US2374450A - Chain hoist - Google Patents
Chain hoist Download PDFInfo
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- US2374450A US2374450A US476793A US47679343A US2374450A US 2374450 A US2374450 A US 2374450A US 476793 A US476793 A US 476793A US 47679343 A US47679343 A US 47679343A US 2374450 A US2374450 A US 2374450A
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- unit
- hoisting
- supporting
- motor
- driving shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/18—Power-operated hoists
- B66D3/20—Power-operated hoists with driving motor, e.g. electric motor, and drum or barrel contained in a common housing
- B66D3/22—Power-operated hoists with driving motor, e.g. electric motor, and drum or barrel contained in a common housing with variable-speed gearings between driving motor and drum or barrel
Definitions
- invention relates to that type of hoisting apparatus embodying a chain or sprocket wheel loosely supporting a chain commonly manually operated, said wheel being connected with the hoisting mechanism for operation thereof, and an object of the invention, 'among others, is the construction of a chain hoist provided with means for operatingthe chain wheel or sprocket by means of. power mechanically applied and with a power unit supported independently of the hoisting unit; a further object of the invention. is: the provision of means whereby resistance offered by the hoisting unit.
- a still further object of the invention is the provision ofi means whereby operation of said switch may inga. load chain I 2.
- the driving unit as illustrated herein comprises a supporting yoke N that, as well as: the supporting hack 8, depends either stationaryor movable from. above, said driving unit employing a, link t5 and eye IS.
- a driving shaftrl 'l is rotatably supported in bearings 8I9 at the outer ends of the arms --Zl of the yoke I4, as
- FIG. 1 isxa view in elevation of my improved larged scale of the mechanism connecting the driving power unit with the hoisting unit. and on a plane denoted by the dotted line 34:- of Fig. 1.
- Figure 4 is a view on enlarged scale in section on a plane denoted by the broken line 4--4 ofiEig'. 2.
- Figured is a, detail viewon enlarged scale showing the electric switch and. the means and inethod for operating it.
- FIG. 6 is. a view in section on a plane denoted by thobroken line E -S of Fig. I. i i
- the hoistingmechanism is of old and well known construction and a detailed showing and description is not required herein for afull understanding of the invention, itbeing suflici'ent to state that such mechanism is contained in a chain hoist housing comprising a. front cover 6 and a back cover I spaced apart to accommodate a supporting book 8 projecting from a supporting" hook swivel 9- through the space between the covers, said mechanism further comprising parts not herein specifically described but including a load.
- sprocket t0 and a load chain stripper II also extending through said space and support case and motor support 22 comprising a power unithousing is. suspended between the arms 20- and: It, said case including a cap fitted: to close the open endrofthe caseand secured in any suitable to'the case adjacent the arm 21.
- a moto'r base 24 is formed as a part. of the case 22. and a motor ZS is'secured to the base.
- the spindle 26 of the motor has a sprocketi'secured at its outer end and a chain nowadays.connects'thesprocket with a sprocket wheel zll mounted" on a stud'shaft 25 extending withinthe ease
- a upinion 30 rigid with the sprocket wheel-2.8 meshes with an intermediate gear 3l having an intermediate pinion32 rigid therewith and in mesh with a; driving gear 33.
- the gear it and pinion M3Z are suitably rotatably' mounted within.
- shaft H is in mesh with thewintermediate pinion 321
- the driving shaft it is rotatably mounted within the ease and has one member 35- of a flexible joint secured thereto, the other member 36' of. said joint being secured to one end of: connecting shaft3l, the oppositeend of said. shaft being connected to the hand wheel l3 by means of a spider comprising aplurality of spider arms 41] which may be. employed in such numbers as may be desired,
- Each of these arms terminatesat. one end in a head 41" including a v frictional shoe 44 formed to fit upon the rim of a conventional hand wheel.
- These arms comprise tubes formi ngspace'rs between the heads 4
- - Bolts 43 extend through the heads 4L spacers, and drive member 42",. these bolts servingto securely clamp the members togethen. This: provides a yielding frictional. conshaft nection between my improved power unit and a conventional chain hoist without requiring any mechanical operations upon the hand wheel.
- the power unit may be constructed as a separate unit for sale to present owners of standard chain hoists or such power unit may be sold complete with a chain hoist of any suitable character connected thereto, in which case the spider may be employed or equivalent means may be used as desired for connecting the extension shaft of the power unit to the hand wheel of a chain hoist, in either case the hoisting unit comprising an actuating member, as a chain operated wheel or other means, operatively connected with the hoisting mechanism for operating it, said lifting or lowering a load.
