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June l0, 1947.
J. J. voGT
2,422,056
CLOSURE ACTUATING AND SECURING MECHANISM
'
Filed May e, 1944
‘2 sheets-sheet 1
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INVENTOR.
JOHN J. VOGT
ATTORNEY
June 1.0, 1947.
`
.1. J. voGT
.
_ 2,422,056
CLOSURE >ACTUATING' AND SECURING MEGHANISM
Filed May e, 1944
Y
y2 sheets-Sheet 2
INVENTOR.
.JOHN
J. vosT
A TTOR NE Y
Patented June 10, läd-’7
2,422,056
UNTTED STATES PATENT OFFICE:>
' 2,422,056>
CLOSURE ACTUATIN G AND SECURING
MECHANISM
.lohn J. Vogt, Columbus, Ohio, assignor to
Curtiss-Wright Corporation, a corporation of
Delaware
Application May 6, 19.44, Serial No. 534,493
14 Claims.
1
invention relates to a closure character
ized by features which adapt it particularly, al
though not necessarily, as a wing fold door for
airplanes of the folding wing type.
In a folding wing airplane of the kind wherein
the hingle elements connecting the ñxed and
movable wing panels are located Wholly within
the wing, it is the practice to form openings in
the fixed panel to permit the hinge elements
connecting the latter and the movable panels to
rise above the skin surface of the fixed panel
when the movable panels are folded, these openings being normally closed by doors which are
displaced prior to, or as an incident to, the fold
ing of the movable panels.
One object of the invention is a door of the
character generally described which is automati
(Cl. 244-429)
2
abutting ends of the panels may be connected in
accordance with conventional practice by hinge
elements Il and I8 which are carried Aby termi
nal portions of the beams of the panels. Each
pair of elements may be pivotally connected by
a hingle bolt I9. The latter is located below the
skin surface of the center panel and inboard of
the juncture 2Q (Figure l) of the center and
outer panels.- The loWer portions of the hinge
elements I'I and I8 are formed with holes which
Y are aligned when the outer panel occupies its ex
tended or flight position and through which a
pin 2i (Figure 2) may be inserted to lock the
outer panel extended and from which the pin
may be withdrawn preparatory to the folding of
the panel. The outer panel may be moved to a
folded position by an actuating rod 22, which is
connected to the center panel below the hinge
cally displaced when the movable wing panel
bolt I9, and a suitable hydraulic mechanism (not
with which the door is associated is folded and
which is automatically restored to a closed po~ 20 shown) which is mounted within the outer panel,
the hydraulic mechanism being connected to
sition and secured in such position when the
and acting upon the opposite end of the rod 22
said panel is extended toits flight position.
to cause the outer panel t0 swing upwardly and
A further object is to provide a door which is
inwardly about a hinge axis 23 (Figure 1).
secured in its closed position in such a manner
Referring to Figures 1 and 2, it Will be noted
that it and the mechanism associated with it are 25
that, the hinge elements are Wholly enclosed
held securely against vibration.
within the Wing when the latter is extended, the
A still further object is _a novel design and
hinge axis 23 being located below the upper skin
arrangement oi the parts of the door, whereby to
surface of the Iwing and in inboard relation With
facilitate its installation, render it dependable in
operation and enable compensation to be readily 30 respect to the joint 2D. An opening 24, there
fore, is formed in the skin surface of the center
made for misadjustment and Wearing of the
parts.
The invention is illustrated in the accompany
ing drawings in which:
panel so that the hinge element I8 may move
out of the coniines of the wing and rise above
the skin surface of the center panel as it is moved
The
door I4, in the extended position ofthe outer
panel, provides a portion of the upper skin sur~~
mentary portion of the airplane Wing with which
face of the center panel, being connected to the
4the door is associated.
outer panel by hinges 25.
Figure 2 is a section taken along line 2»-2 of
The invention contemplates the association
Figure 1.
