US2297912A

US2297912A - Hoisting apparatus

Info

Publication number: US2297912A
Application number: US251899A
Authority: US
Inventors: Payson Rudolph
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-01-20
Filing date: 1939-01-20
Publication date: 1942-10-06
Anticipated expiration: 1959-10-06

Description

.y Oct. 6, 1942. R. PAYsN HOISTING APPARATUS Filed Jan. 20, 1959 5 Sheets-Sheet l Oct. 6, 1942. R. PAYsoN HOISTING APPARATUS Filed Jan. 20, 1939 3 Sheets-'Sheet 2 Oct. 6, 1942. R. PAYsoN HOISTING APPARATUS Filed Jan. 20, 1939 5 Sheets-Sheet 3 INVENTOR Patented Oct. 6, 1942 U N1 TED STATES Para Nr or fFf-ICE HOISTING APPARATUS Rudolph Payson, Flushing,y N. Y. Application January zo, 1939, serial No. 251;899

11 Claims.

I'his invention relates to =hoisting Vapparatus Aand while it is not limited '.to `a Vspeciiic"use,'1 have shown the samef'embodie'dfinthe form of a hand and power winch iofthe'typeinstalledin hoistways of buildings.andrmountediupon a telescopic mast ofthe characterf covered'by' my Patent No. 2,018,568, vOctober .22, 1935,?solthat the hoist may be `raised Timm/:a1 storage :position in an y-areaway to 'a working :position f'above the areaway and then returned again'toithesstorage position.

This type :of :hoisting fapparatus is commonly used for raising ashes'inxcansf-from the'fbasement of -a building :by fa cahle tortlie sidewalk level and Lfor -lowerng :the empty ztcans for :other :objects. :As "describedin Athe :.above1patent,:fan 'toperator, f wishing to remove-efV ashes from 'an 'ar-.eaway,- stands-zat .:the :bottom of the area-way and operates the dri-vingmechanism:A off'the-telescopic mast `which y'elevate's 'the ivi/.inch thereon, opens the'areaway1 doors?and-#positionsr the-winch at'an loperating levelrabove .ith-e careaway. "'.Thefwinch Aisihen mnerated'to lowerxitscable. ,The present invention provides :a ccontrol Imechanism for f the lowering -nof :the :cable `speed "and `safety.

The movement of fthe #cable i usually presents -a hazard to the 'operatora'lrandlirrgthecontainer fatfthe bottornof thefareaway.

-It'is anf-object :of `this ,invention tto provide rmeans normally-to maintain the f winch i mecha- .nism in asafetydjustment.

AIt is-a -further obj ectfof thisinvention to 'pro- --vide means to norm-ally :maintainthei hoist mechanis-m fin operative lengagement; :and locked against- `descending operation;

It' 'is .arfurther object; of lthis'inventionr'to proaride-means to controllabl-yvrelease:.safetylocking lmecham'sm A for safely lowering-.the hoistingf'cable ,and ffor ysafelyhoisting afload.

It f is f"another object -of f this invention *to `provide a novell'combinatien 'of .ffrictionv 1 clutch "and .brake adapted -to VVa f-hoi'st wwith `:safety `Vcontrol mechanism.

`It is another-1 object of i this invention `to 'pro- .videacrank controlled brake--andfclutchiadapted 'to a-safetyfhoist.

It is a fprimey object Vof this iinvention'to providefinfaminch-ta-gear ratio accommodating hand operation-'andfalsertherewith-a ffpo'wer connection `to the winchfsoithat eitherfhand-or fpower operation may ,be :utilized interchangeably.

It is-a 4further object-"of this :invention to provide in `a winch :a gea-r #rat-lo #accommodating .hand loperation'and alsotherewith a power connection to the hand operated :crank shaft 4of approximately the'same torque' as is provided'by hand whereby1to utilize 'the Iminimum size of power source.

Other objects ofthis inventionwill lbe apparent from Lthe descriptioni and drawings.

'Figure l is a side elevationof the winch mounted on the upper end of ai telescopic mast.

Figure 2 is a plan vi-ewof the winchfshown in Figure 1.

Figure 3 is a sectional elevation =view Vtaken alongtheV linev 3 3 Vof Fig. 2.

vFigure 4 isa `partial sectional 'elevationfview takenl along the line 4 4 of'iFigure 3.

Figure 5 is apartial sectional elevation view .taken along the line `5 5 of Figure l3.

Figure 6 isa partialsectional elevation view taken along the line y6 6fof Figure 3.

Figure 7 is a partial Vplan view Aof :a 4modification of `the invention.

Figure is apartial sectional elevation view along theline 8 8 of Figure 7.

lFigure 9 is apartial elevation view fromthe 'L-l'eft side of Figure '7.

