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Патент USA US2406073

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Aug, 20, 1946.
s. GRISWOLD a-r'm.
2,405,073
FORCE AND MOTION TRANSMITTING MECHANISM
Filed Feb. 1,1944,
2 Sheets—$heet l
INVENTOR.
GALE GR/SWOLD
CHARLES H. CANNON JR.
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1
BY
38
29
’
ATTORNEY
-
'Aug- 2,0, 1946-
e. GRISWOLD arm.
2,406,073
FORCE AND MOTION TRANSMITTING MECHANISM
Filed Feb. 1,‘ 1944
2 Shéets-Shee'c 2
INVENTOR.
GALE GRISWOLD
CHARLES H. CANNON JR.‘
BY
,; ----- - "A
ATTORNEY
>
'
49
Patented Aug. 20, 1946
2,406,073
UNITED STATES PATENT OFFICE
2,406,073
FORCE AND MOTION TRANSMITTING
MECHANISM
Gale Griswold and Charles H. Cannon, Jr., Colum
bus, Ohio, assignors to Curtiss-Wright Corpo
ration, a corporation of Delaware
Application February 1, 1944, Serial No. 520,702
10 Claims. (Cl. 244—49)
1
2
Figure 1 in which the skin surface of the wing
has been removed.
Figure 6 is a fragmentary transverse section
is concerned with, although not necessarily lim
taken along line 6—-6 of Figure 5.
ited to, a mechanism for transmitting the move
Figure 7 is a fragmentary spanwise section
ment of the control stick of an airplane of the
.taken along line 1—-1 of Figure 5.
folding wing type to the aileron or other auxiliary
The mechanism, indicated generally at It) in
airfoils associated with those sections of the wing
Figure l, is illustrated in connection with an air
which may be folded and extended as circum
stances require.
plane which is sufficiently indicated for the pur
One object of the invention is to provide a 10 pose in View by a showing of the portside of a
wing ll of cantilever design. The center section
mechanism which will permit folding of the wing
of the wing, the section to which the fuselage is
of the airplane with which it is associated in any
position of adjustment of the auxiliary airfoils
attached, is indicated at l2 and an outer section
at I3, the latter carrying the usual aileron l4.
carried by the movable wing sections, thereby
avoiding the necessity of special adjustments to 15 Hinges, the locations of which are indicated at l5
the airfoils prior to the folding of the wing, and
and [6, connect the outer wing section to the cen
ter section so that it may be pivoted upwardly
hence eliminating any possibility of damage to
about a hinge axis I‘! to a folded position, the
the mechanism by reason of a failure to make
such adjustments.
joint between the center and outer wing sections
A further object is to provide a mechanism 20 being indicated at l8.
which is readily adaptable to various types and
As is customary, the movements of the aileron _
designs of airfoils.
are effected by the control stick of the airplane,
A still further object is a mechanism wherein
the movements of the control stick being trans
provision is made for maintaining a solid con
mitted to the mechanism In by a push-pull tube
nection at all times between the control stick and 26 l9 (Figure 5) and by the said mechanism to the
aileron by a push-pull tube 20, it being under
the auxiliary airfoils whether the wing be folded
or extended, this object contemplating a mech
stood, of course, that the tubes l 9 and 20 may, in
This invention relates to force and motion
transmitting mechanisms and more particularly
anism wherein the use of ?exible control cables
accordance with conventional practice, be con
is eliminated and wherein adjustments may be
nected to the control stick and aileron, respec
made with facility to compensate for variations 30 tively, by any suitable number of similar, serially
in the dimensions of the parts of the mechanism.
connected tubes or rods.
'
A still further object is to provide a mechanism
In accordance with the invention the outer end
which is simple in design, dependable in opera
of the tube I9 is pivotally connected to the outer
end of one arm of a bellcrank 2| (Figure 5) which
tion and wherein play or lost motion between the
35 is mounted by brackets 22 upon a longitudinally
parts is reduced to a minimum.
extending structural member 23 of the wing sec
The invention is illustrated in the accompany
tion I2. The outer end of the other arm of the
ing drawings, in which:
Figure 1 is a top plan view of a portion of an
airplane wing in which the features of the in
vention are incorporated.
bellcrank 2| is connected by a link 24 to one end
of a lever 25. The latter is pivotally mounted
intermediate its ends upon a bracket 28 which is
carried by a transverse structural member 21 and,
Figure 2 is an enlarged fragmentary perspec
at its opposite end is pivotally connected to one
tive view from the under side of the wing at the
end of a swivel 28. The opposite end of the said
juncture of the ?xed center section and the outer
swivel is formed, or provided, with a lateral ex
movable section and illustrates the relative posi 45 tension 29 to which one end of a lever 30 is piv
tions of the parts of the mechanism when the
otally connected. The lever 30 is pivotally con
movable section occupies its extended position.
nected intermediate its ends to a bracket 3|, the
Figure 3 is a detail view, partially in section and
latter being mounted by a spacer 32 upon a trans
partially in elevation, of the swivel of the mech
verse structural member 33. The other end of
anism.
