US1304420A

US1304420A - verner

Info

Publication number: US1304420A
Authority: US
Publication date: 1919-05-20
Anticipated expiration: 1936-05-20

Description

J. F. VERNER.

AEHOPLANE CUNTHOL,

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UNITED STATES PATENT OFFICE.

JAMES FREDERICK VERN'ER, OF TORONTO, ONTARIO, CANADA, ASSIGNOR TO HERMAN CLARK ANDERSON, 0F TORONTO, ONTARIO, CANADA.

AEROPLANE CONTROL.

Application led August 30, 1918.

To all '1U/1.0m t may concern.'

Be it known that I, JAMEs FREDERICK VERNER, of the city of Toronto, in the county of York, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Aeroplane Controls, of which the following is the specification.

My invention relates to improvements in aeroplane controls and the object of the invention is to devise means whereby one coutrol, either front or rear. may be rendered operative or inoperative by the other control operator and to produce this result without the employment of other cable connections than those ordinarily used in an aeroplane and it consists essentially of the following arrangement and construction of parts as hereinafter more particularly explained.

Figurel, is a general perspective view of my devicei.

Fig. 2, is an enlarged perspective detail of the principal parts of my operating mechanism, such mechanism being broken away intermediately of its length, the parts being in section.

Fig. 3 is a sectional detail of the plunger' and operating mechanism adjacent thereto for connecting and disconnecting the stick or hand control lever.

Fig. 4, is an enlarged sectional view of the upper portion of the supplemental lever for breaking the controls.

Fig. 5, is a plan view of one of the foot control levers.

In the drawings like characters of reference indicate corresponding parts in the various figures.

1 and 2 indicate front and rear bearing brackets suitably secured to the bottom of the fuselage and 20 an intermediate bracket. 3 indicates a rocking shaft 'ournaled in the bearings l, 2 and 2. 4 in icates the front manually operated control lever which is swung at its lower end upon the forward end of the rocking shaft 3. 5 indicates the rear manually operated control lever which is swung at its lower end upon the rear end of the rocking shaft 3. Each lever 4 and 5 is broken intermediately of its length, the lower portions being provided with tubular portions 4* and 5* formed integral with the forks 4 and 5. 6 indicates a socket member provided with a depending tubular portion 6*, a socket portion 6 and tubular por` Specification of Letters Patent.

Patented May20, 1919.

Serial No. 252,078.

tion (5K being provided for each front and rear lever, a tubular portion 6* fitting into each of the tubularg portions 4* and 5x and suitably secured therein. Each of the portions 4 and 5* is provided with a closure member 62 (sce Fig. 3) provided with a central orifice 63. T indicates a plunger provided with an enlargement 7* fitting freely the tubular portion 6* of each socket member. 8 indicates a compression spring eX- tending between such enlargement and the closure member 62. The lower end of thc plunger 7 is provided with a longitudinal slot 7. Each control lever 4 and 5 fits into a sleeve member 9 and is suitably secured therein. Each sleeve member 9 is provided with a depending stem 10 terminating in a ball 11 which iits into the socket 6. 12 indicates a ring cap which fits over the upper portion of the ball l1 and has a screw connection or other suitable means for securing it to the socket 6 so as to hold the ball 1l freel i within the socket. 11 indites a recess ormed in each ball 11 diametrically opposite the stem l() and into which the plunger 7 lits when either lever 4 or 5 is in its neutral position.

18 indicates a bracket carried by the lower portion of the lever 5 and 19 indicates a similar bracket carried by the lower portion ot' the lever i, both of such brackets being` carried in front of its respective lever 4 or 5. The

brackets

18 and 19 extend upwardly and are formed into V-shaped heads 18* and 19x carrying arc-shaped guides 2() and 21, each provided with ratchet notches 22. 23 and 24 indicate levers which are journaled in the apexes of the bracket heads 18 and 19x and extend upwardly through the guides 2O and 21. The lower ends of the

levers

23 and 24 are provided with

stems

25 and 26 from which extend

arms

27 and 28. 29 and 2.9x indicate cylindrical bearings carried by the portions 4X and 5", each bearing being pr vided with an open front 29".

