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Патент USA US2409042

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F. y. HART ETAL
2,409,041. '
GUN MOUNTING MECHANISM
Filed May 12, 1942
4 Sheets-Sheet 1
22
Oct. s, 1946.
F. v. HAR‘f Em.
GUN MOUNTING MECHANISM
Filed May 12, 1942 ~
I 2,409,041
I
4 Sheets-Sheet 2
Get 8, 1946.
F. v. HART ETAL
7
GUN
MOUNTING
MECHANISM
Filed_.- May 12, 1942
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206
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' 2,409,041
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4 SheetS-Sheet 3
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Oct. 8, 1946.
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F, v, HART ErAL
2,409,041
GUN MOUNTING MECHANISM
Filed May 12, 1942
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Patented Get. 8, 1946
2,409,041
UNlTED STATES PATENT OFFICE"
2,409,041
GUN MOUNTING IWECHANISM
Fred V. Hart, Lynn, and Lambert S. Linderoth,
J12, Marblehead, Mass, assignors, by mesne as
signments, to the United States of America, as
represented by the Secretary of War
Application May 12, 1942, Serial No. 442,688
5 Claims. (CI. 89-41)
2
1
the gun by movements of the handle which cor
respond exactly in direction or angularity to those
of the gun and correspond in a predetermined
ratio with the speed and extent of movement of
the gun. Furthermore, to avoid the necessity for
the operator to return'the control handle to a
zero or neutral position after every movement of
the gun, follow-up mechanisms have been pro
understood that, broadly, it is equally adapted to
vided sothat the stopping of the handle is effec
remote control of other devices, such as moving
10 tive immediately to stop the movement of the
tools or the like in shoe machinery.
gun. Furthermore, if an operator moves the
An object of the invention is to provide an im
handle quickly, the gun moves quickly with a cor
proved remote control mechanism for a device ca
responding speed. The follow-up mechanism po
pable of movement in a plurality of paths, as in
sitioned between the control member and'the
planes normal to one another. The direction,
extent, and speed of movement of the device to 15 power-operated mechanism is arranged to op
erate without overthrow or inaccuracy by direct
be controlled will correspond exactly or corre
ly connecting the follow-up to the movable part
spond in a predetermined ratio with the direc
of the power-operated mechanism and hence to
tion, extent, and speed of movement of the op
the gun itself. Another part of the follow-up
crater-controlled member, to the end that an op
mechanism is connected directly to the control
erator who has been accustomed manually to con
handle and the connections are arranged to have
trol the device in its various movements will read
opposite e?ects, to the end that the gun is
ily eiiect a corresponding control by similar
brought to a stop when the operator-controlled
movements of a remotely located control member.
member is stopped.
,
.
.
Guns mounted upon airplanes are usually sup
In the illustrated apparatus, ?uid-pressure mo
ported for substantially universal movement
tors are provided for causing the movements of
within a limited range as, for example, by piv
the gun, and these are controlled by balanced
otally supporting the guns for tilting movement
valves, so that, once the gun is positioned, it is
about one axis to control the elevation and for
held automatically in that position without effort
swinging movement about an axis normal to the
on the part of the operator. The valves have
?rst to control the deflection or azimuth. The
movable members which are directly operated
space in which said guns are mounted is cramped
by follow-up levers having dual fulcrums one of
and, usually, adequate armor protection for the
which is directly connected to and responds to
operator cannot be provided adjacent to the guns.
the movements of the control member while the
It is well understood also that the force'required
other is directly connected to the gun. These
to hold such a gun against the pressure of the
motors and valves are located closely adjacent to
air stream is very considerable and that it thus
interferes with the speed with which such gun
the gun, while the connections between the fol
may be trained and the accuracy with which it
low-up levers and the control member enable re
may be held in the desired position.
