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Патент USA US2113910

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April 12, 1938.
4
E. F; ZAPARK'A"
AIRFOIL
Original Filed Dec. 1, 1952
v 2,113,910
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4 Sheets-Sheet 1
April 12, 1938.
E. F. Z'APARKA
2,113,910
AIRFOIL
Original Filed Dec. 1, 1932 '
4 Sheets-Sheet s
April 12, 1938.
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E. F. ZAPARKA
AIRFOIL
originval Filed Dec. 1, 1932
if
/=76.9.
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2,113,910
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V
4 Sheets-Sheet 4
_ 2,113,910
I Patented Apr. 12, 1938
‘UNITED’ STATES
‘PATENT OFFICE‘;
2,113,910
AIRFOIL
' >
. Edward F. Zaparka, Baltimore, MIL, assignor to I
Zap Development Corporation, Baltimore, Md.,
a corporation of Delaware
Application December 1, 1932, Serial No. 645,294
v
Renewed December 9, 1936
(Cl. 244-42)
30 Claims.
Fig. 9 is a top plan view of a modi?cation of
My invention relates to means for increasing
‘the'lift coe?icient of airfoils and to means for
effecting a lateral. control of airplanes.
the flap operating mechanism, part of the wing
structure being broken away.
Fig. 10 is a view taken along the line Ill-Ill
It is an‘ object of my invention to'make more
5 positive and dependable the operation of mech
anisms for increasing the lift coefficient of air
foils.
' of Fig. 9 looking in the direction of the arrows. 5
Fig. 11 is a detail view taken on line Il-II
-
. A‘ further object of my invention is to make the
lateral control of airplanes more de?nite in action
10 and quicker in response to the pilot’s actions.
A still further object of my invention is to ac
complish the above objects with small weight, and
15
of Fig. 9 looking in the direction of the arrows.
Referring to the drawings, I have shown in
Figs. 1 to 4 inclusive and in Fig. '7 one form of
my invention. Referring to Fig. 1 I have shown
an airplane comprising a fuselage I, rear control
surfaces comprising a rudder, a stabilizer and
with a mechanism having few parts which are
elevators which I have generally designated by
easily repaired and replaced.
the numeral 2, and a motor 3.
Looking down on top of the plane, as indicated 15
.
With these and other objects in view, which"
may be incident to my improvements, the inven
tion consists in the parts and combinations to
be hereinafter set forth and claimed, with the
understanding that the several necessary ele
20 ments comprising my invention may be varied in
in Fig. 1, there is a left hand wing II and aright
hand wing 5. There is indicated a pilot seat 6
in the fuselage; The pilot can control the open
ing of the split ?aps by means of a handle ‘I
mounted on a sprocket, not shown,.which drives 20
construction, proportions and arrangement, with
the sprocket chain 8, which in turn drives another .
out departing from the spirit and scope of the ap
sprocket wheel, not shown, mounted on a shaft 9.
Rotation of the shaftil, as will be later de
pended claims.
In order to make my invention more clearly‘ ' scribed, controls the opening and closing of the
understood,
I have shown in the accompanying split ?ap mechanism. In front of the pilot is
25
a control stick II which, upon movement to left
drawings means for carrying-the same into prac
tical effect‘ without limiting the improvements in or right, causes cable I2, which runs to the right
hand wing, to be wound or unwound on a drum
their useful applications to the particular con
I3. Likewise, there is a cable It which is wound
structions, which, for the purpose of explanation,
or unwound on drum I3 by movement of the con 30
30 have been made the subject of illustration.
trol stick I I.
In the drawings:
‘
The cable Id controls the position of'the flaps
Fig. 1 is a top plan view of an airplane equipped
with my inventions, part of the wing and fuselage with respect to the airfoil on the left hand wing
being broken away and positions of some of the
'
35 parts being indicated by dotted lines.
. as the cable I2 controls the position of the flaps
with respect to the airfoil on the right-hand wing.
The mechanism on the left-hand and right
line 2-2 of Fig. 1, looking in the direction of‘ the hand wings is identical. The cables I2 and M, in
accordance with conventional design, pass over
arrows.