30 indicates a vertically movable rod held in the bearing sleeve 29. 3() indicates a vertically movable rod held in the bearing sleeve 29". The upper end of the rod 30 is provided with jaws 28. connected by a link rod 282. to the end of the arm 28. The upper end of the rod 3()X is provided with jaws 29 connected by a link rod 292 to the arm 27. Each

rod

30 and 30* is provided with a longitudinal slot 27* for' a purpose which will hereinafter appear,y opposite the open face 29" of the bearing lJeeves 29 and 29. 31 indicates a link rod provided with forked ends 32 and 33 pivotally connected to the lower portions 4* and 5* of the levers 4 and 5. The lower portion 5* of the lever 5 is provided with rearwardly extending lug 34 from which extends a cable 35 connected to control the elevators of the aeroplane. Q

36 indicates an arm carried by the rocking shaft 3 and to which are connected

cables

37 and 38 connected to the ailerons. 36* and 37* indicate conical supporting standards secured to the bottoni of the fuselage and on which the rudder control levers 38* and 38 are mounted. Beneath the control levers 38* and 38 are located

supplemental levers

40 and 41.

On referring to Fig. 2 it will be seen that the upper ends of the conical bearings 36* and 37* are provided with

orifices

36 and 37 surrounded by

annular bearing flanges

36 and 37. The

levers

40 and 41 are provided with central circular portions 40* and 41", each having a central orifice 41" into which extend the bearing flanges 36 and 37'. The forward portion of each central portion 40* and 41* is provided with a peripheral notch 412.

42 indicate sleeves which depend centrally through each of the bearings 36* and 37* and extend upwardly through the foot control levers 38* and 38, the upper end of each sleeve being provided with a closure 38 having a central orifice 382.

43 and 44 indicate plungers provided with enlargements 43* and 44* fitting the sleeves 42 and normally bearing against the lower face of the closure 38'. The plunger 43 is provided with an upward extension 43* pro vided with a jawed upper end 43. The plunger 44 is provided with an upward extension 44 provided with a rounded` upper end. such projection extending through the orifice 382 so as to project upwardly above the level of the foot control lever 38. Each lever 38* and 38 is provided with bearing brackets 45 and 46 located centrally of the front portion of the corresponding foot control lever and, therefore, above the

notches

412 and 41. 47 indicates a locking lever which is pivoted in the bracket 46 and is provided with a horizontal arm 47* resting at its extreme end upon the upper end of the projecting portion 44 of the plunger 44. the upper portion of such arm at its extreme end being provided with a rounded projection 47 for a purpose which will hereinafter appear. The lever 47 is also rovided with a depending arm 472 provided with an inwardly extending portion 473 at its lower end designed to normally enter the notch 41 thereby locking ,the foot control lever 380 and supplemental lever 41 together.

such slot being located i8 indicates a similar lever journaled in the bracket 45 carried by the forward foot con trol lever 38". The lever 48 is similar in construction to the lever 47 with the excep tion that the extreme end of the horizontal arm 48* thereof extends into the jaw 43 and is pivotally secured therein.

4f) indicates a bell crank lever located within the conical bearing 3W, being pivote ally mounted on a suitable projecting lug 49*. The horizontal arm of the bell crank 49 is pivotally connected to the lower end of the plunger 43. Each sleeve 42 is pro vided at its lower end with a closure 50 having a central orifice through which the plungers 43 and 44 freely extend. 51 indicate compression springs extending between the closures 50 and the lower face of the enlargements 43* and 44* of the plungers 43 and 44. 52 indicates a pull bar which is provided with a looped portion 52* extending around the depending portion 42 within the conical bearing 36*, the forward end of the looped portion being pivotally connected to the upwardly extending arm of the bell crank 49. The pull bar 52 preferably cx tends through the orifices formed in the conical bearings 36* and 37* and is provided intermediately of its length with a looped portion 52o located beneath the plunger 44 so as to allow of freedom of movement of such plunger. 53 indicates a bell crank pivotally mounted in a bracket 54, the depending arm of which is pivotally connected be tween the jaws 52* of the pull bar 52. The lower end of the vertically movable rod 30* is provided with a jaw 53* into which thi` horizontal arm of the bell crank 53 extends. and in which such horizontal arm is pivotally connected. The rod 30* interinediately of its length is provided with an enlargement 53 having a vertical slot through which a cross pin 532 extends for a purpose which will hereinafter appear.

