US1318467A - Waeeen teavell - Google Patents

Description

W. TRAVELL;

HOIST AND TRANSPOHTING APPARAT-U S.

APPLICATION FILED MAR. 25. 1919'.

1,318,467. Patented OCt. 1 1, 1919.

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WARREN TRAVELL, or New YORK, N. Y.

HOIST AND 'rnalvsroarme AJEEARATUSIV Specification of Letters Eatent.

Fatented Oct. 14:, 1919.

Application filed March 25, 1919. Serial No. 284,896.

To all whom it'may concern Bait known that I, lVARREN TRAVELL, a cltizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and-useful Improvements in Hoist and Transporting Apparatus, of which the following is a specification.

This invention relates to improvements in hoisting and transporting apparatus, more particularly it relates to such apparatus in which a counterweight is employed, the purpose of the invention being to provide for the use of a counterweight in suchmanner as to balance the bucket, and a part of its load, if desired; to apply the counterweight'also to the transporting rope with some advantage in the operation of the car- 'm' age from which the bucket hangs; to make a running shift from the hoisting to the transporting functions; to obviate wear on the rope and other apparatus, particularly in the larger machines where the ropes travel either at high speed, or carrying heavy stresses; and to provide the other advantages that characterize the invention. The invention accomplishes this by providing what are virtually two extra drums, one on the shaft of or connected with the drum that operates the carriage rope, and the other on the shaft of or connected with the drum that operates the hoist or holding rope, and by hanging the counterweight in a bight of rope whose ends are wound, one on each of these two extra drums; all being so arranged that the extra drums are coupled together during the traverse action of the car riage but not during the hoisting.

In consequence, when all are coupled, the hoisting rope and the carriage rope run upon or'from their drums together and at equal speed, and the counterweight rope merely shifts from one of the extra-drums to the other without changing the length of' its bight. Thisv is the traverse action, in which the carriage moves, carrying the load, but the'load and counterweight make no change of elevation.

' When said drums are uncoupled, however, the carriage drum is heldby a brake; and the turning of the hoist drum raises or lowers the load while the movement of brake 19. The drums 14 and 18 are repreits associated drum correspondingly changes the length of bight holding the counterweight. Upon thedrums being'coupled together, as by application of a friction clutch, the carriage begins to move at the same speed as the hoist rope, so that the load ceases to change its elevation; and co-incidentally both ends ofthe counterweight rope come to move alike, so that the length of bight stops changing, and change in elevation of counterweight ceases.

It is intended that the patent shall cover, by sultable expression in the appended claims, whatever features of patentable novelty exist in the lhVGlltlOIl, disclosed.

Two forms of apparatus are'set forth'hereinafter, as an illustration of how the invention may be applied. In the accompanying drawing, which shows embodiments of the ivention:

Figure 1 is a diagram partly in plan and partly in elevation, with the divisions between plan and elevation indicated by small breaks in the rope lines; and

Fig. 2 is a similar diagram, partly in plan and partly in elevation, of a modification.

Referring to Fig. 1 ofthe drawing, 10 indicates a way, such as an I-beam, which may be fixed, or may be movable, as a boom, on which runs a carriage 11 whose position thereon is controlled by a traversing rope 12. Thisv rope, although having two separate portions, functions as a unit and is herein treated as if it were single and not broken at the carriage but merely attached thereto. At the outer extremity of the way, this rope-goesabout a sheave 13, and at the inner extremity of the way it is suitably guided to a traversing drum 14: to which both of its ends are fastened; so that a rotai tion of the drum 14L pulls the rope and so methods being already known. The hoisting rope 17 is suitably guided inboard to ahois'ting drum 18 which may be equipped with a sented as being arranged on parallel shafts,

For this as well as for other parts of V mounted in bearingsv and carrying gears 21, 22, meshing together and a clutch 23 so that these drums can either run in unison or be separated. Suitable driving means, such as an electric mtor, indicated at 25, may communicate power through gear 26 to the hoist drum 18. In operation, the hoist drum will run with the traverse drum if the clutch-23 be closed and will run alone if the clutch 23 be open, the traverse druin.