Fig. 3 is a detailed sectional view of the mech-' pulleys I5, then over other pulleys not shown,
40 anism shown in Fig. 2 with the split flap mech- 1 and then‘ over pulleys I6. The cables are then ex 40,
tended to pass over pulleys II, the cables'return
anism in open position.
Fig. 4 is a detail view taken on the line 4‘—4 ing and being joined together as indicated at I8.
Upon movement of the control stick II the cables
of Fig. 3, looking in the direction of the arrows.
Fig. 5 is a detail view of the flap mechanism, are made to move in each wing 4 and. 5 in the
45 partly in section, showing a modi?cation of the same direction over the various pulley supports. 40
Fig. 2 is a detailed sectional view taken on the '
?ap operating mechanism, the flaps being shown
in open position.
Fig. 6 is a detail view takenvalong the line 6-4;
of Fig. 5, looking in the direction of the arrows.
The cable I2 is pivotally attached to one end of a
bell crank arm I9 of a bell crank lever which is
pivoted at its middle point at 2|. The bell crank
lever has. another arm 22 which is pivotally at
Fig. '7 is a sectional view taken on the line l-‘I
of Fig. 1, looking in the direction of the arrows.
Fig. 8 is a sectional view similar to Fig. 7 of a
tached to a connecting rod 23 which is pivoted "
at 24 to an operating arm or horn 25 attached to
modi?cation in which the positioning of the upper
?aps with respect to the airfoil is accomplished
by cable control.
I
an upper ?ap 26 of the split ?ap construction.
Upon movement of. the control stick II to
either the left .or right, because of the opposite
pivoting of the bell crank levers, the upper ?aps 55
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2
I
2,113,910‘
26 on either wing are caused to move in opposite . spar 33 is provided with a frustoconical gear
53 which meshes with a frustoconical gear 54
tion at varying angles on the two wings upon carried by the shaft 9.
Upon rotation of the shaft 9 through operation
movement of the control stick | I from its per
pendicular position, as shown in Fig. 1. If the of the handle 1 from the pilot seat, the similar
control stick II is kept in a perpendicular posi-v conical gears 54, w ch engage similar ‘gears 53
?tted at various stations on the wing section,
tion the relative positions of the split ?ap mech
anisms with respect to the air foil'are not changedv cause rotation of the drive shafts 52, and through
~ and the setting of the flap construction on the
the universal connections 5| the operating rods
directions, thus setting the split ?ap construc
'10 right-hand wing 5 will be the same as on the
49 are rotated to move the operating heads 44 to 10
left-hand wing‘ 4. Where, however, it is desir
cause the links 4| and 45 to open or close the
able to effect lateral‘ control, the movement of
the control stick II will enable the pilot to cause
‘split ?aps, as is clearly apparent from Figs. 2
' the lift of one wing to be made relatively greater
or less than that of the other wing.
It is to be noted that each operating arm or
horn 25 is ?xedly fastened to the top of the upper
split ?ap member 26 which is provided with in
terior braces 21 which run between the nose
20 and the trailing edge of the upper ?ap. * There is
a bracing spar 26 at the front of the upper ?ap
and a bracing spar 29 at the trailing edge. ' The
upper ?ap has a support member- 3| at its for
and, 3.
Referring to Fig. 7 it will be seen that the bell
crank levers are pivoted on brackets 55 which are
attached to the front wing spars/'35. This per
mits the bell crank. levers to pivot in a plane ap
proximately parallel to a plane passing through
the wing chords, and the construction is of suffi
cient rigidity to insure easy and positive recipro 20
cation of the connecting rods 23.
In operation let us assume that the control
stick I | is in the position shown in Fig. 1, in which '
ward end which is hinged to support 32, carried ' case by manipulation of the handle ‘I the lower
split ?ap members 36 can be caused to assume
a position such as shown in Fig. '7 or Fig. 3. This
on and'attached to a rear wing spar 33.
25 by the wing proper.v The support 32 is mounted
>The wing is provided} with bracing members 34
which pass from the rearwing spar 33 to a for
ward wing spar 35.
