P. M. wA nE - 2,409,231 THROTTLE - CONTROL ' Filed Sept. 28; 1943 6 Sheets-Sheet l - amend/(M RMI/l/az'ie ‘0d. 15, 1946. P. M. wArrE 2,409,231" THROTTLE CONTROL Filed Sept. 28, 1943 6 Sheets-Sheet 2 0d. 15, 1946. p_ wA?-E 2,405,231 THROTTLE CONTROL I Filed Sept. 28, 1943 6 Sheets-Sheet 3 Oct. 15, 71946.. ‘P. M. mm; 2,409,231. THROTTLE CONTROL Filed Sept. 28, 1943 l -6 .Sheets-She‘ei 5 Patented Oct. 15, 1946 2,409,231 UNITED STATES PATENT OFFICE 2,409,231 THROTTLE CONTROL Philip M. Waite, Corry, Pa. Application September 28, 1943, Serial No. 504,184 10 Claims. (Cl. 74-471) 1 2 This invention relates to throttle controls for airplane engines and is an improvement over the fall within the scope of the invention'as claimed. In the drawings: Figure 1 is a detail side elevation of a throttle control constructed according to an embodiment of this invention, construction shown in my copending application Serial Number 424,080, filed December 22, 1941, for throttle controls, and is a coninuation in part and an improvement over the construction em bodied in my copending application Serial Num ber 467,882, ?led December 4, 1942 for Throttle controls. , Figure 2 is a sectional view taken on the line 2—2 of Figure 1, Figure 3 is a detail side elevation of the aux iliary or secondary lever operated in synchronism with themain lever, In the regulation of the speed of an aircraft, it is very desirable that the pilot of the plane Figure 4 is a detail front elevation of a modi be relieved as much as possible of adjusting either ?ed form of this invention, simultaneously or in sequence the positions of Figure 5 is a sectional view taken on the line 5—5 of Figure 4, , ' the various engine and propeller regulating levers. Heretofore, individual regulating levers have 15' Figure 6 is a sectional view taken on the line ?—6 of Figure 5, been provided for regulating the position of the Figure 7 is a fragmentary sectional view taken main throttle, the operation of the supercharger, on the line '!—-'| of Figure 9, . and the operation of the propeller pitch changing Figure 8 is a detail side elevation partly broken mechanism. The prior structure, which is known . as a quadrant, required that the pilot manually V20 away and in section of the device, , Figure 9 is a fragmentary side elevation on the shift each control or regulating lever in synchro side opposite from that shown in Figure 8, nism with the various instruments on the ins-tru Figure 10 is a sectional view taken on the line ment panel, and during combat operations the 6 0-40 of Figure 8, H pilot frequently is unable to adjust the several levers in their proper sequence, thereby result 25 Figure 11 is a fragmentary front elevation of the adjustable stop for the main lever, and ing in improper engine and plane operation. f Figure 12 is a detail side elevation of the swing -It is, therefore, an object of this invention to ing cam element. , provide a throttle control which will eliminate the Referring to the drawings, and ?rst to Figures personal element in engine and plane operation, 1 to 3, there is disclosed a throttle control or and which will automatically and mechanically quadrant which includes a frame structure gen synchronize the operation of various regulating erally designated as I5. The frame structure i5 levers‘ with adjustment by the pilot of the main includes a front sector-shaped frame member I6 throttle lever. With a construction of this kind, and a rear sector-shaped frame member IT. The the pilot will be able to keep one hand on the two frame members I6 and I‘! at their lower por throttle lever and the other hand on the “stick,” tions are formed with a disc-shaped hub l8 and and it will not be necessary for the pilot to divert I9, respectively, and the frame members It and his attention from an enemy plane to his instru I‘! are held in spaced apartrelation at their upper ment panel. ‘ portions by spacing members 20 which are secured Another object of this invention is to provide a to the frame members !6 and H by holding bolts throttle embodying a swinging cam member or fastening members2 l. _ which is positively rocked by swinging of the main The lower portion of the quadrant or throttle throttle lever, and it will be understood that there control is formedlwith a stationary hub or pivot may be one or more of these cam members and member 22 which is of- cylindrical construction secondary levers for regulating the desired part 45 and is disposed between the plates or disc-shaped or parts in properly timed sequence with the ad members l8 and IS. The hub or stationary pivot justment of the main throttle lever. I 22 has mounted in the opposite ends thereof disc To the above objects and others which may shaped plates 23 and 24 and a securing bolt 25 