- the normal position of the plunger 42 may be vertical under the axis of the cam and the points at which this divergence of the cam will terminate may be diametrically horizontally opposite on said cam, and from these'points the periphery-of the cam will be concentric with its axis to a point in vertical alignment with the axis of the'cam.
- Some tolerance maybe permitted for excess loading of .the hoisting uriit which may effect some slight normal revolution of the power unit but not to. an extent to cause such revolution to a point for operating the switch to shut olT the power.
- the cam 43' is formed as above described so that it may accommodate itself to different types of mechanism inv which the motor spindle may the connecting mechanism and I wish therefore to have it'understood that this'connecting shaft may beara universal joint at either or both ends or that such universal joint maybe entirely dispensed with.
- the latter comprises a structure that is in the nature of a counterpoise in Should, however, the load on the hoisting unit be excessive this will be instantly Should excessive movement of a normal load by the hoisting'unit take place until such load comes in contact with the housing of a t-hat .tiFlGyDOWGI' innit when:peratedrwiilccounterr-balance 'vforcessset up Joy: the hoist-irrg unit; in, the action of iraising I respective nor :2 rated 51103.65, this i-coimterpoiseiactiomof: thegpower unit :being presenttduring tany normal operations-of therhoisting unit andaaffiordingrthesafety feature whenirated iloadi-upon ithei hoist) hook is: exceeded iasipre'de- .termined, resulting incabnormalioperationof the .
- a'chain hoistingunit comprising ,hoisting mechanism and means for and the-rmechanismwofi said! hoistingzunit aa supmorting lmrember pivotaily suspended from said -sus'pensionrmember a; motor .ca'rniedwby-ssaid supportingimembenran :openative-connection: between said motonandrsaidrdriving shaft; and an-electric iswitch'rideviceifor said-motor randaarswitch actuaatinga :device: mounted forsrelativermovement, T0116 device onreach-i of -said members, v-Wherebyw moveime-ntrof said-:supportingzmember will-ieifectsopersupporting said unit apower-unitcomprisingia suspension member, a driving shaft rotatably mounted ini-sai d.
- hoisting -unit comprising hoisting mechanismand-tmeans for supporting said unit apoweruunit comprising va suspension member, a driving shait rotatably mounted insaid suspension member an operative connection .between said driving i haft randithe mechanism a.
- the-power unit comprising via supporting member mounted in swinging relation to .saidsuspension;member on the axis .ofrandunderneath,saiddrivingsshaft, a motorimountedionsaid supporting memloeri-atgthe tatablih mounted in operative connectionwbetweemsaid:idriving :shaft ai'iiom-ofv :saids switch a to breakz the: electricvcurrent sup-plywtossaidiinotor.
- a power unit comprising a suspension member with means for supporting it from an overhead support, a driving shaft rotatably mounted insaid suspension member, an operative connection between said driving shaft and the'mechanism of said hoisting unit, a gear switch actuating plunger comprisedin said switch,
- a chain hoisting unit comprising a hand wheel member, a suspension member for said unit, a power unit comprising a suspension device, a driving shaft rotatably mountedin said suspension device substantially in line with the axis of said hand wheel member and operatively connected therewith, a supporting member rotatably mounted in said suspension device on the axis of said drivin shaft, a motor l supported by said supporting member, and an operative connection between said motor and said driving shaft.
- a chain hoisting unit 0 comprising a hand wheel member, a'suspension member therefor, a power unit comprising a suspension device, a driving shaft rotatably mounted in this suspension device substantially in line with the axis of said hand wheel member and operatively connected therewith, a supporting cated below the axis of said hand wheel member,
- a power unit comprising a pivotally mounted supporting member, a driving shaft within said supporting member means for rotatably supporting said drivingshaft, an operative connection between said driving shaft and said power receiving shaft, a prime mover supported by said supporting member in a plane, below said driving shaft and operatively connected.
- a chain hoisting unit comprising hoisting mechanism, means for supporting said unit, a power unit comprising a pivotally mounted supporting member, a driving shaft within said supporting member, an operative connection between said driving shaft and said hoisting mechanism, means for rotatably supporting said driving shaft, a prime mover supported by said supporting member in a plane below said driving shaft and operatively connected therewith and thereby providing weight in its normal position and independent of mechanical means to resist tendency of said'supporting member to rotate about said driving shaft in opposite directions froma normal position, means on said prime mover for readily adding weights whereby the weight necessary to maintain said supporting member within a definite arc of movement in either of opposite directions from its normal position can be added to said prime 'mover to oppose the normal resistance to rotation of said driving shaft, electric switch cut-off means located on said supporting member and switch actuating means interposed in the path of movement of said switch cut-off mechanism on opposite sides of said supporting member to control supply of power to drive saidprime mover upon movement of said supporting member in either
- a chain hoisting unit comprising a hoisting mechanism including a chain wheel shaft, a chain wheel supported by said shaft, means for supporting said hoisting unit, a power unit including a prime mover and a driving shaft operatively connected therewith, an operative connection between said driving shaft and the hoisting mechanism, said connection including spider arms and means for removably attaching said arms to said chain wheel and to a'member of said operative connection, said attaching means comprising ayielding frictional member located between said spider arms andthe chain wheel.