30
-
There is shown a lower ?ap member 36 which
increases the lift and the dragon the wing sec
' tion and the lift coefficient for both airfoils is in
creased. To effect lateral control the control
stick || may be moved from its position shown in
has a front bracing spar 31 and a rear bracing ' Fig. 1 either to the leftor right, in which ‘case
spar 38 and bracing members 39 between the
spars. There is provided a link 4| which is
pivoted at 42 to the upper spar at one end and
f as has its lower end pivoted at .43 to an operating
head 44. Also pivoted at 43 to the operating
head 44 is another link 45. whose other end is
the split ?ap construction on one wing will be
raised or lowered with respect to that of the other
wing.
-
.
Let us assume that the control stick II is moved '
to a position to cause the split flap construction
on'the right wing to be raised. This will tend
pivoted at 46 to the bracing construction 39 of
to decrease the lift coefficient for that wing at
the lower flap member 36. The lower ?ap mem
ber has attached to its forward end a support
member 41 which is pivoted on the support mem
the same time the corresponding flap construction
on the left-hand wing has been lowered, which
ber 32 attached to the airfoil proper;
4
The support furnished through the support
member 3| for the upper split flap member, and
45 the support member 41 for the lower ?ap member
being pivoted to the support 32 of the airfoil
proper, permit the upper and lower ?aps to be
adjusted in unison with respect to the airfoil
willyincrease the lift coef?cient for that wing and
Yawing moments
' thus effect a rolling moment,
are also produced by the drag of the ?aps, which
has an'e?ect on the maneuverability of the ship.
Referring to Fig. 5, I have shown a modi?ca
tion in which the operating rod 49 has its end re
mote from the universal connection 5| journalled
in a bearing block 56 which is attached to the
proper, and at the same time the relative position " ‘bracing member 21 of the upper split flap mem
50 of the upper ?ap and the lower can be regulated
as desired.
.
-
In Fig. 3 the lower ?ap is shown in open posi
tion with respect to the upper ?ap and in Fig. 2
the upper and lower ?aps are shown in their
55
closed position. By moving the operating rod 23
through the bell crank and cable connections
previously described, both ?aps can be moved. ‘
- The operating head 44 has screwthreaded en
the upper split ?ap member 26. The other end of
rod 49 is universally connected at 5| to a drive
shaft 52 which is journalled in the rear spar 33 of
the wing. This universal connection is not de
scribed in detail as it is of the well known type.
The universal connection is located approxi
links 59 are pivoted at their ends 65 to a shaft
66 which passes through the bracing construc
tion 39 of the lower split ?ap member 36. \This
construction is provided with washers 61 and pins
66 to hold the links 59 in operative position.
In the construction shown in Figs. 5 and 6,
upon rotation of the operating rod 49 the operat
ing head 51 is caused to slide along ‘its support
mately in line with the hinging of the split flap
construction to the wing section. In other words,
members.
gagement with the screw threads 48 of an operat
-60 ing rod 49. The forward end of the operating
'05
ber 26. The operating head 51 is provided with
stub shafts 58 to which are pivoted two links 59,
the‘ links being held in position on the stub shafts
58 by washers 6| and pins 62 which pass through
the stub shafts 58. The operating head 51 is
provided with grooves 63 which ?t over slide
members 64 formed on the bracing members 21 of
and the links 59 open and close the split flap
"
,
In Fig. 8 I have shown the uppe'r'?ap member
?ap construction with the airfoil proper will pass 26 provided with an operating arm or horn ‘ll
mounted on the underside of the upper ?ap mem 70
70 approximately through the center of this uni
versal connection 5|. This permits the universal ber and below the operating arm or horn 25.
The ‘operating arm 1| is attached in some suit
connection to operate without catching or bind
a line drawn through the'hinge points of\ the split
ing when‘ the split flap construction is adjusted
able manner to the frontrbracing or spar member
through the movement of the control stick ||.
The drive shaft 52 which is journalled in the rear
tached to the extremities of the operating arms .