mote location of the control member. As herein
A, more speci?c object of the invention is to 40 illustrated, these connections are made by means
provide a remotely located control handle mount
of Bowden wires which are ‘?exible enough to be
ed for substantially universal movement in a
carried around any necessary corners and are
protected portion of the airplane and to connect
stiff enough ‘to transmit the force needed to op
that control handle to a similarly mounted gun
erate the valves.
by power-operated apparatus including a follow
Preferably, a sighting device is provided which
up mechanism connected directly» to the movable =
is
als'olocated remotely from the gun and which
device, such as the gun, to the end that the di
is mechanically connected to the gun to follow its
rection, speed and extent of movement of the
movements. In a modi?ed ‘form of the invention,
device shall correspond to the direction, speed
the control handle is directly attached to the
and extent of movement of the control member. .
This invention relates to remote control for
power-operated devices and is herein shown as
embodied in an arrangement in which it is de
sired to have the movements of the device corre
spond to the movements of a control member.
The invention will be herein described in its ap
plication to the training of a gun but it will be
sighting device. When this device is moved into
In the case of machine guns, for example, these ~
are usually pivotally mounted for movement
about axes located in planes which are normal to
visual alinement with the target, the gun is
power-operated to bring it immediately into a
one another and are trained by handles secured
to the rear end of the gun. To enable a trained
corresponding alinement.
gunner to learn quickly to operate the gun by
remote control, provision has been made, accord
best be understood from a consideration of the
These and other features of the invention will
ing to our invention-of a control handle mounted
for substantially universal movement and ar
ranged continuously to control themovements of
so
following description taken in connection‘ with
the accompanying drawings, in‘which
Fig. 1 is a vertical section taken‘ longitudinally
of the end of'a fuselage, showing in side ele
2,409,041
3
4
vation the gun mount, one of the control handles,
permit the guns to swing about a horizontal axis
are joined to suitable projections 56 upon pairs
of vertical side plates 52. The side plates 52
and the‘sight;
Fig. 2 is a plan view on a larger scale of the
control handles;
3
Fig. 3 is a detail in elevation, with parts broken
away, of the handle-supporting bracket viewed
from the side'opposite to that shown in Fig. 1;
Fig. 4 is an elevation of the gun mounts look
ing toward the rear of the guns and with the
are bent outwardly (Fig. 4) for compactness of
design and the lower ends of each pair of the
plates are bolted to a W-shaped member 54,
shown at the right in Fig. 5. At their upper ends,
the plates 52are bolted to T-shaped caps 56 and
5?, shown in elevation at the top of Fig. 4 and
guns themselves shown diagrammatically as if in 10 in plan in Fig. 7. The head portion of the T
shaped member 56 has a stud 58 (Fig. 7) in a ball
section;
Fig. 5 is a horizontal section on broken line
V--V of Fig. 4;
’
Fig. 6 is a vertical section through the gun
‘elevating motor taken on the line VI-VI of
Fig; 4-. ;
bearing'about an axis normal to a cross plate
Ell which is carried on the under side of the
partition [8 shown in Fig. 1. A rod 2l6 attached
to the cap 51 is similarly pivoted in. plate 60.
At the lower ends of these gun-carrying plates
52, the W~shaped pieces 54 (Fig. 4) are pinned
to upright rods 62, alined with stud 58 and rod
2l6, respectively. The lower end of each of these
and illustrating a portion of the links connect
20 rods 62 is carried by ball bearings on a base plate
ing the gun to the sight;
64v which is secured to the partition 20 of the
Fig. 8 is a detail view of a portion of the con
fuselage. The T-shaped caps 56 and 51 at the
nection between the linkage and the sight sup
top of the gun supports are interconnected by
port and taken below a partition in the fuselage
a link 66 (Fig. 7) so that they maintain paral
shown in Fig. 1;
I
lelism, and the swinging of the gun’ mounts in
Fig. 9 is a horizontal section on the line IX—IX
azimuth about each of their respective axes is
of Fig. 4 and looking down upon the control
Fig.’ 7 is a plan view of the gun supports, show
ingrthe motor for swinging the guns laterally
valves;
Fig. 10 isv an enlarged vertical’ section through
the control valve shown at the right of Fig. 97;
effected by power through the action of ?uid
pressure’ means herein illustrated as a hydraulic
motor ‘iii in which there is a piston 12 having a
Fig. 11 is an elevation of the support for the 30 piston rod 13 connected by a link ‘M, at the left,
to. the left T-shaped member 55.