'
'
40
with the door I4 of a mechanism which will au~
Figures 3 and 4 are similar sections, the former
tomatically displace the door from the opening
showing the manner in which the door is elen
2d as the outer panel is folded so that the hinge
vated during the initial part of the folding move
element I8 may rise through said opening and
ment of the movable panel and the latter show
ing the position of the door upon completion of 45 which will automatically restore the door to its
closed position and lock it securely in such po
such movement.
sition as the outer panel is extended and the
Figures 5 and 6 are enlarged fragmentary sec
hinge element I8 returns to its normal position
tions taken along lines 5--5 and 6_6, respectively,
of Figure 2.
within the Wing. To this end, a channel mem
The door, indicated generally at I4, is 111115 50 ber 26 is secured to the underside of the door I4.
trated by way of example in connection with the
At its free end the channel member 26 carries
folding Wing of an airplane, the said wing being
a cross-pin 21 and a slide 28, the latter being en
suiiiciently indicated for the purpose in view by
gageable with, and being adapted to ride over,
a showing of the adjacent ends of the center
the skin surface adjacent the opening 24 as the
panel I5 and one of the outer panels I6. The 55 hinge connection between the outer panel and
Figure l is a top plan view of a door embody
ing the features of the invention and a frag
35 to the folded position shown in Figure 4.
2,422,056
3
the door swings about the hinge axis 23. En~
gagement of the slide 28 with the skin surface is
maintained by a spring 29 which is connected at
one end to a rib member 3B of the outer panel
and at the opp-osite end to a bracket 3| which is
carried by the door adjacent the hinged edge
thereof.
Referring to Figure 2, it will be noted that in
the closed position of the door the cross-pin 21
occupies the inner end of an open-ended slot 32
which is formed by fork-like extensions 33 on a
'4
29 acting upon the door in a direction to main
tain engagement of the slide with the skin sur
face.
When the outer panel is lowered to its extended,
or flight, position, the door Hl is moved sidewise
in the direction of the opening 24, the slide 28
traveling over the skin of the center panel until
it enters the opening. As this occurs, the cross~
pin 2l moves between the fork extensions on the
latch element and engages the end of the slot 32.
Further movement of the door is, therefore, trans
mitted through the cross-pin to the latch ele
latch element 34. A tail-piece 35 on the latter
ment and the latter swings inwardly and down
carries a seat-providing screw 33 which is adjust
wardly about the links 39 and Ml to draw the
able so that the head thereof will engage the
under side of the top wall of the channel member 15 door closed and to load the spring 42. The parts
are so designed that as the outer panel reaches a
26, the said screw being secured in any desired
position of adjustment by a lock nut 3l.
',I‘he
fully~extended position the door firmly engages
the Screw 36. The door is thereby held firmly
against any movement, vibratory or otherwise.
bracket 33 by pairs of links 39 and dû, the bracket
From the foregoing it will be apparent that
in the embodiment of the invention illustrated, 20
when the outer panel is in its extended, or flight,
being carried by a lug 4| which is formed or pro
position, any opening, or vibratory movements of
vided on the hinge element carried by the center
the door I4 will be prevented by the firm engage
panel. The links 33 and ¿l0 will permit a paral
ment of the door with the cross-pin 2T and the
lelogrammatic movement only of the latch ele»
ment, positively resisting any forces acting upon 25 screw 36, Proper cooperation of the cross-pin
latch element is connected to a side wall of a
the latch element which tend to cause the latter
to pivot either upon its connections with the links
with the walls of the slot 32 is readily effected as
the latch element resists torsional forces through
out its range of movement and need not seat upon
39 or upon its connections with the links liti.
the side wall of the bracket, as shown in Figure
The links 39 and 4S connect the latch element 3G
to the bracket 38 in such a manner that in the 30 2, in its locking position. Hence, as the screw 36
normal or locking position of Ithe latch element
shown in Figure 2, those ends of the links which
are connected to the latch element are located
is adjustable, the two points of engagement be»
tween the latch element and the door may be
readily established when the door is installed and
may be readily ree-established from time to time,
slightly below and in an outboard relation with
respect to those ends of the said links which are 35 if required as a result of dislocation or wearing
of the parts.