Figure 10 is a partial elevation view from the lower side of Figure 7.

Figure 11 is a view Vof asectional `elevation of azpreferred form ofthe invention.

Figure 12 is a View of afpartial sectional elelvation alonglinel2 l2 of Figure 11.

Figure 13'is'a plan Lviewfand Figure 14 is a .view in side'elevation of an embodiment ofthe invention showing the application of a power Vdrive to the preferred form of hand winch.

Figure 15 is a partial plan view of Figure 14 showing the controller operating connections to the hand crank.

Figure 16 is a partial sectional view in sectional elevation of the apparatus shown in Figure 15 viewed from the handle side vof the mechanism.

The U-shaped horizontally positioned frame i has a depending stub-shaft-l 2 revolvably fitting into the top of a telescopic `mast '3 so 'that'the frame may be pivoted about the stub shaft on the mast. The ends of the U-arms of the frame are provided rwith-bearings 4 and' which support a shaft 6. 'Ihe horizontal shaft 6 revolvably supports a Winding drum `'l betweenthe bearings 4 and `5 and a pair of

links

8 and 9 outside of the bearings, pins l0 Vand Il land washers l2 and I3 respectively holding'the links in position. The links have eyes at-their free ends adapted to support auxiliary equipment in the operating and stored positions of the apparatus, the auxiliary `equipment not being shown. The drum 1 Vcarries a ycable I4 `from which depends a weight I5 and a hook I6, the weight and hook unwinding the cable by gravity under certain operating conditions later to be described. To the winding drum 1 is operatively connected a gear I1 in mesh with a pinion I8 freely mounted on a horizontal shaft I9 carried in

bearings

29 and 2| on the U-frame between the drum 1 and the stub mast 2. The pinion I8 has a bell extension 22 which interiorly has a radially resisting pressure surface 23 and exteriorly a radially resisting pressure surface 24. The interior surface 23 of the bell oo-acts with a fiber member 25 mounted on a cone 26 within the bell. On the cone 26

bolts

21 and 28

support brake shoes

29 and 39 with fiber linings 3| and 32 respectivelyheld in place by

shoulders

33 and 34 respectively. On the

bolts

21 and 28 are compression springs 35 and 36 respectively which yieldingly support the respective brake shoes.

The cone 26 slides on the pinion shaft I9 and is operated thereon by compression spring 31 which is sufficiently powerful to engage the cone 26 and the

brake shoes

29 and 39 with the bell 22 to their full operating capacity. The

brake shoes

29 and 39 adjacent their supporting

bolts

21 and 28 have spaces extending to cone 26 deep enough to accommodate withdrawal of the cone 26 from engagement with the bell 22 while the springs 35 and 36 maintain the

brake shoes

29 and 39 in full engagement with the bell 22. Further Withdrawal of the cone 26 by direct contact with the

brake shoes

29 and 39 progressively withdraws them from the bell 22 whereby the braking effect of the shoes is lessened. The spring 31 transmits its thrust to the pinion shaft I9 by direct thrust on a collar 38 and

pins

39 and 49 and by indirect thrust through the cone 26, and bell 22, the pinion I8 and the collar 4`I with pin 42 in the shaft I9, the collar 4I and pin 42 being between the pinion I8 and the bearing 2|. It is thus obvious that the cone 26 wedged in the bell 22 is self-retaining because of the wedge action between the

nested elements

26 and 22 and subject to remote control by the driving crank for the supporting shaft I9.

The cone 26 is moved against the compression spring 31 by cross bar 43 extending transversely through an opening 44 in the shaft I9. The pin 43 acts also as a key and is supplemented by key 43". Through an axial passageway in the shaft I9 terminating with the opening 44 before mentioned, a bar 45 extends to the pin 43 into which it is threaded. Outside of the frame I and adjacent the bearing 29 a cylindrically recessed collar 46 with a back piece 41 fits over the shaft I9 and is fastened by

dowels

48 and 49 to the frame I. Into the recessed collar 46 fits an inner collar 59- from which an. enlarged collar 59 projects with horizontal ratchet like jaws 5I. The inner collar 59 is held by a key 52 to shaft I9 for rotation therewith. The inner collar 59 is recessed horizontally to provide cages for

rollers

53 and 54 with roll supporting surfaces 55 and 56 respectively. The roll supporting surfaces 55 and 66 provide runways on which the

rollers

53 and 54 travel. The inner collar 59 is furtherrecessed circumferentially to provide pockets for

springs

51 and 58 which respectively operate on rolls 53 l collar 6| held by dowels 62 and 63 on hub 64 of crank arm 65, the hub 64 being mounted for rotation on an overhung portion of the shaft I9. The collar 6I is recessed into the hub 64 of the crank. The hub 64 is held slidably on shaft I9 by a slip ring 66 through which extends rod 45 having locked nuts 61 on the outer end thereof.