- a chain hoisting unit comprising hoisting mechanism and means for supporting said unit, a counterpoise power and controlling unit operatively connected with said hoisting unitand including a suspension device,
- a driving shaft rotatably supported by said device and operatively connected with said hoisting unit, a supporting member swingingly supported by said driving shaft and depending therefrom, a motor carried by said supporting member, and an operative connection between said motor and said drivinglsh'aft whereby torque created by said motor and the resistance of said hoisting unit will effect a swinging movement of the supporting member on said driving shaft and thereby create a counterpoise function in said power unit.
- a power unit comprising a suspension member, a driving shaft rotatably mounted in said suspension member, an opera tive connection between said driving shaft and mechanism of said hoisting unit, said power unit also including a supporting member pivotally mounted on said driving shaft and thereby sup: ported by said suspension member, a power producing-member attached to saidsupporting mem her, and an operative connection between said power producing member and said driving shaft,
- the weight of said supporting member being disposed to counterbalance forces set upby the chain hoisting unit in raising a load, said power unit thereby acting as a counterpoise weight for said hoisting unit.
- a chain hoisting unit comprising hoisting mechanism and means for supportingsaid, unit, a suspension member, a power unit suspended from and for swinging action underneath said suspension member, said power unit comprising a driving shaft rotatably mounted in said suspension member, a supporting member pivotally suspended from said driving shaft, an operative connecting means between said driving shaft and the mechanism of said hoisting unit, a motor constituting a part of said power unit and ailixed to said supporting member, and an operative connection between said motor and said'driving shaft whereby the torque created insaid driving shaft efiects counterpoise action by said motor relatively to said hoisting unit.
- a power unit comprising a pivotally suspended member, a driving shaft journaled and supported on said member, a depending support solely supported for pivotal movement on and about said shaft, a motor on said support, drive 1 connections between said motor and said shaft,
- switch and operating device for said motor one on the suspension member and the other on the supporting member whereby predetermined movement of said supporting member will effect operation of said switch to break the electric current supplied to said motor upon predetermined resistance of said shaft to said drive motor.
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- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Description
R E. NELLE S CHAIN HOIST Filed Feb. 22, 1945 April 24, 1945.
W aim [r Patented Apr. 24, 1945 JLQUNITED STATES PATENT" OFFICE CHAINHOIST I Russell E. Nclles, Millburn, N. J., sst-gm to The Union Manufacturing Company, ..New Britain, Conn acorporati on of Connecticut Application February 22, 1943, Serial No. 476,793
17 Claims. (01154 168) invention relates to that type of hoisting apparatus embodying a chain or sprocket wheel loosely supporting a chain commonly manually operated, said wheel being connected with the hoisting mechanism for operation thereof, and an object of the invention, 'among others, is the construction of a chain hoist provided with means for operatingthe chain wheel or sprocket by means of. power mechanically applied and with a power unit supported independently of the hoisting unit; a further object of the invention. is: the provision of means whereby resistance offered by the hoisting unit. toop'eration of the power unit will cause the latter to automatically operate an electric switch to control supply of power current to said power unit; and a still further object of the invention is the provision ofi means whereby operation of said switch may inga. load chain I 2. I'usea hand wheel l3 as heretofore employed supported outside of and adjacent one of 1 the covers of said' housing by mechanism extending" through said cover, said wheel being: illustrated herein merely a a convenient. means for connecting my improve-d drivi-ng mechanism with a hoisting unit of existing constructionj The driving unit as illustrated herein comprises a supporting yoke N that, as well as: the supporting hack 8, depends either stationaryor movable from. above, said driving unit employing a, link t5 and eye IS. A driving shaftrl 'l is rotatably supported in bearings 8I9 at the outer ends of the arms --Zl of the yoke I4, as
shown in Figs; 1 and 3 ofthe drawing. A. gear be automatically controlled in a manner to prevent overloading oi the hoisting unit. Other objects will appear as the invention is unfolded by further description in connection with the drawing illustrating the mechanism in the construction and operation of whioh the objects herein set out, as-well as others, may be attained. In i said." draw-ing t Figure l isxa view in elevation of my improved larged scale of the mechanism connecting the driving power unit with the hoisting unit. and on a plane denoted by the dotted line 34:- of Fig. 1. Figure 4 is a view on enlarged scale in section on a plane denoted by the broken line 4--4 ofiEig'. 2.