26 of the upper split ,wing ?ap member. At
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or horns 25 and ‘H are cables 12 and ‘I3, respec
tively, which pass through apertures into the in
terior of the wingproper and around pulleys ‘I4
and 15, respectively, which are attached to the
"front wingispar 35. One of the cables 12 for
each wing passes over the drum l3 .and the other‘
'10
rotatable operating rod, a universal connection
for the rod at the hinge point, mechanism op-.
erated by said rod for opening and closing the
?aps, said mechanism being ‘without the air
stream over the flap surfaces and means to rotate
sponding wing. This cable construction permits
the operating rod.
the pilot, upon movement of the control stick II,
to change the position of the split ?ap member
with respect to the airfoil proper, as .is accom
and employing a stiff connecting rod 23 instead
of cables;
_
Referring to Fig. 9, I have shown a form of
construction in which the operating links,
adapted to move the lower ?ap with respect to
the upper flap to open and close the split ?ap
construction, are mounted to pivot on axes which
20 are substantially parallel to the longitudinal axis
of the fuselage; in other words, at substantially
right angle to the axes at pivoting of the links
heretofore‘ described. Here the upper ?ap 26 is
controlled as shown in the form of invention
25 illustrated in Figs. 1, 2, 3, 4, 5, and 7-.
The mech
anism, however, for opening and closing the ?aps
‘with respect to each other is, as above indicated,
different.
-
.
Shaft 9, which is caused to rotate through
30 chain and sprocket connections by movement of
the handle ‘I of the pilot, carries a bevel gear 16
which engages the bevel gear 11 rotating drive
shaft 18, thus causing the universal connection
19 to rotate to cause rotation of a shaft 8! which
85 is supported at 82 on the bracing construction of
the upper ?ap member. The shaft 8| carries a
bevel gear 83 which meshes with a bevel gear 84
carried by an operating shaft 85 which is suit
ably journalled, as indicated at stations 86, on
the bracing members of the upper split ?ap mem
40
ber 26.
'
The rod 85 is adapted to be rotated and has, at
suitable stations thereon, screw threaded sections
81 which engage with interior screw threads on
.
ing an airfoil, split ?ap members, both movable
with respect to the airfoil and hinged thereto, a
cable is attached to a similar cable for the corre
plished in the construction previously described
15
3
‘
3. A device of the character described compris
ing, an airfoil, split ?ap members pivotally sup
ported for motion at the rear of the airfoil and
hinged thereto, a rotatable drive shaft, a uni
versal ?exible connection operated by the drive
shaft having universal movement through the
hinge point, and means on the ?ap members with
out the air stream over the ?ap surfaces operated
through the rotation of the ?exible connection
to move the ?ap members relative to each other.
4. A device of the character described compris
ing an airfoil, split flap members, both movable 20
with respect to the airfoil and hinged thereto, a
rotatable operating rod, a universal connection,
forv rotating the operating rod located at the
hinge point, members without the airstream over
the ?ap surfaces operating through said rotation 25
thereof to open and close the flap members, and
a drive shaft connected to the universal con
nection.
.
5. A device of the character described com
prising an airfoil, split ?ap members hingedly 30
attached to said airfoil, both movable with respect
thereto, a stiff connection rod operatively .con
nected to one ?ap, means to reciprocate the rod,
and link members carried by the flap members
for opening and closing the flaps, said link mem~
bers being without the airstream over the ?ap
surfaces.
.
6. A device of the character described com
prising an airfoil, split ?ap members, both mov
able with respect to-the airfoil, a stiff connection 40
rod operatively connected to one ?ap, means to
reciprocate the rod, a rotatable operating rod,
mechanism without the airstream over the ?ap
surfaces operated by said rod for opening and
closing the flap, and means to rotate the op 4.5
erating rod.
'7. A device of the character described com
operating heads 88. The operating heads 88
have pivotally mounted thereon links 89 whose
lower ends are pivoted at-9l to blocks 92 which
are attached by stub shafts 93 to supports 94, prising an airfoil, hinged split ?ap members
suitably mounted on and attached to the lower pivotally supported for motion at the rear of the‘
airfoil, a stiff connection rod operatively con
split
flap member 36.