The ratchet like jaws 5I and 69 have squared faces 5|' and 69 which act squarely against each other to transmit the force from the crank to the shaft I9. They also have inclined surfaces 5| and 69" which slide against each other as shown in Figure 2 to transmit the force from the crank to the cone 26 when the crank is moved in a direction reverse to that required for hoisting. The'sectional view in Figure 6 shows the jaws 5I and 6 9 in engagement.

Referring to Figures '7 to l0 inclusive, a modification of the invention is shown wherein the crank arm 65 is provided with handle 19 with connecting member II and with positive connection to the pinion shaft |9. Adjacent the handle 19 a lug 12 supports a rod 13 terminating adjacent the handle in a cross member 14 adapted to actuation by the thumb or linger of the hand engaging the handle 'I9. The rod 'I3 carries a collar 15 held by pin 16. Between the collar 15 l and the lug 12 a spring 11 presses the rod 13 into the hub 64 and therethrough into a recess 18 in the shaft I9.

A number of recesses 18 circumferentially of the shaft I9 permit various driving positioningsv of the crank hub on the shaft. It will be noted that the key 52 is omitted from this embodiment of the invention and a substitute 52 therefor is provided on an overhung Vportion of shaft I9 adjacent bearing 2|, also that a central longitudinal passage in shaft I9 is provided for a rod 19 on one end of which slip ring 66 and lock nuts 61' function to maintain the hub 64 on the shaft I9. On the opposite end of the rod 19 locknuts 89 bear against a rocking washer 8| seated in a pivoted arm 82 pressing the latter against a spring 83 bearing against slip rings 84 abutting on the end of the shaft portion I9. The arm 82 is pivoted by bolt 85 through lug 86 extending laterally from the frame I. The free end of the arm 82 carries a pair of wedge shaped projections 81 which have parallel faces fitting over a lug 88 extending laterally from the frame I. Through the lug 88 passes a bolt 89 which Y carries a spring 99 and washer 9| between which brake rim

extensions

92 and 93 of

brake rims

94 and 95 respectively are pressed against the beveled faces of wedge shaped projections 81. The brake rims 94 and 95 are hinged on pin 96 in frame

I. Brake linings

91 and 98 respectively of

rims

94 and 95 contact a brake ring 99 mounted on shaft extension I9. The brake ring 99 is recessed to provide a thin back section |09 and to receive a disc |9I with a thin back section |92. The disc |9I is recessed horizontally on its circumference to retain rolls |93 and |94 on roll supporting surfaces |95 and |96 respectively. The roll supporting surfaces |95 and |96 provide runways on which the rolls travel. The disc I9I is further recessed circumferentially to provide pockets for springs I 91 and |98 which respectively operate on rolls |93 and |94 to force them alongr the respective supporting surfaces |95 and |96 to contact the inner ringlike surface |99 of the cylindrically recessed disc IDI. The disc |9I is held in fixed relationship to shaft I9' by key 52. Also the pinion I8 is held in fixed relationship to shaft I9 by key 52".

Referring; to the preferred-embodiment of the iinventionfillustrated Vin-Figures 1l-.and 12, the

pinionygear` I8 -is shown rotatably supported on a sleeve I I on a reduced section I9" of shaft I9. The sleeve bears aga-inst a collar II-Il adjacent a shoulderl||2 vof the shaft I9. Pin'42 in collar 4I `passes through thesleeve II-Il andmaintains it in position. vIt is thus seen that the pinion gear |-8-is restrainedl against longitudinal movement on the shaft I9-I9. The pinion I8 is provided `with a bell extension 22 which interiorly has a radially resisting pressure surface 23. lThe interior surface 23 is of a longitudinallength .adapted to coact With a-cone 26' and with-a separate brake 4band 3| lfcarried en a brake ring I I2.

The brake ring I I2 is slidably mounteidon` hub 26 of cone- 26 fand a key II3 preventsvrelative rotary movement between the ring Vand hub.

ABolts I|4vlimit the sliding movementof the Yring ,II2 away from the cone 26.

the bell 22. Longitudinal movement of the cone 25 is controlled by the pin 43 extending transverselyinan opening 44 in shaft I9, the shaft I9 havingan axial passage through which a rod extends from pini'43 to nuts 61". The nuts 61 bear against the hub 64 of crank 65 which I operates on-the shaft I9 as previously described in connection with Figures 1 to 46 inclusive. Spring 31 is of a strengthvsufcient tonorrnally retain the cone 26 and the brake band 3| fully in engagement with surface 23 of the-bell 22 by bearingfon the hub 26" at one springend andon the collar y38 pinned'to shaft I9 at the other spring end. The transverse-opening Min the shaft, I9,is.of a length suitable toaccommodate the travel of cross bar 43' necessary for the proper vpositioning of cone 26' and brake ring I I2.