Figured is a, detail viewon enlarged scale showing the electric switch and. the means and inethod for operating it.
Figure 6 is. a view in section on a plane denoted by thobroken line E -S of Fig. I. i i As shown in the accompanying drawing the hoistingmechanism is of old and well known construction and a detailed showing and description is not required herein for afull understanding of the invention, itbeing suflici'ent to state that such mechanism is contained in a chain hoist housing comprising a. front cover 6 and a back cover I spaced apart to accommodate a supporting book 8 projecting from a supporting" hook swivel 9- through the space between the covers, said mechanism further comprising parts not herein specifically described but including a load. sprocket t0 and a load chain stripper II also extending through said space and support case and motor support 22 comprising a power unithousing is. suspended between the arms 20- and: It, said case including a cap fitted: to close the open endrofthe caseand secured in any suitable to'the case adjacent the arm 21. A moto'r base 24 is formed as a part. of the case 22. and a motor ZS is'secured to the base. and
serves as a means for driving the mechanism within the case. The spindle 26 of the motor has a sprocketi'secured at its outer end and a chain?!.connects'thesprocket with a sprocket wheel zll mounted" on a stud'shaft 25 extending withinthe ease A upinion 30 rigid with the sprocket wheel-2.8 meshes with an intermediate gear 3l having an intermediate pinion32 rigid therewith and in mesh with a; driving gear 33. The gear it and pinion M3Z are suitably rotatably' mounted within. the case and the driving geanS-Cisecui'edtQ thedriving: shaft H is in mesh with thewintermediate pinion 321 The driving shaft it is rotatably mounted within the ease and has one member 35- of a flexible joint secured thereto, the other member 36' of. said joint being secured to one end of: connecting shaft3l, the oppositeend of said. shaft being connected to the hand wheel l3 by means of a spider comprising aplurality of spider arms 41] which may be. employed in such numbers as may be desired,
two being shown herein. Each of these arms terminatesat. one end in a head 41" including a v frictional shoe 44 formed to fit upon the rim of a conventional hand wheel. These arms comprise tubes formi ngspace'rs between the heads 4| and a tubular drivem'e'mber 42 into which the shaft 31* extends and to which it is secured in any suitable manner.- Bolts 43: extend through the heads 4L spacers, and drive member 42",. these bolts servingto securely clamp the members togethen. This: provides a yielding frictional. conshaft nection between my improved power unit and a conventional chain hoist without requiring any mechanical operations upon the hand wheel.
The power unit may be constructed as a separate unit for sale to present owners of standard chain hoists or such power unit may be sold complete with a chain hoist of any suitable character connected thereto, in which case the spider may be employed or equivalent means may be used as desired for connecting the extension shaft of the power unit to the hand wheel of a chain hoist, in either case the hoisting unit comprising an actuating member, as a chain operated wheel or other means, operatively connected with the hoisting mechanism for operating it, said lifting or lowering a load.
pressed inwardly will operate in accordance'with different types of switches to break the electric circuit and thereby shut off the current supplied to the motor through the wires aeb in a manner that will be readily understood. In the arrangement herein shown said switch is sup- It will have been seen from the foregoing description taken in connection with the drawing that the motor is supported underneath and in vertical alignment with the axis of thedriving When' the motor is started the resistance to its rotation offered by the connection with the hoisting unit and the load lbeing lifted thereby will, by reason of the torque established in the motor spindle, create in the motor to a limited extent a tendency to revolve the entire power unit about the axis of the driving shaft H. The resistance offered by the weight of the motor, the gearing housing and gears therein disposed, as shown will be sufficient to counteract the tendency of the power unit to revolve to a point inadequate. for
lifting the load for which the apparatus is designed, thereby cushioning said torque effect of the motor and this constitutes a material element of the invention. Should theypower unit, owing to the forces generated-by the starting of the motor, revolve to a slight permissible extent under the rated load, after normal speed is ac-- quired the unit will gradually return to its normal position in vertical alignment with the shaft By the suspension arrangement of the power unit as herein explained and its tendency to yield whenever the hoisting unit is overloaded I have created in'thepower unit a counterpoise action and this is a most essential feature of my invention; So long as the load on the hoisting unit does not exceed in weight. that for which it is designed the power'unit will maintain. its stability in its operation to raise the load. How ever, should the hoisting unit-be overloaded to such an extent that the power unit is unable to lift the load then the force'of the power unit will be exerted to raise itself and I have thus provided acounterpoise action or means for acquiring structural equilibrium which is an important feature and one that is practically new in connection with" hoistingmechanism so far as I am aware.
