Патент USA US2406872код для вставки
Sept° 3, 1946. ‘ P. M. WAITE 2,406,872 THROTTLE CONTROL Filed Dec. 4, 1942 PERCHARG Q/I/ pRop - \ “ 0 6 Sheets-Sheet 1 Sept.~ 3, 1946.’ ' ‘ > P. M. WAlTE Filed Dec. 4, 1942 , - 5p , 52 m4 59 76 95 a! ‘T26 2,406,872 ~ THROTTLE CONTROL 6 Sheets-Sheet 2 ' 3m 3,; 11946. ‘ P. M. WAITE ‘2,406,872 ‘THROTTLE CONTROL Filed Dec. 4, 1942 ‘ 6 Sheets-Sheet 3 Sept. 3, 1946. a P. M. ,WAITE ‘ ’ 2,406,872 THROTTLE CONTROL Filéd Dec. 4, 1942 v6 Sheets-Sheet'll 3,1946;- P. M. wAlTé - ‘ _ 2’406’87'2 THROTTLE CONTROL Filed Dec. 4, 1942 ' 6 Sheets-Sheet 5‘ . ‘Sept. 3, 1946. ' P. M. WAITE' 2,406,872 THROTTLE ‘CONTROL Filed Dec. 4, 1942 ‘S'SheetS-Sheet e ' Patented Sept. 3, 1946 2,406,872 "UNITED STATES PATENT OFFICE 2,406,872 THROTTLE CONTROL Philip M. Waite, Corry, Pa. Application December 4, 1942, Serial No. 467,882 4 Claims. (01. 74-471) 1 2 This invention relates to a control device for in ternal combustion engines and a variable pitch embodiments of the invention, but it is to be un propeller operated by the engine, and is an im derstood that changes, variations and modi?ca tions may be_resorted to which fall within the provement over the construction embodied in my scope of the invention as claimed. copending application Serial Number 424,080, ?led December 22, 1941. ‘ Figure 1 is‘ a detail front elevation of a control constructed according to‘ an embodiment of this , An object of‘ this invention is to‘ provide a unitary control device which is adapted to regu invention, late the normal throttle for the engine, to regu late the operation of the supercharger, and also to regulate the propeller pitch in proportion to Figure 2 is a vertical sectional view through the 19 device, ' Figure 3 is a sectional view taken on the line the throttle and supercharger operation. 3-4 of Figure 2, Figure 4 is a fragmentary sectional view taken Another object of this invention is to provide in combination a movable throttle lever, a movable propeller pitch regulating lever, and means core “ related with both levers for effecting accelerated ‘“ movement of the propeller, lever with respect to on the line 4-4 of Figure 2, , Figure 5 is a fragmentary sectional view taken on the line 5-5 of Figure 2, ' Figure 6 is a sectional view taken on the line the throttle lever upon initial movement of the 6-6 of Figure 1 throttle lever in one direction, and subsequently effecting decelerated movement of the propeller ‘ In the drawings: ‘ Figure 7 is a sectional view taken on the line 20 lever with respect to the throttle lever during the latter portion of they movement of the latter lever in said one direction, the two levers having complete movement through equal length arcs. A further object of this invention is to provide ;, in combination a‘movable ‘throttle lever, a mov able supercharger lever, and means correlated with both levers for initially effecting accelerated movement of said supercharger lever with respect to said throttle lever during the initial movement ,30 'l—-'! of Figure 2, Figure 8 is a fragmentary side elevation of one of the secondary lever operators, Figure 9 is a fragmentary side elevation of a modi?ed form of secondary lever operator, Figure 10 is a diagrammatic view showing the combination of the control with an internal com bustion engine and a variable pitch propeller, Figures 11 to 16 inclusive are diagrammatic views showing the several positions of the main and one of the secondary levers, and Figures 17 to 20 inclusive arev diagrammatic of the latter for effecting decelerated movement " ‘ views showing the several positions of the main of said supercharger lever upon additional move and the other of the secondary levers. ment of said throttle lever, for arresting move ment of said supercharger lever upon subsequent Figure 21 is a front elevation, partly in sec tion, of a modi?ed form of this invention; movement of of both said levers throttle at the lever, sameforspeed effecting upon Figure 22 is a fragmentary sectional view taken on the line 22-22 of Figure 21, and ?nal movement of said throttle lever to the ex Figure 23 is a detail side elevation of the sec treme position of the latter lever, the supercharg ondary lever used with the modi?cation. er lever being normally rearward of the throttle lever when the latter