`Referring to Figures 13-'and 14, a hand winch frame I supports a motor |23 with reducing gear |24. The reducingl gear IZA `ca-rries a coupling plate |22 facing independent couplingplate I2! f fastened by means not shown to crank shaft I9' extending from the frame I. A radial key |25 between coupling plates I2I and I22 is utilized to transmit therpower of the reducing gear to the shaft I9 `and I9. The hand winch'is fully illustrated and described in connection with Figure 11. The frame I supports a controller |25 having a connection to a source of electricity `andto the motor, neither of which connections is shown. arm |21 `positioned to be operatively vconnected to the` crank arm 65. From the crank `arm '65 Ia pivoted link |28 with pin |29 extendsto snap .yoke I3!! on the end `of Ythefcontroller operating arm |21. The snap yoke I3!) facilitates'the readvi worm on the motor shaft and a worm gear `confi nected to the shaft I9'with coupling plates |2I and |22. As lthus constituted,y the reducing gear acts as a self-locking device on the coupling plate .I22 and on the following train of mechanism 1 when the radial key |25 is in position. 'Magnetici braking apparatus |24' constitutes a part of the motor-reducing gear combination.

Referring to Figures 15 and 1'6, I provide inner collar 5!) fastened by. key 52 to shaft I9 but inde- The controller |26 has an-operating f i .pendent of enlarged :collar lEnlarged collar 75 -50 .isrprovided ,with horizontalratchetv like jaws 5I and with a radialfscrew yfasti-ming :52' to shaft I9. Radial fastening screw 52' is4 accessible readily 'from the exterior of theY mechanism so that the :operator imay :withdraw `it whenever' it is desirable to 'do so. Such withdrawal 4is desirable whenpower operationconly 'isfcontemplated When power operationiis utilizedywithdrawalof vradial screwf52' freleases the engagingwjaws 5I and m6I) and handle -65 fromconnection to the shaft YI-Sl-so ythat Ywhen vthe pivoted link |28 and snapyokeI30 engaging the rcontrollerfarm |21 :are :put in4 motion bythe' handle: 65 the controller 4|26 forthemotor'is readily manipulatedfto vbe in accord with operating requirements. When .theradial screw 52 -is withdrawnVv from-:shaft I 9, key 52A still functions tol hold innerfcollar-S' yto its yoriginal functioncpreviouslydescribed. "When hand `operation ofthe hoist iszutilized'the radial screw`52'-is yadjusted vinwardly-to engageI shaft I9 softhati-nnerr'collar 50 nand-enlarged collar y5|I";act -as a unitv as set forth4 in the jdescription in connection with Figure `1l. Theprovisionl of radial screw Y52"-and the separation of :collar 50 from Y collar 50 V:gives 'the necessary l' freedom of movement for-.handle 65 to 4function `as afcontrol medium-forthe-motor. A luglII' -on the stationary-collar 46 -is so positioned'thatradialscrew 52 only when withdrawn from shaft I9 will contact'the lug to-hold collar 50 and ijaws`-5|"" 4against further-movement in directioncof the lug. 'It is intended that themotor will .be stopped by the controllerby the time thescrewy 52 hasmade Contact with theV lug 46', and that 'furthermovementor the handle whilemaintaining Vscrew 52 incontact with lug 4:8' -Willpbeutilized-to control `the :clutch to effect-gravity lowering tprevviously mentioned. A--catch Vonthe lug-ll'fnot shown, or a secondlugl maybeutilizedto holdAt-he-'radial screw :52' so vthat the clutch may be again engaged after the manner previously describedin connection with Figure 11. By releasing the. handle 65 the clutch spring `fl-will be Aallowed to force` the jaw .Sil forwardalong jaw `5 I tothe limit .of its travel and thus engagey the clutch.