Therefore in order to' adjust the capacity of the device I have provided means for varying the capacity of the counterpoise action by providing for the removable application of weight of different sizes to the power unit, as herein shown and as a convenient means this weight 45 being removably afiixed to the bell of the motor case, as by inter-engaging threaded means.
' I have utilized this tendency of the power unit as a whole to revolve as hereinbefore described to limit the weight to be handled by the hoistin unit and thereby prevent overloading'and also to prevent unintentional or accidental lifting of of the supporting yoke M. I! and the extensionipower shaft -3'!.
ported on the cap 23 of the gear case and the plunger 42 extends out of the end of the switch case in position to contact with a cam 43 which is secured to or formedon the end of the arm 2| The radius of this cam will gradually increase equally in. opposite directions from the normal position of the plunger 42 up to points on diametrically opposite sides of the cam where it is desired the plunger will be moved sufficiently to break the electric circuit, and from this point the periphery of the cam will be formed concentrically with the axis thereof. As an example the normal position of the plunger 42 may be vertical under the axis of the cam and the points at which this divergence of the cam will terminate may be diametrically horizontally opposite on said cam, and from these'points the periphery-of the cam will be concentric with its axis to a point in vertical alignment with the axis of the'cam. j
Some tolerance maybe permitted for excess loading of .the hoisting uriit which may effect some slight normal revolution of the power unit but not to. an extent to cause such revolution to a point for operating the switch to shut olT the power.
reflected in the power unit causing it -to revolve to an extent to operate the switch toshut off the power and prevent further lifting of the load, thereby permitting the parts to return to normal position.
the hoisting mechanism the same action 'will take place as though an overload were placed upon the hoisting chain and this will be at once r'eflectedin the tendency of the power unit to revolve and the electric switch will be immediately operatedto shut off the'power'and prevent injury to the mee'chanism. I
The cam 43' is formed as above described so that it may accommodate itself to different types of mechanism inv which the motor spindle may the connecting mechanism and I wish therefore to have it'understood that this'connecting shaft may beara universal joint at either or both ends or that such universal joint maybe entirely dispensed with.
It will now be appreciated from the disclosure of this invention that the latter comprises a structure that is in the nature of a counterpoise in Should, however, the load on the hoisting unit be excessive this will be instantly Should excessive movement of a normal load by the hoisting'unit take place until such load comes in contact with the housing of a t-hat .tiFlGyDOWGI' innit when:peratedrwiilccounterr-balance 'vforcessset up Joy: the hoist-irrg unit; in, the action of iraising I respective nor :2 rated 51103.65, this i-coimterpoiseiactiomof: thegpower unit :being presenttduring tany normal operations-of therhoisting unit andaaffiordingrthesafety feature whenirated iloadi-upon ithei hoist) hook is: exceeded iasipre'de- .termined, resulting incabnormalioperationof the .hoistingrimit. I
i awhile vit -is vnot; absolutely essential rthat the .power unit ..-shall 1 be positioned -iw-ith the motor spindle in tvertieal alignment with the a driving :shaftmyet, it is desirablethat, said;power.;unit shall .havessubstantialiys this, position and it' -will I there i-tore he nnderstoodnthat the zparts laswshownz the xdsawing areuso aconstru'eted as to distribute the weight; to, accomplish this purp ose.
\WhiieJI have ridisclosed herein may improved power innit r-as employed 2130 eoperate ta i hoisting mechanism a I -.contemp1ate that i the.;;invention is vcapable -;of a Wider use :and :may be eemployed iorsthe operation-yof-mechanisms of various sorts sand it iis-.to-be=understoo.dthat 1 the. invention-is there-fore not. limited, not soniyato the "operation of a rsingletmechanism vbut-to fillSGnil'l connection with. app ara-tus of-iany rparticularadeseription.
. Inaccordancewith the provisionsof the-patent statutes .1. have-andescribedithe principles of oper- ,ation-i of my, invention, qtogether with i the device which 1L now-consider torepresent therbest reim- ,bodimentrtiereof; hut-Iv desire. toiiave it under- :stood that the tdevice EShQWD s is only illustrative .andthatttl'ie iinvention may 1 heicarried out i by .other means:andrappliedito uses other thanthose above set out.
HIV claim: i a
1. "In. combination i-with a chain hoisting r ,unit comprising l1 oisting mechanismsand means 1' for supporting ,saidounit,a power-iuniti comprising a (yoke having supporting arms, meansior suspendiIigr-said, yoke fromian overhead support-ea driving shaft :rotatablymounted. in. said arms, an operative ,connection .between said .driving shaft 2 and thecmechanism of said hoistingrunit, a case sup- ;ported ,.between said ,arms i and .into which said driving. shaft. extends a motor; supported by said icasegand an. operative ticonnection-wwithini the case ,between. said motor and said" drivingshaft.
