US1298340A - Bucket. - Google Patents

Description

L. J. HATT.

BUCKET.

APPLICATION FILED ocr.12.u911.

1 ,298,340. Patented Mar. 25, 1919.v

3 SHEETS-SHEE.T l-

[We 0 o o o 1 a Invenior:

L. J. HATT.

BUCKET.

APPLICATION FILED OCT. 12. 1911.

Patented Mar. 25,1919.

3 SHEETS-SHEET 2.

i o L 9 9 Q- L. J. HATT.

BUCKET.

APPLICATION map OCT. 12. 1911.

Patented Mar. 25, 1919.

3 SHEETS-SHEET 3.

I nveor Alga 7,412:

Elli thereof.

- or jaws to cause LEMUEL J. HA'IT, OF ST. LOUIS, MISSOURI.

sucimr.

To all whom it may concern:

Be it known that I, LEMUEL J. HATT, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Buckets, of which the following is a specification, reference being had to the accompanying drawings, forming a part This invention relates to certain new and useful improvements in buckets of the class employed in excavating, dredging, hoisting, and conveying, and in the present instance I have shown'my improvements in a bucket bucket embodying my present invention;

of the type commonly known as the clamshell bucket.

In the bucket .shown herein, as in the bucket shown and described in Letters Patent No. 1097317, issued to me May 19, 1914, I employ a supporting-head or upper center, a lower center, and two lines or cables, one the hoistingline or supporting-cable, as I will call it, forsupporting and raising and lowering the bucket, and the other the closing-line or load-cable,

as I will call it, for closing the trays or jaws of the bucket upon the material being operated upon. The closing of the trays is effected by means of a tackle device comprising a series of rotatable sheaves or pulleys in both the upper and lower centers of the bucket, around and over which the closing-line or load-cable is reeved, power being thereby applied upon the trays the bucket to dig efliciently. The supporting-head or upper center in my present bucket is also equipped with additional sheaves or pulleys, which take the bight of the hoisting-line or. supportingcable. The bucket as a whole thus working in the bight of the hoisting-line or supporting-cable, not only are strains upon the cable and also the trolley, when the bucket is used in connection with bridges and cable-ways, balanced or neutralized, but the bucket also may be both hoisted and trolleyed at the same time without the employment of a compensating device in the operating machine.

The objects of my present invention are to provide a strong, durable, powerful, and eflicient bucket of the kind stated which may be operated with facility at hlgh speed and in which the upper and lower centers and trays or aws are maintained with rlgldity Specification of Letters Patent.

4 Fig.

- spectively,

Patented Mar. 25,1919.

Application filed October 12, 1917; Serial No. 196,198.

in proper operative alinement under substantially all working conditions and strains upon the severalparts distributed with evenness' throughout the bucket, and to improve generally upon, and simplify the construction of, buckets of the class described.

. With the above and other objects in view, my present invention resides in certain novel features of form, construction, arrangement, and combination of parts, all as will herelnafter be described and afterward pointed out in the claims.

In the accompanying drawings,

Figure 1 is an end elevational view of a Fig. 2 is a side elevational view thereof with the trays or jaws of the bucket in closed position;

Fig. 3 is a vertical sectional view through the bucket with its trays or jaws in open position;

Fig. 4 is a plan view of the supportinghead or upper center of the bucket, the supporting and load cables being omitted;

5 is a plan view of the lower center of the bucket, the loadcable being omitted;

Fig. 6 is a view partly. in side elevation and partly in section of the lower center;

Figs. 7 and 8 are elevational views, re-

wedge-member employed in pivotally securing the tray-arms to the lower center;

Fig. 9 is a view, partly in elevation and partly in section, of the upper rear end of the trays or jaws, illustrating the means preferably employed for pivotally securing to the trays the supporting-head connectingrods or bars;

Figs. 10 and 1,1 are elevation and partly in section, sheave-casing or housing;

Figs. 12 and 13 are similar views of the upper sheave-casing or housing;

Fig. 14 is a fragmentary sectional view of the supporting-head or upper center, illustrating one of the sets of guiding-sheaves for the closing or load-cable; and

i Fig. 15 is a similar view, illustrating one of the sets of guiding-sheaves and also one of the main sheaves for the hoisting-line or supporting-cable.

