Патент USA US2133822код для вставки
oct. 1s, 193s. R Q_ ._AMOND ' 2,133,822 HOISTING MECHANI SM Filed NOV.` 2l, 1935 ßy/ _ 4 Sheet:§-Shee‘b l Oct.l 18, 1938.* R. c. LAMOND HOISTING MECHANISM Filed Nov. 21, 1935 4 Sheets-Sheet 2 57 l ____ W@ w, l m l ll/IÍllI/Í l ’lll/ß mi lllllllllllllllllll ’llllllllllllll y v QZ0120./ Oct, 18, 1938. R. c. LAMOND 2,133,822 HOISTING MECHANISM Filed NOV. 21, 1955 ’ 4 sheets-*sheet 4 ._ m3 NS hä DE, 2,133,822 Patented Oct. 18, 1938 UNITED STATES PATENT OFFICE ` ` 2,133,822 HOISTING MECHANISM assignor to Robert C. Lamond, Philadelphia, Pa.,Philadelphia, American Engineering Company, Pa., a corporation of Pennsylvania , Application November 21, 1935, Serial No. 50,856 23 Claims. (Cl. 251-172) This invention relates to hoisting apparatus, and more particularly to hoisting apparatus em ployed on board ship or on Wharves, for handling boats, airplanes, and other floating objects. In devices of the stated character, after the object to be hoistedhas been brought adjacent shown and described in United States Patent No. 2,013,690, to which reference may be had for a full disclosure thereof. Referring to the drawings, the numeral I desig the ship or wharf on which the hoisting appa ratus is mounted, the cable is first attached thereto. Due to the action of the Waves, sudden ¿strains are imposed upon the cable, as well as nates a crane comprising a mast 2, and a boom 5 3. the object because of the bobbing action thereof, as well as the rolling and pitching of the ship. These sudden strains often cause either snapping of the cable or serious damage to- the object han dled. This is especially true in connection with airplanes, since the construction thereof is not sturdy enough to withstand sudden strains. One object of the present invention is to pro vide automatic means for operating the winch . to pay out cable when sudden loads are imposed thereon, and to wind in cable when any slack occurs therein. Another object is to provide a novel mechanism for controlling the operation of such automatic means. A more specific object is to provide in appara-y tus of the stated character, differential gearing between the winding drum of the winch and the operating mechanism therefor, and automatically controlled electrohydraulic means for effecting actuation of the winding drum to pay out or wind in cable independently of the operating mech anism. ` Other and further objects will become appar ent as the description of the invention progresses. 35 Of the drawings: ' Fig. 1 is an elevational view of the hoisting ap paratus to which the present invention is ap plied. 40 The lower end of mast 2 is mounted in a thrust bearing 4 and extends upwardly through a supporting structure 5, machine platform >6, Fig. 2 is a plan view of one of the Winches hav ing associated therewith my improved tensioning device, some of the parts thereof being shown in section. Fig. 3 is a side elevational view partly in sec tion of the automatic tensioning device showing 45. . certain of the control elements associated there with. Fig. 4 is a side elevational view partly in sec tion of the mechanism for controllingthe strok ing of the main pump of the hoisting apparatus, and Fig. 5 is a side elevational view partly in sec tion of a modified type of tensioning device. >The hoisting apparatus to which the present 55.12 invention is applied is generally similar to that and an auxiliary platform 1. Platforms 6 and 1 are secured to the mast 2 by any suitable means. 10 The mast 2 is provided with a lateral thrust bear ing 8 intermediate the ends thereof, which op erates in a race 9, mounted at the upper end of a supporting bracket I0. The boom 3 is pivotally supported at the lower end thereof `in bearing 15 brackets II secured to the platformk 6, as shown in Fig. 1. Mounted in a suitable framework I2, secured to brackets» I0, is an internal gear I3 which meshes with a pinion I4. Pinion I4 is se cured to the driven shaft I5 of an operating 20 ’ mechanism I6 for rotating platforms E and 1 and mast 2 in a well known manner. Operating mechanism I6 is secured to a framework I1 and machine platforml 6 in any suitable manner. Operatively associated with mast 2 and boom 3 25 are three Winches I8, I9 and 20 respectively. Winch I8 is mounted in a suitableframework 2I secured to and extending upwardly from plat form 1, and is employed forl the purpose of swinging boom 3. W'nches I9 and 20 are 30v mounted respectively in frameworks 22 and 23 ' secured to and extending upwardly from ma chine platform 6. Winch I9 in the present apparatus is employed for handling airplanes and will be hereinafter 35V referred to as the airplane winch, while winch 2li is employed for handling boats, such as tend ers, and will hereinafter be referred to as theV boat winch. A cable 24-extends upwardly from the winding 40 drum 25 of winch I8 and is trained around dif ferential pulleys 26 and 21, the former being rotatably mounted vin a bracket 28 secured to the top of mast 2, while the latter is similarly mounted in a bracket 29 secured to boom 3, 45 and the end of the cable is secured to a bracket 30 secured to andv extending laterally of mast 2. A cable 3l extending from the winding drum 32 of airplane winch I9 is trained around a sheave 33 rotatably mounted in suitable bearings pro- 50, vided near the upper end of boom 3 and the end thereof is provided with the usual hook 34. A cable 35 also. extends from the winding drum 36 of boat winch 20 and is trained over guide _rolls 31 and 38 provided in boom 3, and thence around 55 2 - 2,133,822 sheave 39 rotatably mounted in a bearing bracket 404 secured to boom 3 a short distance from the upper end thereof. The cable 35 is then trained around differential pulleys 4| and 42 and the end thereof is secured to a block 43 mounted on pulley 4|. Pulley 42 is rotatably mounted in a bracket 44, secured to boom 3, while pulley 4| is suspended therefrom by cable 35 and the lower end of block 43 mounted thereon is provided with 10 the usual hook 45. Winches |8, | 9 and 20 are respectively driven by fluid