US946253A - Hoist. - Google Patents

Description

E. Y'. MOORE.

HOIST. APPLIGATIOR PILEDJUNE 9, 1996,. i Patented Jan. 11,1910.

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WITNESSES. INVENTUR.

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it may cancer-mu I 'Be it known-that I, EDWARD .Y. Moore, a

EDWARD Y. moo-anon .CLEVELAND;\ 0310;

nois'r.

Spectficationof Letters Patent.

' Patented. Jan. 11,; 91'o.

Applicaticnffiled t e 9, 1906. serial No, 320,932.

citizen. of the United States, residing at glfevelanm in the county of Cuyahoga-and I State of Ohio, have invented a certain new and-useful Improvement 'inHoists, of which ratejthe'yoke.

.- f lhepresent invention is an improvement thef-followin is a Patent 3 grated 1904 shows and claims-a hoist wherein] the raising isvaccomplished by a yoke witlriinternalteeth surrounding an exconnectedwith the main pulley, spirit of rotatable eccentrics servingtogyonthe one ust referred to and is designed to increase the efficiency of such. a. hoist. It

characterized by the employment of a of'gy'rating', yokes with internal so "arranged as tobalance' each other, reducing thefrictionon the'bea-rings and a thereby'increasing the'eiiiciency of the hoist,

Th "invention 1s he':?einafter=more fully fieecribed and. its essential characteristics setout in the claims.

.j'The gs show my improved hoist embodied in an apparatus 'suspensible from ahook having a hand chain wheel.

igurel'is a vertical cross section of the ,ho ist; Fig. 2 is-a side elevation thereof with the cover for the gears removed; Fig-3 is a a hok Cswiveled between them.

the side members of the frame is the raising chainpulley or main-pulleyD. This pulley is rotatably carried by the frame members,

plan partiallyin section; Fig. e'is a sectional', elevation taken just inside-the lefthand: frame member of Fig. .1, showing the .two'yokes in place,

'isafsimilarvrew with the left hand yoke removed; F 6 is a horizontal section through.

one of the double driving eccentrics, as indicated by the line p is a perspective, illustrating the double eccentrici j The frame of the hoist, as shown, consists of two side members A and A"bolted together at their upper ends and embracing Between the supporting means shown being a sta: tionary hollow sleeve G, which extends from one g full, clear, and exact descripton, re erence being had tothe accompany n'g' drawings. i

gears J andJ respectively.-

but omitting the gear- ,teeth on theinner yoke,for clearness; Fig. 5

66 of Fig. 4; and Fig. 7

the shaft F. Each frame member-to the other and consti .tutes virtually a portion of the frame. The

mainishaft F, of the hoist extends through the sleeve G and carries at one end a pinion H, which meshes witha pair of gears J and J which gears are connected with gyrating mechanism adapted to engage an external .gear 'd, forming an extension of the main pulley .D A suitable plate A isshown as covering the gears, being. secured to a flange a on the frame; member A;

' The description given in the above paragraph. responds to'the 'hoist'shown in my patent referred to. In that patent, however, the gyrating. mechanism connecting .the gears J andJ with the external gear (2 consists of a single yoke and two eccentrics,*one

connected with the gear J and the other with the gear J. In the present invention I provide a plurality of yokes side by side, two 1 and being shown in the drawings.

These yokes are mounted on the two mutiple eccentrics K and. K, connected When. two yokes are employed, each'eccentric is formed double as shown in Figs.

6 and 7, and comprisestwo eccentric portions Z; and is, located, in-parallel planes and extending in diametrically opposite directions. These eccentric portions have the sameaxis which is the axis of the extensions-Z'e and 7: of the double eccentric, which extensions form the journals-whereby the double eccentricis rotatably mounted in the frame members A and A. Theextension 72 furthermore provides means for securing the gear J, or J which is keyed on such. eccentric and further held by the jam nut j. Between the two portions 70 and 7c of the double eccentric is a flange portion 76* which forms a washer between theyokes E and E.

with the The double eccentric member described is preferably made of a single piece of metal.

Surrounding the periphery eccentrics k and k are a series of rollers L which reduce the friction with the yolres. The outer ends of these rollers are guided by the frame members and the inner ends by the flange k.