sight and is taken from the left in Fig. 1;
Tilting of the guns in elevation about the hori
Fig; 12 is a view similar to Fig. 1 but showing
zontal fulcrums 46 is effected by another hy
an alternative arrangement in which the con
draulic motor 86 (Figs. 4, 5 and 6) secured to the
trol handles are positioned near the sight;
base plate 64. The piston 82 of this motor is
Fig. 13 is an elevation showing the modi?ed
joined by a piston rod 84 to a slide 86 having
gun sight and control handles and taken from
side ?ns 88 and at its lower end 90 encircling
the left in Fig. 12;
'
Fig. 14 is a horizontal section on the line
XIV—XIV> of Fig. 13; and
Fig. 15.is a detail horizontal section on the line
the outside of the cylinder of the motor 80. The
lower end '90 is grooved to receive side plates
92 and 94 (Fig. 5) between the opposite ends
of which are split blocks 96 which rotatably re
XV—XV of Fig. 12.
ceive the sleeve-like lower portions 98 of travelers
One opportunity for the utilization of the con
I00 each slidable upon one of the rods 62 and
trol apparatus to be described is- found in air
prevented
from rotation with respect thereto by
planes where, for example, a gun compartment 45
a spline I62. The travelers lll? are joined by
I0 is formed inside a section of the fuselage l2
links I64 to the pivots 48 upon the arms 44 which
as, for example, at the tail of an airplane where
are clamped to the rods 42 at the sides of the
guns. Operation of the motor 80 is therefore
between partition plates l8 and 26~with the'guns 50 effective to tilt the guns about their horizontal
fulcrums 46 so as to elevate or depress the muzzles
pointed rearw’ardly through a port 22 in any
the twin guns i4 and I6, shown here in outline
as being of the machine-gun type, are carried
direction within a sixty-degree cone for'each
without interfering with their lateral movement.
It will be seen, therefore, that, since the lateral
gun. Inasmuch as the skin of the fuselage'pro
movements ina'horizontal plane, for example,
vides no substantial protection against gun ?re,
are independent of the up-and-down movements
an operator’s compartment has been divided off
55 of the guns in vertical planes normal to the plane
by a partition 24 ofarmor plate in which, for
of, its, lateral movement, it is only necessary to
convenience, there is a hinged door 26 to be
control the admission of fluid to the motors l6
utilized in supplying ammunition to ‘the gun or
and 80, in order to be able to point. the guns in
for any necessary repair work. The. head of
any one of an, in?nite number of directions. In
the gunner will be within a bulge‘ 28 of the 60 so doing, it is convenient to consider the move
fuselage which is provided with suitable windows
ment of a point on the back end of the gun, for
36 and, in this portion of the fuselage, there
is provided a gun sight 32 of any suitable type
example-,and to note that the angular movement
of a point onthe control handle is duplicated
but herein shown in outline as a standard re?ex
by the point on the gun, while the speed and ex~
' sight having a casing 34 and, an aiming device 65 tent of movement of the gun corresponds in a
utilizing'a cross-hair image 36 (Fig. 11). The
predetermined ratio, to the speed and extent of
pointing of the gun is eifected by means of dual
movement of ' the. handle.
control handles 36 universally supported upon a
The pointing of the guns was formerly effected
bracket bill which is fastened to the under side
by grasping handles H6 fastened ‘directly to the
of the armor partition 24.