motors MI, M2 andv M3 through reduction gearing designated gen' erally by numerals 46, 41 and 48. Fluid motors ' Ml, M2 and M3 are operated by pumps Pl, P2 and P3 through piping connections49, 50 and 5|. Pumps PI, P2 and P3 may be interconnected for simultaneous operation by suitable driving means such as an electric motor, or» separate driving means may be provided for each of said pumps. matic tensioning device designated generally by 60, 64, 65, 10, 'H and 15, just described. Control lever 55 is secured to a shaft 55a suit ably journaled in a bracket 55h, secured to and depending from platform -I. Secured to and de pending from shaft 55a is an arm Tl, at the free end of which is pivotally connected one end of a link 18, the other end ofY which is pivotally con nected to the free end of an arm '|9, secured to a shaft 80 journaled in a second bracket 8|, also secured to and depending from said platform 1. A substantially horizontal arm 82 is also secured to- shaft> 80 and has pivotally connected to the free end thereof a yoke 83, secured to a cross bar 84. The opposite ends of cross bar 84 have se cured thereto theï upper ends of a pair of guide rods 85, the lower ends of which being connected Pumps PI, P2 and P3, and motors M|`,- M2V and M3 are of the variable stroke reversible discharge type shown and described in UnitedStates Patent No. 1,077,979 to which reference may be had for a full disclosure thereof. In pumps of this char acter it is Vwell known thatupon adjustment of certain controls therein to one’ position from neutral causes the pump to discharge in one direc tion, and when said controls are adjusted in the opposite direction from neutral position the. pump will discharge in the reverse direction. In this manner the direction of rotation of the motors driven thereby may be controlled. In the present instance control levers 55 are pivotally supported on the platform '|, each having a link 35 and lever mechanism associated therewith opera tively connecting the same to the controls of the pumps PI, P2 and P3. By manipulation of these control levers 55 the boom 3 may be swung up or down by the operationl of winch |8, while Winches 40 |9 and 20 may be operated respectively to- either wind in or pay out cable therefrom. In the present» case the boat and airplane Winches have each associated therewith an auto the numeral 56 for maintaining the cable taut under operating conditions. Inasmuch as the automatic tensioning device, as well as the apparatus generally associated with the winch, is similar in each case, a description of the structure and» operation of the mecha nisms associated> with the-airplane winch will suf fice for both. For clarity only the controls for the transmission associated with this winch are shown in Figs. 2 to 4 of the drawings. 55 Referring more particularly to Figs. 2 and 4, it therefore is seen that when ring gear '|4 is held stationary, winding drum 32 will be actuated upon operation of motor M2 through the gearing 59, to the sliding block 86 of pump P2 in a well known manner. A manually operable latch 81 provided on lever 55 is adapted to engage in a notch 88v provided in a latch plate 89, mounted adjacent to lever 55, when the slidingA blocks 86 of pump P2 are in neutral position. Upon releasing latch 87 lever 55 maybe swung in either direction about its pivot to so adjust the sliding blocks 86 of pump P2 as to control the direction of rotation of winding drum 32. The automatic tensioning device associated 30 with the winch just described consists of an hy draulic transmission 90 driven by an electric mo tor 9|.. In the present instance the transmission 90 and motor 9| are enclosed within a common casing. The drive shaft 92 of the hydraulic mo 35 tor end of transmission 90 has keyed> thereto a worm gear 93 adapted for axial movement on said shaft. A rodA 94 is secured at one end to worm- gear 93, the' other end being slidably mounted in a guide bracket 95 secured to the other side of the casing 96 housing the differen tial gear 69. A coil spring 91 surrounds rod 94 and extends between the right hand end of gear 93 and the upper right hand side wall 98 of casing 96. An extension 99 is provided at the left end of gear 93 (Fig. 3) having a circumfer ential groove |00 provided therein for receiving a pair of rollers |0| mounted at the lower ends' of the legs of a yoke |02. Yoke |02 is secured to the lower end of the substantially vertical arm |03 of a bell crank lever |04 pivotally supported on a vertically extending bracket |05 securedV to the upper end of casing~ 96 in any suitable man ner. lI-‘he free end of the substantially horizontal arm |06 of bell crank |04 has pivotally sup' 1s ' seen that an electric motor 5l is operatively ' ported thereon the upper end of a guide rod |01 connected to pump P2 by any suitable coupling secured to and extending upwardly from the means 58. The motor M2 driven by pump P2 sliding block |08 of the pump end of transmis through the piping connections 50 has provided sion 90. Rod 94 has secured thereto near the~ on the drive shaft thereof a pinion 59 which right hand end thereof a collar |09 adapted' for 60" meshes with a gear 60 secured to a shaft 6|'. engagement in notches ||0 provided in the up Shaft 6| is mounted in suitable bearings 62 and per end of a yoke || |. Yoke || | is secured to thev 63 and has secured thereto intermediate its ends upper end of a rod ||2 guided for vertical move a pinion 64 which meshes with a gear 65. Gear 65 65 is rotatably supported upon a shaft 69, jour ment in a bearing bracket ||3 secured tothe right hand side of casing 96. The lower end of rod>> | I2 has pivotally connected thereto the upper Shaft 66 extends through differential gearing |39v end of a link || 4, the lower end of which being' and winding drum 32. Gear 65 has secured there naled at the ends thereof in bearings> 6l and 68. to a bevel gear 'l0 which meshes with a series of 70 smaller bevel gears 1| >rotatably'-journaled on‘ pintles 'l2 of a spider 'I3 rotatably mounted on shaft 96. The outer ends of‘ pintles 'l2 are