is at its extreme position, v40 2 Referring to the drawings and ?rst to Figures 1 but the supercharger'lever being capable of in- ‘ to 8 inclusive, the numeral 25 designates generally dependent movement from its normal rearward position with respect to the throttle lever, to a po sition laterally aligning with the throttle lever. A further object of this invention is to provide a main rock lever, at least a pair of secondary a frame structure which includes a pair of inner and outer frame members 26 and 21 which are in the accompanying drawings wherein» are shown means to secure the device on a support. disposed in spaced apart relation. The frame member 26 includes a pair of upwardly divergent arms 28 and 29. which have formed integral with levers and means correlated with the main and the lower or convergent ends thereof a bearing secondary levers for effecting differential move boss 3|]. The arm 28 is provided with a pair of ment between the main and secondary levers, and outwardly extending ears 3| and 32 which are also differential movement between the several 50 ‘formed with openings 33 and 34 for receiving at secondary levers. , v taching bolts to secure the device on a suitable The invention consists of the novel construc support. The arm 29 is provided with a pair of tion, combination and arrangement of parts as outwardly directed ears 35 and 35 having openings will be more speci?cally referred to and illustrated 31 and 38, respectively, for receiving attaching 2,406,872 3 The frame member 21 is of like construction to the frame member 26 with the exception that the attaching ears are omitted from the frame member 21. The outer divergent ends of the frame members 29 and 21 are connected together the levers 54, 59 and 99 to thereby hold these levers in their manually adjusted position with respect to the bearing member 55. by means of a connecting bolt 39 within which with the movement of the main lever 54, I have provided a secondary lever operator 78 which is rockably mounted on the bearing member 55. fastening members 49 and 4| engage. The lower portions of the frame members 26 and 21 are also connected together by means of a pair of In order to provide a means whereby the sec ondary lever 59 may have differential movement The lower portion of the operator T6 is spaced connecting bolts 42 and’ 43. A substantially sec 10 from the rear vside of the main lever 54 by means of a spacing ring or washer TI and friction Wash tor-shaped housing formed of sheet metal is adapted to be disposed about the frame members“ ' ers l8 and 19 are disposed on opposite sides of .the operator 19. The washer 78 is interposed be 26 and 2'! and includes a pair of upwardly diver-r tween the ring or spacer ‘I7 and the forward side gent walls 44 and 45 which have formed integral with the upper ends thereof an arcuate wall/46. :15 of 'the operator ‘I9 whereas the washer ‘I9 is in terposed between the spacing ring 63 and the rear The lower end of the wall 44 is provided with a side of the operator 16. The operator ‘I9 is loop or tunnel 41 through which the bolt ‘42 is formed with a radially and outwardly extending adapted to engage. The lower end of the wall body 89 which has formed therein an elongated 45 is formed with a loop or tunnel 48 through which the'bolt 4-3 is adapted to engage. 20 slot 8|, the long axis of the slot 8| being radial to the axial center oft'he bearing member 55. The _ A front wall or plate 49 of substantially sector operator "I6 also includes a r'earwardly offset shape is adapted to engage against the front side head 82, the details of ‘which are shown in Fig of the front frame member 2-1, and a rear cover ure 8. ' ' 59 is adapted to engage against the rear side The head 182 is provided with an arcuate outer of the rear frame member 26. The cap or' plate 25 edge portion 83 having‘a notch or keeper 94 '49’ 'is- formed wants marginal-flange 5| engaging abou't'the housing '52‘ formed by the walls 135, 135 and 46 ‘and the .rear cover or plate 59 is ‘for-med therein. The head 82 also includes oppositely extending wings 85, the outer edge portions 88 of which provide a cam ‘surface, the purpose for with a marginal ?ange 53 engaging about the rear marginal portion of the housing 52. The bolts 49 30 which will be hereinafter described. The sec ondary lever 59 has mounted‘ on thefor'ward' side and 4| provide‘ a means for ‘securing the plates 49 and 59, respectively, and thefbo‘l'ts 42 and 43 provide means for securing the. lowerportion of the plate 44 on the frame structure.’ _ ‘ » thereof an elongated‘ plate 8'‘! which is formed with upper and lower elongated openings 88 and ‘89. A rear reinforcing plate '99 engages against the rear A main throttle lever 54 is rockably disposed 35 side of the secondary lever 59'and the two plates 81 and ‘99 are secured'to ‘the opposite faces of within the frame structure 25 being rockably ‘mounted on 'a tubular bearing member 55 which the lever 59 by upper and lower bolts or fasten is disposed between the twoframe members 29 ing members 9| and 92. The plate‘ '81 constitutes portion with a bearing '5'! rockably engaging the periphery of the sleeve or cylindrical bearing lower end with a pawl or tooth 94 engageable in the notch 84. The plate 8'! at its upper end a latching plate and has secured to ‘the forward and '27. The lever '54 is provided at; upper end-with a knob 59 and is provided at its’ lower__ 40 side thereof a block‘ 93 which is formed at its is ‘formed with a ?nger engaging member 95 memberv 55. An extension 58 extends down and.- is also provided with a pair of oppositely wardly'from the bearing portion 51 of the lever 54 and provides a means for attaching the con 45 extending ‘e'ars'95 and 97. The rear plate 99 is formed with a pairvo'f ‘ears 98 and 99 and a pair nections between the lever 54 and the throttle of springs I99 and I’9’I are connected to the ears lever of the carburetor. ' ' of the two plates 8'‘! and 99 andiconsta'ntly urge A pair of secondary levers 5'9 and’ 99 are rock the f-orwardl'atching plate 81 inwardly to nor ‘ably mounted on the cylindrical ‘bearing member . 55 on opposite sides of the main lever 54 and 50 mally maintain the bolt or tooth 94 in the keeper er notch 84. spaced laterally from the lever 54. The lever 59 The mainlever 54 has rockably mounted there on ‘a pair of bell cranks I92 and I93, ‘the bell ing connections to the-structure operated by the cranks being mounted on pivot means compris~ lever 59, and in the present instance, the lever 59 is connected with the supercharger structure. 55 ing a headed sleeve I94 which is extended‘through the ‘lever 54 and a headed screw "I95 ‘which is A spacing washer 92 is interposed between the threaded into the sleeve I94. Anti-friction balls lever 59 and the forward side of the rear frame is formed with a lower extension 9| for attach member 29, and a second spacing member 53 is vof'conventional construction are interposed be; tween the heads of the sleeve I94, the bolt I85 disposed on the forward side of the lever 59. A pair of friction washers 64 and 65 are interposed 60 and the adjacent sides of the bell cranks I92 and 9'9 and the adjacent sides of the'lever 5d. The between the spacing washers’52 and 93 and the bell crank I-'92 has rotatably mounted on one arm adjacent sides of the lever 59. The bearing mem thereof aroller I96 ‘which engages in the elon ber 55 has mounted in an annular channel 95 gated opening ‘8|. The other arm of the bell thereof a disc-shaped plate 91 formed with a central opening 98 and the opposite or outer end 65 crank I92 has rotatably mounted thereon a ‘roller I 9"! which engages in a ‘cam track I99 which is of the bearing member 55 also has mounted in formed in a longitudinally arcuate cam plate I991. an annular channel 69 an outer disc-shaped 'The cam plate I99 is mounted'in the opposite ends plate 19. The plate 19 has .a central opening thereof on the bolts '39, and preferably, a spacing ‘II and a bolt 72 is extended through the open sleeve H9 is interposed between the rear side of ings 58 and ‘H in the disc members 61 and 19, ‘re spectively, and is also extended through openings the cam plate I99 and the rear frame member ‘i3 and ‘I4 which are formed in the frame mem 29. bers 29 and 21. A nut ‘I5 is threaded onto the The cam track I98 adjacent one end thereof is formed with an enlarged track III, the pur whereby the desired friction may be applied ‘to 75 pose for ‘which will be hereinafter described. outer end of the bolt 12/an'd provides a means .15 9,406,872 This enlarged track portion III extends inwardly from the