Referring to the said drawings, in which like reference characters refer to like parts throughout the several views, the cooperatdetail views, partly in of the lower ing trays, bowls, or jav s. as they are variously called, of the bucket, which, when open and while closing, act or serve as digging members in picking up the load and, when closed, also form or provide the receptacle for hoisting and carrying the load, are each preferably built up structures of the shape or form shown, each comprising a bottom preferably gradually convexed wall or pl te 1 and sidewalls or plates 22. To correspond with the convexity of bottom wall 1, side Walls 2-2 are wider or of greater depth at their inner or front ends than at theirouter or rear ends, the marginal portions of wall 1 being flanged upwardly and riveted or otherwise rigidly fixed to side walls 22. Each side wall 2 at the rear of the tray is formed with or terminates in a projecting ear or extension 3, for purposes hereinafter appearing. The trays are also, as is common in buckets of this class, to increase their digging efliciency, provided at their inner or front portions with preferably renewable both side and bottom cutting'plates or edges 4 and 5, respectively. Rive-ted or otherwise fixed at their lower ends to the upper edgeportions of side walls or plates 2 2, are Somewhat angular rigid extension-plates or arms 6-6. .At its upper end, each arm 6 is rounded as shown and has riveted or otherwise fixed thereto and preferably upon each side thereof a correspondingly shaped reinforcing and thickening plate 7 each arm Gwith its plat-e or plates 7 being suitably transversely apertured to accommodate a headed pivot-pin 8.

I The lower center of the bucket is preferably a comparatively heavy box-like casting having a rounded bottom wall 9, flat side walls 10-40, and end walls 11 11 also flat upon their outer face, as seen particularly in Fig. 6. This lower center or casting is adapted to contain and house the lower trayopening-and-closing sheaves and also to receive and contain a suitable lubricant for not only lubricating such sheaves, but also preserving and maintaining the flexibility. of the closing or load-cable which, in the finished bucket, is reeved aroundthe sheaves mentioned. The bottom wall 9 of the lower center is, as shown, provided with a suitable lubricant drain-outlet 12 normally closed by a suitable removable stopper 13. At each end, the lower center is formed with an outwardly projecting extension-wall 14 having a depending portion 15 apertured to accommodate, and being adapted to provide a bearing for, a tray-arm pivot-pin 8. Each extension-wall 14: of the lower center is thin-y ner at its edges than at its center, the under surface of each such wall 14: being suitably beveled in a direction from approximately the center thereof outwardly toward the sides of the casting, as seen particularly in Fig. 6 and as indicated by dotted lines in Fig. 2, to provide the oppositely-disposed upwardly inclined faces 14:"14 for purposes hereinafter appearing.

To the lower center, the extensions or arms 6 of the trays are pivotally fastened, the upper reinforced ends of a pair of said arms, one from each tray, being fitted as shown between an end wall 11 and its adjacent extension-wall portion 15 and a pivotpin 8 inserted into the then registering apertures in said wall-portion 15 and arms 6, a reduced extension 8 on the pin fitting into a suitable aperture in the end wall 11 of the casting. Suitable registering transverse bores in end wall 11 of the-casting and in reduced end-portion 8 of the pin 8 being provided, a wedge-shaped locking-pin or the adapted to communicate, when pivot-pin 8 is seated, with a bore or way 19 in the pin; communicating with the latter in -pin'8 are outlet paths or ways 202O leading to the tray-arms 6, whereby, througha system of lubrication, the tray-arms 6 at the pins 8 l i are continuously lubricated under substantially all working conditions to whichthe.

bucket may be subjected. The upper or feed end of lubricant-bore or way 18 is normally removably closed by a suitable plug or stop-. per 21.

The supporting-head or upper center of the bucket is preferably an open or skeleton casting having the shape or form shown and comprising side walls 2222, end walls 2323, and diagonally disposed intermediate walls 24.-.24.'between which latter walls the upper tray-opening-and-closing sheaves are arranged, as hereinafter more fully appears. Side and intermediate walls 22 and 24:, respectively, are preferably braced or strengthened by webs or the like 25. Adjacent each end and at diagonally opposite points, the casting is formed with vertically bored portions 26 for purposes hereinafter,

appearing and which, in the assembled or completed bucket, are approximately in vertical alinement with diagonally opposite cor ners of the chamber of the lower center. Each end wall 23 of the upper center casting is formed approximately centrally with a ver- "tically bored portion 27, in vertical alinement with which is a second bored portion 28 formed on a short rigid approximately rectangularlug-portion 29 depending from, and forming substantially a part of, the casting as seen particularly in Fig. 15, said alining bored portions 27-28 providing a the bucket and journaled to freely rotate between thefyoke-plates 32 at points adjacent the opposite ends of the upper center, is a pair of grooved pulleys or sheaves 33-33 adapted to take the bight of the hoisting or supporting-cable S for supporting or holding and libisting the bucket as a whole. ,At each of its corners, as seen particularly in Fig. 4, the upper center casting is formed with a pair of spaced ears 3434.