2. In combination with a'chain hoistingunit comprising ,hoisting mechanism and means for and the-rmechanismwofi said! hoistingzunit aa supmorting lmrember pivotaily suspended from said -sus'pensionrmember a; motor .ca'rniedwby-ssaid supportingimembenran :openative-connection: between said motonandrsaidrdriving shaft; and an-electric iswitch'rideviceifor said-motor randaarswitch actuaatinga :device: mounted forsrelativermovement, T0116 device onreach-i of -said members, v-Wherebyw moveime-ntrof said-:supportingzmember will-ieifectsopersupporting said unit apower-unitcomprisingia suspension member, a driving shaft rotatably mounted ini-sai d. suspension member, :operative ..connection "between said driving .Yshaft and the mechanismuofi saidihoisting unit a supporting remember pivotally L mounted :on=.said driving ishaftand dependinghtherefrom a; motor affixed to saidisupporting imember below the level i015 said drivingshaft andontoperativeiconnection between said motor and said driving shaft, saidconnection including a driving-train of-qgearsr havingon of itsimembers securedutosaid. drivingtshaftvand another or its membersoperatively connected with theispin'dleiofr said motor.
3. "In ..comhination with war chain. hoisting -unit comprising hoisting mechanismand-tmeans for supporting said unit apoweruunit comprising va suspension member, a driving shait rotatably mounted insaid suspension member an operative connection .between said driving i haft randithe mechanism a. of said hoistingunit, the-power unit comprising via supporting member mounted in swinging relation to .saidsuspension;member on the axis .ofrandunderneath,saiddrivingsshaft, a motorimountedionsaid supporting memloeri-atgthe tatablih mounted in operative connectionwbetweemsaid:idriving :shaft ai'iiom-ofv :saids switch a to breakz the: electricvcurrent sup-plywtossaidiinotor. i
.75. --,In (combination with z !a chain hoisting unit comprising hoisting "mechanism sand ;:means -:.for supporting said unit, wag-POWER unit :compi-isingna suspension-member with tmeansiiorssupporting it from ,an eoverhead support,- ardriving rshaft rrotatablyrmountedi intisaid isuspension member, an operative connection between :said @driving sshaft andsthe :mechanism ofisai-drhoisting unit zaasupporting member ;.pivotaily suspended from :.:said
suspension member iorsswingingmovement;thereon, a-motori carried byt-isaid asupporting? imember, .anaoperativer connectiombetweensaid: motor-a-and saidudriving shaft wherebyiswinging movement of ithe supporting member isr-effected;= an electric switch mounted on said supportingumembernto control i supply of electric current [to ssai'd smotor, and imeans positioned 'ror ."engagementn-with said switch-as it is moved thy; movement; =0fosaid supporting \member :to operate saidgswitch to breakthe r electric: current. supply -toesaidimotor.
..6. In; ,combiination with Ea tchainihoisting ;unit comprising hoisting mechanism and omeans rfor supporting said unit ai-suspensiommember with means jior supporting it from r211 overheadssupport, .a driving sshaft rotate/hiy mountedfimsaid suspensionimember, r811 operative-connectionbetween-said: driving shaftean-d:thex mechanism :of saidhoisting: unit, -arpow'er .unit: comprising: a: gear case pivotallyr mounted: on" the: iaxisa-ofssaidxdriving vshaft, a tmotor mounted on :;said ragear rcase rbelowsfiid :dr-iving shaft; a a geared iidrivingivconnection -b etween said: motor ancrisaidrdrivingtshaft whereby eexoessive tongue in 'gsaid "Ldrivirrg :shaft wiil effect:counterpoiseiaction'.bysaidrmotor relatively [to said 'i-hoist-ing innit, 1; an rielectriciswitch mounted on said case, and -;a .switch sactuating member mountedron said suspensionrmember and positioned for contact WithfSfliid'SWltCh to operate it to out ofi athe electric i: currentwsupply to said motor. i a i 7. In combination :vvith ia :chain zhoisting unit comprising i hoisting 'mechanism and imeans for supporting said unit, a :power innit reompri'sing a suspension m em -bervwithcmeansi for. supporting it from an 1 overhead :support, a itririvingnshaft ro- '{SQrid rsuspension :i'member, -=an and: the :mechanism, of :said hoisting unit, ra supporting amember pivotally :mounted ion :the axis ofisaid driving shaft,.iaainotorxmounted on said supporting ;member :below :zsaid ridriving =sha'ft, an: operative1connectiombetweencsaid motomand said driving shaft and mounted on said supporting member, an electric switch mounted on said supporting memer and comprising an actuating plunger, and a cam mounted on said suspension member forcontact by said plunger to operate said switch to cut off theelectric current supply to said motor. i
8'. In combination with a chain hoisting unit comprising hoisting mechanism and means for supporting said unit, a power unit comprising a suspension member with means for supporting it from an overhead support, a driving shaft rotatably mounted insaid suspension member, an operative connection between said driving shaft and the'mechanism of said hoisting unit, a gear switch actuating plunger comprisedin said switch,
and a cam mounted on said suspension member for contact by said plunger in the pivotal movement of said gear case to cut off the electric current supply to said motor;
9. In combination with a chain hoisting unit comprising a hand wheel member, a suspension member for said unit, a power unit comprising a suspension device, a driving shaft rotatably mountedin said suspension device substantially in line with the axis of said hand wheel member and operatively connected therewith, a supporting member rotatably mounted in said suspension device on the axis of said drivin shaft, a motor l supported by said supporting member, and an operative connection between said motor and said driving shaft.