hereinafter appear the invention consists of the is extended through the plates or disc members novel construction, combination and arrange 50 l8 and I9 and also through the disc members ment of parts as will be more speci?cally referred to and illustrated in the accompanying drawings, 213 and 24. ' I A main throttle lever 26 which is adapted to be wherein are shown embodiments of this inven connected to the throttle of an internal combus tion, but it is to be understood that changes, vari tion engine is pivotally mounted on the pivot ations and modi?cations may be resorted to which 55 member 22. The throttle member 26 includes an 2,409,231 3 elongated lever arm 21 which at its lower portion is formed with a ring-shaped hub 28 rotatably engaging about the stationary cylindrical pivot member 22. A lower lever arm 29 extends from the hub 28 and is formed with a plurality of open ings 39 through which fastening members may be extended to adjust the leverage of the linkage connected to the lever arm 29. 4 clined cam track portion 53 provides for the ?nal downward rocking of the lever 3| at the end of the movement of lever 26 to the right. The main throttle 26 has mounted thereon a roller 54 which engages in the cam track 41, the roller 54 being rotatably carried by a roller sup port 55 which is ?xed to the main throttle 26. Referring now to Figures 4 to 12, inclusive, there is disclosed a modi?ed form and production A second lever generally designated as 3| is rockably mounted .on the hub or pivot "member 10 model of a throttle control or quadrant. 22 and includes a ring-shaped hub'part 32 rotat ably engaging the pivot member 22, a lever arm The ‘throttle shown in Figures 4 to 12 includes a frame structure generally designated as 56 which is somewhat similar to the frame structure [5. The 33 formed with an opening 34 at its outer portion, framestructure 56 includes front and rear frame and a right angularly disposed lever arm 35. The arm 35 extends below the frame structure and is 15 members 51 and 53 of sector-shape having formed at their lower portions ring-shaped pivot sup formed with openings 36 for receiving securing means to connect the arm 35 with the desired part which is to be adjusted in synchronism with the adjustment of the throttle member 26. .As I porting members 59 and 69, respectively. A sta-' tionary cylindrical pivot member BI is mounted at the opposite ends thereof in the annular frame an example the arm 35 may be connected either 20 members 59 and 65. Preferably, an end plate 62 is threaded into one .end of thestationarypivot to the propeller adjusting mechanism or to a 6| and is seated at its outer end in a rabbet 63 supercharger. It will, of course, be understood .formedin the annular framemember .56 .and is that there may be one or. more auxiliary. or sec secured therein by fastening members 64. ondary levers mounted on the pivot member 22 and adjusted in synchronism with the adjustment 25 A main throttle lever, generally designatedv as 65, is rockably mounted on the pivot member 6|, of the main throttle lever 26. being formed with an elongated lever'arm 66 The pivot member 26 has mounted thereabout having a ring-shaped hub 61 rotatably engaging a cylindrical spacer 31 disposed/at oneside of the pivot member 6|. An angularly disposed and the main throttle .lever. 26, and a friction ring 38 is interposed between the adjacent end of the 30 sidewise projecting arm 63 is ?xed to the lever arm 66, being shown .more clearly in Figure'lO. spacer 3'? and the side of thehub 28 of‘thei throttle The arm 68 in the present instance, is riveted ,or lever 26. A second spacer_ring39»' is mounted on otherwise ?xed, as at 69 to the arm 65. In the the pivot member22 on the opposite side. ofthe present instance, the main throttle member ‘65 hub 28 and a friction ring 46 is interposed be tween the confronting faces of the ring 39 and 35 is formed of an.inner arm 10 and outer arms or plies ‘H and 12. the hub 28. A ring-shaped spacer 4| ismounted A'spacer ring:'|3 is'mounted on the pivot mem on the pivot member 22 between the'frame mem ber 6|"at the rear side of the lever 65 and a ‘fric ber I1 and the hub 32 of the lever 3!. A friction tion ring 14 is interposed betweenthe confronting ring 42 is interposed between the confronting end of the spacer 4| and the adjacent sideof the 40 end of the spacer '13 and the adjacent end or side of the hub 61. A secondary or auxiliary hub 32. A frictionv ring 43 is also interposed be lever, generally designated as '15, is rockably tween the confronting sides of the spacer .39 and mounted on the pivot member 6| forwardly of the hub32, the lever 65. The secondary lever ‘i5 is adapted The lever 3| is adapted to berocked. in syn .chronism with the rocking .or swinging of the 