3535 gindicate the connecting-links or bars for 'pivotally fastening the trays or jaws of the bucket to the upper center casting.

these linksor bars, there are preferably four, two foreabh tray, the upper ends 5f these links 01' bars 35 being positioned, respectively, between a pair of the ears 34 and suitably pivotally fastened thereto by pivot-pins or the like 36 held from turning in their bearings by check-pins not shown The manner ofipivotally fastening the lower ends of the connecting-links or bars 35 ,-to the trays is'i'liown in detail in Fig. 9. Ala-there shown, each link 35 is formed or proyided at its lower e'iidwith an apertured enlargement or hub 37-, the'hubs 37 of a pair of the links 35 abutting flatwise at their respective outer faces upon'the inner faces of ears 3 of the particular tray. Disposed between said hubs 37 and extending transversely of the tray, is a tubular or pipemember 38 provided adjacent its ends with pairs of diametrically opposite or registering openings 39, a washer or the like 40 being interposed between each hub 37 and the adjacent'end of the pipe-member 38. Projected lengthwise through each tray-ear 3 and its abutting link-hub 37, is headed pivot-pin or the like 41 having a reduced ex- I tension 42 fitting into the pipe-member 38. the pin-extension 42 being suitably transversely apertured to provide the same with a cam-face, as at 43. Extending through the aperture in said pin-extension 42 and also through a pair of the registering openings 39 in pipe-member 38, is a Wedge-pin or the like 44 engaging camwise with theIeiim-face 43 of the pivot-pin 41, the pair of links 35 being thus securely fastened pivotally to the particular tray orjaw of the bucket. The wedge-pins 44 are preferably held from removal by cotter-pinsor the like 45. Adjathe tipposite or form to conveniently and neatly fit the' lower center casting, the several plates 48 being transversely bored to accommodate a sheave-shaft 49 and being securely held to gether in properly spaced relation by means of tubular spacing-members 50 and through- I bolts or rivets 51, as illustrated particularly in Fig. 11. Rotatably mounted on the sheaveshaft 49, which extends through, and has a bearing in, the side walls 10 of the lower center and which also extends through the several plates 48 and holds the same against removal from the lower center, is a series of independent grooved pulleys or sheaves 52. These pulleys or sheaves 52, preferably four in number and around which the closing or load-cable L is reeved, form one part of the tackle-device for clos ng the trays or jaws of the bucket, the several pulleys or sheaves 52 being disposed respectively in the several compartments or divisions of the lower center provided by the plates 48 which latter, being positioned, as seen particularly in Fig. 3, not only between the sev eral respective sheaves 52', but also between the outermost sheaves 52 and the side walls of the lower center casting, serve to guide the line or cable L and prevent the same from slipping out of or jumping the grooves of the said several sheaves 52.

Fixed fiatwise upon the outer face of one side wall 10 of the lower center casting, is a keeper-plate 53 formed or provided with a squared aperture adapted to take or seat a correspondingly squared extension 54 on one end of the sheave-shaft 49 to hold the shaft 49 from turning in its bearings, the plate 53 together with a cotter-pin or the like 55 projected through the shaft-extension 54 holding the shaft 49 from working loose or accidental removal.

As seen particularly in Fig. 3, the sheaveshaft 49 is longitudinally bored to provide a lubricantway 56, communicating with which in shaft 49 are transverse outlet ducts 57 leading to the several respective pulleys or sheaves 52, whereby also through a system of lubrication, the several sheaves 52 a e continuously lubricated at their hubs under substantially all working conditions to which the bucket may be subjected. The outer or feed end of way or bore 56 is normally reniova bly closed by a suitable plug or stopper 58.