The rear end of the rocking shaft 3 is provided with' a bearing lug 54a. The forward end of the rocking shaft is provided with bearing jaws 55. 56 indicates a lever arrn swung on a cross bolt 57 extending through the jaws 55. 58 indicates a bolt extending through the lug 54a and on which is swingably mounted a crotch member 59 having an upwardly extending arin 59* provided with a forked end 590 through which extends a cross pin 59. 60 indicates a link rod pivotally connected at one end to the arm 56 and provided at its opposite end with a slotted enlargement 60* through which the cross pin 59 extends. 61 indicates a depending member secured to the rod 60 intermediately of its length. 62 indicates a sleeve slidably held upon the rock ing shaft 3, the lower portion of the sleeve being provided with a semi-cylindrical cani portion 62", the forward portion of which soA is tapered, such tapered portion being held in such position as to engage with the rounded portion 47 of the locking lever 47. The upper portion of the sleeve 62 is provided with a longitudinal slot 62 into which the projection 61 extends, the forward end of the slot being closed and the rear end open for a purpose which will hereinafter appear.

Upon the bolts 57 and 58 are secured

arms

63 and 64, the arms 63 being preferably secured at each end of the bolt 58 and an arm 64 at each end of the bolt 57. The arm 63 extends through the slotted opening of the enlargement 53', the pin 532 passing through an arc-shaped slot 63K formed in the arm. The arm 64 passes through the jaw formed at the lower end of the rod 3()` a pin 64 passing through such jaws and through the arc-shaped slot 64 formed in the arm. The arc-shaped slots 63X and 64 are so formed that when the arms are swung upon the bolts 57 and 58 they will not impart movement to the

rods

30 and 30, the pins 532 and 64x passing freely longitudinally of the slot. The

sleeve bearings

29 and 29 are each provided with supplemental bearings 65 and 66 in which is slidably held a vertical rod 67.

As will be noted on referring to Fig. 3 the bearing 66 and vertically movable rod 67 are located on each side of each control lever, the upper ends of the rods 67 being connected together by a cross rod 68 extending through the open ortions ot the bearing sleeves 29x, slots 2 and through slots 60 formed in the portion 5 and through the longitudinal slots 7o formed in the spring plunger 7. The lower end of each rod 67 is provided with a jaw 67* through which extends a cross pin 67. The lower portion of the cross member 59 is provided with outwardly extending arms 592 terminating in upwardly arc-shaped inwardly directed ends 59a provided with arc-shaped slots tl'irough which the cross pin 67n extends. Arms 64 'having slots 64X similar to the arms 63 are secured to the bolts 57. The lower portions of the

rods

30 and 30*I between the

bearings

29 and 29* and the enlargement53' of the rod 30 and the lower jawed end of the rod 30, are surrounded b v a spiral compression spring 68 for a purpose which will hereinafter appear. T'he handles of the

levers

23 and 24 hereinbefore described are provided with longitudinal bores 69 and the body of the lever with a longitudinal slot 70, an intermediate portion being connected by an orifice 71. The upper end of the bore 69 is provided with a` closing cap 72 provided with a central orifice 73 in alinement with the orifice 71. y Y

74 indirmtes a rod extending through orificos 73 and 71 and provided at its lower end with a block 75 having ratchet portions 76 designed to engage the teeth of the arcshaped guides 20 and 21. The upper end ot.' the rod 74 is provided with a pressure knob 76X. 77 indicates a compression spring extending between the closure 72 and the bottom of the bore 69 and surrounding the rod 74.

The supplemental levers 40 and 4l are connected together by

cables

80 and 81. the supplemental lever 4l being connected by ca les 82 and 83 to the rudder mechanism.