inner edge of the track I08 as shown in Figure 4. The cam track I08 provides a means whereby the bell crank I02 will be rocked on the pivotal support thereof carried by the main lever 54 when the main lever 54 is rocked or moved and the particular con?guration of the plate H9. The cam plate H9 is spaced from the cam plate I09 by a spacing sleeve_I20 andvis spaced from the forward frame member 21 by means of a spacing sleeve I2I. The pawl H4 is ?xed to a pawlcarrier or elongated plate I122 which is spring-pressed by means of a pair of springs I23 to latching position. The upper end track I08 will determine the particular differen of the carrier I22 is provided with a ?nger en tial. movement effected between the main lever gaging member I24 disposed in inwardly spaced 10 relation with respect to the knob I24. The ?nger 54 and the. secondary lever 59. 7 Referring now to Figures 11 to 16 inclusive, engaging member 95 is also inwardly spaced from the differential movement provided between the two levers 54 and 59 arediagrammatically laid a” knob I25 which is mounted on the outer end out. oflthe secondary lever 59. . . . ' In Figure 11 the twolevers are in their A spacing fring I26 is interposed between the ‘starting position and are laterally disposed in the 15 operator H3 and the forward side of the lever same-plane. . In Figure 12 it will be noted that 54 and anti-friction washers I21 and I28 are in the‘ secondary lever 59 is forwardly of the main terposed between the spacer I26 and the lever lever 54, the camtrack I08 being of such con 54 and the ring I26 and the operator II3 respec ?guration as to provide for an accelerated move tively. A friction ring I29 is interposed between ment of the secondary lever 59 for a portion of 20 the spacing ring 11 and the rear side of the lever the movement of the main lever 54 from its initial 54. A spacing ring I30 is interposed between the operator 1 I3 and the secondary lever 60, and a secondary. lever 59 is accelerated through'an are friction washer I 3| is interposed between the rear greater than the arc of the movement of the main side of the ring I30 and the forward side of the lever 54 and the secondary lever 59 is in substan~ 25 operator II3. A friction washer I32 is interposed tially .a vertical position, In Figure 13 it will between therforward side of the spacer I30 and be noted that further movement of the main lever the rear side of the secondary lever 60. . 54 from the dotted line position to the full line A supplemental lever I33 is rockably mounted position will provide for a decelerated movement on the bearing member 55 forwardly of the sec of the secondary lever 59, the secondary lever at 30 ondary lever 60 and is spaced‘ from the secondary this point being. laterally in the same plane of lever 30 by means of a spacing ring I34. A fric the main lever 54. Further movement of the tion washer I35 is interposed between the rear main lever 54, as shown in Figure 14, will provide side of the spacing ring I34 and the forward for the independent movement of the main lever side of ‘the lever 60 and a friction ring I36 is in 54 with the secondary lever 59 stationary. Addi- ' terposed between the forward side of‘ the spacer tional movement of the main lever 54 from the I34 and the rear side of the supplemental lever position shown in Figure 14 to’the full line posi I33. A forwardly disposed spacing ring I31 is tion shown in Figure 15 will provide for a sub interposed between the forward side of the lever stantially equal movement between the two levers I 33 and the lower portion of the frame mem 54 and 59. The position shown in Figure 15 is 4.0 ber 21. A friction washer I38 is interposed be the ?nal position of the main lever 54 and the tween the spacer I31 and the forward side of full line position of lever 59 is‘ the normal posi the lever I33. The lever I33 at its upper end tion of the secondary lever 59 when operated is provided with a forwardly projecting or right angular portion I39 which projects through an solely by the bell crank I02.