Likewise fitting between intermediate walls the casting walls 24, whereby the upper,

sheave-casing as an entirety is securely held 1n operative position in the upper center casting. Rotatably mounted on the sheaveshaft 60, which extends through, andh'as fa 7 bearing in, said intermediate walls 24 of the upper center casting, and which also ex.- tends through the several plates 59, is a second or upper series of independent grooved pulleys or sheaves 63. These upper sheaves 63, preferably three in number and around which the closing or load-cable L is'al'so reeved, form another part of the tackle device for closing or operating the trays or jaws of the bucket, the several pulleys or sheaves 63 being similarly disposed respec tively in the several divisions of the upper center casting provided by the plates 59,

which latter also, like the lower sheave-cas-.

ing plates 48, serve to guide theline or c'able L and prevent the same from slipping out of or jumping the grooves of the said several sheaves 6 Upper sheave-shaft 60, like lower sheaveshaft 49, is formed with a squared end-extension 64 and is similarly held from turning in its bearings and from removal by means of a keeper-plate 65 fixed flatwise upon the outer face of one intermediate wall 24 of the upper center casting and accommodating said shaft-extension 64 and a cotter-pin or the like 66 projected through the extension 64:, as seen particularly in Fig. 1. While not specifically shown, I also provide for the upper sheaves 63 a system of lubrication similar to that shown and described in connection with lower sheaves52.

Mounted to freely rotate or swivel in the vertically bored portions 26 of the upper center casting, are tubular guide-pulley supporting-members or thimbles 67 for the line or cable L. Each member or thim-ble 67 is preferably provided at its ends with collars or the like 68-68, as seen particularly in Fig. 14, which serve to prevent endwise movement of the thimble relatively to'the supporting-head or upper center casting. Each thimble 67 is also formed or provided at its upper end with a pair of upwardly projecting suitably spaced plates or Wings 6969, between which are journaled to freely rotate a pair of grooved idler pulleys or sheaves mounting upon the upper center casting of 707O havin their axes at different elevations, one ob iquely above. the other, relatively to the upper. center casting, the pulleys or sheaves 70 being so journaled and spaced obliquely one below the other and with their peripheral portions in such relation that for parts of their rotary travelthe peripheral or grooved portions of both pulleys Will not only rotatein the same horizontal plane relatively to the supportinghead, but also in a plane vertically in alinement approximately with the bore of their supporting-thimble, as illustrated particularly in Fig. 14, and hence approximately also in vertical alinement with one of the outermost of the lower sheaves 52.

The reeving of the closing or load-cable L around the sheaves 52 and 63 in my present bucket is substantially similar to the reeving of the cable Las shown and fully described in said Letters Patent N 0. 1097317 hereinbefore mentioned, and hence specific description thereof will be here omitted. And in such reeving, as the line or cable L is threaded between the respective pairs of pulleys or sheaves 70 as it enters and leaves the bucket, the pulleys or sheaves 70 serve as anti-friction guides therefor, and by their described relative arr'angement and swiveled the bucket, the pulleys 70 prevent wear upon or cutting of the line or cable L .under substantially all working or operating conditions, irrespective of the position of the bucket.

Riveted to the upper casting end Walls 23 and their lugs 31, are spaced'pairs of upwardly projecting plates or wings 71, between which are journa-led to freely rotate pairs of grooved idler pulleys or sheaves 72, the pulleys 72 of each pair thereof having the same. arrangement relatively to each other as the pulleys or sheaves 70 of each said pairs have to each other, as hereinbefore described. The pulleys 72, however, are adapted to ,serve similarly as anti-friction guides for the hoisting or supporting-cable S and to prevent cutting or wear upon the line or cable S as it enters and leaves'the bucket and in any position of the bucket under substantially all working or operating conditionsfthe line or cable S, which, in practice, is usually fastened at one end to some suitable fixed point on the boom, derrick, run-way, or the like, being first threaded through a pair of the sheaves 72, then led down to and under one of the main supporting-cable sheaves 33, then across to the grooves of the sheaves 33; and that the neeaaeo sheaves 83 will freely work in the bi ht of the holding or supportingcable the guide-sheaves 72 are in such vertical alinement relatively to the sheaves 33 that the line or cable S, as it passes from one pair of sheaves 72 to one sheave 33 and back from the other sheave 33 to the other pair of guide-sheaves 72, is always approximately straight.