secured' to worm wheel 'I4 and in any suitable manner'. Gears '|| also mesh with a bevel gear 'l5 secured 75 .to the hub portion 16' of winding drum 32. It pivoted to the outer end of anV arm | I5 secured to a shaft I|6 journaled in a bracket |I`| secured to and depending from platform 1. Shaft ||6- has also secured thereto a second arm ||8 hav ing pivotally supported at the free end» thereof one end of a link ||9, the other end of which be ing> pivotally connected to the lower end of an arm |20 secured toa shaft |2l|, journaled in aV 3 2,133,822' second bracket |22, also secured to and depend ing from platform 1. A control lever |23 is also secured to shaft |2I and extends vertically through platform 1 adjacent a latch plate |24 having notches |25, |26 and |21 respectively, provided therein. Lever |23 has also provided thereon a manually operable latch |28 adapted to engage in said notches |25, |26 or |21. Fig. 3 shows latch |28 in engagement with notch |26, When this occursspring 91 will urge worm gear 93 to the left (Fig. 3) causing ring gear 14 to rotate in a counterclockwise direction. The small bevel gears 1| will now simply roll on the larger bevel gear 1|0 of the differential gear 69, impart ing rotary movement to bevel gear 15, causing a slight rotation of the winding drum 32. When worm gear 93 moves in this manner bell crank |04 will be rockedin a clockwise direction, caus at which time the collar |09 on rod 94 bears against the left hand edge |29 of the extension |30 of yoke I||. At this time worm gear 9,3 can only move to the left by the action of spring 91. When lever |23 is so adjusted that latch |28 engages in notch |25, yoke ||| will have been moved downwardly so as to permit worm gear 93, as well as rod 94, to move to the right by the action of gear 14, and also to the left by the action of spring 91. Lever |23 is adjusted to this position when the hoisting cable 3| is attached to the airplane so that transmission 90 will so operate the differential gearing 69 as to wind in cable when slack occurs therein and to pay out » cable when a predetermined load is imposed When lever |23 is adjusted so that I thereon. latch |28 engages in notch |26, as pointed out before, worm gear 93 can not slide to the right so as to pay out cable. Accordingly, lever |23 is adjusted to this position when it is desired to hoist the craft on board ship. When lever |23 is so adjusted that latch |28 engages in notch |21, yoke | | | will be moved upwardly so that the collar |09 will engage in notches ||0. When in this position worm gear 93', as well as rod 94, is held against movement in either direction. Lever |23 occupies this position when it is desired to operate the winch without the use of the ten» sioning device, or when cable is being paid out so as to permit attachment of the hook thereon to the airplane. From the above description of the structure of my improved apparatus the operation thereof is thought to be clear. However, in order to corre late the various elements just described, a brief description of the operation of the apparatus as a whole will now be given. Upon energization of electric motors 51 and 9|, the cylinder bodies associated with pump P2 and the pump end of transmission 90 respec tively, will be rotated. Lever |23 under these preliminary conditions is adjusted so that latch |28 engages in notch |21 of latch plate 24. Latch 81 of lever 55 will now be released and the latter swung in such a direction as to cause pump P2 to actuate motor M2, which through gearing 59, 60, 64, 65 and 69 will cause winding drum 32 to pay out cable so that the hook 34 thereon may be attached to the airplane. Lever |23 is now actuated to the left (Fig. 3) until latch |28 engages in notch |25, at which time ing adjustment of the sliding block |08 of the 10T pump end of transmission 90. When this occurs the motor end of the transmission will rotate the shaft 92, as well as worm gear 93 and inasmuch as bevel gear 10 is held against movement, as previously described, winding drum 32 will be 15 actuated by bevel gears 1| operating on bevel gear 15 in such a manner as to wind in the cable 3| to take up the slack therein. On the other hand, when a load is imposed on cable 3|, winding drum 32 will tendV to rotate 20" bevel gear 15 in the’ reverse direction, which movement is imparted to small bevel gears 1|, which roll on bevel gear 10 and tend to rotate ring gear 14 in the reverse direction. This action Y causes a sliding movement of worm gear 93l to the right (Fig. 3) against the action of spring 91. ’ When the load imposed upon the cable exceeds a predetermined value, as determined by the tension of spring 91, worm gear 93 will be moved further to the right. This movement is imparted 30 to bell crank |04 which adjusts sliding blocks |08 in the opposite direction. By this action the operation of the motor end of transmission 90 will be reversed, and worm gear 93 will now rotate in the reverse direction, causing winding drum 32 35 to pay out cable. In this manner the cable 3| is maintained taut and damage thereto, as well as to the object being handled, is prevented. When it is desired to hoist the airplane on board ship, lever |23 is actuated to position shown in Fig. 3, at which time latch |28 engages in notch |26. Worm gear 93, as well as rod 94. is thus prevented from movement to the right from a neutral position so that the pump end of trans mission 90' can not now be so adjusted as to cause an operation of drum 32 in the direction for paying out cable. Lever 55 is now releasedl and so adjusted as to operate the sliding blocks 86 of pump P2 in such a manner as to cause motor M2 to operate inthe reverse direction, which through the train of gearing, previously described, will rotate winding drum 32, causing the latter to wind in cable and thereby enable hoising of the airplane on board ship. When= the airplane has been hoisted a sufficient distance above the water so as to clear the deck, the boom 3 is swung inboard. Lever 55 is then actuated in the reverse direction to permit winding drum 32-to