.Operation `The operation of the embodiment of the inventionshown in Figures 3 to-6 inclusive will'now be considered. Assuming that the `cable .I4 is lowered and' thata load is positioned thereon for hoisting,'the Vcrank|55 is then turned in a forward-direction. The jaws B0 of the crank hub 64 contact the interttingjaws 5| of the disc v-5Il which through key 52 transmits'motion to the shaft I9. The shaft I9 through key 43" transmits motionito the clutch cone 26. Clutch cone 26 is `continuously under pressureof spring 3l and inthe absence of restraining force the clutch is in constant engagement via band 25 with clutch bell-22 on pinion lgear I 8 so that motion of the crank -65 is carried through pinion I S to the hoisting gearII, drum T and cable I4. Upon completion of the hoisting operation, force to Aturn the crankis relieved and immediately the tendency to reverse operation due to the suspended load is checked by the

rollers

53 and 54 in disc l5I] ybecoming operative through the slightest reverse movement of disc 50 upon the inclined supporting surfaces 55 and 56 on the one side andupon the ringlikesurface V59 on the other side. VThe rolls `wedge between the respective suryfaces and 'provide an Yefficient silent holding nmeans `against reverse operation 'of thechain of elements described. Now-assuming that a load is to be lowered from the last mentioned position of the members. Force is applied to the crank to move it in the reverse direction. The temporarily stationary inclined faces 5|" of disc 50 in contact with inclined faces 60" on the hub 64 become operative to force the hub 64 in its backward travel to move longitudinally of shaft I9 and to effect through slip ring 66, nuts 61, rod 45, and cross pin 43 a retraction of cone 26 against spring 31 and from bell 22 in a selective manner. The greater the backward travel the greater the retraction. Upon complete release of the cone 26 from the bell 22 the cone 26 contacts the brake shoes 29 and 36 thereby placing the control of the brake shoes with crank 65, and further retraction of the cone 26 selectively withdraws the brake shoes olf the outside of the bell 22. The degree of withdrawal of the brake shoes is regulated in accordance with the operators observation of the speed of the descending load. Upon completion of the lowering operation the backward force on the crank 65 is relieved by removal of backward pressure by the operator on the crank 65, the spring 31 extends itself thereby moving the cone 26 towards the bell 22 thereby increasing the

brake shoes

29 and 30 contact exteriorly of the bell to a degree that allows the cone 26 to engage the interior of the bell. The expansive force of the spring 31 is also eX- erted through key 43, rod 45, nuts 61 and slip ring 66 upon hub 64 and upon the inclined faces 5|" and 60". These faces 5|" and 60" are of a degree of inclination and relative smoothness to promote the ready return of the hub under the force of spring 31 to a holding position with ratchet jaw faces 5I and 60 in contact.

Referring to the operation of the embodiment of the invention shown in Figures '1 to 10 inclusive, again assume that the cable I4 is lowered and that a load is positioned thereon for hoisting, also that the rod 13 is seated in one of the recesses 18 on the shaft I9. Forward motion of the crank through pin 13, shaft I9, key 52", pinion I8 and gear I1 is transmitted to a hoisting movement of the cable I4. If the operators hand is removed from handle 10 the backward tendency to movement due to the suspended load is met by restraint through key 52', disc |0I, the inclined faces |05 and |06 supportinglock rollers |03 and |04 against surface |09 of brake ring 99, and

brake bands

94 and 95 supported on pin 96 in frame I. 'I'he brake rims or

bands

94 and 95 are normally held on brake ring 99 by force of spring 90.

Now assuming that a load is to be lowered from the last mentioned position, the operator grasps the handle 10, moves rod 13 radially until it is free from recess 18 and then moves the crank 65 in a backward direction. Contact of faces 5I" of disc 53 with inclined faces 60" on hub 64 become operative in its backward travel to force the hub 64 to move longitudinally of shaft I9 in consequence of

rollers

53 and 54 locking disc 50 and jaws 5| from backward movement as before described. Longitudinal movement of hub 64 through slipring 66, locknuts 61', rod 19, locknuts of the crank 65. Spring 83 is continuously active against pivoted arm 82 and its force through rod 19 and associated attaching elements extends to hub 64 sufciently to force the hub 64 to a forward movement position while arm 82 removes the wedge members 81 from

brake rim extensions

92 and 93 suciently to let the brake rims 94 and 95 operate to hold brake ring 99.

Referring to the operation of the embodiment of the invention shown in Figures 11 and 12, again assume that the cable I4 is lowered and that a load is positioned thereon for hoisting, also that the crank 65 is then turned in a forward direction. The jaws of the crank hub 64 contact the intertting jaws 5I of the disc 50 which through key 52 transmits motion to the shaft I9. The shaft |9 through key 43 transmits motion to the clutch cone 26'. Clutch cone 26 is continuously under pressure of spring 31' and in the absence of restraining force the clutch is in constant engagement via metal tometal contact with clutch bell 22 on pinion gear I8 so that motion of the crank is carried through pinion I8' to the hoisting gear I1, drum 1 and cable I4. Upon completion of the hoisting operation, force to turn the crank is removed and immediately the tendency to reverse operation is checked by the