Having described the principal parts involved in my invention I will briefly describe the operation of the same.

l will irst describe the operation of breaking the forward stick control lever 4 and foot control lever 38 by the operator of the stick control 5.

l/Vhen the operator oi the stick control 5 desires to break connection he strikes the supplemental lever 23 so as to force it forwardly and carry the dog 76 into engage ment with the teeth 22. By this means the arms 27 are raised pulling thc rod 30X vertically against the tension of the surrounding spring 68. By this means the bell crank 53 is tilted pulling upon the pull rod 52 which thereby draws the vertical arm of the bell crank 49 rearwardly and the horizontal arm downwardly pulling upon the spring held plunger 43 which is thereby drawn downwardly against the compression of the spring 5l, tilting the locking lever 48 so as to carry the depending arm thereof outwardly out of engagement with the notch 412. By this means the foot control lever 33x is thrown out of engagement with the supplemental lever 40 and is free to swing independently of the supplen'lental lever 40 around its bearing formed by the sleeve 42. By the same operation the arms 63 are carried upward by the cross pin 532 passing through the slot 63x thereby forcing the upper end of the crotch lever 59 rearward i and carrying the lin'k rod 60 in the same direction. The link rod 60 being connected at its opposite end to the lever arm 56 throws such lever arm rearward carrying the arms 64 and arms 59 downward thereby pulling the vertical rod 67 carried by the stick control lever 4 downward so that the cross rod 68 engages the lower end of the slot 7 of the plunger 7 thereby drawing it out of enga ement with the ball 11 of the stick contro 4, allowing the ball to turn freely `within the socket and thereby break ing the connection between the upper portion of the stick control 4 with the lower portion rendering the upper portion inoperto do is to press upon the knob 76* forcing the rod 74 downward against the 'compression of the spring 77 and thereby carrying the ratchet dog 76 out oi' engagement with the ratchet teeth QQ. A s soon as this operation has been effected the pressure spring 68 forces the rod 3U downward carrying the lever back to its4 normal position and :it the same time releasing the bell crank 19 allowing the plunger '13 lo rise und carry the locking lever 4S back to the position to engage the notch 412 thereby again rendering the foot lever 38X operative. At the saine time the arm 63 is Jforced downward by the spring 68 thereby carrying the arm 593 in a similar direction so as to carry the corresponding cross pin 68 again into the bottom of the slot 7 of the plunger 7 ot' the mechanism locking the stick control By the same operation the link rod 60 is carried in a direction reverse to arrow, the arm 56 being thrown outward and the arms 6i and 590 upward, the pin 6l passinor freely longitudinallj of the slot (Belo and the slot of the arm 69 engaging the pin extending through the jawed lower end of the vertical rod 6T carried by the stick control lever 4 thereby carrying the corresponding cross pin 68 upward in the slot Y and thereby releasing the spring plunger 7 allowing it to rengage with the orilice 11x of the ball 11 of the control lever 4 when the control lever is brought to the vertical position.

I will now describe the operation by which the stick control lever 5 and foot control lever 38 are thrown out of operation by the operator of the stick control 4.

To e'ect this the operator strikes the supplemental lever 24 so as to force it forwardly carrying the arms 28 upward and pulling upon the link rods 282 connected to the rod 30 so to pull the arm 64 upward. By this operation the lever arm 56 is thrown outward pulling upon the link rod 60 so as to carry it in the reverse direction to arrow, carrying the forward end of the depending projection 61 against the closed end of the slot 62 forcing the sleeve 62 reversely to direction of arrow and carrying the cam portion 62* into engagement with the rounded projection 47 of the locking lever 47. As the cam 62X rides upon the projection the projection is depressed, forcing the spring plunger 4A downward, the opposite end of the locking lever being carried outward out of engagement with the notch 41. By this means the foot control lever 38 is disconnected from the supplemental lever 41 and is free to revolve upon its supgprting bearings so as to be inoperative. y the same operation the link rod 60 pulls the upper end of the crotch lever 59 forward, depressing the arm 59s which pulls upon the rod 67 carrying the cross rod 68, which cross Arod engages with the lower end ofthe slot 7 of the spring plunger 7 so to draw it out of engagement with the recess 11x ol: the ball ll of the lstick control 5, thereby rendering the upper portion ofthe stick control 5 free to move in any direction without affecting the lower portion of the mech unism.

lVhen it is desired to restore normal conditions all the operator has to do is to press upon the knob 76* olI the lever 24 carrying the correspondin ratchet dog 76 out of engagement with t e ratchet 2:2 thereby freeing the mechanism which is forced back to the normal position by the spring 68". As the mechanism is carried to the normal osition the link rod 6() is carried in the direction of arrow thereby carrying the depending projecting portion 6l out of engagement with the closed end ot' the slot 62 thereby freeing thc sleeve 62 which is forced rearwardly by the pressure of the spring pluner 44 exerted upwardly against the free end of the lever 47 thereby simultaneously forcing the sleeve 62 back to its normal osition and carrying the depending end oi) the locking lever into position to reengage with the notch 41.