z the hoistingdrum 18. .These two drums 24,

28,,may in practice each be mere continuationsof the drums 14 and 1.8, or, ifpreferred, they may be arranged otherwise than on thesaid shifts, but rigidly connecting to the carriage and the hoisting drums respectively as .by gearing or otherwise. A coung terweight rope 27. has one end attached to drum 24, and the other to drum 28, each of its end portions being so wound upon the drum to-which it is attached that when those drums run coupled together, the rope 27 winds on one and unwinds from the other. In the particular manner of reeving illustrated in'the' diagram, the section of rope intervening between these drums has a bight in which is a floating sheave, 29, to the becket of which is attached a rope 30 which passing over suitable guide sheaves sustains a counterweight 81.

When the apparatus is stationary, the pull of the counterweight transmitted through the two limbs of the bight to the twodrums 24 and 28 pulls on the drum 24 in direction opposite to that in which the carriagerope 12 pulls on'the drum 14, and it will be observed that the weight of the bucket and its load, hanging on rope 17 over sheave 16 on the carriage, tends to pull the carriage inward along the way 10. I The stress thrown upon the brake '15 in holding or controlling the carriage is therefore reduced materially by the counterweight 31. The other limbv of v the bight pulled by the counterweight-is con-. nected to the drum 28 so that the pull of the counterweight transmitted through it to that drumopposes the pull of. the hoistingrope 17 and load 17 is raised, and in like manner reducingthe wear imposed upon the brake 19, and the stress required of it in holding .the load.;

. The operation of making a running shift from a hoisting toa traversing action is ex tremely, simple and is effected by the closing of the; clutch 23. For the hoisting action, the

clutch 23 is open and'drums 14 and 24 are held still. The motor windsrope 17 on drum 18, and at the same time turns drum 28, permitting rope 27 to unwind therefrom,

rapidly as it is unwound from drum 28,

with theresult that the counterweight ceases descending. The hoisting rope 17 and the direct carriage rope12 come in at an equal rate and are wound on drums 18 and 14,

while the indirect part of thecarriage rope runs off of druin14 and out through the indirect course at the same rate. When the inward end of travel is reached, the operator reverses the motor, whereupon the load.

will be lowered, with the counterweight,

helping hold thecarriage stationary, if the drums 14 and 24 are held still. The running of the motor thus in reverse direction winds the rope 27on drum 28, raising the counterweight, .while the rope 17 is unwound from drum 18, letting the load down. I Gr, dumping the load from its elevation at the inward end oftravel, the starting of. the

motor in the direction for outward travel,

withclutch 23 remaining closed, 'reverses the action first described, with a running shift from the traverse movement tothe descending movement of the bucket occurring when the clutch 23 is thrown out and the brake 15 is applied.

The apparatus. thus provides means'forf applying the counterweight to both the hoisting and the traversing ropes, reducing the motive power that would be required in its absence, and provides for theoperation tional application to the moving parts,. eX-

economically when worn. V

I It is obvious that many variations niay beh made in the particular, forms of apparatus chosen. for practising the invent on.

The

of the apparatus without the application of .rope grips or any sort. of damaging fric- 1 4111111152 1- and 28 of Fig. are, for example, not necessarily on the, same shafts as the drums 14 and '18, and 1 an embodiment is illustrated in Fig. 2, which does away with the eXtra drums altogether. In that figure, in which the way, carriage, and ropes associated therewith, and the counterweight and its ropes are seen in elevation, while the drums and their associatedparts are. seen in plan'view, thedrums 14 and 18.,correspond to 14 and 18 respectively of Fig. 1, and they are driven by a motor 25 .ancl are connected by gearing 21, 22, and a clutch 23" which may. be a combined clutch and brake forthe drum 14 operated by a single lever of any ordinary 'or suitable design. "The peculiarity of this isthat the holding rope 17 on the backside to the counterweight 31 after going around its .drum .18. runs off which hangs in a bight thereof, and thence runs to the drum 1e, around which it passes I enough to have a firm grip, and whence it runs off on the forward side as the traverse rope 12, going to the carriage, to the outer end of which it is fastened. At the same time, the other section of this rope 12 runs from the inner end of the carriage to the drum 1%. For elevation of the load, rope 17 is drawn in by drum 18 in the right of the figure, and paid out at the left, allowing the counterweight to descend, because the drum 1% is meanwhile held uncoupled and stationary by its brake. But for the running shift from hoist to traverse, the movement of the brake lever will release the brake and set the clutch so that drum 14 begins to be driven from drum 18, and the counterweight rope 27 then is wound upon drum i l and is simultaneously run off therefrom to pay in the carriage. Thus a single rope extends from the load around the drums and the counterweight to the carriage, the counterweight acting on both load and carriage, and the shift being executed while running without any gripping or other undesirable friction of ropes.