45 to be connected to a suitable part which is op erated in synchronism with the main lever'65 main lever 26 and at a differential movement by and as an example may be connected ‘to either means of .a pivoted .oam plate-44. The cam plate vthe supercharger or to the propeller pitch ad 44 is provided with an arm 45 connectedto .one justing mechanism. end of the body 46 of .the cam and the arm45 is The lever 15 includes an annular hub '26 which .adapted to be .rockably mounted on one of the ‘is rotatably mounted on the stationary pivot 6|. bolts 2| which hold the frame structure together. An angularly disposed relatively wide arm ‘His The body 45 of the cam is formed withan irregu formed integral with the hub 76 and is formed larly shaped cam track 41 which has such a con with a pair of elongated lengthwise extending ?guration extending lengthwise of the cam body 46 as to provide a differential rocking movement 55 slots 18. An adjustable arm '19 is secured ‘by fastening members 80 to the arm 11, and prefer of the secondary or auxiliary lever 3|. The end ably, one side of the arm 11 is formed-with a of the body 46 opposite from the army 45 has piv series of serrations or teeth BI "and the arm 19 otally secured thereto as at .48 one end of a link is formed with complementary serrations so that 49. The opposite endof the link 49 is pivotally secured as at 59 to the outer end of the arm 33 60 the arm 19 which is disposed atv an obtuse angle to the arm 11 may be adjusted toward or.from of the lever 3|. As at present shown, the cam the ‘pivotal center of the lever ‘15. The arm 19 track 41 is provided with arelatively sharp up extends in the same direction as the arm 68 of wardly extending track portion 5| which com the main lever 66 and is formed adjacent the municates with a downwardly inclined straight track portion 52, and the. latter communicates 65 outer end thereof with an opening 82 for receiv ing securing means to secure one end of alink with an obtusely related cam track portion 53. age to the arm 19. A U-shaped guard or shield The ?rst cam track portion 5| is provided in order 83 is mounted on the lever arm 19 andhasxthe to effect .a..rapid downward rocking of the lever parallel sides thereof engaging on the opposite 3|, and the cam track portion 52 which is the sides of the fastening members 88. intermediate cam track portion is adapted to A second lever 84 is formed integral with the provide an intermediate dwell or inactive cam arm 11 and extends outwardly at a substantially track portion wherein the lever 3| will be held .acute angle with respect to the length of the stationary while the main throttle 26 is being arm 19. The outer end portion of the lever arm rocked forwardly or to the right, as viewed in Figure 1. The obtusely. related and upwardlyin 75 .84 isformed with an obtusely disposed .U.-shape_d 2,409,231 5 arm portion 85. 6 A rockable cam element, gen ber I08 may be extended through the opening III erally designated as 86, is mounted in the frame Structure 56 and comprises an elongated longi_ tudinally curved plate 8'! which is formed with to the upper end of the lever 65. of the spacer I68. The lever H2 may be used for a cam track 88. One end 89 of the plate 81- is pivotally mounted on- a pivot member 90 which is supported within the frame 56 by a pair of supporting members 9i and 92. The supporting member BI is the rearmost cam supporting member and is secured to and ex tends laterally of the lowermost frame securing bolts 93. The supporting member 92 is of sub stantially L-shape as shown in Figure 10 and r A third manually operable lever H2 is rock ably_mounted on the pivot member 6| forwardly regulating the mixture of the fuel passing through the carburetor of the engine and the lever I I2 is independent in its movement with re spect to the main and secondary levers. 10 ' A friction washer I I3 is interposed between the hub of the lever I I2 and the forward side of the spacer I58, and a second friction washer II ‘len gases on the forward side of the hub of the lever H2. The several levers which are mounted on most fastening members 93 and also includes an 15 the pivot member 8i are adapted to be regulated as to their free rocking movement by means of upwardly extending arm 95 which. is secured to a resilient spider H5, The spider II5 bears the upper fastening members 93. The cam track against the friction ring H4 and is mounted on 88 includes an arcuate track portion 95 disposed a centrally disposed bolt IIB which is secured at on substantially the are having as its radius the one end to the plate 62. center of the pivot member 6! so that during the A securing pin I I7 extends through the bolt initial rocking of the main lever 65, the cam plate I56 and a boss IIB is formed on