US1136939A - Hoisting and conveying machine. - Google Patents

Description

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HOlSTNG AND CQNVEWNG MACHNE, APmxcA'fmm mi; um'. x, mm,

STEWART.

HOISUNG AND CGNVEYIMG MACHiNE.

M. ik CQLBY L I.

APPLICATION FiLED 0C'l'.I,1914.

Paellted An. 27, 1915.

i@ Mmm@ rertical'sectional view of the machine on the'lncs 1, 1, of Fig. l, in the direction of v the arrow. l

Referring to the drawings 1 indicates an overhead tramway, in this case, preferably of the I-be'am type. Movably mounted thereon, by its wheels, 2, is a trolley 3, from which hangs an operators Acab 4. Winding drums 5 are located transversely of the trolley `with cables 6, (5, and 7, 7 thereon.. These, respectively, extend to and around opposing i pairs of parallelly arranged ` sheaves 8, 8, and 9, 9, on the trolley, downwardly to and around corresponding'pairs of sheaves 10,

i sheaves. 10, l() and l1, 11 are arranged in line,` one with the other, at each end of the head,

10, and 1.1, 11, in,l the opposite ends of a hoisting-head 12, and thence, upwardly, to

anchorages 13, on the trolley above. Thel hoisting-head 1-2 is a rectangular framework, with parallel cross-beams 14, midway of the saine, upon which is mounted a plate 15 having' a central opening 16.y Two in order that said head may be-.hung thereby from the trolley at four points.

A. lower rectangular frame 18, is rotatably connected to-tliehead 12, by a circular cast` ing composed of upper and. lower ringpartsrlii and 20,'` adapted to surround an inner' ring 21 in such position to overhang and correspond with lannular ball-bearing' raceways on saidpinner ring indicated at .22. The latter ring is, fastened to and beneath the cross-beams 14:- in the hoisting' head, and said component parts'19 and 20, of 'said casting, when assembled in their denoted places around the same, are dilll se- 4 cured in such Arelation to the frame 1 byl bolting or otherwise. At a predetermined oint on the hoisting head 12, within vhousings 48,'is located a springbolvi), which normally extends below said head and is ltractahle against its spring 50. Sockets `51 are arranged on the frame beneath, ai radial distances from the center of rotation of the frame-corresponding with the distance of said bolt therefrom, to engage said bolt asftheframe revolves, andthereby stop i' the rotation and loclcthe parts firmly to getheilnorder to unlock said parts and' permit; further rotation olsaid frame, a

pulling-rope 52 passes from the top ofsaidv f bolt over a guide pulley 53 to and around a ysecond'pfulley'. 54 on' said frame below the hollow lJournallif, thence through said jour- .nal upwardly around a sheave 55 o n the top y, of the journal. to a sheave 56 on the side of v thetrolley and backwardly around i-pulley 57 atthe rear where it extends `to a point in the cab vbelow conyenientlywithin the cab- -mans reach. In the device shown in the drawings, downwardly extending hook-arms 23 are, several-ly, pivotal] y connected to said.

frame ateachacorner exteriorly of the same, by hinges'or pivots denoted by 2e, 24. These .arms are straight anglepioccs which termi- 'nate in oppositcly disposed hooks 25, :it the lower ends thereof. 'ille hooks themselves are shown asA normally related. to the arms proper 23 and integral therewith. The pivotal Connections 24 oi" said arms to the sides oi the frame are such that, when free to more around their pivots, the arms will fall into and assume vertical positions, in the same plane with each other on the respective sides of the frame, but may be retracted toward each other around said connections when occasion requires. To effect these necessary grappling movements the two hook-arms 23 at each side of said frame are united together, from intermediate points of their lengths, by lever-bars or links 2li which have their outer ends pivoted to the hook-hars as indicated at-27 and their inner ends jointedly connected together at the junction point 76. These lever-bars should be of the same length, which should also be such that theyl will be in one and the same .straight line when the arms towhich they are connected 'occupy their normally depending positions with respect to said head 1Q; said lever-bars will overcome the inertia of said arms, and withdraw-the same from their normal posijtion, backwardlyaround their said pivotal connections, to any degree ncccssary'to clear the skids or crosspieces beneath a load dur- -ing the lowering stage of the grappling movement. In order to afford a -wider margin than usual to clear the load itself during said movement, we relate the pivot-,cori-V nections ofsaid hook-arms 23 to said frame diagonally with respect to the same, so that such connections, operatiyely considered, shall lie in the same `horizontal plane with `each other,` and at a given or predetermined angle with a transverse vertical plane passing through the frame itself. By reason of the yangular relation just described, a correspondi-ng Vand secondary motion is aforded the 'arms themselves when retracted toward eachother', which insures a wider clearance from the load during the grapplingoperation,'and, at the same time, by their slanting'attitude, the arms will serve to eifectively guide the grappler as an hole,- to its operative relation to the load to he hoisted.

To enable the operator to effect the turning movements of the grappling-frame hereinbefore referred to, mechanically from his vcustomary place in the cab, a horizontal sheave 31, commonly`known as tliebull- 7- 'wheeh'is horizontally mounted upon a hollowuprightijournal 43 securely fastened to andbene'ath a pair 'of cross-beams or members 33, in the forward part 'of the trolley 3.