I claim as my invention:

1. Hoisting and transporting apparatus including a hoisting rope and a drum therefor with motor and a traversing rope and a drum therefor with brake, and with coupling to the hoisting drum, in combination with another rope and a counterweight held in a bight thereof, which counterweight rope at one end of the bight is held and moved with the said hoisting drum and at the other end of the bight is held and moved with the said traversing drum, so that during hoisting and lowering operations the counterweight is lowered and raised respectively and during transporting operations the counterweight is held stationary.

2. Hoisting and transporting apparatus including a hoisting rope and a drum therefor with motor, and a traversing rope and a drum therefor with brake, and with coupling to the hoisting drum, in combination with another rope and a counterweight held in a bight thereof; and drums, holding said counterweight rope at each end, connected severally with said first mentioned drums, and arranged to shift the counterweight rope between themselves, off of one and upon the other, when the said hoisting and traversing drums are coupled.

8. Hoisting and transporting apparatus including a hoisting rope and a drum therefor with motor, and a traversing rope and drum therefor with brake, and with coupling to the hoisting drum, in combination with another rope and a counterweight held in a bight thereof; and additional drums, severally on the same shafts with the first mentioned drums, each holding one end of said counterweight rope and arranged to run the two end portions of said rope in the same way of the rope when thelr sald shafts &

are coupled, and to run one end only of said rope when their said shafts are not coupled together;

4:." In hoisting and transporting apparatus, the combination of a way; a carriage traveling thereon; a hoisting rope depending from said carriage and a drum to which it leads; traversing ropes attached to said carriage and a traversing drum to which they lead; means for driving and controlling said hoisting and traversing drums; a counterweight rope and a counterweight suspended from a bight thereof, which counterweight rope has one end attached to said hoisting drum and its other end attached to said traversing drum so that during hoisting and lowering operations the counterweight is lowered and raised respectively, and during traversing operations, the counterweight is held stationary.

5. In a hoisting and transporting machine, the combination of a way; a carriage traveling thereon; a hoisting rope depending from said carriage; a hoisting drum to and around which said rope runs and whence it is continued as a counterweight rope; a traversing rope attached to the carriage and a traversing drum to which it runs; a second traversing rope attached to the carriage from a direction opposite to that of the first traversing rope and leading to the said traversing drum and wound around it in a direction opposite to that of the first traversing rope, and continuing thence as the other end of said counterweight rope; a floating sheave in a bight of said counterweight rope; a counterweight suspended therefrom; and means for driving and controlling said hoisting and traversing drums.

6. In hoisting and transporting apparatus, the combination of a way; a carriage traveling thereon; ahoisting rope depending from said carriage and a hoisting drum to which said rope leads; two traversing ropes attached to said carriage from opposite directions and a traversing drum to which they lead; means for driving and controlling said hoisting drum; means for coupling said traversing drum to said driving means and controlling same; a counterweight drum connected to the hoisting drum; a second counterweight drum connected to the traversing drum; a counterweight rope having its ends attached to the two counterweight drums; and a counterweight suspended from a bight in the counterweight rope.

7. In hoisting and transporting apparatus the combination of a way; a carriage traveling thereon; a hoisting rope depending from said carriage, and a hoisting drum to which said rope leads; two traversing ropes attached to said carriage from opposite direcend attached to the counterweight drum; tions and a traversing drum to which they and a counterweight suspended from a bight' lead; means for driving and controlling in said counterweight rope. V V 10 said hoisting and traversing drums; a coun- Signed at New York, N. Y., this 10th day terweight drum connected to the traversin of March, 1919.

drum; a counterweight rope having one end attached to the hoisting drum and its other WARREN TRAVELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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