the plate 62 so 81 will not be rocked therewith. The cam track as to lock the bolt H6 against rotation. A disc 88 includes an upwardly extending track portion includes a lower arm 94 secured to the two lower 91 communicating with the track portion 96 shaped plate IE9 is slidingly mounted on the in a rapid downward swinging of the secondary $29 which is provided with a boss I2I is thread ably mounted on the forward end of the bolt H6. The rear end of the boss I2I bears against which is disposed on such an angle as to effect 25 terior of the pivot member 5i and a hand wheel lever 15. . The upper end of the track portion 9'! com municates with a second arcuate track portion 88 the sliding plate H9 which bears against the spring spider I is so that adjustment ofthe hand which may be disposed on an arc having as a 30 center the center of the pivot member 6! so that during the last rocking movement of the main lever 65 the cam plate 81 will not be rocked there with. The plate 81 at the end thereof opposite from the pivot 92! is formed with an elongated wheel or not iZil will place the desired tension on the spider H5, and the latter will place the de sired frictional tension on the several levers which are mounted on the pivot member 6 I. v The arms of the spider II5 loosely extend through lengthwise extending slots I22 which are formed in the forward end of the cylindrical pivot slot 99 in which a sliding pivot member Hill is adapted to slidingly engage. The pivot I00 is se member GI. A limiting nut I28 is threaded on a cured between the opposite parallel sides of the reduced stud I24 carried by the outer end of the U-shaped arm portion 85 as shown more clearly 40 bolt IIS so as to limit the outward adjustment in Figure 8 so that rocking of the cam will effect of the hand wheel I20. In this manner the wheel rocking of the secondary lever ‘I5 through the I25 cannot be accidentally removed'from the bolt lever arm 84 and the extension 85. IIS when it is turned in a tension released posi The main lever 65 is provided on one edge tion. thereof with an extension} III! in which a pivot A longitudinally curved spacer bar I25 is member or pin I02 is secured. The pivot mem mounted between the two levers 85 and H2 and ber I02 may be in the form of a roller or the longitudinally curved friction bars I25 and I 2-1 like which is adapted to engage in the cam track are interposed between the rear side of the bar 88 so that the came 86 will be rocked in a differ I25 and the forward-side of the lever 65 and ential movement with rocking of the main lever 50 between the forward side of the bar I25 and the 65. rear side of the lever I I2, respectively. A rear A spacer ring IE3 is mounted on the cylindri longitudinally curved spacer bar I28 is interposed cal pivot BI between the levers 65 and ‘I5 and a between the rear frame member 58 and the rear friction ring IE4 is interposed between the rear side of the lever 85' A second longitudinally side of the spacer I03 and the forward side of 55 curved bar I29 which is formed at one end with the hub 61. A friction washer I85 is interposed an enlargement I 38 is disposed on the forward between the forward side of the spacer ring I03 side of the spacer I 28 and a friction bar I3I is and the rear side of the hub ‘I6 of the secondary interposed between the bar I29 and the rear side lever ‘I5. A spacer ring I86 is mounted on the of the lever I25. The friction bar I26 at one end pivot member 6! forwardly of the lever '55 and a 60 thereof is also formed with an enlargement I32 friction washer I Ill is interposed between the rear having an elongated curved slot I33v through side of the spacer I36 and the forward side of which one of the upper frame fastening bolts 93 the lever ‘I5. loosely engages. . In the present instance, the spacer IIIB has so The two enlargements I38 and I32 extend up cured thereto an electrical coupling unit I88 for wardly of the top of the frame 56 as shown in connecting a switch carried by the outer upper Figure 4 and these enlargements are provided end of the lever 85 with the desired portion of the airplane. The hub or pivot member BI is with. aligned holes I33 and I34, for selectively receiving a frangible wire I35, The inner ends I35 and I3‘! of the enlargements I38 and I32 con formed with an opening IE9 through which the wires may extend and the spacer Iilt is also 70 stitute stops for the lever 65. The lever 65 has formed with an opening IIIl communicating the slidingly mounted thereon a spring pressed latch coupling I08 with the interior of the pivot mem member I38 provided with a handle I39 and the ber 6|. The pivot member BI is also formed with lower end of the latch member, H8 is adapted to an elongated arcuate opening III beneath the normally engage the stop members I36.