50
Upon rotation of shaft 9, through the bevel nected to one ?ap, means to reciprocate the rod,
gears 16 and ‘I1 and bevel gears 83 and 84, shaft a rotatable drive shaft, a universal ?exible con
85 is caused to rotate, which moves operating nection operated by the drive shaft, and means
heads 88, and through links 89 the lower?ap is on the ?ap members, operated through the rota
caused to move with respect to the upper flap to tion of the ?exible connection to move the flap 65
members relative to each other, said means being
open or‘ close the split flap construction.
While I have shown and described the preferred without the airstream over the ?ap surfaces.
8. A device of the character described com
embodiment of my invention, I wish it to be
understood that I do not con?ne myself to the prising an airfoil, split ?ap members, both mov- ,
able with respect to the airfoil, a stiff connection 80
60 precise details of construction herein set forth,
by way of illustration, as it is apparent that many rod operatively connected to one ?ap, means to
changes and variations may be made therein, by reciprocate the rod, a rotatable operating rod, a
those skilled in the art, without departing from universal connection for rotating the operating
the spirit of the invention, or exceeding the scope rod, an operating head engaging screw-threads
on said operating rod and movable by rotation 65
of the appended claims.
thereof, links without the airstream over the flap
I claim:
’
surfaces hinged at one end to the upper and lower
l. A device of the character described compris
split
flap members and at their other end- to the
ing an airfoil, split ?ap members hingedly at
tached to said airfoil and both movable with operating head to open and close the ?aps, and
a drive shaft connected to the universal connec-, 70
70 respect thereto, link members Without the air
'
stream over the ?ap surfaces carried by the ?ap tion.
9. A device of the character described compris
members for opening and closing the ?aps, and
ing an airfoil, split ?ap members, both movable
operating means for the links universally con
with respect to the airfoil and hinged thereto,
nected at the point of hinged attachment.
a rotatable operating rod, a universal connection 75
2. A device of the character described compris
2,113,910
for rotating the operating rod located at the hinge
point, an operating head engaging screw-threads
on said operating rod and movable by rotation
thereof, means without the airstream over the
Cl flap surfaces engaging said head to open and close
the ?aps, and a drive shaft connected to the
universal connection.
I
i
-
10. _A device of the character described com
prising an airfoil, split ?ap members, both mov
of rotation of said hinged'connections, and means
to move the movable pivot to open and close the
flaps.
.
~
16. A device of the character described com
prising an. airfoil, split ?ap members, bothv mov
able with respect to the airfoil and having a
, hinged connection therewith, a; rotatable operat-,
ing rod, a universal connection for rotation of
the operating rod, a link fixed to a ?xed pivot on
10 able with respect to the airfoil and hinged thereto, ~ one ?ap, a movable pivot for‘ the other end of
a rotatable operating rod, a universal connection
.the link adapted to move on rotation of the
1,0
for rotating the operating rod located‘ at the‘ operating rod in ‘a direction ‘substantially perpen
hinge point, an operating head engaging screw
threads on said operating rod and movable by
rotation thereof, links without the airstream over
the flap surfaces hinged at one end to the upper
and lower split flap members and at their other
ends to the operating head to open and close the
flaps,-and a drive shaft connected to the universal
20
connection.
_
11. A device of the character described com
prising an airfoil, split ?ap members, both mov
.'. able with respect to the airfoiLa sti?' connection
rod operatively connected to one ?ap, means to
reciprocate the rod, a rotatable operating rod, a
universal connection for rotating the operating
, rod, an operating head engaging screw threads on
said operating rod and movable by rotation
thereof, links without the airstream over the ?ap
30 surfaces hinged at one end to the upper and lowerv
split ?ap members and at their other end to the
operating head to open and close the ?aps, and
a drive shaft connected to the universal connec
.
tion.
12. A device of the character described com
prising an airfoil, split ?ap members, both mov
able with respect to the airfoil, a rotatable oper
ating rod supportedby and movable with the
upper ?ap only, a universal connection for oper
40
ating the rotating rod, members operating
through said rotation thereof to openand ‘close
the ?ap members, and a drive shaft connected to
the universal connection.