At its lower end, each of the slidable pins is formed or provided with a pair of oppositely disposed lateral wings or cars 73. As seen particularly in Figs. 2 and 3, each of the pins 30 is disposed approximately centrallyat the side of the bucket between the upper ends of a'pair. of the tray-connecting-bars 35. Having their lower or inner ends pivotally fastened to the wings or ears 73 of the respective pins 30, are pairs of oppositely-disposed laterally and upwardly projecting links 7 4, the upper or outer ends of the llnks 74 being pivotally fastened to lugs or ears 7 5 formed or provided on the tray-connecting-links 35. By means of the pins 30 and links 74-, the upper and lower centers of the bucket are always kept or maintained in proper operative alinement under substantially all working conditions and irrespective of the position of the bucket. To prevent any binding engagement between the inner ends of the links 74 and theupper center casting in the move-.

ments of the pins 30, the pins 30 are preferably provided adjacent their lower ends with collars or the like 76 adapted to abut against the lower ends of bored casting-portions 28 as the pins 30 move upward in the opening and closing of the trays or jaws of the bucket.

The operation and handling of my present bucket is also substantially similar to the operation and handling of the bucket shown and described in said Lettrs Patent No. 1097317. By means of the supporting or holding-cable S, the bucket as a whole, with its trays or jaws either in open or closed position, depending'upon the winding of the closing or load-cable L on its winding-drum,

may be hoisted and held or supported in various raised or lowered portions relatively to the material being operated upon, the sheaves 33 working smoothly in the bight of the two-part line or cable S and :the idler sheaves 72 protecting the line or cable S from being cut or worn as it enters and leaves the bucket and irrespective of the posit-ion of the bucket under substantially any working conditions, as hereinbefore described. Due to the spaced relation of the sheaves 33, bending strains on the line or cable S are reduced to substantially the minimum. To open the trays or jaws of the bucket, the load or closing-cable L, reeved around the upper and lower series of sheaves 63 and 52, respectively, as before mentioned,

is released and permitted to unwind from its winding-drum, when lower sheaves 52 will drop by gravity, the trays or jaws opening, the opening movement of the trays or jaws of the bucket being accelerated by the weighted lower center casting. The beveled faces l4t1.i of the lower center casting now come into play, the engagement therewith of the upper edges of the reinforced ends of the tray-arms 6 limiting the opening movement of the trays or jaws. On the line or cable L being caused to wind upon its winding-drum, the trays or jaws of the bucket are brought to closed position by the power exerted thereupon through the tackle device described, the trays or jaws in such closing movement digging into and scooping up the sand, gravel, ore, or other material being operated upon. In the present bucket, the tray connecting-rods or links 35 are of somewhat extended length, and hence, the links 74: further being pivotally fastened to the links 35 at a point adjacent their upper ends, the pins 30 in each opening and closing movement of the trays or jaws have a limited reciprocatory up and down movement in their bearings, these pins 30 and the pivotally connected or fastened links 74:

,efiectually stabilizing the upper center rela tively to the lower center and efficiently and simply maintaining the upper and lower centers in operative alineinent irrespective of any turning or twisting movement or other position of the bucket under substantially all working or operating conditions. The upper sheaves 63 being angularly disposed relatively to the lower sheaves 52, the torsional or twisting strain on the line or cable L is less than were the upper sheaves I 63 in vertical cooperating alinement with the lower sheaves 52, and in my present bucket, as in the bucket shown and described in said Letters Patent No. 1097317, there is little, if any, liability of the cables or lines slipping out of or jumping the grooves of the respective sheaves, unnecessary stoppage of the operation of the bucket and unnecessary wear and tear on the cablesbeing thereby obviated. From the description given, taken in connection with the accompanying drawings, it will be observed that the several parts of my present bucket may be conveniently assembled and renewed when required through breakage or other cause; and it will be understood that changes in the form, construction, arrangement, and combination of 'the several "parts of my bucket may be made 1. A bucket of the'class described, the

same including a supporting-head or upperv center, a movable lower center, sheaves mounted for rotation in the upper and lower centers, cooperating load-trays, connectingbars pivotally connected to the upper center and to the trays, arms on the trays pivotally connected to the lower center, and a closing line cooperating with the upper and lower sheaves to lower and raise the lower center and thereby open andclosethe trays,

10 in combination with means for maintaining the upper and lower centers in working alinementin the operations of the bucket,

said means comprising pins mounted for endwise slidable movement in the upper cen'-.

l5 ter, and links pivotally connected at their .opposite ends to said pins and to said connecting bars.