‘ If itis desired to move the secondary lever 59 forwardly an addi elongated arcuate slot I40 formed in the cover tional distance or in the same lateral plane as plate 49. A knob I 4| is mounted on the forwardly the main lever 54, the secondarylever 59 may projecting portion I39 of the lever I33 and is starting position. In the present instance, the be pushed forwardly, this independent movement of the secondary lever 59 being permitted by the downwardly offset’ cam track portion III. As the secondary lever 59 is independently moved forwardly from its normal forward posi tion, the bell crank I02 will rock on the pivot thereof and the roller I01 will swing downwardly into the offset track portion I I I. This is accom 55 Zlésposed in forwardly spaced relation to the plate A longitudinally arcuate indicia bearing plate I42 is mounted on the forward side of the plate 49 adjacent the upper portion thereof and is provided with segments I43, I44 and I45 bearing indicia to indicate the action produced by the lever I33 in a selected one of its several posi plished without unlatching the secondary lever tions. The plate 49 adjacent the upper portion 59 from the operator 13. The extreme forward position of the secondary lever 59 is shown in in dotted lines in Figure 1, through which the thereof may be formed with a cutout I46, shown Figure 16 where the lever 59 is in the same lateral knob I 4| may be extended at the time the cover plane as the lever 54. The secondary lever 50 60 plate 49 is applied to the frame structure. The which is provided at its upper end with a knob plate 49 may be also provided with a forwardly I I2 is adapted to have differential movement with offset lower portion I41 which extends about the respect to the main lever 54 under the swinging forward end of the bolt 12 and the nut 15. or rotary action of an operator I I3 which is simi The lever I 33 is movable rearwardly of an elon 65 gated latching bar I41 which is secured between lar in every detail to the operator 16. The-lever 60 has slidable lengthwise thereof the upwardly divergent arms of the forward a dog or pawl I I4 engageable in the notch of the frame member 21. The bar I41 is provided be operator H3 in the same manner as the engage tween the ends thereof with a pair of rearwardly ment of the pawl 94 in the notch 84 of the head extending lugs I48 and I49. The lugs I48 and 92. The bell crank I03 has a roller II5 on one I49 are provided with cam-shaped rear sides I50 arm thereof which is disposed in an elongated and I 5|, respectively, so that when the lever I33 opening IIB formed in the operator “3. The is rocked on the bearing member 55, the lever I33 bell crank I 03 also has a second roller I I1 mount will ride over the cam face I50 and be disposed ed on the other arm thereof which is movable in the space I52 between the two lugs I48 and ‘in. an elongated cam track II8 formed in a cam 75 I49. When the lever I33 is to be moved out of rasoasva 8 the space I42. it must be forcibly pushed in wardly from the upper end ‘thereof, the lever I33 being of resilient material permitting it vto be sprung rearwardly and when held in its rear In the use and operation of this control .de vice, in, the starting positions of the main lever 54 and the ‘two secondary levers 59 and 60, all of these levers. ‘will be disposed at the extreme ward position, the lever I33 may then be rocked left position shown. in Figures .11 and 17. .For forwardly an additional distanceras for instance, to the position shown in Figure 7. When the ward movement of the main lever I54 to the right or in a clockwise direction will cause initial ac celerated movement of the secondary levers 59 and 58‘ as shown diagrammatically in Figures portions I56 and I5I, the particular cam por tion will forcibly bend the lever I33 until the 10 12 and 18 for one phase or cycle ofv the main lever 54. Additional forward movement of the .lever drops on one side or the other of the cam main lever 54 through another cycle will effect a portion. The lever I33 constitutes a mixture regulator for regulating the quantity of gasoline decelerated movement of the secondary lever 59 and an equal movement of the lever 60. Fur mixed with the air in the carburetor. Referring now to Figure 9, there is disclosed . ther forward movement of the main lever 54 amodi?ed form of secondary lever operator I53 will be effected without movement of the sec ondary lever .59, as shown in Figure .14, and in which .is formed with a head I54 similar to the head 82 with the exception that the head I54 