pay out cable so that the airplane may be landed on the deck of the ship. Y lyoke ||| will be actuated downwardly to permit Fig. 5 shows a modified type of tensioning de worm gear 93, as well as rod 94 to move in either vice which employs power means for placing the pump end of the transmission on stroke‘in either direction to cause the associated winch to wind in or pay out cable. As shown therein, an electric motor 9|’ drives the hydraulic trans mission 90’. The drive shaft 92’ of transmission 90' has keyed thereto a worm gear 93’ adapted for axial movement which meshes with the worm wheel 14" >of the differential gear. Worm gear -pump P2 and motor M2, and gears 59, 60, 64 93’ has secured thereto one end of a rod 94' which and 65, and bevel gear 10 of the differential gear is journaled in the upper right hand wall 98’ of casing 96' .and in bracket 95’. Rod 94’ has 69 will also be held against movement. Now let us assume that slack suddenly occurs secured thereto a collar |09’. which is adaptedv to engage in the notches ||0' of a yoke lll', se 75. `-in the cable due to the action of the waves. direction. However, when sufficient cable has been unwound from drum 32 to enable attach ment of hook 34 to the airplane, lever 55 is then 65 swung to normal position shown in Fig. 4, at which time latch 81 enters notch 08 of latch plate 89 and the 'pump is then restored to neutral position. Motor M2 will then remain at rest, since an hydraulic lock is provided between 70 60 2,133,822: cured tot the.' upper endl of a~ rod` |.|2’ journaledY inlguiderbracket ||3f secured' to. casing 96'. A coil spring 91’ encircles rod 94’ and extends be tween worm gear 93' and the wall 98' of casingV 96.'. In this construction axial movement is im. parted to Worm gear 93' by spring 91', and gear 14.’ inthe same manner as is done by> spring 91 and gear 14 respectively, of the construction shown in Figs. 1 to 4. Yoke |||_’ is also similarly 10? adjusted to control the axial movement of worml gear 93. In this construction instead of the axial movement of worm gear 93" being directly imparted to the sliding blocks |08’ of the pump end of the transmission, said movement is im parted to a Valve |'40'which controls the operation of a pairY of fluid motors |4| and |42. Valve |40 comprises- a‘casing V|43 having a longitudinally extending chamber |44 centrally thereof in which operates a valve member |45. 203 Casing- |43 has provided therein ports | 46, |41, |48 and |49'- Valve member |45 comprises a pair of interconnected Valvev heads |50 and |5|. A valve rod |52 extends through the right hand end of casing> |43 and has a laterally extending pin |53 provided at the outer end thereof which en gages in a slot |54 provided in the upper end of a lever |55. Lever |55.y is pivoted intermediate its ends to av bracket |561 extending upwardly from casing 96’ and the lower end thereof is 305 provided‘with a yoke |51 which receives the upper end- of collar |09’. It therefore is seen that any axial movement imparted to gear 93' and rod 94’ is imparted to valve member |45.- Motors |4| and |42 comprise cylinders |58 and | 59 having pistons |60 and |6| respectively operating there in. The-piston rods |62 and |63 respectively of pistons |60 and |6| are secured at one end there of to the sliding'V block |08' of the pump end of transmission 90'.' Secured to the upper end of 40? cylinder |58 is a second cylinder |64 having a piston |55 operating therein. The lower en'd of the piston rod |66 of piston |65 is adapted to engage the upper end of piston |60. Cylinder | 59~has secured to the lower end thereof a second 45. cylinder |61 having a piston» |68 operating there in; The upper end of the piston rod |69 of piston |68V is adapted tov engage the lower end of piston |6|. A- pipe |10 extends from port |46- of valve |40 to the upper end of cylinder | 58, and a branch pipe |1~|« connects pipe |10iwith thev upper'.- end of cylinder |64. A pipe |112' extends-from port |48V of valve |40 to the lower'end ofl cylinder |61, and a branch pipe |13 connects- pipe- |12 to the lower endof cylinder |59. A pipe l14-extends from port |41» of'valve |40 to a small pump |15 mounted at one end of the armatureshaft of .motor 9|". chamber V| 44 thereof from: pump |15 tol pass through said ports and enter cylinders |58, |59, |64 and |61 through the piping connections pre viously described. When this occurs equal pres sures will be exerted at the upper and lower ends of sliding blocks |08’ thereby retaining the same , in neutral position. Now let us assume that yoke ||`|’ has been` moved downwardly so that the extension |30’ thereon is moved out of engagement withcollar |09', and that slack occurs in the hoisting cable.. Spring 91’ will now urge gear 93' to theA lefty causing' lever> |55 to be actuated in a clockwise direction by collar |09', thereby shifting valve member |45 to the right. When valve member |45 is so actuatedvalve head |50 willprevent the' passage of ñuid from chamber |44 to port |48. Fluid from chamber |44 now enters cylinders |58- and |64 only through pipes |10 and |1|-, causing pistons |60 to actuate sliding block |08’ down wardly to place the pump on stroke. The motor endof transmission 90' will now rotate worm gear 93l which through the differential gearing will actuate the Winch to Wind in cable, therebytaking up the slack therein. Fluid from cylinders |59 and |61 will now ñow through branch pipe |13, pipe |12, port |48, and into the left hand end of chamber | 44. »A relief valve |86 is.