70 guns themselves to move them manually but,
The guns l4 and I6 are each'provided with
when the guns are mounted as they are upon
side rods 42 upon which there'are clamped arms
airplanes, the air currents along the fuselage
44 (see also Figs. 4 and 7) which extend for
tend constantly to divert the guns. from their
Wardly to ‘provide fulcrums 4'6 and rearwardly
intended directions, and the physical labor of
to provide pivots 48. The fulcrums 46 which 75 moving and aiming them is very considerable.
2,409,041
5
Advantageously, therefore, the control handles
38 are mounted for movement on the‘bracket
40 so as to correspond to the movements of the
handles IIO on the guns themselves. To this
end, the handles are clamped to a T-shaped car-.
rier II2 (Figs.v 2 and 3) which is pivotally
mounted at II4 between arms II6 xtended up
wardly from a rotor IIB having a depending
sleeve portion pivoted in the bracket 40 for move
'ment around a vertical axis. The handle carrier
I I2 is provided with a notched portion I20 which
cooperates with a stop pin I22 to keep up and
down movements of the guns within the cones of
6
In the casing of the valve I50 is a ?xed sleeve
I60 provided with external annular grooves con
nected by a series of openings, such as that shown
at I62, to the interior of the valve in which there
is a slidable valve member I64 having a stem
I65 and provided at each end with a ?exible
packing I66 such as is shown in section at the
right end and having at its left end a guide block
I68 which is similar in shape to the block I68’
(shown at the left of Fig. 9) and has pivot pins
I69 like the pins I69’ in Fig. 9. These pins I69
are received in holes, slightly larger than the
pins, in the side arms I10 of a forked lever I12
which acts as a control member and is joined at \
?re. Similarly, the rotor IIB has a notched por- '
tion I24 (Fig. 2) corresponding with a stop pin 15 its lower end by a link I14 to an arm I16 clamped
‘to one of the vertical rods 62 which turns in its
I26 similarly to limit lateral swinging of the
ball-bearing base whenever the guns are swung
handles and hence of the guns. On the carrier
laterally. In that block I68 is a notch (not
II: is an arm I28 joined to a vertical rod I30
shown), such as that shown at I165 at the left
the lower end of which is connected to a bell"
crank I32 (Fig. 1) pivoted on the bracket 40. 20 of Fig. 9, in the block I68’. The notch of the
block I60 surrounds a ?xed rod I80 extending
The other arm of the bell crank is joined to a
out from the valve casing and having limit nuts
Bowden wire I34 leading to a bell crank I36
I82 to control its range of movement. The other
pivoted upon the casing of a control-valve mech
end of the lever I12 is connected by a link I84
anism I40 supported on a bracket I4I attached
to the base plate 64. This valve mechanism I40 25 to an end of the bell crank I49 to which there
are transmitted the right-and-left movements of
controls the motor 80 by which elevational move
the handles 38 through the Bowden wire I44.
ments of the guns are produced. The rotor II8
The valve member I64 has a series of piston:
associated with the control handle has an arm
like enlargements or lands I61 so that ?uid under
I42 (Fig. 2) to which there is joined a Bowden
wire I44 leading through a guide I46 on the 30 pressure delivered to the valve casing through a
port I90 will be transmitted to either the right
bracket 40 and another guide I48 (Fig. 9) to a
or the left end of- the cylinder of the motor 10 as
bell crank I49 pivotally connected to the casing
the handles 38 are moved. The enlargements I61
of a control-valve‘mechanism I50. The valve
are of equal diameter so that the valve is balanced
mechanism I50 is attached to the base plate 64
(Figs. 4 and 9) and controls movements of the 35 and the widths of the lands are almost exactly
guns in azimuth.