“ A circus lever 65 so that the wires from the coupling mem 75, lar eccentric Ito is mounted on an upper-frame 2,409,231 i7 bolt .93 between’ ‘the ‘spacer _.I‘26 'fan’d the:v friction bar I3I. . In practice during the'n'ormal operation of th engine, the lever 65 will stop at the ‘stop member I36, but if an emergency speed is desired the latch ~ I38 may be raised so that the main lever 65 may ‘be moved an additional distance depending on the position or ‘adjustment of the eccentric stop I40. This latter emergency movement of the ¥1ever~65 will provide such an increase in the speed 10 of'the engine as to cause damage to the engine if ‘operated ‘for a predetermined period of time, and fori-this reason the telltale wire I35 is provided 7'8 ?guration :depending‘uponthe desired movement which is to be effected with respect to the'sec ondary lever ~15. - V The operation of the ‘structure shown inFig ures 1, 2 andS will be quite similarto that de scribed as to the control .mechanism shown in Figures 4 to 12, inclusive. It will be understood that if additional levers are to be connected with the main lever 65 for-differential movement with respect thereto, it is only necessary to provide additional cams and other connections similar to that heretoforedescribed. . , With a quadrant or control as herein, .it is unnecessary for the pilot of a combat plane to so that the mechanics looking over the control after the pilot returns to the ground can deter 115 operate the individual controls for the different mechanisms manually and at the same time view mine ‘at a vglance whether the emergency speed the instrument board in order to determine the 'was used by the pilot. proper movement .for adjustment of the several Where such emergency high speed is used, the control levers with respect to the .engine opera normal practise is to take the engine down and examine the same very carefully to determine 20 tion which is regulated by the main throttle. ‘In other words, this control provides a synchronized what part or parts were damaged by such emer mechanism operated from and by the main throt gency speed. An elongated longitudinally curved tle lever which will relieve the pilot of any adjust spacer bar MI is interposed between the forward ment of the secondary lever or levers, and will frame member 51 and the lever I I2 and a friction relieve the pilot of the necessity during emer bar I42 of longitudinally curved con?guration is gency comb-at operation-to manually adjust the interposed in the rear side of the bar MI and the secondary levers in conjunction with the engine forward side of the lever'I I2. speed, as shown by the usual instruments onithe A cover plate I43 is mounted on the front side instrument board. ‘olfithe frame '56 and is formed with an opening This control is a very compact unit and has i’sd’in‘ the’lower portion thereof through which 30 been placed in actual operation on combat planes the'hub ‘or’boss I'2I of the hand wheel I20 loosely and is found to serve a long-felt need for pilots ‘engages. The plate N43 is also formed with an in combat planes. elongated relatively large opening I45 which pro Vides a means for giving access to the fastening members ‘780 on the secondary lever. Mixture lever \Ii2 has ‘secured thereto an angularly ex tending lever arm I46 disposed forwardly of the ‘throttle lever arm 68 and the propeller pitch What I claim is: l. A control device comprising a frame, a‘sta tionary pivot carried by said'frame, a main lever rockable on said pivot, a secondary lever also rockable .on said pivot, said secondary lever in cluding a pair of angularly related arms, an elon . In the use and operation of this control or 40 gated cam plate pivotally carried at one end thereof by said frame and provided with a cam quadrant‘the lever arm 68' is connected by suit ‘changing arm or lever ‘I9. able linkage'to' the engine throttle and the lever ‘arm I46 is connected to the mixture adjusting portion of the carburetor. The lever arm ‘I9 is connected to the propeller pitch changing mech anism and ‘the entire unit is mounted on the fuselage of the plane at a point convenient for the pilot. In Figure 4, the main throttle is shown in an intermediate position, wherein the propeller pitch mechanism is adjusted for a portion of the 50 ‘adjustment thereof, the adjusting pin I02 riding in the straight cam track portion being positioned ‘substantially midway of the length of this cam track portion. track, a link pivotally connecting the opposite end of said cam plate to one arm of said secondary lever, and means carried by said main lever en gagingin said cam track whereby rocking of said main lever'will also rock said secondary lever in the same direction as the main lever in either direction of the movement of said main lever. 