I 'From what has heendescribed it will be apparent that when the shaft F is rotated the two double eccentrics are simultaneously rotated causing the twojyokes E and E to te. The external gear d, and hence'the main pulley D, are thus caused'to rotate at a speed slower than the speed of rotatlon of mtion depending on the (inference-be gyration of. "the 'yokes $15 the external gears d .a small fportlcn of.

tween the number of teeth on-the external gear and the yoke.

I Where but one yoke is employed a raising force-equal to the weight of the load becomes applied to the gear d, and when this raising force is acting downward the thrust on the main bearingsis substantially twice the load. By dividing the yoke in two and: providing each eccentric device with two portions ex- 10 acting upward on the gear at wh tending in. opposite directions, one yoke is ile the other i is acting downward. The thrust on the bearings caused by this lifting force therefore I v counterbalances itself, reducing the friction won the bearing by approxi tely as much as 50% in some portions of the rotation. Likewise the lateral thrust on the eccentrics counterbalances itself, because i when one yoke is pulling in one direction and the other is pulling in the other, the downward thrust on the eccentric bearings is correspondingly referred to shows a spring,

reduced. The aggregate reduction in fric-- tion causes a very considerable increase in efiiciency of the hoist. Moreover, the raising action is much smoother.- My prior patent v helping support the weight of yoke and reducing the jerking. The present invention is more eificient and saves the expense of the spring. .The reduction in the thrust on the various bearings I also increases'the life of the hoist. Thus the vantages: operation and. longer life.

present improvement introduces three adincreased efiiclency, smoother The hand chain wheel is shown as mounted on the shaft A and connected with it through afriction brake which operates to prevent the load running down. This brake is shown and claimed'in Patent No. 7 94,997 granted to me July 18, 1905. Briefly described, it includes a metal cup Q, loosely 'journaled'on a collar P, on the shaft. The

cup has ratchet 'teeth on its exterior with which meshes a pawl Y carried by the frame,

the ratchet teeth'being in such direction that they may click idly under the pawl when the load is raised. 7

S indicates friction disks which are alter-.

natel'y secured to the collar P and to the cup Q. Gutside of the disks is a pressure plate T, against which bears the hand chain wheel N. This wheel has an inclined surface 07., cooperating with an incline 'w, on a collar W, rigid on the shaft. The result of this. is that when the .hand chain wheel is turned in the direction to cause the incline n to ride up. on the incline 'w, the-handpham wheel is forced inward, clamping the disks,

and the cup and disks rotate as a whole with the shaft and hand chain wheel. When the elevating ceases, the clamped brake holds the cup rigid with the shaft, and the pawl thusv holds the load against descandmg. To lower the load, the hand chain wheel is turned backward allowing it to' move away I said gear at different points,

from the clamping plate ,T,. relieving the disks and allowing the load, to descend,

During suchdescent the pull {on the hand chain wheel scending load.

'I claim:

1. In a hoist-, th eombination-of'twoee-f eentrics Ilgld with each other, a gear rigid with said eccentrics, a meshingdriving gear,

two gyrating members operated by said eccentrics, and raising mechanism operated by said gyratmg members. i

2. Ina hoist, the combination of. an external gear, a plurality of yokes located side by'side and having internal teeth engaging and mechanism geared together for gyrating said yokes.

3. In a hoist, the combination of an ex-. ternal gear, a. plurality of yokes having internal teeth engaging said gear at different; points, and two driving members geared-together and each havin a plurality of eccentrics for gyrating'sai yokes.

keeps it advance of .-'the 119 v .7

4:. In a hoist, the combination of a driv-.

ing gear, a shaft having two .eccentrics, a gear on said shaft connecting with the gear first mentioned, two gyrating members operated by said eccentrics, and raising mechanism operated by said gyratingmembers.

5. Ina hoist, the combination of an external gear, members placed side by side. and surrounding the external gear and having internal gear. teeth adapted to simultaneously mesh with the external gear at dif- .ferent points respectively, two driving devices, both cooperating with each member for gyrating them in orbits which are similar but differently located, and mechanism' connecting said driving devices and insuring their simultaneous operation.

6. In a hois't, thecombination of an .external gear, two yokes placed side by side and, surrounding the external gear and having internal gear teeth adapted to mesh with opposite sides. of the external gear respectively, a pair of double eccentrics each having two eccentric portio s which extend in opposite directions and re adapted to drive and guide said yokes and ing the two eccentrics.