- pro vided at the left hand end of valve |40. This valve is of usual construction andv comprises aV normally seated valve member |81ihaving a valve stem |88 secured theretowhich extends through the central bore of. an adjustable plug |89, making threaded engagement with the left hand> end of the. casing of said cylinder. extends between the inner end of plug |89 and 35 valve member |81. The tension of spring |90 may be adjusted by simply' rotating> plug- |89. When the pressure at the left hand’ end of cham ber |44 is suflicient to overcome the tension of spring |90, the iluid from> cylinders |59 and- |61 40 will discharge through port |49, and thence flow to makeup tank |16 through valve |86 and a. pipe |9|. Now let us assume that the cable of the'winch is subjected to a predetermined load. Under such 455 conditions gearv 14', as previously described, will actuate worm gear 93’ to the right against theV action of spring 91', causing lever |55 to swing in - a counterclockwise direction, thereby shifting valve member |45 to theV left.. When this occurs 50? fluid will ñow from central-chamber |44 through> pipes |12 and |13 to cylinders |61 and' |59,- caus ing sliding blocks |08’V to be actuated upwardly, thereby reversing the dischargek of the- pumpl end of transmission 90' which in turn causesA a' re verse operation of' the motor end thereof. Worm Pump |15 receives fluid such as oilfrom a makeup > gear 93’ will now operate in the'reverse direction tank |16 through» a pipe |11'~ An adjustable to cause the winch to pay out cable. Fluid from relief valve |18 is connected to pipe |14 by a cylinders | 58 and |64 will now flow through pipes branch pipe |19, and a discharge pipe |80 con |10 and |1| to the right hand end of chamber |44` nects the lower endV of said valve with makeup of valve |40, thence through a passage |î92', lport tank |16. Relief valve |1`8~ is of usual construc |49, valve |86, pipe |9|, and into-makeup tank‘ |16. tion and comprises a normally seated valve mem When yoke | l I" is in the position shown in Fig; ber’ |8| having a Valve stem- |82 which extends 5, the inner surfaces |29" ofthe extension |30'Y through the central bore of a plug |83 making thereof engage the right hand side of collar |09", ' threaded engagement with the’lower end of valve thereby preventing axialmovemen't of rod 94’ and |18. A coil spring |84- encircles valve stem |82 worm gear 93' tothe right. 'I'he device is now and extends between Valve member |8| and the unable to be so operatedl as to 'cause the winch to upper end of plug |83. Thus, by adjusting plug pay out cable. When yoke |||' is moved up |83 the tension of spring |84 may be varied. Fig. wardly to its third position of adjustmenlgcollar 70 l 5 shows the parts in normal position at which |09’ engages in notches | I0’ and as a result wormy time it will be noted that ports |46 and |48 of gear 93', as well as rod 94' areheld against moveF valve |40 are slightly uncovered by valve heads ment. Relief valve |18 operates to bypass ñuid 75.' |50f-an‘d |5|, permittingfluid entering the central from pump | 15 _to> makeup tank |16 when the 5 2,133,822 -pressure in the hydraulic circuit exceeds the value required to eiïectively control the operation of transmission 90', thus preventing damage to the apparatus. The function of valve |86 is to pre vent undue leakage of fluid from the hydraulic circuit. The tension of spring |90 in said valve is so adjusted as to require but little effort to unseat valve |81. Thus the pressure at the ends of valve member 4|45 will not be suñiciently great to counteract, to any material degree, the axial movement of gear 93'. While the embodiments herein described are tioned transmission for controlling the operation admirably adapted to fulfill the objects previously stated, it is to be understood that the invention is not to be limited thereto, since it may be em bodied in other forms, all coming within the scope of the claims which follow. What is claimed is: of the latter, said automatic means including an axially movable member, and mechanism mov able tol three positions of adjustment for con trolling the operation of said member, said mech anism when moved to one position of adjust ment permits said member to move axially in either direction from. a vneutral position, when moved >to a second position of adjustment said mechanism permits movement vof said member in one direction only from‘said neutral position, and when moved to a third position of adjust ment said mechanism locks said member against `movement `in'- either direction. 5. In a device Aof the class described, the com bination'rofl a' Winch, including a cable winding , 1. In a device of the class described, the com bination with a winch, including a cable wind drum., power ‘means for actuating said drum to wind in or pay out cable, differential gearing 4disposed >between said winding drum and power ing drum, of an hydraulic transmission for actu means, a second power'means operatively con nected to said differential gearing, automatic means disposed between said gearing and said second mentioned power means for controlling between said drum and transmission, a second the operation of the latter; said automatic means hydraulic transmission for operating said wind including a wormgear operatively connected to 525 ing drum independently of said first mentioned said differential gearing and adapted for axial hydraulic transmission, means operatively con movement in either direction from a neutral po necting said second hydraulic transmission to sition, adjustable manual mechanism for con said differential gearing, and means actuated by trollingA the axial movement of said worm. gear, said last mentioned means for controlling the movable to'three positions of adjustment, said operation of said second hydraulic transmission. mechanism when actuated to one position of 2. In a device of the class described, the com adjustment permits movement of .said worm gear bination with a winch including a cable wind in either direction from ya neutral position, when ing drum, of an hydraulic transmission for actu said mechanism is moved to ya second position of ating said drum to wind in or pay out cable, dif adjustment said worm gear is adapted for axial 35 ferential gearing disposed between said winding movement in one direction only from.V a- neutral drum and hydraulic transmission, means for con position, and when said mechanism is actuated to trolling the operation of said transmission, a a third position of adjustment said worm gear second hydraulic transmission for operating said is locked against axial movement in ‘said neutral Winding drum, a member adapted for rotary and at ating said drum, differential gearing disposed axial movement disposed between said hydraulic second transmission and said dìiîerential gear ing, and means actuated by said member for con trolling the direction of rotation of said second hydraulic transmission. position. ' ' ’ ' . 