thisv same movement, the secondary lever 60 will be on its deceleration cycle. Further movement .is .formed with a plurality of notches I55. The of ‘the lever 54 to its extreme right position, notches I55 provide a means whereby a secondary lever may be manually adjusted to any selected which is the position shown in Figure 15, will move the lever 59 at the same speed and through position with respect to the main lever so that ‘the same are and in this are of movement of the particular secondary lever may be either for the main lever 54, the secondary lever 60 will be wardly or rearwardly of the main lever 54 in the starting positions of these levers. It will, of 25 on the ?nal movement of the deceleration cycle, the latter lever being coplanar with the lever 54., course, be understood that the selected adjust as shown in Figure 20. ment of a secondary lever in its starting posi~ Lever 59 will be rearwardly of the lever 54, as tion. will also effect the ?nal position of the par shown in Figure 15 during the normal operation ticular secondary lever produced by the cam of ‘the lever 54. However, if it is desired to move tracks I68 and H8. lever 59 forwardly an additional distance, this iIn Figures 17 to 20 inclusive, there are dis may be ‘accomplished by manually rocking the closed diagrammatically the several positions of lever 59 forwardly to the position shown in Fig the secondary lever 56 with respect to the main ure 16. Where it is desired to move one of the lever 54. In Figure 17, two levers 54 and 65 are at the starting position and are laterally in the secondary levers, as for instance, lever 59 inde pendent of the main lever 54, this may be ac same plane. The ‘cam track I i8 is so constructed complished by‘ unlatching the secondary lever 59 as to provide for ‘the initial accelerated move from the operator 16. If, as an example, the mentof the secondary lever 65, the extent of this secondary lever 59 is moved forwardly from its movement being shown in Figure 18. In this ?gure, it will be noted that the main lever 54 ,r. C) starting position, the pawl .94 is pulled out of the notch 84 and the operator 16 remains stationary. has moved only for a very small portion of the When the main lever 54 is subsequently moved distance ‘from ‘its starting position, whereas the ‘forwardly the pawl or dog 94 will ride over the secondary lever has moved a considerable dis tance beyond the position of the main lever 54. cam face 86 of the head 82 and will drop into the notch .84 when the operator '16 is moved by means Additional forward movement of the main lever 54 will provide for equal vmovement of the sec of the bell crank I02 to its normal position with ‘respect to the secondary lever 59. ondary lever 66, as shown in Figure 19 in full Further ‘movement of the main lever 54 will lines, ‘and further forward movement of the main ‘move the secondary lever 59 therewith through lever 54 as shown in full lines in Figure 20 will provide for a decelerated movement for the lever ‘ the normal cycles of movement of the lever 59 ‘remaining to the terminal end of the movement 66, the latter lever lagging behind in its move ment and ?nally terminating its forward move of ‘the lever 54. It will ~be of course understood ment at the forward terminal end of the move ‘that the cam tracks I93 and II8 may be varied in their longitudinal con?guration to provide for ment of the main lever 54. The secondary lever 60 is adapted to be connected to a pitch chang the 'desired'cycles of movement of the secondary ing mechanism, formed as part of a propeller levers‘ with respect to the main lever. structure, and the accelerated movement of the The control herein disclosed has been designed lever 60 is provided in order to actuate the pitch particularly for use in airplanes to provide for a changing mechanism to the desired degree dur single control to operate the main throttle. the ing the speeding up of the engine. 