-v An actuating-rope 34v is rictionally wrapped mennen around this sheave, and its ends carried laterally therefrom to and around sheaves 33 and on the trolley, and backwardly and oppositely around or fastened to a handdrum 37 near the cab. This drum is revoluyble, in both directions, by means oa crank frame 18, in line'with the path of rotationv of said holes, are two upright locking-bolts tl. Said bolts are of suitable shape and dimensions to reach and loosely fit into and engage said holes when the grappling and hoist-ing mechanism to which they pertain is raised into close proximity with the trolleyy beneath. the bull-wheel 3l. It will be evident that when said bull-wheel and grappling frame are thus interlocked, the grappling` iframe 18 and its depending load, b a simple manipulation of the hand-drum 3 may be correspondingly turned about its swivel connection to the head l2, to a distance o ninety degrees altogether, (see full-line arcs in AFig. 3) and lirrnly held in any position so gained, while the trolley with its suspended load is traversed along the trackway.

To give a like control from the cab, of the grappling movement Vof the hooloa'rms 23, from their withdrawn position toward and beneath the skids on which the waiting loads rest, a rope 42, fastened to a retriever 17, in the cab, extends forwardly t'o and around a sheave 44, on the trolley-frame opposite said bull-wheel 31, thence, transversely of said frame, to and around a sheave lthereon,l

immediately above the hollowv upright journal 48; thencef-downwardly, through said journal, and the central openings 16, inV

thehoisting head l2, and in the rings 19 and 2O in the frame beneath, when it is bifurcated, and its component branches or parts are led, respectively, to the right and left,

.in operative bearings with guide sheaves 46 ande?, in alinernent with each otherl on the under side of said frame, to the' ]unctio n points of the leverbars or links 26. By this means said lever-bars may be actuated upwardly by the operator in the cab, and the hook-arms themselves thereby moved, in unisonwith each other into their several grappling relations designed.

The diagonal pivotal connections 24, of the liooloarms 23 to the lower iframe 18,

which is a special 'form and feature of the hooks proper'25, at normal relations with is fastened to the.

the arms. The latter, however, are allixed to 'a hinge-box or iece 59 at their top which llame at the angle desired.

in said bon, indicated by 2li, is, itself, in' consequence, a corresponding angle. By this arrangement the arms will tall away from .the traine, when free so to do, at the 'same-engin as the pivot and inav be brought up or returned to their normal perpendicular position with the upper fac/e of the hooks in full bearing beneath the skids under the load to be raised.

Having thus described our said inven tion as concretely applied to a practical inachine, what we claim and wish to protect by Letters-Patent is xl. In a hoisting and conveying machine, lthe combination with an overhead trolley provided with e horizontal sheave mounted. on 'an axle and containing an annular series of grappling engagement holes, a lifting.;A head connected with the trolley, a grapple having a swivel connection with said head, a sheave-engaging bolt on said grapple in line with the path of rotation of said holes andentending upwardly through said' head,`

suitable means for raising and lowering said head and grapple with-relation to the trol ley, and means. for rotating said sheave, sub stantially as shown and described.

2. In a hoisting and conveying machine, the combination, with an overhead trolley, of a hoistingdrum, a lifting head, having an open space therein, connected with said.

drinn by cables from a plurality of diametric points on the same, and provided with a cen- Y tral hearing-ring, va grapple comprising a frame with a beaiing-ring,orming with the other ring a swivel connection between said head and grapple, hooks pivotally connected to said frame, and a sheave onsaid trolley, having annularly arranged holes therein, said' sheave being L horizontally mounted on the trolley; anv upright lockingbolt on said grapple in line with the path of rotation of said holes and extending-through said open space, together with suitable means for rotating said horizontal sheave around its said axle,'s1`ibstantially as shown and described.

3. In a, hoisting and conveying machine, the combination, with an overhead trolley, of va hoistingdrum, a lifting head, having an open space therein, connected with said druinby cables from a plurality' of diametric points on the same, and provided with a central bearing-ring, a grapple comprising a yframe with a bearing-ring, formingwith the other ring a swivel connection between said h ead and grapple, hooks pivotally con- 'nected to said frame; a sheave on said trolley, having annularlyl arranged holes therein, said sheave being horizontally mounted on the trolley, a hollow axle in vertical alinement with s'aid rings; an upright locking-bolt on said grapple iii-line with the path of rotation of said holes and extending through said open space, a hook-operating connection passing through said;v rings andl hollow axle, together 'with suitable means for rotating said `horizontal shezive around its said axle, substantially as shown and de- 5 scribed. f y

4. In e hoisting and-conveying machine, the combination, with an overhead trolley.r of a hoisting-drum, a lifting head having en open speee therein, connected with said A10 drum by egbles from a plurality of diametrie points onfthe same, a grapple-frame, having a. swivel connection with said head, and

' hook-arms pivotally connected thereto on lines in a horizontal plane and at predeter- 15 mined angles with respect to av transverse vertical plane through vseid frame, a sheave v on Seid trolley, having annularly arranged scribed.

MARK R. COLBY. J AMES STEWART.

Witnesses for Colby:

DEAN Von ACHEN., EDGAR B. MILLeR.

lil/'illnesses for Stewart:

L. P. Sirrs, G. lV. BnowNE.

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