connected to the bracket 38. In this position of
It will be understood, of course, that the inven
the latch element, the door Ill occupies and is
tion is not necessarily limited to the specific use
locked in a closed position. Any forces acting
illustrated and that the closure may be availed
upon the door in a direction to open it, ten-d to
swing it upon the hinges 25. As the radius about 40 of to equal advantage in connection with various
cooperating pivotally-connected parts wherein
which the cross-pin 21 must swing is much greater
one part is formed with an opening to accommo
than that about which the portion of the channel
date a hinge element or structural element car
member which is engaged by the screw 36 must
ried by the other when one of the parts is folded
swing and as the links 33 and ¿i0 will permit a
with respect to the other.
parallelogrammatic movement only of the latch
I claim as my invention:
element, any opening movement of the door is
1. Mechanism for actuating and securing a
positively resisted. Hence the door remains im
door which is carried by one of a pair of cooper
movable. On the other hand, when the outer
ating, pivotally-connected members and which is
panel is folded the edge of the door which is con
adapted to close an opening in the other of said
nected thereto by the hinges 25 moves upwardly
members, said mechanism including a latch ele
and over the hinge axis, the cross-pin 2l being
ment which is carried by said other of said mem
free to turn in the slot 32 and to move toward
bers and is movable between locking and release
and out the open end thereof. The door may
positions, »and means carried by said door which
swing freely away from the screw 36 under these
is engageable with said latch element when said
conditions and no resistance to such movement
latch element is in said release position and when
is oiîered by the latch element.
said ñrst mentioned member is moved angularly
It will be noted that in the retracted position of
in a predetermined direction with respect to the
the latch element a spring d2, which is connected
other of said members to move said latch element
at one end to the tail-piece 35 and at the oppo
site end to a pin 43 which is carried by the links 60 to said locking position, said latch element draw»
ing said door closed as it is moved to such position.
4D, is held under tension. The spring 42, there
2. Mechanism for actuating and securing a
fore, is operative when the outer panel swings up
door which is ycarried by one of a pair of cooper
wardly about the hinge axis 23 to cause the latch
ating, pivotally-connected members and which is
element to move upwardly and forwardly as
shown in Figures 3 and 4. Thereby the latch 65 adapted to close an opening in the other of said
members, said mechanism including a latch ele
element is operative to partially open the door |11
ment which is carried by said other of said mem
so that it will clear the marginal edges of the
bers and is movable between locking and release
opening 24. When the latch element reaches the
positions, resilient means for biasing said latch
extended position shown in Figure 4, it engages
element toward 'said release position, and means
the lug GI and is arrested. This occurs during
carried by said door which is engageable with
the initial part of the folding movement of the
said latch ’element when >said latch element is in
outer panel. As the latter continues such Inove~
said release position and when said ñrst men
ment the cross-pin 21 moves out of the slot 32
tioned member is moved langu'larly in a prede
and the slide 28 rides up over the marginal edge
of the opening 4 onto the skin surface, the spring
termined direction with respect to the other of
2,422,056
said members to move said latch element to said
locking position against the action of said re
silient means, said latch element drawing said
door closed as it is moved to such position.
3. Mechanism for actuating and securing «a
which is adapted to close an opening in the other
of said members, said mechanism including a
latch element which is carried by the other of
said members and is movable relative thereto
to a release position, said latch element having
door which is hinged to one of a pair of cooper
an end portion which is formed to provide a
catch and having a seat spaced from said end
portion, and means carried by said door which
is engageable with said catch when said latch
ment which is swinglably mounted on the other 10 element is in said release position and when
of said members and is movable between locking
said first mentioned member is moved angularly
and release positions, and means carried by said
in a predetermined direction with respect to the
door which is engageable with said latch element
other of said members to move said latch ele
when said latch element is in said release po'si
ment back into a locking position, said catch
tion and when said íirst mentioned member is 15 drawing said door closed against said seat as
moved angularly in a predetermined direction
said latch element is moved to such position.