2..A control device as set forth in claim 1 in which the cam track is so formed as to provide for differential movement of said secondary lever with respect to said main lever. 3. A control device as set forth in claim 1 wherein the other of said arms is adjustable as ' In the off position the lever 65 will be at the 55 to the length thereof. 4. A control device comprising a frame,‘a sta extreme left and in the full on or high speed lever 65 will be at the extreme right. Rocking of the lever t?‘will cause the pin or roller I02 to move tionary pivot in said frame, a lever rockable on said pivot, a second two-arm lever rockable on said pivot, a camplate pivoted at one end thereof in said frame, means pivotally securing one arm of said second lever to the other end of said cam alongthe length of the cam track 88, and from the initial off position of the lever 65 to the begin ning of the cam track portion Q'L'the cam v8t will plate, and means carried by said first lever en; remain stationary and the lever ‘I5 will remain gaging said cam whereby to rock the latter upon stationary. However, when the roller or'pin I02 rocking of said first lever in the same direction enters the beginning of the cam track portion 91, the cam 86 will be rocked downwardly at a speed 65 as said ?rst lever in either direction of the move greater than the ‘rocking movement of the lever ment of said ?rst lever. .5..A control device as set forth in claim 4 arm 68 whichis fixed to the lever 55. When the pin I02 passes out of the upper por wherein said one arm of said 'second lever is tion of ‘the cam track portion 97 and enters the arcuate cam track portion 90, cam 86 will again formed with a reverted end and said cam plate pivotally engages in said reverted end. remain ~stationary, holding'the' lever '55 stationary 6. A control device as set forth in wherein the other arm of said second while lever 65 is'rocked for the remainder of the adjustable as to length. rocking movement of this lever to the right. It 7. A control device as set vforth in will, .of ‘course, be understood that the "con?gura tion'of'th'e'cam'ftrack 08‘ may be any desired icon 75 wherein the other arm of said second claim '4 lever is claim 4 lever is 2,409,231 10 ' formed of two angularly disposed members, and means adjustably securing said members together levers providing lost motion of said secondary lever in at least one phase of movement of said main lever in one direction and for effecting dif ferential movement of said secondary lever with 8. A control device comprising a frame, a main 5 respect to said main lever in another phase of movement of said main lever in the same direc lever pivotally carried by said frame, a secondary tion, said correlated means including a plate lever pivotally carried by said frame, a common formed with an elongated cam track, means piv pivot for said levers, and means pivotally carried otally securing one end of the said plate to said by said frame and correlated with both of said levers providing lost motion of‘ said secondary 10 frame, a link connecting the opposite end of said plate'to said secondary lever, and a roller carried lever in at least one phase of movement of said by said main lever engaging said cam track. secondary lever with respect to said main lever 10. A control device comprising a frame, a main in one direction, for eifecting the differential movement of said secondary lever with respect lever pivctally carried by said frame, a second to said main lever in another phase of movement 15 lever pivotally carried by said frame, a common pivot for said levers, a second lever operating of said main lever in the same direction in either plate pivctally carried by said frame with the direction of movement of said main lever, said fulcrum thereof offset from said common pivot, correlated means including a cam element piv otally supported at one end by said frame, a cam said plate having a cam track therein, a link con necting said plate with said second lever, and a engaging member carried by said main lever, and part carried by said main lever engaging in said a linkage connecting the other end of the cam cam track, rocking of said main lever effecting element with said secondary lever. differential rocking of said second lever in the 9. A control device comprising a frame, a main same direction as and with said main lever in lever pivotally carried by said frame, a secondary lever pivotally carried by said frame, a common 25 either direction of the movement of said main lever. pivot for said levers, and means pivotally carried PI-HLIP M. WAITE. by said frame and correlated with both of said whereby the distance of one of said members from the axis of said pivot may be varied.