rollers

53 and 54 as previously described. Now assuming that a load is to be lowered from the last mentioned position of the members. Force is applied to the crank to move it in the reverse direction. The temporarily stationary inclined faces 5I of disc 50 in contact with inclined faces 69" on the hub 64 become operative to force the hub 64 in its backward travel to move longitudinally of shaft I9 and to effect through slipring 66, nuts 61", rod 45' and cross pin 43 a retraction of cone 26 against spring 31 and from bell 2'2 in a selective manner. The greater the backward travel of the crank 65 the greater the retraction of the cone 26. Upon complete release of the cone 26 from the bell 22 the cone 26 contacts the brake ring |I2 thereby placing control of the brake ring with the crank 65, and further retraction of the cone 26' selectively withdraws the brake ring H2 and its lining 3| from the inside of the bell 22'. The degree of withdrawal of the brake ring is regulated in accordance with the operators observation of the speed of the descending load. Upon completion of the lowering operation the backward force on the crank is removed by removal of backward pressure by the operator, whereupon the spring 31' extends itself thereby moving the cone 26' towards the bell 22" thereby increasing the contact of brake lining 3|' with bell 22' and the travel of the ring |I2 within the bell until the cone 26' fully engages the bell 22. The expansive force of the spring 31 is 39, accommodation washer 8|, pivoted arm 82, T and wedges 81 acts upon brake rim extensions 92 ing is regulated bythe degree of brake rim sepa-1 )ration in turn dependent upon backward travel also exerted as previously described to return the hub 64 to ahoisting position.

The relation of the metal cone 26', the slip ring I|2 and brake band 3| to the pressure surface 23' of bell 22 is a particular one new to the art. The metal surface 23 is tapered and the metal cone 2`6 lits the surface 23', their degree of angularity being such that a slight movement of the cone 26 axially attains prompt complete disengagement or engagement. The brake band 3| is of a compressible friction producing material which expands or contracts radially as the slip ring I I2 is moved axially of the cone or bell. The expansive force of the braking material is utilized during the axial movement of the ring II2 to maintain contact with the surface 23', although at a changing degree of pressure in consequence latter are selected to give, along'wi-th the degree-- of cone and bandang-ularity, quick in a-nd'oi-it actionof thef cone, continued braking effect of varying*l degreeby the braking band 3|', and-fre` liability" of actionof either clutch or brakeintroll'ed by keys-|25 and 52 and by the 'controller |263 With the^snap yoke wl-disengaged and radial key-|25` removed, the vmechanism operates as lsetforth in connection with Figures 11 land 12; key 2-functioning to transmitthe-crank effortto theshaft I9. With the snap yoke- |38 engaged and radial key I 2'5 in place, it is desirable-to ldisengage key 52 so that the crank Gamay-be utilized to control the `motor |23- and Vtheclutcn cone V2 BJ. While Athe-key 52 vis--appa'rentlyinaccessible, the membersto the right thereof as shown in Figure 11areJreadilyfremovable. However, aradial key 52 in the-formv of 4ascrew through memberv 5| into shaft IS; though not fully illustratedis-contemplated to 'give accessibility fromA the `exterior of the apparatus and so almost instantaneous selectivity of mode of operation. TheY key 52-or radial screw-52 being-disengaged, the' selfY lockingreducing gear |24-isutilizedto` hold the.

mechanism.- Backward movement of thecrankpushes the control vlever |21 down to stop the' motor, initiate-'magnetic braking and to lockthe hoisting drum; Further backward movement of the crank 65 gradually disengages cone 26 from bel'122i of thev clutch in consequence of the-crank movement alongVV shaft I9 and allows theI ope-ration ofthefdrum 1 byV gravity. Forward movement of thef'crank will instantlyl be initiatedlby spring V 3l upon manual release' of the -crank 65 until the clutchy is engaged and the mechanism-is locked. Further movement of the crank isutilized to'operate the controller to initiate motor operation'. Obviouslythe controller mayY be op'- erativ'ely connected'with the crank 65 in avariety ofways. Thecontroller |2S- can also be connected to the motor |23 to operate independently of the crank'SEflike'push button control andthe crankv (i5-then can be utilized forlowering.l The positioning of the controllerV so thatA it mayn be operatively connected with the crank extends' the selectivity of modes of operation of -themechanism. With the snap yoke|30disengaged, the controller arm |21 is available forv direct-manual manipulation and such action iscontemplated," the crank arm 65 being held by spring 31 and rotatingwithshaft I9 as propelled bythe motor |23'. Thevarious modes of operation available will be utilized selectively to meet the peculiar situations incident tol individual installations.