50 the lever 30 is connected by a link 34 to the outer
Figure 4 is a generally similar view of a modi
?ed form of swivel.
Figure 5 is an enlarged fragmentary view in
plan of that portion of the control mechanism
which is indicated generally within the area in 55
end of one arm of a bellcrank 35 which is mount
ed by brackets 36 upon a structural member 31
of the wing section 13, the outer end of the other
arm of the bellcrank 35 being connected to the
inner end of the tube 20.
2,406,073
3
It will be noted, referring to Figure 5, that the
small in magnitude with relation to the axial
tubes I9 and 20 are aligned and that longitudinal
movements and do not impair or prevent func
tioning of the mechanism in the manner desired.
rocks the bellcrank 2| in a clockwise direction,
The links 24 and 34 may, as illustrated, be in
this movement of the tube l9 being transmitted 5 the form of turnbuckles in order to enable their
length to be adjusted as may be necessary to
by the said bellcrank and. the link 24 to the lever
movement of the former in an outboard direction
25. The resultant angular movement of the lat
ter moves the swivel 28 in an aft direction to
compensate for slight variations in the dimen
sions and locations of the parts.
thereby rock the lever 30 in the same direction
From the foregoing it will be apparent that
as the lever 25 to cause the bellcrank 35 also to 10 the mechanism described has the advantage that
rock in a clockwise direction. When the tube I9
a solid connection between the control stick and
is moved in an inboard direction the bellcranks,
the auxiliary airfoil is maintained at all times,
links, levers and swivel cause the rod 20 to move
the airfoil section which carries said auxiliary
in an inboard direction. In other words any
airfoil being freely movable to folded and ex
movement of the tube I9 is transmitted to the 15 tended positions without possibility of damaging
tube 20 so that the latter moves in the same di
the mechanism regardless of the position of the
rection and to substantially the same degree as
auxiliary airfoil at such time. Further advan
the former.
tages obtained are that the use of ?exible cables
The mechanism I0 is so designed that the axis
in the control system, and the complicated take
of the swivel is substantially coincident with the 20 up arrangement necessary when such cables are
hinge axis [1, the said swivel, as best shown in
employed, are avoided.
Figure 6, forming one side of a parallelogram,
A modi?ed form of swivel is illustrated in Fig
the two levers 25 and 30 forming two of the other
ure 4. In this embodiment, the shank 38 is
sides of the parallelogram while the fourth side
journaled in a sleeve 39 which is externally
is formed by the link 24. The lever 25 is mount 25 threaded so that it may be screwed into a thread
ed inboard with respect to the hinge axis I‘! while
ed bore in the part which carries the lateral ex
the lever 30 is mounted in outboard relation with
tension 29. The sleeve 39, therefore, may be ad
respect to the said axis. Upwardly of their piv
justed to lengthen or shorten the swivel as may
otal connections with the brackets 26 and 31,
be necessary to properly connect the levers 25
however, the said levers extend angularly in the 30 and 30, a lock nut 40 being provided to secure
direction of the hinge axis, the axis of the piv
the parts against relative axial movement when
otal connection of the lever 25 with the swivel
such adjustment has been made. The modi?ed
28 intersecting the hinge axis and in turn being
swivel described has the advantage that it avoids
intersected by the axis of the swivel. The pivotal
the necessity of adjusting the length of the links
connection of the lever 30 with the swivel is, on 35 24 and 34 in the manner and for the purpose
the other hand, located in outboard relation with
heretofore described, and hence makes it unnec
respect to the hinge axis.
essary that such links be in the form of turn
When the tube I9 is actuated to elevate or
buckles.
lower the aileron I4, the resultant movement of
Although the mechanism is illustrated and de
the bellcrank, link and lever assembly carried 40 scribed in connection with the control of the
by .the wing section I2 is transmitted to the simi
ailerons of an airplane, it will be understood, of
lar assembly carried by the wing section l3
course, that this is intended by way of example
through the agency of the swivel 28, the latter
only, as the features of the invention may be
being caused to move axially along the hinge axis
availed of to equal advantage for transmitting
I6. As this occurs, there will, of course, be a 45 forces and motions between control and con
slight lateral displacement of the swivel with re
trolled devices designed for various purposes.