From this description it will be seen that I have devised a very simple device whereby the front or rear operator may throw the stick control or foot control of the other operator out of engagement so as to leave the machine entirely in his hands, accomplishing this result by compact mechanism which does not necessitate the use of any other cable connections than those which are commonly employed in an aeroplane.

What I claim as my invention is.

1. In an aeroplane control mechanism, the combination with a manually controlled lever and a foot controlled lever and rocking shaft on which the manually controlled lever is carried, a rod carried by and extending longitudinally of the rocking shaft, and means operated by the longitudinal movenient of the rod for disengaging the control levers from the control mechanism.

2. In an aeroplane control mechanism, the combination with manually controlled levers and a Jfoot controlled lever and a rocking shaft on which the manually controlled levers are mounted, of a supplemental lever carried by one of the manually controlled levers, a rod carried b and extending longitudinally of the rocking shaft, mechanism for imparting longitudinal movement to the rod by the operation of the supplemental lever,and mechanism operated by the longitudinal movement of the rod for disengaging the other manually controlled lever and the foot controlled lever from the control mechanism.

3. In an aeroplane control mechanism, the combination with a manually controlled lever and a foot controlled lever and a rocking shaft on which the manually controlled lever is mounted, of a supplemental hand lever carried by the manually controlled lever, a supplemental Yl'oot lever located beneath the foot controlled lever, rcleasable lookin means for connecting the foot controllefgl and supplemental foot lever together, and means carried by the rocking shaft and operated by the hand lever for releasing such locking means.

4. In an aeroplane control mechanism, the combination with a manually controlled lever, a foot controlled lever and a' rocking shaft on which the manually controlled lever is mounted, of a supplemental hand lever, a supplemental foot lever, means for locking the foot levers together, and a releasing cam carried by the rocking shaft and operated by the supplemental hand lever, and means for simultaneously disengaging the manually operated lever from the control mechanism.

In an aeroplane control n'iechanism, the ci'unhination with the manually controlled lever and thc foot controlled ever and a rocking shaft on which the manually controlled lever is mounted, of a supplemental hand lever, a supplemental foot lever having a central edge notch, a locking lever carried by the foot lever, resilient means for forcing it into engagement with the notch, a cam member carried by the rocking shaft operated by the hand lever to force the cam into engagement with the locking lever to carry the lever out of the notch, and means for simultaneously disengaging the manually controlled lever.

6. In an aeroplane control mechanism, the combination wlth the manually controlled lever, the foot controlled lever and the rocking shaft, of a supplemental foot lever 1ocated beneath `the foot controlled lever having a notch radial to its center of swing, a spring plunger located in the foot controlled lever, a bell crank carried by the foot controlled lever having one end in the aforesaid notch and the other end resting on the plunger, and a cam member carried by the rocking shaft for operating the bell crank, and means for disengaging the manually controlled lever from the control mechanism, and for operating the cam member.

7. In an aeroplane control mechanism, a pair of manuell controlled levers one of which is dividedy into two portions, a ball and socket joint connecting such portions, a locking lunger held in the socket and engagin t e ball, a supplemental hand operated ever carried b the other manually controlled lever, a roc ing shaft on which the levers are carried, lever arms swung on each end of the rocking shaft, a link rod connecting the arms together, a rod depending from the supplemental hand operated lever and connected to one of the lever arms, and a rod extending from the other lever arm and connected to the lock for operating the same.

8. In an aeroplane control mechanism, a pair of manually controlled levers formed in two portions, a ball and socket connection between the portions, a spring locking plunger engaging each ball, a longitudinally movable rod, suitably mounted arms forming bell crank members having one arm connected to each end of the rod, means for linking the other arms to the sprin plungers, and means for imparting longtucnal movement to the rod to alternately Withdraw the spring plungers.