The type-of holding mechanism herein' set forth ispractically instantaneous and silent in its operation necessary to hold the pinion shaft I9. It eliminates-the lnoise and clatter'incident to the use of the pawl and ratchet holding device. It also eliminates the silencer usually provided for the pawl and ratchet.

A number of variations of the embodiments of the rinvention disclosed are contemplatedto fall within the scope of the appended claims. For example', referring to Figure 11, the' portion of the pinion shaft I9" within the pinion and its-b`elllmaylbe divided from the shaft I9. 1n this case the pinion supporting portion I9 maybe variously utilized, inone '-instarlcev keyed to and v rotatable L with:` the; piriionf and recessed to support the shaft'y I 9,--in1another-instance the portion |9"` maylf be-4 joined' tdV the frame lasl a stud-fand recessedto support the-*shaft |912-A In Figu-re.. 4,'l surfaces-c5`5 'i and 5I-shown straight may becurved circularly -with la decreasinglcurve slopeopposite1 the! spring fend S to provide a. proper incline.` forfengaginguth'e roller 53 -between surfaces 55' and 59and -5|i-'ar-1i:l.`59E` WhiIe/'theseinstances of l variation arev Y noti` fullyillustrated',lv they are set forth. as valued-` additions.` to; the. yart;V and theirL actionl isil readily apparenti: from. the ref erence given. Telaim:

-12 ln a hoisting winchpliavingi a; frame.. a hoisting-y drum rotatably'mountedion" said frame, a gear operatively? connected to. said i drumpa pinion gearfin-Lengagement iwit'h'said first mentioned gear, .ai mountingm for saidi pinion gear comprising` ai@ coredLdriving shaft ly xed longitudi'nally relative- :to said'A piniorrgear'fand yrotatably supported; on said framea releasable. driving connection'- -Alcnetweeni said. .pinionuv andsaidldriving shaft, .means to .hold..said-lshaftfrom. backward rotationg-aLcrank mounted on arr-overhung? portion? of Said lshaftg.theicombination of, a..re1eas able connection' between saidMbrank and, said overhung` shaft: portion. transmitting i to, the rlatter-and 'said pinionlforwardmotionrof:said crank and :allowing backward' 'motion .of said'ICrank, `and means mountedxin saidiicored'driving shaft Yactuated` by said.v crank initsr backward motion controlling; saidi` rst mentioned i pinion driving connection and:v therewith thel` backward'. movement of saidpiniorr .whereby thelowering motion of saidhoisting drumisiregulated.;`

2.. In al hoisting I winch, the :combination comprising ai frame, ai hoisting drum'` rotatably mounted on said frame, a gearoperatively. connectedtosaiddrum to `rotate therewith, ,a pinion gear ini engagementIwith said ,rst mentioned gear; atmountingsfr said .pinion gear comprising a cored shaft?xedilongitudinallyrelative to said pinion;Y gear andi; rotatably supported on' said trame, means Lto. `hold'fsaidqshaft Vfrom backward rotation, allongitudinally: movable crank mountedfon@ i an l overhung ,portionof -said shaft, ,a connection?- betwe'en" said;V crank and saidA overhung shaftlportionatransmittingnto the latter forward motionof. said crank: and allowing backward movementf ofasaidtcrank; releasabl'e means `normally holding Y.said .pinion driving. connection with` said pin'ion mounting` shaft, and means mountedVv Y in .1 saidl coredr shaft. actuated by: said crank in itsbackward: motion releasing said'releasable means between said pinion gear and its mountingshaft.

3T. YIn fai .hoisting winch, the combination cornprising a frame;m a hoisting drum rotatably mountedI on' `saidf frame,` .a f gear operatively connected to said' drum; vaafreely. rotatable'pinion gearV inl engagement' with: said first mentioned gear, aim'ounting forfsaid pinion'gear comprising acored shaft'xed longitudinally relative to saidpinionllgearland :rotatably: supported on said frame, meansltoholdsaid'shaft from backward rotationr at crank. mounted `onfan overhung portion of saidi` shaft, a'iconnection between said crankl andsaidioverhungLshaft portion transmitting; to. thelatterr forward motion of said crank and allowing backwardfmovement of said crank, releasable.: means normally.; holding said pinion in drivingfconnection with said pinion mounting shaft, and means mounted in said,

cored shaft actuated by said crank in its backward motion releasing said resleasable means between said pinion gear and said shaft.

4. In a hoisting winch, the combination comprising a frame, a hoisting drum rotatably mounted on said frame, a gear operatively connected to said drum, a freely rotatable pinion gear in engagement with said rst mentioned gear, a mounting for said pinion gear comprising a cored shaft fixed longitudinally relative to said pinion gear and rotatably supported on said frame, means to hold said shaft from backward rotation, a crank mounted on an overhung portion of said shaft, a connection between said crank and said overhung shaft portion transmitting to the latter forward motion of said crank and allowing backward movement of said crank, releasable means normally holding said pinion in driving connection with said pinion mounting shaft and means mounted in said cored shaft actuated by said crank in its backward motion progressively releasing said releasable means between said pinion gear and said shaft thereby controlling the free rotation of said pinion gear.