equal to the diameters of the coacting openings,
'
construction and operation and accordingly only
such as that at I62. Hence, only a minute move
ment of the valve member I64 is needed to open
given numerals like those used in describing parts
in that end of the cylinder 10 toward which the
to each number. Examples of such parts are
the piston I65’ and a block I68’ notched at I18’
to surround a ?xed rod I80’ and having pins I69’
by which it is pivotally mounted in a forked
follow-up lever I12’. This lever I12’ is pivoted
at one end to a link I14’ joined by a pin I15 to
the ?ns 88 of the slide moved by the motor 00 to
produce movements of the guns in elevation. The
balanced-valve mechanism I50 by means of which
the right and left movements of the gun to
change its azimuth may be effected is shown in
Figs. 9 and 10. The casing is provided with a
port I52 which communicates by means of a
pipe I54 with the left-hand end (Figs. 4 and '1)
vof the cylinder of the motor 10 so that, upon
the admission of ?uid through this pipe to the
cylinder, the piston 12 shown in Fig. 7, will be
moved to the right and the rear ends of the
guns I4 and I6 at the lower end of Fig. '7 will
be moved to the right. By means of another port
I56 and a connecting pipe I58 joined to the right
-hand end of the motor 10, movement of the rear
ends of the guns to the left may be effected by
the action of the pressure ?uid on the opposite
end of the piston 12. It will be recalled that
the piston 12 is connected by a link 14 with the
elongated portion of the T-shaped member 56 at
the top of the gun carrier and that the two guns
are connected by a parallel linkage including a
port I92, regardless of which way the piston 12
The control-valve mechanisms are identical in
the valve, thus making the apparatus instantly
one of them is herein illustrated and described
in detail. To facilitate this description, a few :40 responsive to movements of the control handles
38. The annular grooves in the valve sleeve I60
parts of the valve mechanism I40, which parts
adjacent
to the ends thereof are interconnected
are better shown and are like the corresponding
by a longitudinal passage I94 so that the oil,
parts of the valve mechanism I50, have been
of the mechanism I50 but with a prime added 45 piston 12 is moving, can be exhausted through a
is moved.
There is provided, therefore, by the control
member I12 which is arranged to operate the
50 valve I50 and which is oppositely connected to
the work and to the operator control, a follow
up mechanism the action of which is automatic.
The action of this follow-up mechanism more
over is continuous in that it effects an instant
55 response to the movements of the control handle
thereby avoiding any lag or hunting movements
of the gun and insuring the duplication by the
gun of the position of the control handle. ,
A movement of the gun is imediately trans
60 mitted to the sight 32 by reason of mechanical
connections extending between the two. To this
end, the sight is attached to hangers 200 (Fig.
11) pivoted at 202 between the upstanding arms
of a stirrup-like support 204, which is riveted
upon the upper end of a vertical rod 206.
The
lower end of this rod is rotatably supported in a
bearing 208 (Figs. 1 and 8) secured to the parti
tion 24, and turning movement about a vertical
axis, to accord with the lateral de?ection in
70 azimuth of the gun, is imparted to this rod by
means of a lever 2I0 (Figs. '7 and 8) attached
thereto and joined by a connecting rod M2 to
a lever 2I4 secured to the top of the vertical rod
2I6, which is fastened to the cap 51 at the top
link 66 (Fig. 7) so that they are always parallel. 75
of one of the gun supports (Fig. 4).
‘ __
2,409,041
7
Furthermore, it is necessary .to tilt the sight
32 about thepivots 292 to a degreematching
the up-and-down tilting of the guns, and thisis
done by means of a lever 22% (Fig. 1) fulcrumed
at 222 on the inner side of the fuselage l2.. The
lever 22!] has its outer end 224 forked (Figs. 4
and '7) and slidable in the grooves of a block 226
8
the up-and-down movementsof the slide 86 for
tilting the guns to elevate or depress‘ them. An
arm 3118 supports a sheath 310 for this Bowden
wire. It will be noted that the yoke 298 (Fig. 14)
is provided with a stop pin 3l2, which is adapted
to be engaged by ears on a collar 314 secured
to the upright sight-supporting rod 272. By this
arrangement, the lateral turning of the sight
mounted on the upper end of ‘a rod 228. ‘This
rod 228 slides in a suitable bearing in the upper
and the handles 260 is limited to the range of
plate 60 of the gun carrier and is given a reduced 10 movement, laterally, of the guns and supports.