'10. In'combination with a chain hoisting unit 0 comprising a hand wheel member, a'suspension member therefor, a power unit comprising a suspension device, a driving shaft rotatably mounted in this suspension device substantially in line with the axis of said hand wheel member and operatively connected therewith, a supporting cated below the axis of said hand wheel member,
means for establishing the degree of swinging movement of saidsupporting member within an arc of 160 (degrees) in either directionfrom its normal position, and an operative connection between said prime mover and said driving shaft.
11. In combination with a chain hoisting unit comprising hoisting mechanism, means for supporting saidunit, and a power receiving shaft to receive power for operating said hoisting mechanism, a power unit comprising a pivotally mounted supporting member, a driving shaft within said supporting member means for rotatably supporting said drivingshaft, an operative connection between said driving shaft and said power receiving shaft, a prime mover supported by said supporting member in a plane, below said driving shaft and operatively connected. therewith and by reason of said position providing-weight in its normal position and independently of mechanical means to resist tendency of said supporting member to rotate about said driving shaft, means for readily adding weights to said power unit to increase the resistance of said supporting member against'rotation about said driving shaft caused by the resistance of said hoisting mechanism to rotation by said driving shaft, cut-off mechanism on said supporting member to control supply of power to drive said prime mover, and means on said supporting member to operate said cut-off mechanism.
12. In combination with a chain hoisting unit comprising hoisting mechanism, means for supporting said unit, a power unit comprising a pivotally mounted supporting member, a driving shaft within said supporting member, an operative connection between said driving shaft and said hoisting mechanism, means for rotatably supporting said driving shaft, a prime mover supported by said supporting member in a plane below said driving shaft and operatively connected therewith and thereby providing weight in its normal position and independent of mechanical means to resist tendency of said'supporting member to rotate about said driving shaft in opposite directions froma normal position, means on said prime mover for readily adding weights whereby the weight necessary to maintain said supporting member within a definite arc of movement in either of opposite directions from its normal position can be added to said prime 'mover to oppose the normal resistance to rotation of said driving shaft, electric switch cut-off means located on said supporting member and switch actuating means interposed in the path of movement of said switch cut-off mechanism on opposite sides of said supporting member to control supply of power to drive saidprime mover upon movement of said supporting member in either of said opposite directions.
13. In combination with a chain hoisting unit comprising a hoisting mechanism including a chain wheel shaft, a chain wheel supported by said shaft, means for supporting said hoisting unit, a power unit including a prime mover and a driving shaft operatively connected therewith, an operative connection between said driving shaft and the hoisting mechanism, said connection including spider arms and means for removably attaching said arms to said chain wheel and to a'member of said operative connection, said attaching means comprising ayielding frictional member located between said spider arms andthe chain wheel.
14. In combinationwith a chain hoisting unit comprising hoisting mechanism and means for supporting said unit, a counterpoise power and controlling unit operatively connected with said hoisting unitand including a suspension device,
a driving shaft rotatably supported by said device and operatively connected with said hoisting unit, a supporting member swingingly supported by said driving shaft and depending therefrom, a motor carried by said supporting member, and an operative connection between said motor and said drivinglsh'aft whereby torque created by said motor and the resistance of said hoisting unit will effect a swinging movement of the supporting member on said driving shaft and thereby create a counterpoise function in said power unit.