5. In a hoisting winch, the combination comprising a frame, a hoisting drum rotatably mounted on said frame, a gear operatively connected to said drum, a freely rotatable pinion gear in engagement with said gear, a mounting for said pinion gear comprising a cored shaft fixed longitudinally relative to said pinion gear and rotatably supported on said frame, means to hold said shaft from backward rotation, a crank mounted on an overhung shaft portion transmitting to the latter forward motion of said crank, a friction clutch normally holding said pinion in driving connection with said shaft, and means mounted in said cored shaft actuated by said crank in its backward motion releasing said friction clutch.

6. In hoisting apparatus, a frame, a winding drum mounted on said frame, a gear operatively connected to said drum, a pinion gear in driving engagement with said first named gear, a shaft crosswise of said frame xed longitudinally relative to and coaxial with said pinion gear, means for preventing rotation of said shaft in one direction; a drive connection between said pinion gear and said shaft having a member movable axially of said shaft adapted to engage or disengage said connection, a second cross member manually operated to control said axially movable member, a drive connection to said cross shaft and a manual member rotatable about and movable along the axis of said shaft and adapted to actuate said second cross membei'.

7. In hoisting apparatus, a frame, a winding drum mounted on said frame, a gear operatively connected to said drum, a pinion gear in driving engagement with said first named gear, a shaft crosswise of said frame coaxial with and fixed longitudinally relative to said pinion gear, means including a pair of nested friction elements coaxial with said shaft for revolving said pinion gear with said shaft in one direction to rotate said drum, means for preventing the rotation of said shaft oppositely to the Said one direction, and means for disengaging said pinion gear so that it can rotate freely, said disengaging means including a manual driving member for said shaft and a second crosswise member for Separating rsaid nested friction elements from their self retaining wedged relationship.

8. In a hoisting apparatus, a frame mounted on a telescopic mast, a winding drum mounted on said frame, a gear fixed to said drum, a pinion gear in driving engagement with said first named gear, a shaft crosswise of said frame and coaxial with and xed longitudinally relative to said pinion gear, a manual crank mounted for longitudinal movement on said shaft, a self engaging friction clutch including a pair of nested friction elements joining said pinion gear and said coaxial shaft, pressure means adapted to engage said clutch, means for disengaging said clutch and for rotating said clutch comprising a second crosswise member operatively connected to said clutch and to said crank, and means for preventing backward rotation of said coaxial shaft and said pinion effective on said pinion by wedge action between said nested friction elements.

9. In hoisting apparatus a frame, a winding drum mounted on said frame, a gear operatively connected to said drum, a pinion gear in driving engagement with said first named gear, a cross shaft coaxial with said pinion gear, a friction clutch including nested friction elements between said pinion gear and said shaft, means normally maintaining said clutch in engagement, means for revolving said shaft in one direction including a manual driving member, a second cross member adapted for separating said friction elements by connection with said manual member, and means for preventing the rotation of said shaft in the opposite direction, wedge action between said nested friction elements of said clutch being regulated by said second cross member.

l0. In a winch having a frame, a hoisting drum rotatably mounted on said frame, a gear operatively connected to said drum, a pinion gear in engagement with said first named gear, and mounted for rotation on said frame a cored drive shaft supporting said pinion and with a drive connection therebetween, and means to hold said pinion from rotation in one direction; the combination comprising a crank mounted for longitudinal movement on an overhung portion of said drive shaft, a spindle mounted for axial movement in said cored shaft and adapted to control said pinion holding means, pressure means controlling axial movement in one direction of said spindle, an operative connection between said crank and said spindle giving to the latter axial movement opposite to said one direction thereby releasing said pinion for rotation.

11. In a winch having a frame, a hoisting drum rotatably mounted on said frame, a gear operatively connected to said drum, a pinion gear in engagement with said first named gear, and mounted for rotation on said frame a cored drive shaft supporting said pinion and with a drive connection therebetween, and means to hold said pinion from rotation in one direction; the combination comprising a crank mounted for longitudinal movement on an overhung portion of said drive shaft, a spindle mounted for axial movement in said cored shaft, a clutch connection between said shaft and said pinion, a control connection between said spindle and said clutch, and an operative connection between said spindle and said crank whereby the movement of said crank regulates the position of said control'connection and thereby said clutch.

RUDOLPH PAYSON.