6. In a device of the class described, the corn binationof a winch, including a cable Winding drum, power means for actuating said drum to wind in or pay out cable, differential gearing disposed` between said winding drum and power 3. In adevice of the class described, the com bination of a winch, including a cable winding drum, power means for actuating said drum in means, including a- worm wheel, an hydraulic transmission for actuating said winding drum in either direction, diiîerential -gearing disposed be for said hydraulic transmission, a worm. gear tween said drum and power means, a second power means operatively connected to said gear 50 ing for actuating said drum in either direction, automatic means for controlling the operation of said second power means, and control mecha nism for said automatic means having three po 55 sitions of adjustment, said mechanism. when actuated to one position permits movement of said automatic means in either direction from a neutral position to control the operation of said second mentioned power means, when moved to 60 a second position, said mechanism permits move dependentlyv of saidpower means, a drive shaft mounted for axialimovement keyed tov said drive shaft and meshingwith said worm wheel, where by rotation of :said-shaft causes rotation of said worm gear and-worm Wheel, mechanism opera tively connecting said'wórm gear to said trans mission whereby axial movement of said gear 555 controls the> operation of said transmission, means for controlling the axial movement of saidworm gear comprising a latch member, a rod secured to said worm gear having a collar there on adapted to engage said latch member, said 60 latch member being adapted for three positions ment of said automatic means in one direction of adjustment, when moved to one position of only from said neutral position, and when moved , adjustment said latch member is out of engage to a third position said mechanism locks said ment with said-"collar thereby permitting said automatic means against movement in either di worm gear tomove in either direction from a 65 65 rection. neutral position, when moved to a second posi 4. In a device of the class described, the com bination of a winch, including a cable winding drum, an hydraulic transmission for actuatin-g said drum to wind in or pay out cable, differen 70 tial gearing disposed between said winding drum and hydraulic transmission, means -for controlling the operation of said transmission, a second hy draulic transmission operatively connected -to said differential gearing, automatic means dis 75 posed between said gearing and said second men tionof adjustment said latch member permits movement of> said worm gear in ,one direction only from a neutral> position, and >when moved to a third position of adjustment said latch 70 member engages saidV collar Yto lock said worm gear in neutral position, resilient means for actu ating said worm gear inV one- direction, and means operating on said worm Wheel for actuat ing said worm gear axially in the reverse direc 75 r6 2,133,822 . tion against the faction -of said iresilient means >when va `predetermined .load is imposed .upon .said cable. ` 7. In a device foir fthe class described, the com. bination of a winch, including :a ,cable winding drum, means vfor actuating :said :drum to :wind _in or pay out cable, a .second .actuating means Yadapted to :operate :said drum independently of said first mentioned .actuatingimeana and .auto ving va worm gear operatively connected to said differential gearing and adapted for axial move ment in either direction from a neutral position, ~Iiuid .pressure means operatively connected to . :said second mentioned power means, a valve con trolling the operation of said iluid pressure means, and means voperatively connecting said matically operable :fluid pressuremeans for con valve to said worin gear. trolling the operation of said second :actuating 13. In a device of the class described, the com bination of a winch including a cable `winding drum., power means for actuating said ¿drum to means. ~ '8. Ina :device roi î.the .class described, ,the .com bination of a winch including a cable -winding 15 drum, `means for actuating ¿said .drum to wind in or pay out cable, idifEerentia-l .gearing `between 'said „drum 'and actuating means, a :second actu ating means «operative'ly :connected to said dif ferential gearing and adapted‘to ¿operate .said '20 drum Yindependently @of :said <ñrst mentioned Kactu ating means, 'and automatically ¿operable fluid pressure means *for .controlling the :operation .of .said second 'actuating means. 9. In a 'device of the .class -rìescribe.d, the 'com Vbination of :a winch, including >a ¿cable winding drum, means tfor actuating said drfum to wind in or pay out cable, zdiiîeren'tial @gearing :disposed between said tdrum and :actuating means, an hy draulic transmission :operatively ¿connected Ato .30 said differential »gearing fand adapted to actuate said drum independently of fsaid actuating means, and automatic means v.for ¿controlling fthe operation of -sai‘d hydraulic transmission. 10. Ina device »of the v.class described, the com rbination of a twinch, :including a cable Ywinding drum, means yfor actuating .said fdrum :tof-Wind in or pay out cable, `differential Igearing .disposed vbetween vsaid V»drum and actuating means, 'an `hy'draulic transmission operatively lconnected to said differential gearing and adapted to 4actuate said drum :independently of rsai'd actuating means, and automatically operable nuid ,pressure lmeans 'for controlling Ithe operation ¿of :said hy draulic transmission. 