US1764421A - Chain hoist - Google Patents

Description

June 17, 1930- J. W. SNEDEKER CHAINHOIST Filed JuL Ly 20 1926 2 Sheets-Sheet l WNW Z/ INVENTOR Q2/7765 Mjzealer' BY 7 M ATTORNEY;

June 17,1930. J. w. SNED-EKER crmm noxsw Filed July 20. 2 Shgets-Shet 2 ffr n w I ATTORNEY i Patented June- 17, 1930 I AMEs WqSNEDEKER, OE'ADRITAN, MICHIGAN, AssIeNoRT'ro mes 'sTEEL' COMPANY, .a'co aroaa'rron-or NEW JERSEY cHAIN Heis'r Application filed. m 20,

This inventionrelatesto chain hoists, and

v has for its object the provision of a compact hoist, of a construction in which the-principal operating parts are enclosedin such a V F'Emanner as to avoidinterference therewith by the chain, cable or other device utilized to operate the same orbythe chain or cable customarily employed to sustain the load.

Another object of the 'invention is to prof vide a hoist structure which is exceptionally ing a series of intermediate gears so ar-' easy to operate, beingprovided withbearingsidesigned to reduce the frictional coeilicient to a'minimum. i

Still another object of the invention is to I provide a hoist having parts which are indi- "vidually easy to manufacture and are of an exceptionally durable nature, requiring few replacements, and not being subjectto breakage. I, i f v v I V Another object is to provide ahoist havranged as to give a very powerful ratioof operation and at the sametime adapted to j as .ijofthe same with one side member removed.

that the hoist may be utilized in installations having different requirements.

, The above objects and others are set forth and illustrated fully in the accompanying specification and drawings and are pointed out in the claims. In the drawings,

Fig. 1 is a view in elevation of a chain hoist in the construction of which my improvements are embodied.

Fig. 2 1s a simllar View, on a larger scale,

ig. 3 is a view in verticalsectionon the line IIIIII of Fig. 2.

"In the illustrated embodiment, the parts designated-by the reference numeralsjl and '2 are respectively the side members'of a hoist, adapted for use as a chain hoist, .o-r

' cable hoist, these side members being shown I la central chamber '4: adapted to receive the as disks, preferably of metal and spaced apart by suitable spacing members 3, to form 0 ,eratin instrumentalities of the hoist which are supported by the side members 1 and 2.

These members are, designed to b C i permit readychanges of the speed ratio so 1926. Serial no.-12s;so7; 1

nected 'by suitable 6,

of a suitable device, su ch' as th'ef means clevis 7.;

The operating bfythe hoist, in{ piir 'suance of an 'i-mportant object of; thezinvena tion, are -preferably all contained between these side members ordisks. Land-2. )gInlthe it now preferred. 'embodi-ment,. illustrated, I

have shownfaldrum 8, adapted torotateupon g:

anti-friction bearings, such asthe lrolls 9 travelinguponinwardlyprojecting'bosses-11a 7 and 12 which extend towardeach otherjfrlom the side members 1 and 2 respi c'tively This drum is adapted toreceive' thecable or chain 1; 13 which serves to supportthefgload; a drop sheave or pulley 15 beinghooked rails; to the load, thecajblehaving a clevis 17 securedt'o' the hoist and to which is attachedyone end of the operating cable? 01? ichainpthe latter 'i' p 1 being formed into. a; bjight l4, within which rests the drops-sheave, the other: end of'the cable being attached at 18 to p the periphery of thedrum so that it; mayibewound'hup v thereon between the radially I projecting; r

peripheries 19 of the disksil andl2. For the purpose of opera tingg the idl'llm I prefer to provide the same, withan internal g a gear 20 secured to the drum injany'gsuitable"f manner, or formingan integralpartgthereof', i

which is preferred 'forrthe' sake, of; compact ness, strength and durability, and this-in ,ternalgear-is caused to rotate'by any suitable mechanism, the preferred; 1, form ccomprisin'g a' cross-shaft 21,:1 having1 a ';driving. gear 22, and also having, a worm-gear 23 driven by p a- Worm shaft 24,;the worm-shaft'beingprm 1 f vide'd-preferably withila' pulley, 25 secured thereto outside of'the disk, in"posi'tion:yto

receive-anendless .chaimicable, or other suit-12:

able actuating; member operable" manually in well-known'fashlon. 1 T: v *1 22 with the internal gear 2O andconipactly In, pursuance .of an important; object of the inventionI provide avser1es of nteri mediate gears connecting ithe driving 1 gear a disposed between the idisks; 1 and= 2 so asto afford a very. considerabletzreductionz in the f speedratio between the? driving pulley 25 v and drum 8, thus constituting,the=hoist a3," very powerful appliance, and I also airdrum 8.

range this intermediate gearing so that they are readily accessible upon removal of one of the side members, and can be easily removed, cleaned, or changed, their relative positions being such as to facilitate substitution of certain of the gears to effect changes of the speed ratio without interfering with the other gears of the series, thus adapting the hoist for use in the different kinds of service for which it may be utilized desirably.

For the above purpose I have provided a series of gears 31, 32, 33, 34, 35, 36 and two gears 37, all mounted preferably upon the disk 1, and arranged to be exposed by removal of the disk 2, the gears meshing with each other in their numerical order, the gear 31 being actuated by the gear 22 on the worm-shaft, and the gears 37 serving to drive the internal gear 20 and rotate the Preferably two or more of the mostaccessible gears, as for example those occupying the positions indicated by the reference numerals 32 and 33, are a'dapted to serve as change-speed gears for which substitutionsmay be readily made,in well known fashion, without disturbing other g ar r I From the above description, it will readily be seen that the chain hoist forming the subject of this invention is powerful, compact, contains but few operating parts, and

I those protected by their enclosure within'the side members of the hoist; the device is easily operated, having a low frictional coefiicient by reason of the bearings; is not subject to breakage; and can be manufactured, assembled and operated atminimuni cost of materials, labor and maintenance.

I claim: I

1. A hoist of the class described, comprising side members connected together in a shaft arranged to actuate another of the gears, said shaft being mounted in bearings carried by one of the disks and adapted to be actuated by means outside of said disks.

3. A hoist of the class described, comprising side members connected together in spaced relation and a drum mounted 'rotat- JAMES w. 'SNEDEKER.

spacedrelation and a drum mounted rotat- I ably on bearings carried by one of said members adjacent to its periphery, a series of gears mounted within the space enclosed by said drum and disks, one of said gears being connected with the drum, and a wormshaft arranged to actuate another of the gears, said worm-shaft being mounted in bearings carried by one of the said members and adapted to be actuated by means outside of said hoist, includinga pulley and a flexible endless member. I T Y 2. A hoist of the class described comprisleaving theperiphery of the drum free, a

series of gears mounted within the space enclosed by said drum and disks, one of said 1 gears being connected with the drum, and

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