movement proportionate to the movement of the
It follows that this modi?ed mechanism brings
gun-elevating slide 86 by means of a lever 230
the control handles 260 to a point beside the
fulcrumed at one end upon brackets 2'32 (Figs... 1
sight 32, and, by reason of the direct connection
and 4) depending from the plate 651, and pivoted
between the handles and the sight, causes sub
at the other end to a connecting rod 234 which 15 stantially synchronous movements of the latter
extends down to and is fastened to the slide 86.
and the guns, as theBowden wires 284' and 306,
At its inner end, the lever 220 is forked at 235
by reason of their connections to the control
(Fig. 7) and has a sliding and pivotal connec
valves l50 and M0, produce corresponding move
tion 238 (Fig. 11) with a block member 249 which
ments of the guns.
.
.
is slidably mounted on the supporting rod 205 20
In the operation of the arrangement illustrated
and has a spool portion 242 receiving a notched
in Figs. 1 to 11, the gunner, grasping the control
yoke 244 (see also Fig. '7). The ends of this
handles 38, will move them about the universal
yoke are joined by ?at links 246 (Fig. 1) to rigid
mounting provided on the bracket 40 and, by
arms 24:; which are integral with the hangers
means of the control mechanism including the
209. The lower ends of these links 2436 are con~ 25 directly-connected follow-ups, will cause an im
nected by parallel links 250 to downwardly
mediate training of the guns in such a manner
directed arms 252 which are a part of the stirrup~
that the angular displacement of a point upon
like hanger or support 204 (Fig. 11) , The hanger
the rear end of a gun will correspond exactly to
or support 264 thus forms a part of a parallel
the movements of a point on the control handle.
linkage, including the links 246, the arms 2% 30 These movements will be compounded of verti
and the links 258. Up-and-down movements of
cal movements in planes normal to one another
the gun-tilting slide 68 are therefore communi
about the fulcrums M5 and of lateral swinging
cated through the reducing lever 230 to the long
movements about the axis of a rod 62. The
lever 220 and thence to the parallel linkage
actual movement of a point on the rear end of
which is joined to the yoke 24%. The‘mecha 35 the gun will therefore take place along any one
nism just described is, therefore, capable of turn
of a plurality of paths in either direction. Since
ing and tilting the sight 32 so that it is always
these movements are compounded of. movements
parallel to the longitudinal axes of the guns l4
produced in azimuth and movements produced
and H5 and gives the gunner an accurate indica
in elevation, it will be suf?cient to note the
tion of the direction in which they are pointed. 40 operation of either one of these devices. For
In a modi?ed form of the invention illustrated
example, if the control handle 38 is swung about
in Figs. 12 to 15, inclusive, the mechanism for
its vertical axis, its movement will be trans
turning and tilting the gun is exactly the same
mitted through the Bowden wire I44 (Figs. 2
as in the arrangement already described, but the
and 9) to the bell crank I49 which is directly
control handles 25B are here mounted on arms
connected by the link I84 to one end of the follow
262 integral With hangers 2513 for the gun sight
up mechanism exempli?ed by the lever I12. This
32. These hangers also have forwardly extending
movement of one end of the lever H2 produced
arms 268 for a purpose similar to that of the
by the handle will be immediately transmitted to
rigid arms 243. The hangers 264 are pivotal-1y
the valve 153 as the lever swings about the
mounted at vits at the upper ends of the arms of 50 fulcrum provided by the link I14, and the move
a supporting stirrup 2Y8 which is fastened to the
ment transmitted to the valve will cause the
top of a vertical rod 272 and the latter is rotatable
?ow of ?uid under pressure to that end of the
in a bearing 2M attached to the underside of the
?uid motor 'Hl' (Fig. 7) which will cause a swing
partition 24, and has at its lower end an arm
ing movement in a horizontal plane, and in a
216 (Fig. 15) joined by a link 278 to a lever 285 55 direction corresponding to that of the handle
which is pivoted upon the lower end of a bracket
movement, of the guns l4 and IB' about their
282 attached to the partition 2%. At the other
vertical pivots 58 and 62' (Fig. 4) . If the handle,
end of the lever 280, there is attached a Bowden
as viewed in Fig. 2, is moved to the left, for
wire 284 leading to the valve I59 which controls
example, the Bowden wire I41! will be pushed,
the lateral swinging movements of the guns as 60 causing the upper end of the lever H2, as viewed
the gun supports are turned by means of the
in plan in Fig. 9, to be moved to the right. This
power transmitted from the motor "50. An ex
will shift the valve member I65 to the right, in
tension 236 of the bracket 282 provides a sup
port for the sheath 2&2 of the Bowden wire 284.