spect ‘to the hinge axis as a result of the arcuate
We claim as our invention:
paths traversed by the ends of the levers 25 and
1. The combination with cooperating mem
30.
bers, one of which is connected to the other for
. Referring to Figures 3 and 5, it will be noted 50 pivotal movement about a predetermined axis, of
that the end of the swivel to which the lever 25
a pivotally mounted lever carried by one of said
is connected is formed with a shank 38 which is
members and having a predetermined range of
journaled for turning movement in the part of
movement, means carried by said last mentioned
member for actuating said lever, a pivotally
the swivel which carries the lateral extension 29.
This is to the end that when the outer wing sec 55 mounted lever carried by the other of said mem
tion is folded upwardly to a retracted position,
bers, means carried by said last mentioned mem
or lowered from such position to an extended po
ber which is adapted to be actuated by said last
mentioned lever, and a swivel connecting said
sition, one part of the swivel may turn with re
levers, the axis of said swivel being and remain
spect to the other; and as the swivel always oc
cupies a position in which its axis is substantially 60 ing substantially coincident with said first men
tioned axis throughout said range of movement
coincident with the hinge axis l1 regardless of
but moving to a substantial extent in an axial di
the position in which it may be held by the con
rection in moving through said range of move
trol lever, the elevating and lowering movements
ment.
of the outer wing section may be effected with
2. The combination with cooperating members,
out regard to the position occupied by the aileron, 65
one of which is connected to the other for piv
and hence without the necessity of ?rst adjusting
otal movement about a predetermined axis, of a
the aileron, or associated parts to any particular
pivotally mounted lever carried by one of said
predetermined positions. In the event that the
members and having a predetedmined range of
axis of the swivel 28 is, for the reason noted,
offset slightly with respect to the hinge axis 70 movement, an elongated, longitudinally movable
element carried by said last mentioned member
when the wing section I3 is folded, the end of
for actuating said lever, a pivotally mounted lever
the swivel to which the lever 30 is connected will
swing slightly about the connection between the
carried by the other of said members, means car
ried by said last mentioned member which is
lever 25 and the opposite end of the swivel.
Such movements of the swivel, however, are 75 adapted to be actuated by said last mentioned
.1
i.
2,406,073
5
6
lever, and a swivel connecting said levers, the axis
of said swivel being and remaining substantially
said bellcrank, said lever, bellcrank, link and
means being carried by said ?rst mentioned air
coincident with said ?rst mentioned axis through
out said’range of movement but moving to a sub
stantial extent in an axial direction in moving
foil section, a second pivotally mounted lever, a
second bellcrank, a second link connecting said
second bellcrank and said second lever, means
which is adapted to be actuated by said second
through said range of movement.
'
3. The combination with‘ cooperating members,
one of which is connected to the other for piv
bellcrank, said second lever, second bellcrank,
second link and said last mentioned means being
otal movement about a predetermined axis, of a
carried by said second airfoil section, and a swivel
connecting said levers, the axis of said swivel
lever pivotally supported by one of said members
being and remaining substantially coincident with
atone side of said axis, said lever having a pre
said ?rst mentioned axis throughout said range
determined range of movement, means carried by
of movement but moving to a substantial extent
said last mentioned member for actuating said
in an axia1 direction in moving through said
lever, a lever pivotally supported by the other of
range of movement.
said members at the opposite side of said axis,
'7. Mechanism for transmitting motion to a
means carried by said last mentioned member
control surface on the foldable portion of a fold
which is adapted to be actuated by said last
ing wing airplane, comprising a ?rst lever mount
mentioned lever, said levers having ends which
ed on the ?xed portion of the airplane wing and
extend angularly toward said axis in spaced rela
tion with respect to one another, and a swivel 20 so pivoted that one end portion thereof may
swing substantially in a plane containing the
connecting said levers, the axis of said swivel be
folding axis of the airplane wing and in a gen
ing and remaining substantially coincident with
said ?rst mentioned axis throughout said range
erally axial direction, a second lever mounted on
the foldable portion of the airplane wing and
of movement but moving to a substantial extent
in an axial direction in moving through said 25 so pivoted that one end portion thereof may swing
substantially in a plane containing the folding
range of movement.
axis of the airplane wing and in a generally ax
4. The combination with cooperating members,
one of which is pivotoally connected to the other
ial direction, a swivel connection between said
end portions of said ?rst and second levers, said
for pivotal movement about a predetermined axis,
of a pivotoally mounted lever, said lever having 30 swivel connection lying substantially on said fold
ing axis, means for actuating said ?rst lever,
a predetermined range of movement, a bellcrank,
and control surface operating means actuated by
a link connecting said bellcrank and said lever,
said second lever.