45 ‘tion of the flatter, said automatic means includ > ’ ‘ 11. Ina device ofthe class rdescribed, the com .bination of ia winch including :a cable winding drum, means_ior actuating said drum to wind in or pay vout cable, differential ggea-ring v'disposed Abetween .said Winding :drum :and actuating 50 means, ian hydraulic transmission operatively connected to said :differential gearing :andzadapt ed to `operate vsaid drum .independently >of said actuating means, automatic means :disposed 'be tween said gearing and »said xvhydraulic :transmis .55 sion for controlling 'the operation :ofv‘the latter, said automatic means including aan .axially mov able member, fa ‘valve -,operatively fconnected to said member, ?Huid ipressure lmeans operatively connected Ato rsaid transmission 4¿for `_conditioning 60 the same ~for operation 1upon vadjustment of v»said valve, ‘and additional 'iluid pressure means «con ‘trolled by said valve ,for actuating said trans mission 'to neutral when fsaid axially movable member .assumes >a neutral fposition. 85 l2. vIn a _device of the class described, the vcom bination of a winch .including .a :cable winding drum, power means for .actuating :said drum .to windfin orzpayfout cablefdiiîerentia'l gearing dis posed between said winding 'drum and power means, a second'power means operatively con nected to :said diiîeren'tial gearing and adapted tooperate-said winch >‘independently-of said first mentioned power means, vautomatic means dis posed between said :gearingrand said second :men 7.5 tioned power means v¿or controlling ‘.the .opera ’ <Wind in or pay out cable, differential gearing dis .posed between said winding drum .and power means, a second power means operatively con :nected to `said differential -gearing and adapted to operate said winch independently of said `iirst mentioned power means, automatic means dis posed vbetween said gearing and said 'second men tioned power means for controlling the opera tion ofthe latter, said automatic means includ yingaworm. gear'operatively connected to said dif ferential gea-ring and adapted for axial move' `ment i-n either direction from a neutral position, fluid pressure means operatively connected toä said second mentioned power means, a valve con trolling the operation of said fluid pressure means, means operatively connecting said valve :to .said worrnggear, and means for controlling the 4axial movement of said worm gear. »14. In adevice of ther-class described, the com bination of a winchV including a cable winding » rum, power ‘means for actuating said drumV to ywind 'in ~or pay out cable, differential gearing -disposed >beneath said winding drum and power 35 means, a -second power means ‘operatively Acon -nected to »said-differential gearing and adapted to operate «said winch independently of said ñrst mentioned power means, automatic Vmeans dis «posed -between said gearin-g'and said second men .tioned power means for controlling the opera tion of the latter, said automatic `means .includ ing -a worm gear 4operatively connected :to vsaid diiiîerential gearing and adapted forfaxial move ment -in either :direction from a neutral position, `iiuid Vpressure -means operatively connected to d5 said second mentioned power-means, a valve con trolling the operation of said iiuid pressure means, means operatively connecting-said valve .to -said worm gear, and adjustable means -çfor controlling the axial Vmovement of said -worm 60 gear, Vsaid last mentioned-means when moved to one position lpermits -axial movement of said .worm Vgear in’either direction from a neutral po sition, when moved to a second position of ad justment said vmeans permits movement of said worm gear in one direction only from said neu tral position, and -when moved to a Vthird posi tion of vadjustment said meanslocks said worm gear Iin -neutral position. 80 15. «In a device of the class described, the com. bination -of a winch including a cable winding drum, means for actuating said drum to wind in or pay out cable, ¿differential `gearing >disposed between said winding drum and actuating means, an `hydraulic transmission operatively connected vto saidV diiïerential gearing and adapted to .op erate said drum independently of said actuat ing means, :automatic Ameans disposed .between said gearing'and ‘said hydraulic transmission -for controlling the operation of the latter, said au tomatic means including an axially movable member, a control valve operatively connected to said member, iluid vpressure means .operatively connected `to .said transmission for `conditioning 65 7 2,133,822 the same for operation upon adjustment of said valve, additional fluid pressure means controlled by said valve for actuating said transmission to neutral, when said axially movable member as sumes a neutral position, and a pump operatively 19. Ina device of the class described,'the com bination with a winch including a cable winding drum, of power means for actuating said drum to .wind in or pay out cable, vgearing disposed be tween said winding drum and said power means, connected to said control valve. 16. In a device of the class described, the com bination of a winch including a cable Winding drum, power means for `actuating said drum to wind in or pay out cable, differential gearing an hydraulic transmission for operating said winding drum independently of said power means, a member adapted for axial movement disposed between said winding drum and power means, a second power means operatively con nected to said diiïerential gearing and adapted to operate said winch independently of said ñrst operatively connecting said hydraulic transmis sion to said gearing, stroke adjusting means con 10 necting the pump end of said transmission with said member, resilient means for shifting said member-in one direction to cause operation of said hydraulic transmission in one direction, and mentioned power means, automatic means dis posed between said gearing and said second men tioned power means for controlling the operation said gearing engaging said member and being adapted to shift the latter in the reverse direc tion to effect a reverse operation of said hydraulic of the latter, said automatic means including a worm gear operatively connected to said diiiïer ential gearing and adapted for axial movement in either direction from a neutral position, fluid pressure means operatively connected to said sec ond mentioned power means, a valve controlling the operation of said ñuid pressure means, means transmission. 