13. A device of the character described com
prising an airfoil, split ?ap members,_both movi
able with respect to the airfoil, a rotatable oper
ating rod supported by and movable withnthe
upper ‘?ap only, a universal connection for rota
tion of the operating rod, an operating head en
' gaging screw threads on said operating rod and
movable by rotation thereof, means engaging
said head to open and close the flaps, and a drive
shaft connected to the universal connection.
14. A device of the character described coni
prising an airfoil, split ?ap members, both movable with respect to the airfoil, a rotatable oper
ating rod supported by and movable with the
upper flap only, a universal connection for rota~
tion of the operating rod, an operating head en
gaging screw threads on said operating rod and
movable by rotation thereof, a link pivoted to the
lower flap at one end and to the operating head
at the other to open and close the ?ap on rota
tion of the operating rod, and a drive shaft con
nected to the‘ universal connection to rotate the
operating rod.
I
_
,
vl5. A device of the character described com
prising an airfoil, split ?ap members, both mov
able with respect to the airfoil and havingv hinged
70 connection therewith, means to move ‘both ?ap
members with respect to the ‘airfoil, a link ?xed
to a ?xed pivot on one ?ap, a movable pivot for
the other end of the link on the other ?ap, said
movable pivot being capable of movement in a
direction substantially perpendicular to the axis
dicular to the axis of rotation of said hinge
connections‘ to open and close the ?aps.
‘
17. A device of the character described com- 7
prising an airfoil, split ?ap members hingedly
attached to said airfoil and both movable with
respect thereto, a stiff connection rod operatively
connected to one ?ap, a bell crank lever having
one of its ends connected to one end of the con’
nection rod, means to rotate the bell crank lever
to reciprocate the connection rod, and link mem
bers carried by the ?ap members without the
airstream over the flap surfaces for opening and
closing the flaps.
'
18.‘A device of the character described com-'
prising an airfoil, split ?ap members hingedly
attached to said airfoil, both movable with re
spect thereto, a sti? connection rod operatively
connected to one ‘flap, a bell crank lever having
one of its ends connected to one end of the con
nection rod, means to rotate the bell (crank lever
to reciprocate the connection rod, a'rotatable
operating rod, a universal connection for rotat
ing the operating rod, members without the air
stream over the ?ap surfaces operating through
said rotation thereof to open and close the ?ap
members, and a drive shaft connected to the
universal connection.
'
19. A device of the" character described‘ com
prising an airfoil, split ?ap members pivotally
connected to and movable with respect to the air
foil, upper and lower operating arms attached to
one of the ?ap members, cables attached to the
arms to operate said ?ap member, a rotatable op
erating rod, a universal connection for rotation ‘
of the operating rod, means without the airstream
, over the flap surfaces operating through said ro—
tation thereof to open and close the ?ap mem
bers, and a drive shaft connected to the universal
connection.
'
20. Av device ‘of the character described com
prising an airfoil, split flap members hingedly
attached to said airfoil, both movable with respect
, thereto, a stiff connection rod operatively con
nected to one flap, a bell crank lever having one 55
of its ends connected to one end of the connec
' tion’ rod, means torotate the bell crank lever to
reciprocate the connection rod, a rotatable oper
ating rod, a universal connection for rotation of 60
the operating rod, an'operating head engaging
screw threads on said operating rod and‘ movable
by rotation thereof, means without the airstream
over the ‘flap surfaces engaging said operating
head to open and close the flaps, and a drive
shaft connected to the universal connection.
21. A device of the character described com-
prising an airfoil, split ?ap members pivotally
connected to and movable with respect to the air
foil, upper and lower operating arms attached to
one of the flap members, cables attached to the
arms to operate said flap member, a rotatable
operating rod, a universal connection for opera
tion of the operating rod,.an operating head en
gaging the screw threads on said operating rod,
2,118,910
and movable by rotation thereof, means without
the airstream over the flap surfaces engaging
said operating head to open and close the ?ap .
and a drive shaft connected to the universal con
nection.