9. In an aeroplane control mechanism, a pair of manually controlled levers formed in tWo portions, a ball and socket connection between'the portions, a spring locking plunger engaging each ball, a longitudinally movable rod, suitably mounted arms forming bell crank members having one arm connected to each end of the rod, means for linking the other arms to the spring plungers, means for imparting longitudinal movement to the rod to alternately withdraw the spring plungers, a pair of foot control levers and connections to the rudder, and means for breaking the connection between the foot control lever and rudder connections corresponding to the manually controlled lever having its plunger withdrawn.

10. InI an aeroplane dual control, a foot control lever under the control of one operator and mounted centrally upon suitable bearings, a supplemental lever mounted on the same bearing and to which the rudder controls are connected and having a central edge notch, a bell crank locking lever pivotallymounted on the foot control lever and engagmg the notch of the supplemental lever, resilient means for holding the locking lever in engagement, and means operated by the-other operator for lifting the locking lever clear of the notch. i

11. In an aeroplane dual control, a foot control lever operated by one operator and mounted centrally on bearings, a supplemental lever mounted on the same bearings and to which the rudder controls are connected and having a central edge notch, a bell crank lever mounted on the foot control lever and held in resilient engagement with the notch, a manuallyy controlled lever for each operator, control mechanism operated thereby, and means operated by one operator for breaking the connection of the manually controlled lever of the other operator with the control mechanism and withdrawing the locking lever of the foot control out of engagement with the notch.

12.,In an aeroplane control mechanism, the, combination with a pair of manually controlled levers and a pair of foot controlled levers and a rocking shaft on which the manually controlled levers are carried, a rod carried by and extending longitudinally of the rocking shaft, and means operated by the longitudinal movement of the rod for alternately disengaging a manually controlled lever and a foot lever simultaneously.

13. In combination a pair of hand operated control levers, one for each operator, a rock shaft on which the said levers are mounted to be operated by said levers, one of said levers being formed in sections with means for locking said sections in alinement, a rod extending parallel with the rock shaft, a connection from said rod extending upwardly along the sectional hand operated contro] lever for operating the lock when the said rod is moved, a supplemental hand lever connected to said rod for operating it, a pair of foot levers, one for each operator, rudder connections to be operated as a conscquence of the operation of the foot levers, a supplemental lever interposed between one of the main foot levers and the rudder connections, locking means for connecting the supplemental foot lever with said main foot lever and means for controlling said lock from the movement of said rod, substantially as described.

14. In combination a pair of hand operated control levers, one for each operator, a rock shaft on which the said levers are mounted to be operated b v said levers, one of said levers` being formed in sections with means for lookin said sections in alinement, a rod extending parallel with the rock shaft, a connection from said rod extending upwardly along the sectional. hand op erated control lever for operating the lock when the said rod is moved, a supplemental hand lever, connected to said rod for operating it, a pair of foot levers` one for each operator, rudder connections to be operated as a consequence of the operation of the foot levers, a supplemental lever interposed between one of the main foot levers and the rudder connections, locking means for connecting the supplemental foot lever with said main foot lever and means for controlling said lock from the movement of said rod, said rod being movable length wise, a `bell crank lever between one end of said rod and the said connection which opcrates the lock of the sectional hand operated control lever and a second bell crank lever between the other end of said rod and the supplemental hand lever connection, substantially as described.

15. In combination a pair of hand operated control levers, one for each operator, a rock shaft on which the said levers are mounted to be operated by said levers, om` of said levers being formed in sections with means for locking said sections in alinement, a rod extending parallel with the rock shaft, a connection from said rod extending upwardly along the sectional hand operated control lever for operating the lock when the said rod is moved, a supplemental hand lever connected to said rod for operating it, a pair of' foot levers, one for each operator, rudder connections to be operated as a consequence of the operation of the foot levers, a supplemental lever interposed between one of the main foot levers and the rudder connections, locking means for connecting the supplemental foot lever with said main foot lever and means for controllin said lock from the movement of said ro said rod being movable lengthwise, a bell crank lever between one end of said rod and the said connection which operates the lock of the sectional hand operated control lever and a second bell crank lever between the other end of said rod and the supplemental hand lever connection, said rod with its connections being supported to move laterally about the axis of the rock shaft as the hand operated control levers are moved laterally. substantially as described.

