US158613A - Improvement in elevators - Google Patents

Description

AMHA

l lui.

UNITED STATES PATENT OFFICE.

y LEWIS wEiTLooK, vor BROOKLYN, NEWYORK.

` '|MPRQVEMENT IN ELEvAToRs.

Specification forming part of L etterslatent N9. 158,613, dated January 12, 1875; application tiled v v December 27, 1873. i I

To Vallfwhom tima-y concern Bc 1t knownthat LLEWIS `L..WE.1TLOCK,

'of Brooklyn, in the county ot' Kings and State of New-York, have invented certain new and useiul Improvements in Devices forltais'ing Weights, &c.; and I do'. hereby declarethe following ltobc a full, clear, and exact description of lthe invention, suclr` aswill i enable others skilled in thelartto which itpertains to make 'andusejin reference being had to the accompanying drawings, which forni part of this specification.

M y' "nvention relates to an improvement inl gzeviees for raising weights, such as elevators, Ln the drawings, Figure 1 showsia general view, in side clevatiomol myvinven'tiui'i. Fig;

and combinations, as hereinafter specified and claimed, wherein Eis'a irictionlpinion, to whose shaft is applied the motive'pop'er.4 El is its balance-w heel. lis a rocker-box', swinging upo n apivot, t, `1n which is journaled said friction-pinion E and its balance-wheel El. The

shaft iyof the friction-pinion E is soplaeed in' relation to `the pivote' ofthe rocker-box I that the center ot"gravity`of the wheels E El shall fall sutiiciently beyond the pivot 1", that when the pressure of the lever F is removed the friction-pulleys A E will be disengaged automatically by the weight of the wheels E E, operating the rocker-box l. A" is a drum or bullvvheel-attached to and operated with the fric ,tion-wheel A, upon which is wound the lifting-line a. Fis alink transmitting motion between the rocker-box 1.0i' the friction-pinion ll and the lever F', fulcrulned at f, and operated by the line G. D is a lever, fulerumed at d', provided with the adjust-ableweight D,

friction-brake D1, and eccentric d, said frictionbrake Dl and eccentric d engaging withthe friction-wheel A. G is a lin'e, or its equivalent, for operating the friction-brake D. The weight D2 automatically operates the eccent-ric d, as will hereinafter appear. To the lift-A ing-line ais attached vthe weight X, which,.in

the drawings, is represented as a car. Said line a passes through the top X of the car X,

theny through the spring It, which may be otrubher or other fsui'table material, and then through the arms b' of the eccentricsb,`and is fastened tothe arms b in a suitable manner. l

The arms b serve as weights to the eccentrics b. These eccentrics are connected by the link c and the idle-rollers c. B B arebars, rods, orV their equivalents, passing betweenthe eccen- Vtries b b and the idle-rollerst".` The rods B BA are secured at each ,end to the buildingr orsuitable frame, as indicated at B. Upon. the car X is attached my device for operating the lifting mechanism. I do not limit myself to placingsaid device Within or upon the car, as it may be separately placed upon any or all of the A several stories or floors of a building, or in any suitable'place olitside the car.A4 R is a disk or lever, operated by the handle R', which serves as a crank to the cog-wheel r, which engages with the cog-lever S. f This lever is jonrnaled at 'l to the bar t, at either end of which are attached the friction-pulleys t' t. u .w are Vstationary friction-pnlleys` The-pulleys au are vxed one above another, in aline parallel to and upon'theinner side of the'line' G.; ,l

likewise the pulleys 'w jw-to the line G. The pulleys u u and tl and w w and t2 may be reversed in their order to the lines G G', The line Gr is arranged to pass |down between the pulleys 'w w and tzr; Said lines G Gr' are fastened at their'lower extremities to the frame H. z is a stop-piece placed in a suitable position upon the line G, lso-that the elevator will .be prevented from rising above the point at which ,it is xed by impinging .upon it, and operating to stop the ascensionof said elevator. The friction-pinion E (sce Fig. 3) will be seen to be upon the principle of the conepulley, E2 heilig a smallerfriction-pinion than E. This cone friction-pinion is arranged to slide upon the shaft i', so that either the pinion E orE2 may be thrown into gear with the wheel A,for the purpose of giving different velocitiesy to said wheel A.

The operation is as follows: Motive power is applied to the shaft i', moving the frictionpinion E and its balance-wheel El. The balance-wheel El is made of suitable weight, and driven at such a velocityas to store in itself sufficient power to raise the weiglxtwithout material assistmicefrom the motive force. The wheels E E are journaled and swung in therocker-box I, so pivoted at'f asfto' automatically disengage from the wheel A when not desired to be employed. When it is del aired to lift: the Weight: or car X, the frictionwheel A, with its; drum A1, operated by tension upon the line lGr, operates, through the`v lever F' and' the ilink F androcker-box I, to

stop d serres? an i additioxia. l" .1'n 1ifp0se inlholdf ing the elevatoratirstg:while tholever isat its neutral-poilitwlieii ling'meversed. Shouldthe lifting-line Vaj-.lirealqthe car or. weight X- wouldbenstplegl `iii".thegfollowing' way,- (see Fig.' 2 Tl1e, liftiu'g pressure being!'reliexfeill from the ends of fthe?'eccentriciarms bg'said" arms 'of` then-Town Weight would fall, thereby opcratngjthe eccentrica b. It 4will be .seein that thefrods Bjwoulll thus be. powerfully. griped between-theeccentrica b and the idlerollers o', andlfidoxfwfnyi'ard*{notiomof the-eark or weight-Kobe'eectuallystoppei Y What lelai as my' invention iSf 1. The-combination of the friction liftingi.

wheel A with kthe driving;,frictioli-WheeliE, the latterpoisedt upon a rocker-frame, I, and

. arranged to @he lisengage@V at pleasure by mechanism,situa-ted vin the car X', substafin* iiuliy as descrbed'aud shown.

'1. The iloulile-grooved conical frction-piu- I ,Wheel and'fdrum A', the; lever D, provided :with a friction-brake, Dl

descending-,thebrake'DlL f December, 187,3.

ions E E', of differentf'ldiuumzaf.21'?,y the stationary shaft 'i',- andfalldrng-g-loosely'-: lougitudin'ally-,therwm so that' either thepmthe V-grooyedfzvliitng-yheahf'fbyfhein i backward orforwlfn the shafqfor poseof giving Vdifferent v'elocitiea-I wheel A, substantially as and.` for th set forth.

3., In. combination Hwiththe'friction-litlurl wir l' vthe c stop, tml)atantially 'Ide-M' posesahown;

have-hereuntosetfna y' an 4 gradually fstpped' by'the yfr iietion-lnaker, or case of accident, Ytlxewvhweel mayfbe vinstantly checked -by l f l 1

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