means for actuating said bellcrank, said lever,
8. Mechanism for transmitting motion to a
bellcrank, link and means being carried by one
of said members, a second pivotally mounted 35 control surface on the foldable portion of a fold
ing wing airplane, comprising a ?rst lever mount
lever, a second bellcrank, a second link connect
ed on the ?xed portion of the airplane wing and
ing said second bellcrank and said second lever,
pivoted to swing about an axis lying in a plane
means which‘ is adapted to be actuated by said
substantially normal to the folding axis of the
second bellcrank, said second lever, second b‘ell
crank, second link and last mentioned means be 40 airplane wing, a second lever pivoted to swing
about an axis lying in a plane substantially nor
ing carried by the other of said members, and a
mal to the folding axis of the airplane wing, a
swivel connecting said levers, the axis of said
swivel being and remaining substantially coinci
swivel connection between said ?rst and second
levers, said swivel connection lying substantially
dent with said ?rst mentioned axis throughout
on said folding axis, means for actuating said
said range of movement but moving to a substan
tial extent in an axial direction in moving
?rst lever, and control surface operating means
through said range of movement.
actuated by said second lever.
5. In a folding airfoil, mechanism for transmit
ting push-pull forces and motions from one air
foil section to a second airfoil section which is
connected to the ?rst mentioned section for piv
otal movement about a predetermined axis, said
mechanism including a pivotally mounted lever
carried by said ?rst mentioned airfoil section and
having a predetermined range of movement,
means carried by said ?rst mentioned airfoil sec
tion for actuating said lever, a pivotally mounted
lever carried by said second airfoil section, means
carried by said second airfoil section which is
adapted to be actuated by said last mentioned le
ver, and a swivel connecting said levers, the axis
of said swivel being and remaining substantially
coincident with said ?rst mentioned axis through
out said range of movement but moving to a sub
stantial extent in an axial direction in moving
through said range of movement.
6. In a folding airfoil, mechanism for trans
mitting push-pull forces and motions from one
airfoil section to a second airfoi1 section which
is connected to said ?rst mentioned airfoil sec
tion for pivotal movement about a predetermined
axis, said mechanism including a pivotally‘
mounted lever, said lever having a predetermined
range of movement, a bellcrank, a link connect
ing said bellcrank and lever, means for actuating
9. Mechanism for transmitting motion to a
control surface on the foldable portion of a
folding wing airplane, comprising a ?rst lever
mounted on the ?xed portion of the airplane
wing and so pivoted that one end portion thereof
may swing substantially in a plane containing
the folding axis of the airplane wing and in a
55 generally axial direction, a bellcrank, a link
connecting said bellcrank and said ?rst lever,
means for actuating said bellcrank, said lever,
bellcrank, link and actuating means being car
ried by the ?xed portion of the airplane, a sec
60 ond lever so pivoted that one end portion thereof
may swing substantially in a plane containing
the folding axis of the airplane wing and in a
generally axial direction, a second bellcrank, a
second link connecting said second bellcrank, a
said second lever, means which is adapted to be
actuated by said second bellcrank, said second
lever, said second bellcrank, said second link and
said actuated means being carried by the fold—
able portion of the airplane wing, and a swivel
70 connection between said end portions of said
?rst and second levers, said swivel connection 1y
ing substantially on said folding axis.
10. Mechanism for transmitting motion to a
control surface on the foldable portion of a fold
75 ing wing airplane, comprising a ?rst lever mount
2,406,073
7
8
ed on the ?xed portion of the airplane wing and
pivoted to swing about an axis lying in a plane
substantially normal to the folding axis of the
airplane wing, a bellcrank, a link connecting said
connecting said second bellcrank and said sec
ond lever, means which is adapted to be actu
ated by said second bellcrank, said second lever,
said second vbellcrank, said second link and said
bellcrank and said ?rst lever, means for actu 5 actuated means being carried by the foldable por
tion of the airplane wing, and a swivel connection
ating said bellcrank, said lever, bellcrank, link
and actuating means being carried by the ?xed
between said first and second levers, said swivel
connection lying substantially on said folding axis.
portion of the airplane wing, a second lever piv
oted to swing about an axis lying in a plane sub
stantially normal to the folding axis of the air 10
plane wing, a second bellcrank, a second link
GALE GRISWOLD.
CHARLES H. CANNON, JR.
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