The stirrup 228 is provided with depending arms
Fig. 10, letting fluid under pressure ?ow through
the port I90 and thence through the connecting
pipe !58 to the right end of the motor 10, thus
290 joined by parallel links 292 to upright links
causing the rear ends of the guns to be swung to
294, the lower ends of which are bolted to a yoke
296 (Fig. 14;) engaging the groove of a spool 25%
(Figs. 12 and 13) slidable vertically on the rod
212. This spool is connected by links 3% to a
forked lever 302 (Figs. 11 and 15), the other end
of which is pivoted on the bracket 282- This
forked lever 302 has a nub smite which is con
nected the upper end of a Bowden wire 3%,
which controls'the valve M0‘ that ‘determines
the left.
i
The speed of this movement will depend upon
the degree of opening of the passage I56 by
the valve member I64 and. this will depend upon
the speed of movement of the control handle 33.
Thus a quick movement of the handle will be
accompanied by a quick operation of the motor
10', and it will be noted that this action takes
place by reason of a direct connection of‘ the
2,409,041
control handle 33 to the valve member. Just as
soon as the motor starts to move, thereby turn
ing the guns, there will be a turning movement
of the arm I16 (Fig. 9) clockwise in this particu~
10
and link means pivoted at one end of said gun
on an axis parallel to and offset with respect to
said ?rst axis, and to said traveler at the other
end, whereby operation of said power means piv
ots said gun in elevation.
2. In a power-operated mount for a gun, a pair
the link I'M upon the follow-up lever I12 and
of
vertical side plates connected to form a frame
tending to swing this lever about its pivotal con»
embracing said gun, means pivoting said gun on
nection to the link I84 in a direction to draw
and within said frame for elevation about a nor
the valve member I84 to the left so as again to
?rst axis, means pivoting said
shut off the supply of pressure ?uid through the 10 mally-horizontal
frame for movement about a normally-vertical
pipe [58 to the motor unless the operator is at
second axis and including a splined shaft aligned
the same time moving the hand lever 38 to the
with said second axis and rigid with said frame,
left to counteract this tendency to close the valve
a traveler surrounding said shaft and engaging
464. In consequence of this arrangement, the
the spline thereof for translation only on and
operator is under no burden of returning the 15 along'said shaft, a link pivoted to said traveler at
control handle to any initial position but moves it
one end and to said gun at the other end, upon
only where he would move it if he were operating
an
axis parallel to and offset from said ?rst axis,
the guns manually. The extent of movement of
a hydraulic motor comprising a cylinder, a pis
the guns accordingly corresponds, either exactly
ton and piston rod, having their axis parallel to
or in a predetermined ratio, to the movement of 20 and offset from said second axis, a guide mounted
the control handle 38. The extent of the angular
for translation on and along said cylinder, a rigid
lar instance, thereby reacting directly through
movement of the gun is the same as the extent
connection between said piston rod and guide,
of angular movement of the control handle. It
an arm ?xed to said guide and extending adja
has already been noted that the speed and direc
cent said traveler, and a swivel connection be
tion of movement of the gun depend upon the 25 tween said arm and traveler, whereby reciproca
speed and direction of movement of the control
tion of said piston, rod, guide, arm and traveler,
handle and, consequently, the direction, speed
pivotally moves the gun in elevation.
