a
permit switch 80 to close. This will then elevate
second gear driven by the elevation motor 14,
the guns to a su?icient degree to clear the vehicle
for example the gear 26. Thus the drum 46 is
wall as the turret turns, after which the drum
moved longitudinally in the casing in accordance
will again engage pin 84 and permit desired ma
with the elevation angle of the guns 2.
'
nipulation of the gun in elevation.
An outer sleeve 64 is slidable longitudinally on
sleeve 52, but is prevented from turning with re
While I have described herein one embodiment
of my invention I wish it to be understood that
spect thereto by keys 66. Secured in the end of
I do not intend to limit myself thereby except
sleeve 64 is a worm gear 68. This gear is driven 25 within the scope of the appended claims.
by a worm 76 mounted on shaft 12. This shaft :=
I claim:
carries a gear 14 meshing with ?xed ring gear 4.
1. In a device of the class described including
Obviously, as the turret turns with respect to the
a turret, guns mounted to turn about a ?rst axis
ring gear, worm 10 will be turned and will turn
in said turret which is mounted to turn about a
sleeve 64 and there through drum 46. The an 30 second axis, an electric ?ring control circuit for
gular position of the drum will therefore be de- ‘
said guns, motor means and an electric circuit
pendent on the position of the turret and guns
control means therefor to move said guns about
in train.
said axes, a housing, an apertured drum mounted
Mounted on casing 42 are three switches ‘I6,
in said housing for turning and sliding movement
18 and 8D. Switches 16 and 18 are arranged in
therein, means for sliding said drum along its
1-3.5
the control lines to ?ring mechanisms 34 of the
axis in said housing in accordance with move
two guns, and are normally closed, although urged
ments of the guns about said ?rst axis and for
to open position. Each of these switches is con
turning said drum in said housing in accordance
trolled by a button 82, and is closed as long as
with movements of the turret about said second
pressure is applied to this button but opened 40 axis, said drum having a plurality of cut-out por
when such pressure is released. Slidably mount
tions in the surface thereof, a plurality of switches
ed in casing 42 opposite the buttons 82 are pins
mounted on the housing corresponding to the
84, which are urged out of engagement with but
number of cut-out portions, switch actuating
tons 82 by springs 86. However, pins 84 are of
means extending through said housing and nor
such length that they are held against buttons 82 45 mally engaging the surface of said drum, said
when they are opposite a solid part of the surface
switch actuating means arranged to operate said
of drum 46 (see Fig. 4).
switches when said switch actuating means regis
Drum 46, however, is provided with cutouts or
ter with said cut-out portions, one of said switches
contoured holes 88, having sloping edges 90 (Fig.
connected to control the ?ring circuits of each
4) cooperating with the tapered ends of pins 84. ‘50 gun and one of said‘switohes and cut-out por
Whenever one of these holes is opposite a pin, ‘ '
tions constructed and arranged to actuate the
spring 86 pushes the pin away from button 82
motor control circuit of the elevating motor to
raise the guns whenever the switch registers
and the switch will open. The contour of each
with said cut-out portion.
of the holes 88 is so chosen that, when the gun
controlled thereby is in a position where it should 55
2. In a device of the class described including
not ?re, as when it is pointed at a part of the
a turret mounted in a vehicle, guns mounted in
said turret having motors formoving said guns
vehicle, a cut out will, because of the movement
of drum 46 in accordance with the train and ele
in elevation and azimuth, electric circuit means
vation of the guns, come opposite the pin 84.
for controlling the motion and ?ring of said guns
The switch in the circuit to that gun will then 60 comprising a drum member mounted for rotary
open so that the gun cannot be ?red until it has
moved to a clear position, so that a solid portion
and sliding movement, means for moving said
drum member in response to movements of the
of the drum is again brought beneath the pin.
guns in elevation and azimuth, cut-out portions
The third switch 80 is normally held open, but
on the surface of said drum member, switch
may be moved to closed position. This switch is 65 means cooperating with said cut-out portions to
in circuit with a battery 92 and solenoid 94. This
energize the control circuits of said guns, one of
solenoid operates a conductor bar 96 arranged
said switch means controlling the ?ring of each
in circuit 29. As long as switch 80 is open and
gun and another of said switch means controlling
solenoid 94 is dead, bar 96 maintains a circuit
through line 29 so that motor l4 may be con
trolled for either up or down movement by con
trol stick 32. If, however, switch 80 is closed,
solenoid 94 lifts bar 96 and breaks line 29, at the
same time closing a circuit to up winding N5 of
the elevation motor of said guns, a manually op
erated control for the elevation motorrfor ele
vating and lowering said guns, said last named
switch means controlling the circuit of said man
ually operated control for moving the guns in an
upward direction when said switch actuating
motor I4 regardless of the position of contact 75 member comes in registration with the cut-out
2,408,277
F
0
portion of said drum to prevent the guns from
striking the vehicle.