20. In a device of the class described, the com bination with a winch including a cable winding 20 drum, of power means for actuating said drum to wind in or pay out cable, gearing disposed be tween said winding drum and said power means, operatively connecting said valve to said worm gear, and a pump operatively connected to said valve. 17. In a device of the class described, the corn bination of a winch including a cable winding drum., power means for actuating said drum to wind in or pay out cable, diñerential gearing disposed between said winding drum and power means, a second power means operatively con nected to said differential gearing and adapted to operate said winch independently of said first mentioned power means, automatic means dis posed between said »gearing and said second men tioned power means for controlling the operation of the latter, said automatic means including a 40 worm gear operatively connected to said differ ential gearing and adapted for axial movement in either direction from a neutral position, iiuid pressure means operatively connected to said second mentioned power means, a valve control ling the operation of said fluid pressure means, 45 means operatively connectin-g said valve to said worm gear, a pump operatively connected to said valve, and a relief valve in the circuit between said valve and pump. 18. In a device of the class described, the com 50 bination of a winch including a cable winding drum, means for actuating said drum to wind in or pay out cable, diiîerential gearing disposed between said winding drum and actuating means, an hydraulic transmission operatively connected 55 to said differential gearing and adapted to op erate said drum independently of said actuating means, automatic means disposed between said gearing and said hydraulic transmission for con 60 trolling the- operation of the latter, said auto matic means including an axially movable mem ber, a control valve operatively connected to said member, fluid pressure means operatively con nected to said transmission for conditioning the 65 same for operation upon adjustment of said valve, additional fluid pressure means controlled by said valve for actuating said transmission to neutral, when said axially movable member as sumes a neutral position, a pump operatively 70 connected to said control valve, a relief valve in the circuit between said pump and control valve for bypassing fluid when the pressure there in exceeds a predetermined value, and an addi tional relief valve operatively connected to said 75 control valve. an hydraulic transmission for operating said winding drum independently of said power 25 means, a member adapted for axial movement operatively connecting said hydraulic >transmis sion to said gearing, stroke adjusting means con necting the pump end of saidftransmission with said member, resilient means for shifting said 30 member in one direction to cause operation of said hydraulic transmission in one direction, said gearing engaging said member and being adapt ed to shift the latter in the reverse direction to eiîect a reverse operation of said hydraulic trans mission, and means controlling the operation of said member. , 35, ' 21. In a device of the Aclass described, the com bination with a winch including a cable winding drum, of power means for actuating said drum 40 to wind in or pay out cable, gearing disposed between said winding drum and said power means, an hydraulic transmission for operating said winding drum independently of said power means, a driving member adapted for rotary and axial movement operatively connecting said hy draulic transmission to said gearing, stroke ad justing means operatively connecting the pump end of said hydraulic transmission to said mem ber, resilient means for shifting said member in 50 o-ne vdirection to eiïect operation of said trans mission in one direction, said gearing engaging said member and being adapted to shift the lat ter in the reverse direction to effect a reverse operation of said transmission, and means for 55 controlling the axial movement of said member. 22. In a device of the class described, the com bination with a winch including a cable wind ing drum, of a'n hydraulic transmission for actu ating said drum to wind in or pay out cable, 60 gearing disposed between said winding drum and hydraulic transmission, means for controlling the operation of said transmission, a second hy draluic transmission for operating said winding drum, a member adapted for‘rotary and »axial 65 movements operatively connecting said second transmission to said gearing; stroke adjusting' means for the pump end of said second hy-- draulic transmission operatively connected to said member, resilient means for actuating said 70 member in one direction to effect operation of 1 said second transmission in one direction, means operated by said »gearing for actuating said mem ber in the reverse direction to effect a reverse operation of said second hydraulic transmission, 8 ’ 2,133,822 and. means for controlling the axial movement of said member. 23. In a deviceof the class described, the com bination with a Winch including a cable winding drum, of actuating means for said drum, gear ing operatively connecting said drum and actu ating means, additional means operatively con nected to said gearing and adapted to operate ating means, adjustable means for controlling the speed and direction of operation of said ad ditional means, a shiftable member operatively connected to- said gearing, and means connect ing said shiftable member to said adjustable means, whereby any movement of said shiftable member is imparted to said adjustable means. said Winding drum independently of said actu ROBERT C. LAMOND.