16. In combination in a dual control mechanism for aeroplanes, a rock shaft, a pair of hand operated control levers, one for each operator mounted thereon, to turn said shaft in its bearings when swung laterally, a pair -of main foot levers, rudder connections controlled thereby, a supplemental foot lever interposed between one of the main foot levers and the rudder connection, detachable locking means between the supplemental foot lever and its main foot lever, one of said hand operated control levers having a detachable looking means wherebbv it may be rendered ineffective, a rod extending along the rock shaft and connect-- ed at one end with the said last mentioned detachable locking means, means operable by the other operator to move said ro-d for releasing said lock, and means operated b v the movement of the rod for operating the lock of the su pplemental foot lever, substantially as described.

17. In combination 'in a dual control mechanism for aeroplanes, a rock shaft, a pair of hand operated control levers, one for each operator mounted thereon to turn said shaft in its bearings when swung laterally, a pair of main foot levers, rudder connections controlled thereby, a supplemental foot lever interposed between one of the main foot levers and the rudder connection, detachable locking means between the supplemental foot lever and its main foot lever, one of said hand operated control levers having a detachable locking means whereby it may be rendered ineffective, a. rod extending along the rock shaft and connected at one end with the said last mentioned detachable locking means, means operable by the other operator to move said rod for releasing said lock, and means operated by the movement of the rod for operating the lock of the si'lpplemental foot lever, said last mentioned meansl including a cam mounted lo move on the rock shaft, substantially as described.

18. ln combination in a dual control meehanism for aeroplanes, a rock shaft, a pair of hand operated control levers, one for each operator mounted thereon, to turn .said shaft in its bearings, when swung laterally, a pair of main foot levers, rudder connections` eontrolled thereby, a supplemental foot lever interposed between one of the main foot levers and the rudder connection, detachable locking means between the supplemental foot lever and its main foot lever, one of said hand operated control levers having a detachable locking means, whereby it may be rendered ineffective, a rod extending along the rock shaft and connected at one end with the said last mentioned detachable locking means, means operable by the other operator to move said rod for releasing said lock, and means operated by the movement of the rod for operating the lock ol the supplemental foot lever, said last mentioned means including a cani slidable on the rock shaft and turning with the rock shaft While maintaining its effective relation to the detachable locking means of the foot lever, substantially as described.

19. In combination a rock shaft, a pair of hand operated control levers mounted thereon to turn the same, a pair of foot levers, one for each operator, a detachable lock for freeing one of the hand control levers, rudder connections, a detachable lock for freeing one of the foot levers, a rod eX- tendin substantially parallel with the rock shaft, ell crank levers carried by the rock shaft at its ends, to Which the rod is connected, a connection between one bell crank and the detachable locking means of the hand control lever, a supplemental hand lever mounted on the other hand control lever, a connection from the other bell crank thereto to be operated thereby and means connected With the rod for releasing the detachable connection of the foot lever, substantially as described.

20. ln combination a rock shaft, a hand operated control lever at each end of the same, a pair of foot levers, rudder connections extending therefrom, a supplemental foot lever interposed between one of the foot levers and the rudder connections, said supplemental foot lever and its companion main foot lever being mounted to turn about a pivot centrally under the rock shaft, a locking device between the supplemental foot lever and the main foot lever having a contact portion located substantiallyy over the pivot of said levers, a cam member slidably mounted on the rock shaft to engage the, contact portion of the, locking device in all angular positions of the rock shaft, a supplemental hand lever mounted on one of the hand control levers and a connection between the same and the said cam for operating the latter, substantially as described.

21. In combination with a hand operated control lever made. in upper and lower sections With a spring pressed locking plunger for holding the sections in alineinent, said plunger having a vertical slot, a pin passing transversely through the slot, a rod on each side of the control lever connected with the cross pin, a bell crank lever having arms connected ,With the rod and means for positively operating the bell crank lever in one direction to move the pin and Withdraw the plunger, said bell crank lever when operated in the other direction moving the cross pin upwardly in the slot of the plunger to allow the spring to force the plunger to locking position when the upper section of the hand control lever assumes normal position in relation to the lower section and a rock shaft carrying all of said parts, substantially as described.

M. EGAN,

N. CARTER.

Copies of this patent may be obtained for flve cents each, by addressing the Commissioner ot Patents, Washington, D. C.