6
6. In a device of the class described, a gun
mounted in a vehicle for movement about ele
vation and azimuth axes, a control device there
for comprising a drum member mounted for
movement in two different directions, means for
moving said drum member in such two directions
in response to movement of said gun about said
two axes respectively, motor means for causing
the gun to turn about one of said axes, manually
3. In a device of the class described, a gun
mounted in a vehicle, motor means and control
means therefor for moving said gun about eleva
tion and azimuth axes, an apertured drum mem
ber mounted for movement in two different di
rections, means for moving said drum member
in such two directions in response to movement
operated control means for said motor means,
of said gun about said two axes respectively, an 10 and switch means controlled by the position of
electric firing control circuit for said gun and
said drum member for rendering said manual
switch means in said circuit controlled by the
control means inoperative and for controlling
position of said drum member to interrupt said
said motor means for mOVing the gun about such
circuit and prevent ?ring of said gun in prede
axis in a direction to prevent the gun from strik
termined directions, and other switch means con
ing the vehicle, either with its barrel or bullets.
trolled by the position of said drum member for
7. In a device of the class described, a gun
overriding the control means for said gun motor
‘ mounted to turn about a ?rst axis in a turret
means for moving the gun about one of said axes
mounted to turn about a second axis, a control
in a direction away from the surface of the ve
device therefor comprising a drum mounted for
hicle so as to prevent the gun from striking the 20 turning and sliding movement, means for sliding
vehicle.
4. In a device of the class described, a gun
mounted in a vehicle for movement about eleva
tion and azimuth axes, a control device therefor
comprising an apertured drum member mounted
said drum in accordance with movement of the
gun about said ?rst axis and for turning the drum
in accordance with movements of the turret about
said second axis, said drum having a cutout in the
surface thereof, a switch member engaging the
surface of the drum and movable into said cutout,
motor means for turning the gun about said ?rst
axis, manually operated means to control said
motor means, and means controlled by said switch
for movement in two different directions, means
for moving said member in such two directions
in response to movement of said gun about said
two axes respectively, an electric ?ring control
circuit for said gun, switch means in said circuit 30 member for rendering said manually operated
controlled by the position of said drum member
control means inoperative and for controlling
to interrupt said circuit and prevent ?ring of
said turning means for moving the gun about
said gun in predetermined directions, motor
such axis in a direction to prevent the gun from
means for causing the gun to turn about one of
striking the vehicle, either with its barrel or
said axes, manually operated control means for
bullets.
said motor means, and other switch means con
8. A control device for use with power oper
trolled by the position of said drum member for
ated guns mounted to turn about a ?rst axis in
rendering said manually operated control means
inoperative and for controlling said turning
means to move the gun about such axis in such
a direction to prevent the gun from striking the
vehicle.
5. In a device of the class described, a gun
mounted to turn about a ?rst axis in a turret
mounted to turn about a second axis, a control
device therefor comprising a drum mounted for
turning and sliding movement, means for sliding
said drum in accordance with movement of the
gun about said ?rst axis and for turning the drum
in accordance with movement of the turret about
said second axis, said drum having cutouts in the
surface thereof, a ?rst switch member engaging
the surface of said drum and movable into one
of said cutouts, a control circuit including said
switch member and means in said control circuit
controlled by the position of said switch member
for preventing ?ring of the gun, means for turn
ing the gun about said ?rst axis, manual means
to control said turning means, a second switch
a turret which is mounted to turn about a second
axis, and having motor means to move said guns
about said axes, said control device comprising a
housing, an apertured drum mounted in said
housing for turning and sliding movement there
in, said drum adapted to slide along its axis in
said housing in accordance with movements of
the guns about said ?rst axis and for turning in
said housing in accordance with movements of
the turret about said second axis, said drum hav
ing a plurality of cutout portions in the surface
thereof, a plurality of switches mounted on the
housing corresponding to the number of cutout
portions, switch actuating means extending
through said housing and normally engaging the
surface of said drum, said switch actuating means
being arranged. to operate said switches when
said switch actuating means register with said
cutout portions, one of said switches connected
to control the firing circuits of each gun and one
of said switches and cutout portions adapted to
member engaging the surface of the drum and 60 actuate the motor control circuit of the elevating
movable into the other of said cutouts, and circuit
motor to increase the elevation of the guns when
means controlled by said second switch member
ever the switch registers with said cutout portion.
for rendering said manual control means inoper
ative and for controlling said turning means for
JOHN E. SOENKE. '
moving the gun about such axis in a direction to 65
prevent the gun from striking the vehicle.
g
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