60 supercharger and also the pitch changing mecha In Figure 10 there ‘is disclosed an internal com nism of the propeller. With this control, the op bustion engine I56 having a propeller I51 con erator need ‘only use one hand in effecting com plete control of ‘the operation of the engine and nected to the shaft I58 thereof, and a pitch changing mechanism I59 of conventional con the other ‘hand may be used for any other de struction forms part of ‘the propeller I51. A sired controls. supercharger shown diagrammatically at ISO is Referring now to Figures 21 to 23 inclusive, the connected with the engine I56, and a conventional numeral I65 ‘designates ‘generally a frame struc lever I33 is riding over either one of the cam carburetor I6I is also connected with the en gine I56. The secondary lever 59 is connected by means of a suitable linkage I62 to the super charger !63 and the main throttle lever 54 is con nected by a linkage I63 to the main throttle of the carburetor I6I. A linkage I54 connects the secondary propeller pitch adjusting lever 65 to the pitch changing mechanism ‘I59. ture which includes a rear frame member I66 and a forward frame member I61. The frame ‘members 166 and I61 are of like construction and each includes a pair of upwardly divergent arms I68‘ and IE9 which are connected together ‘at their upper divergent ends by means of an arcuate connecting bar I16. The divergent ends " of the arms I68 and I69 are formed integral with N . 9» 2,406,872 _ . . 1b? , a circular plate I11; whichis provided with a pair of ears?'I12 _a‘_nd'll13. The frame members I66 and I 61 are held in spaced‘ apart relation by lever- I99 is determined by the con?guration of upper spacing‘ members I14 ‘which are secured to formed at the left end thereof with an arcuate 3' cam portion 295 which extends upwardly and‘ the divergent‘ends of the ‘armsjI?il and'I69 by fastening means_I_1-5.,_ The ‘lower portio-nof the the cam track I98." - In the‘present‘ instance, the‘ cam track I98 is . frame I95‘ is'held in spaced relation by means of then‘merges‘as-at 296 in a reversely curved cam portion 291.“ This latter reverseiy curved portion spacer members 616 secured between the ears 281 provides for the decelerated movement of the I 12 and I13 by fastening members I11. secondary lever I99 during the latter part of the A cylindrical hub or pivot member I18 is dis 10 rocking movement of the main lever I83. The posed between the plates I11 and the opposite ends upwardly curved cam portion 285 provides for of the stationary pivot member I18 are provided the accelerated rocking or movement of the sec with recesses I19 in which a plate I89 engages. ondary lever I99 during the initial rocking or A bolt I8I extends through the center of the end movement of the main lever I 83. plates Ill and also through the plates I89 and 15 The operation of the modi?ed form of control is provided at one end thereof with a nut I82 shown in Figures 21 to 23 inclusive is similar to so that the plates I89 may be pushed inwardly that in the preferred form in that the main lever to apply the desired friction on the respective I83 at its starting position will be disposed at the levers which are pivotally mounted on the sta extreme left of Figure 21. In this position the tionary cylindrical member I18. 20 secondary lever I99 will have the arm I94 there A main lever I83 which is provided with a ring of raised and as the main lever is moved to the shaped hub I84 is rockably mounted on the cy right, the cam plate I91 will be rocked downward lindrical member I19 and is provided at its lower ly, the con?guration of the cam portion 295 being end with an extension I85 formed with a plu such as to provide for rocking of the secondary rality of openings I86 to which suitable connec 25 lever I99 at a speed slightly greater than the rock tions may be secured to provide for the desired ing or swinging of the main lever I83. When operation of the parts connected with the main the roller 293 engages in the merging portion 296 lever I83. The lever I93 is disposed in forwardly between the cam portions 295 and 291, the cam spaced relation to the rear plate I81 formed by plate I91 will be substantially motionless but the rear frame member I69 by means of one or 30 when the roller 293 engages in the reversely more cylindrical spacer members I88. The spacer curved cam portion 291, the cam plate I91 will member or members I89 are mounted on the sta tionary member I18 and a friction washer I89 is interposed between the spacer member I88 and the rear side of the hub I84 of the main lever 35 I83. eifect movement of the secondary lever I99 at a speed less than the movement