15. In combination with a chain hoist unit comprising hoisting mechanism and means for supporting said unit, a power unit comprisinga suspension member, a driving shaft rotatably mounted in said suspension member, an opera tive connection between said driving shaft and mechanism of said hoisting unit, said power unit also including a supporting member pivotally mounted on said driving shaft and thereby sup: ported by said suspension member, a power producing-member attached to saidsupporting mem her, and an operative connection between said power producing member and said driving shaft,
the weight of said supporting member being disposed to counterbalance forces set upby the chain hoisting unit in raising a load, said power unit thereby acting as a counterpoise weight for said hoisting unit.
16. In combination with a chain hoisting unit comprising hoisting mechanism and means for supportingsaid, unit, a suspension member, a power unit suspended from and for swinging action underneath said suspension member, said power unit comprising a driving shaft rotatably mounted in said suspension member, a supporting member pivotally suspended from said driving shaft, an operative connecting means between said driving shaft and the mechanism of said hoisting unit, a motor constituting a part of said power unit and ailixed to said supporting member, and an operative connection between said motor and said'driving shaft whereby the torque created insaid driving shaft efiects counterpoise action by said motor relatively to said hoisting unit.
1'7. A power unit comprisinga pivotally suspended member, a driving shaft journaled and supported on said member, a depending support solely supported for pivotal movement on and about said shaft, a motor on said support, drive 1 connections between said motor and said shaft,
means for attaching weights on the motor, a
switch and operating device for said motor, one on the suspension member and the other on the supporting member whereby predetermined movement of said supporting member will effect operation of said switch to break the electric current supplied to said motor upon predetermined resistance of said shaft to said drive motor.
RUSSELL E. NELLES.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US476793A US2374450A (en) | 1943-02-22 | 1943-02-22 | Chain hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US476793A US2374450A (en) | 1943-02-22 | 1943-02-22 | Chain hoist |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2374450A true US2374450A (en) | 1945-04-24 |
Family
ID=23893269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US476793A Expired - Lifetime US2374450A (en) | 1943-02-22 | 1943-02-22 | Chain hoist |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2374450A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2428578A (en) * | 1944-05-24 | 1947-10-07 | Union Mfg Co | Load lifting control for hoisting apparatus |
| US2512055A (en) * | 1947-06-04 | 1950-06-20 | W C Dillon & Company Inc | Safety load limiting means for hoists and the like |
| DE954004C (en) * | 1953-10-06 | 1956-12-13 | Falkenroth Maschf Geb | Additional motor drive unit for hand trains u. like |
| DE1005249B (en) * | 1952-06-25 | 1957-03-28 | Mij Tot Verwerving En Expl Van | Boat winch with detachable motor that can be attached and detached by hand |
| US3058563A (en) * | 1958-02-05 | 1962-10-16 | Mc Graw Edison Co | Means for detecting and responding to cessation of rotation |
| AT377956B (en) * | 1983-03-22 | 1985-05-28 | Bruckschloegl Max | Hoist |
| US5048799A (en) * | 1986-12-03 | 1991-09-17 | Aronowitsch Mikael E G | Manual drive mechanism for a winch or similar appliance |
| US5374035A (en) * | 1993-06-03 | 1994-12-20 | Santos; Jose C. | Winch with power train, manual operation option, and particular brake assembly |
| US6554255B2 (en) | 1998-11-19 | 2003-04-29 | Elephant Chain Block Co., Ltd. | Lifting gear |
-
1943
- 1943-02-22 US US476793A patent/US2374450A/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2428578A (en) * | 1944-05-24 | 1947-10-07 | Union Mfg Co | Load lifting control for hoisting apparatus |
| US2512055A (en) * | 1947-06-04 | 1950-06-20 | W C Dillon & Company Inc | Safety load limiting means for hoists and the like |
| DE1005249B (en) * | 1952-06-25 | 1957-03-28 | Mij Tot Verwerving En Expl Van | Boat winch with detachable motor that can be attached and detached by hand |
| DE954004C (en) * | 1953-10-06 | 1956-12-13 | Falkenroth Maschf Geb | Additional motor drive unit for hand trains u. like |
| US3058563A (en) * | 1958-02-05 | 1962-10-16 | Mc Graw Edison Co | Means for detecting and responding to cessation of rotation |
| AT377956B (en) * | 1983-03-22 | 1985-05-28 | Bruckschloegl Max | Hoist |
| US5048799A (en) * | 1986-12-03 | 1991-09-17 | Aronowitsch Mikael E G | Manual drive mechanism for a winch or similar appliance |
| US5374035A (en) * | 1993-06-03 | 1994-12-20 | Santos; Jose C. | Winch with power train, manual operation option, and particular brake assembly |
| US6554255B2 (en) | 1998-11-19 | 2003-04-29 | Elephant Chain Block Co., Ltd. | Lifting gear |
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