with respect to the other of said members to move
8. Mechanism for actuating and securing a
said latch element to said locking position, said
door which is hinged to one of a pair of co
latch element drawing said door closed as it is>
operating, pivotally-connected members and
moved to such position.
which
is adapted to close an opening in the other
20
e. Mechanism for actuating and securing a
of said members, said mechanism including a
door which is hinged to one of :a pair of cooper
latch element movably mounted on the other
ating, pivotally-connected members and which is
of said members, said latch element having an
adapted to close an opening in the other of said
end portion which is formed to provide a catch
members, said mechanism including a latch ele 25 and having a seat spaced from said end por
ment which is swingably mounted on the other
tion, resilient means for moving said latch ele
of said members and is movable between looking
ment relative to the other of said members to
and release positions, resilient means for biasing
a release position, and means carried by said
said latch element toward said release position,
door which is engageable with said catch when
and means carried by said door which is engage 30 said latch element is in said release position
able with said latch element when said latch
and when said first mentioned member is moved
angularly in a predetermined direc-tion with re
element is in said release position and when said
first mentioned member is moved angularly in a
spect to the other of said members to move said
ating, pivotally-connected members and which is
adapted to close an opening in the other of said
members, said mechanism including a latch ele
predetermined direction with respect to the other
latch element back into a locking position’against
of said members to move said latch element to 35 the action of said resilient means, said catch
said locking position against the action of said
resilient means, said latch element drawing said
drawing said door closed against said seat as
_said latch element is moved to such position.
9. Mechanism for actuating and securing a
door closed as it is moved to such position.
5. Mechanism for actuating and securing a
door which is hinged to one of a pair of cooper
door which is hinged to one of a pair of cooper 40 ating, pivotally-connected members and which
ating, pivotally-connected members and which is
is adapted to close an opening in the other of
adapted te close an opening in the other of said
said members, said mechanism including a latch
element which is carried by the other of said
members, said mechanism including a latch ele
ment which is carried by the other- of said mem
members and is movable relative thereto to a
bers and is movable relative thereto to a release - release position, said latch element having an
end portion formed to provide a catch, a seat
position beyond the confines thereof, and means
carried by said latch element in spaced relation
carried by said door which is engageable with
with respect to said catch, said seat being ad
said latch element when said latch element is in
justable as to height, and means carried by said
said release position and when said iirst men
tioned member is moved angularly in a predeter 50 door which is engageable with said catch when
said latch element is in a release position and
mined direction with respect to the other of said
when said i'lrst mentioned member is moved
members to move said latch element back into
angularlyl in a predetermined direction with re
a locking position, said latch element drawing
spect to the other of said members to move said
said door closed as it is moved to such position.
latch element back into a locking position, said
6. Mechanism for actuating and securing a
atch drawing said door closed against said seat
door which is hinged to one of a pair of cooper
as said latch element is moved to such position.
ating, pivotally-connected members and which is
10. Mechanism for actuating and securing a
adapted to close an opening in the other of said
door which is hinged to one of a pair of cooper
members, said mechanism including a latch ele
ment movably mounted on the other of said 60 ating, pivotally-connected members and which
is adapted to close an opening in the other of
members, resilient means for moving said latch
said members, said mechanism including a latch
element to a release position beyond the confines
element movably mounted on said other of said
of said other of said members, and means carried
members, said latch element having an end por
by said door which is engageaible with said latch
tion formed to provide a catch, a seat carried
element when said latch element is in a release
by said latch element in spaced relation with
position and when said first mentioned member
respect to said catch, said seat being adjustable
is moved angularly in a predetermined direction
as to height, resilient means for moving said
with respect to the otherv of said members to
latch element relative to said other of said
move said latch element back into a locking posi
tion against the action of said resilient means, 70 members to a release position, and means carried
by said door which is engageable with said catch
said latch element drawing said door closed ras it
is moved to such position.