7. In a hoist, the combination of a pulley, mechanism for rotating it, including a -plu-. rality of gyrating'members, eccentric mechanismfor gym-ting said members, said'mechanism comprising eccentrics extending from ea rin connectb C the same axis indifferent directions, one' from a common axis in difier'ent directions, ,one eccentricfor 'each'yoke, and a flange between the eccentrics serving to separate the yokes. Y

a hoist the combination of aframe, a.-' pai.r of. eccentric member's JOHIIIalEd therein, each eccentric member comprisingljtwo eccentrics. extending in opposite directions with a flange between them, two

yolges 'having openings surrounding said eccentrics, rolling members between. the

. yok'es-a-nd eccentrics and'con'fined betweensa 'idflai1g'e and. the frame, and an external 'g learin' mesh with internal gears formed on I 1D. In a hoist,

said y'okes.

v the combination with liftln'gjmechanism and a plurality of gyrating pperating members, of a plurality of driv ing members therefor, each driving member comprising two eccentrics rigid "with each other, and common means for driving said plurality of driving members.

11. In a hoist, the combination with ent members.

" 12. Ina hoist, the combination of an ex- I ternal gear and "a plurality of yokes for driving the same and operating means geared together and engaging each yoke at two. separated points.

- 13. In a'hoist, the combination of an ex- .ternal gear, a plurality of yokes having inwardly projecting teeth and surrounding said external ear, drivingmechanisms'engaging the yo ice at two points for alter- Znately moving said yokes, and movable mechanism connecting said driving mechanisms and insuring their simultaneous operation.

14. In a hoist, the combination of a pulley, a gear connected therewith, a pair of driving eccentrics, means operated by the eccentrics for rotating the said gear, said means being arranged to balance itself without the employment of a spring, and gearing connccting the eccentrics.

15. In a hoist, the combination of a frame comprising a pair of side plaies brought r gether near their tops and a hook swii'eled in said plates their junction. a pulley carried by the frame beneath the hoolg, a gear on said pulley, a plurality ofyokes surrounding the pulley, a pair of eccentrics operating in openings in both yokes, and

11a ,ingfme'chanism'anda-plurality of gyrating' rollers rolling between the peripheries of' tl1e eccentrics and the; openings in'the yoke.

'16. 1 In a hoist, the combination of a pulley, 1

internal'and external meshing gearing for driving the same, one portion of such gearing comprising'a plurality of members, a plurality of. separated eccentrics for driving said members, and gearing connecting said eccentrics together.

1'7. In a hoist,the combination of a pulley,

a gear connected-therewith, a plurality of geared members meshing with said gear, a plurality of eccentrics each adapted to operj ate with said plurality of members, and

gearing. connectin said eccentrics, whereby they operate in unison.

1-8. In a ho1st,tne combination of a pulley,

,. an external gear connected therewith, a plurality of internal gears surrounding the external gear, a plurality of eccentrics, each operating on'all of S 211d 'l11t6II13.l gears, and gearing connecting said eccentrics.

19, In a hoist, the combination of a pulley,

an external gear connected therewitln t'wo internal gears surrounding the external gear,

two sets of eccentrics, each set cooperating with both internal gears, and gearing connecting the-two sets of eccentrics.

20. In a hoist, the combination of a pulley,

.a gear connected therewith, a plurality of yokes surrounding the gear and having teeth engaging it at different pe nts, a pair of eccentric members each co jprising as' manyeccentrics' as there are yokes, which eccentricsextend 1n dlfierent d1rect1ons,-and

gearing connecting the twoeccentrics, whereby they operate in unison. V

21. In a ho1st,the combn'iation of a pulley,

an external gear connected therewith, a plurality of yokes surrounding the gear and extending onto each side thereof, a plurality of eccentric-members engaging the yokes on different sides of the gear, two mechanisms for driving said eccentric members and gearing connecting said tiivo mechanisms.

22. In a'hoist,the combination of a pulley, an external gear thereon. two internally geared yokes surrounding the external gear, two eccentric members for drivmg the yokes, each member having a plurality of eccentrics. agear on each eccentric member, and a driving gear meshing with said gears.

In testimony whereof, I hereunto atlix my signature in the presence of two witnesses.

EDWARD Y. MOORE.

Witnesses:

ALBERT'H. Barns, G. A. MYERS.

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