and extent of movement of the device are deter
3. The structure as in claim 2, said frame in
mined and controlled directly and continuously
cluding a cap at the top thereof, a second hy
by the direction, speed and extent of movement 30 draulic motor comprising a cylinder, piston and
of the control member, and, even though the
piston rod, adjacent said cap and having its axis
control member 38 is remotely positioned from
normal to said second axis, and a link pivoted to
the device, here the guns, the gunner can with
con?dence initiate the ?ring of the guns at any
time with the assurance that there is no lag
or hunting and that the guns occupy a position
like that occupied by the control member. It
will be observed that the sighting device 32 will
be immediately and correspondingly moved to
bring it into visual alinement with the target.
By reason of the direct connections of the follow
said rod and to said cap, at a point off-set from
said second axis.
ll. In a power-operated mount for twin guns
mounted side by side and adapted for training
and elevation in synchronism, a pair of frames,
each surrounding a respective gun, means mount
mg each gun in its frame for elevation with re
spect thereto about a normally-horizontal ?rst
axis, means mounting each frame for movement
up to the control handle and to the gun, the ex
about a normally-vertical second axis and in
tent of movement of the gun and the speed of
cluding a pair of parallel shafts each co-axial
movement thereof will correspond in a predeter
with a respective second axis, a pair of travelers
45
mined ratio determined by the design of the
each mounted for translation only on and along
follow-up lever to the speed and extent of move
a respective shaft, link means connecting‘ each
ment of the control handle.
traveler with a respective gun, on pivot axes par
In the device illustrated in Figs. 12 to 15, in
allel to and offset fro-m said ?rst axis, a ?rst mo
clusive, where the control handles are directly
tor between and parallel with said shafts and in
connected to the sighting device, any theoretical ’ cluding a cylinder, piston and piston rod, a guide
lag between the movements of the gun and the
mounted for translation on and along said cyl
movements of the handle, so that the bringing
inder and rigidly connected with said piston rod,
of the sighting device into visual alinement with
and a member ?xed to said guide and having
the target will slightly anticipate the movements
oppositely projecting arms each swiveled to a
of the gun, is so slight as to be substantially im
respective one of said travelers, whereby on ap
perceptible to the operator.
plication of hydraulic pressure to said piston,
Having thus described our invention, what we
said rod, member and travelers are reciprocated
claim as new and desire to secure by Letters Pat
ent of the United States is:
as a unit, to synchronously move said guns in
elevation.
1. In a power operated mount for a gun, a pair 60
5. The structure as in claim 4, a link pivoted to
of normally-vertical side plates embracing said
said frames and connecting the same for move
gun and interconnected above and below said
gun to form a frame, means pivoting said gun on
and between said plates for elevation about a
?rst normally-horizontal axis ?xed relatively
thereto, means mounting said frame for pivotal
movement about a second normally-vertical axis
and including a shaft aligned with said second
axis and ?xed to said frame, a traveler guided for
translation only on and along said shaft, motor 70
means connected to so translate said traveler,
ment in unison about said second axis, a second
motor comprising a cylinder, piston and piston
rod, with their axis normally horizontal, and a
direct connection between said last-named pis
ton rod and one of said frames, whereby opera
tion of said second motorrotates said guns in
unison about said second axis.
FRED V. HART.
LAMBERT S. LINDEROTl-I, JR.
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