'
22. A device of the characterdescribed com
prising an airfoil, split flap members, both mov
able with respect to the airfoil and having hinged
connection therewith, means to move both ?ap
members with respect to the airfoil, a link ?xed
to a ?xed pivot on one ?ap, a movable pivot for
the ‘other end of the ?ap carried by the other ?ap,
a rotating operating rod, a universal connection
for rotation of the operating rod, means operat-‘
ing through said rotation thereof to move the
movable pivot in a direction substantially par
allel to the axis of rotation of said hinged con
nection to open and close the ?aps, and a drive
shaft connected to the universal connection.‘
23; A device of the character described com
prising an airfoil, split ?ap members, both mov
able with respect to the airfoil and having a
' hinged connection therewith, means to move both
?ap members with respect to the airfoil, a link
?xed to a ?xed pivot on one ?ap, an operating
so
head to which the other end of the link is piv
oted, an operating rod carried by the upper ?ap
having ‘screw threaded engagement with said op
erating head, and a drive shaft connected to the
universal connection for rotating the operating
rod to move the operating head and open and
close the ?aps.
_
24. A device of the character described, com
prising an airfoil ‘and ?ap adapted to be moved
below the airfoil and hinged thereto, a rotatable
operating rod, a universal connection for the rod
at the hinge point, mechanism without the air
stream over the fiap surfaces operated by said
rod for moving the ?ap on its hinge point, and
40 means to rotate the operating rod,
-
25. A device of the character described,.com
prising an airfoil, a ?ap supported for movement
below the airfoil and hinged thereto, a rotatable
drive shaft, a ?exible connection operated by the
drive shaft, having universal movement through
the hinge point,and means without the airstream
over the ?ap surfaces on the ?ap member oper
ated through the rotation of the ?exible connec
‘ tion to move the ?ap up and down._'
.
'5
with‘ respect to the ?ap, an operating-‘head for '
movement on the rod, and a link without the
airstream over the ?ap surfaces joining the op
erating head and the ?ap whereby the v?ap may
be moved upwardly and downwardly.
2'7. A device of the character described, com
prising an airfoil, a ?ap adapted to be moved‘
below the airfoil and hinged thereto, a'rotatable '
operating rod, a universal connection for the rod
at the hinge point, a ?xed pivot on the ?ap, a link 10
substantially without ‘the airstream over the flap‘
surfaces pivoted on said ?xed pivot, means moved
by the operating rod to cause the link to raise and
lower the flap, and means to rotate the operat
ing rod.-
'
'
v‘
15
28., A device of the character described, com
prising an airfoil, a ?ap supportedfor movement
below the airfoil and hinged thereto, a rotatable
drive shaft, 8. ?exible connection operated by the
drive shaft having universal movement through
the hinge point, an operating rod driven through
said ?exible connection, an operating head on
the rod, toggle links substantially without the air
stream over the ?ap surfaces pivoted on the op
erating head, atleast onev of which is pivoted ‘to
the ?ap to move the flap into raised and lowered
positions.
‘
29. A device of the character described com
prising an airfoil, a ?ap located near the rear of
the airfoil for movement below the airfoil, a ro- ,
tatable operating rod which may be held ?xed
with respect to the ?ap, a hinged connection for
the ?ap near its front edge, an operating head
for movement on the operating rod, a link for
movement on the operating rod toward and from 3.“,
the hinged connection for the ?ap, and a link
without the airstream over the ?ap surface join
ing the operating head and the ?ap whereby the
flap may be moved upwardly and downwardly.
30. A device of the character described com
prising an airfoil, a ?ap located near the rear of
the airfoil for movement below the airfoil, a
hinged connection for the ?ap upon which it piv
ots, a rotatable operating rod which may be held
?xed with respect to the ?ap, an operating head
for movement on the rod in a direction substan-.
tially parallel tow the axis of rotation of the flap
about its hinged connection, and a link without
the airstream over the ?ap surface joining the
operating head and the ?ap whereby the ?ap may ,
26. A device of the character described, com ' be moved upwardly and downwardly.
prising an airfoil, a ?ap located near the rear of
the airfoil for movement below the airfoil, a ro
EDWARD F, ZAPARKA.
tatable operating rod which may be held ?xed
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