'1. Mechanism for actuating and securing a
door` which is hinged to one of a pair of co
operating, pivotally-connected members
when said latch element is in said release posi
tion and when said ñrst mentioned member is
moved angularly in a predetermined direction
and 75 with respect to the other of said members to
2,422,056
move said latch element back `into >a lockingr
said catch, said seat being adjustable as to height,
position.- against the, action of .said` resilient ‘
parallel links for mounting said latch element on
the other of said members, resilient means con
necting certain or" said links to said latch element
lor moving the latter to a release position and
means, said catch drawing said door» closed
against said seat as said latch element is moved
to such position.
11. Mechanism for actuating and securing a
means carried by said door which is engageable
with said catch when said latch element is in said
release 'position and »when said ñrst mentioned
member is moved angularly in a predetermined
direction with respect to the other of said mem
door which is hinged to one of a pair of cooper~`
ating, pivotally-connected fmembers and which
is adapted to close an opening inthe other of
said members, said mechanism including a latch
element, said latch element havingan end por
tion formed to provide a catch, a seat carried
by said latch >element kin spacedrelation with
bers to move said latch element back into a lock
ing position against the action of said resilient
means, said catch drawing said door against said
respect tosaid catch, parallel links for mounting
seat as said latch element is moved to such po
said latch element on the other of said members,
resilient means >for moving said -latch element
to a release position, and means carried by saidV
door which is engageable with said catch when
said latch element is in said release position and
when said first mentioned member is moved an
gularly ina predetermined direction with re
spect to the other of said members to move said
latch element back into a locking position against
the action of said resilient means, said catch
drawing said door closed against said seat -as
said latch element is moved to such position.
12. Mechanism for actuating and securingva
sition.
lll. Mechanism for actuating and securing a
door which is hinged to one of a pair of cooper
ating, pivotally connected members, which is
adapted to close an opening in the other ol said
members, and which is normally biased toward
a closed position, said mechanism including a
latch element, said latch element having an end
ïcrnied- to 1 ovide a catch and having a tail-piece,
a seat carried by said tail-piece in spaced relation
~with respect to said catch, said seat being ad
justable
to height, parallel links for mounting
said latch ele-menton the other of said members,
resilient means connecting certain of said links
to said tail--piece for moving said latch element
to a release position, and means carried by said
door which is engageable with said catch when
said latch element is in said release position and
door which is hinged to one oi a pair oi cooperat
ing, pivotally-connectedmembers and which is
adapted to close an opening in the other of said
members, said mechanism including a latch ele
ment, said latch element having an end portion
when said first mentioned member is moved an
formed to provide a catch, a seat carried by said
gularly in a predetermined direction with respect
latch element in spaced relation with respect to
5to the other of said members to move said latch
said catch, said seat being adjustable as to height,
element back into a locking position against the
parallel links íormounting said latch element on
action of said resilient means, said catch drawing
the other oi saidmembers, resilient means for
said door. closed against said seat as said latch
moving said latch element to a release position,
element is moved to such position.
and means carried by said door which is engage~
JOHN J. VOGT.
able with said catch when saidlatch element is 401
in said release position and whensaid-ñrst men
REFERENCES CITED
tioned member is moved angularly in a predeter
mined direction with respect ,to .the other of said
The following references are of record in the
members'to move said latch element back into
ille of this patent:
a locking` position against the action of said resil~
UNITED STATES PATENTS
ient means, said catch drawing said door closed
Number
Name
Date
against said seatv as said latch element is moved
to such position.>
2,021,324
Osborn ___________ __ Nov, 19, 1935
13. Mechanism foractuating and securing a
door which is hinged to one` of a pair oi cooper
ating, pivotally-connected members and which is
adapted to close anopening in the other oisaid
members, said mechanism including a latch ele
ment, said latch element having an end portion
formed to provide a catch, a seat carried by said
latch element inspaced relation with respect to
2,014,793
Weymouth et al. ____ Sept. 17, 1935
1,691,315
.2,126,727
1,994,334
Van Auken _______ __ Nov. 13, 1928
Brunker __________ __ Aug. 16, 1938
Rush ____________ __ Mar. 19, 1935
755
Number
691,667
FOREIGN PATENTS
Country
Date
Germany _________ __ June 3, 1940
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