of the main lever I83. What I claim is: l. A control device comprising a main lever, a A secondary lever generally designated as I99 secondary lever, an operator for said secondary is rockably mounted on the stationary member lever, latch means connecting said operator with I18 forwardly of the main lever I83. The sec said secondary lever, a bell crank pivotally car ondary lever I99 as shown in Figure 23 is con ried by said main lever, means carried by said structed in the form of a bell crank, being pro bell crank engageable with said operator for mov vided with a ring-shaped hub I 9| which rock ing said operator upon rocking of said bell crank, ably engages the stationary member I18 and the and stationary cam means engageable with said hub 19! has a radially disposed arm I92 provided bell crank to eifect rocking of the latter upon with openings I93 for receiving conections to 45 movement of said main lever. ‘ the desired parts operated by the lever I99. The 2. A control device comprising a main lever, a lever I99 also includes an arm I94 disposed at secondary lever, an operator for said secondary right angles to the arm I92 and provided adja lever, a notched head carried by said operator, 2. cent the outer end portion thereof with an open spring-pressed latching dog carried by said sec ing I95. The secondary lever I99 is adapted to ondary lever engageable with the notch of said be rocked with the rocking or swinging movement head, a bell crank pivotally carried by said main of the main lever I83 by means of a pivoted cam lever, means carried by said bell crank engage element I99. The cam element I96 includes a able with said operator for moving said operator cam plate I91 which is formed with a cam track I198. The cam plate I91 is provided with an elon gated extension or arm I99 which is pivotally mounted on one of the securing members or bolts I15. The cam plate “31 at the opposite end thereof has pivotally secured thereto as at 299 the upper end of a link 29I. The lower end of the link 29! is pivotally secured as at 202 to the arm l94, the pivot member 292 engaging in the opening I95. The main lever 883 has mounted on the for ward side thereof a roller 293 which movably en gages in the cam track I99. The roller 293 is mounted on a pivot member 294 which is carried by the forward side of the main lever I83. It will of course be understood that one or more secondary levers may be mounted on the station ary pivot member I18, it only‘ being necessary to duplicate the construction shown in Figure 22 on the opposite or left side of the main lever I83. upon rocking of said bell crank, and} stationary cam means engageable with said bell crank to effect rocking of the latter upon movement of said main lever. 3. A control device comprising a pair of sec ondary levers, a main lever, and means correlated with said secondary and main levers providing a differential movement of said secondary levers relative to said main lever, said means including means providing differential movement of one secondary lever relative to the other secondary lever, said ?rst mentioned means also including releasable latching means whereby one secondary lever may be moved independently of the other secondary lever or the main lever. 4. A control device comp-rising a main rock lever, a secondary rock lever swingable about the pivot of said main lever, and means correlated with both of said levers, providing differential movement of said secondary lever with respect to said main lever, said secondary lever moving The desired rocking movement of the secondary 75 in the same direction as and upon movement of - 2,406,872 11. said, main lever, said levers being initially posi tioned in substantially side by side relation, said means being so constructed and arranged that said levers will also be positioned in substantially side. by side relation at they end of their move‘ ment, said means including a stationary cam, a rock member carried by said main lever, means 12 carried. by said rock member engaging said cam whereby to rock said rock member upon move-1 ment of said main lever, and a second means car ried by said rock member operatively connected ; with» said secondary lever whereby rocking of said rock member will ‘also move said secondary lever. PHILIP M. WAITE.