2. A bucket of the class described, the

same including a supporting-head or upper center, a movable lower center, sheaves mounted for rotation in the upper and lower centers, cooperating load-trays, connectingbars pivotally connected to the upper center and to the trays, armson the trays pivotally l connected tothe lower center, and a closing line cooperating withithe upper and lower sheaves to lower and raise the lower center and thereby open and close the trays, in combination wit-h means for maintaining the upper and lower centers in working alinement in the operations of the bucket, said means comprising pins disposed vertically relatively to the upper center, said pins being mounted in the upper center for endwise slidable movement relatively thereto, and links disposed laterally of the pins and pivotally connected at their ends to said pins and to said connecting-bars, said pins having a reciprocatory up and down movement on each opening and closing movement of the trays.

3. A bucket of the class described comprising, in combination, an upper center provided at its ends with oppositely disposed pairs of bearing-ears and with pinbearingsintermediate said pairs of ears, a

movable lower center, sheaves mounted for rotation in the upper and lower centers, cooperating load-trays, connecting-bars pivotally connected to the trays and to the ears of the upper center,rigid arms on the trays pivotally connected to the lower center, a closing-line cooperating with the upper and lower sheaves to lower andraise the lower center and thereby open and close the trays, and means for maintaining the upper and lower centers in working alinement in the operations of the bucket, said means consisting of pins disposed vertically relatively to the upper center, said pins being mounted in said pin-bearings for endwise slidable movement relatively to the upper center, and links disposed laterally of the pins and pivotally connected at one end to the connect- .65 ing-bars at a point intermediate the ends of arms on the trays having this upper ends meaeae the connecting-bars and at their other end to the lower ends of said pins, the pins having a reciprocatory up and down movement on each opening and closing movement of the trays.

4:. A bucket of the class described comprising, in combination, a sheave-frame, op positely disposed extensions projecting outwardly from opposite walls of the sheaveframe, ears depending from said extensions in parallel relation to, and spaced outwardly from, the adjacent Walls of the sheaveframe, load-trays, rigid arms on the trays having their upper ends disposed between said ears and the adjacent walls of the sheave-frame, and pins projecting loosely through the upper ends of said arms and having a bearing in said ears and in the said adjacent walls of the frame for pivotally fastening the trays and sheave-frame together.

'5. A bucket of the class described com-. prising, in combination, an upper center, a movable lower center, cooperating loadtrays, connecting-bars pivotally connected to the upper center and to the load-trays, oppositely disposed" extensions projecting outwardly from opposite walls of the lower center, said extensions being provided on their under surfaces with op- 95 positely disposed oblique faces, ears depending from said extensions in parallel relation to, and spaced outwardly from, the

adjacent walls of the lower center, rigid disposed between, and pivotally connected to, the ears and the adjacent walls of the lower center, and mechanism for'lowering and raising the lower center and thereby opening and closing the trays, said extensions at their oblique under faces and said rigid arms at the upper edges of their upper ends being adapted to engage to limit the downward movement of the lower center and the opening movement of the trays.

6. In combination with a bucket of the class described, a tray having apertured earportions, connecting-bars having aperturs at their lower ends, said bars being respec tively disposed adjacent said cars, a tubular member disposed transversely between said apertured portions of the bars, pivot-pins projecting through the apertures of said ears and bars and into said tubular-member for pivotally securing the bars and tray together, and wedge-keys projecting through said tubular-member and said pins for securing said pins against removal.

7. A bucket of the class described com-- prising, in combination, a supporting-head, load-trays pivotally connected to the head, means for opening and closing the trays, including a line, and a guide for the line including a thimble mounted for rotary movement in the head, spaced upwardly presented plates fixed on the thimble, and a pair of grooved idlers 'ournaled to rotate between the plates and isposed obliquely one below the other, the peripheral portions of the idlers being so disposed that, for parts of their rotary travel, the peripheral portions of both idlers will rotate in the same horizontal plane relatively to the head and also in a plane approximately vertically in alinement with the bore of the thimble.

8. A bucket of the class described comprising, in combination with a line or cable, a supporting-head having an aperture for the line, a pair of spaced plates mounted upon the head at said aperture, and a pair of grooved idlers for the line journaled to rotate between the plates and disposed obliquely one above the other, the peripheral portions of both idlers rotating during a part of their travel in a plane approximately vertically in alinement with said aperture.

9. A bucket of the class described comprising, in combination with a line or cable, a supporting-head having an aperture for the line, a pair of spaced plates mounted for rotary movement as a unit upon the head at said aperture, and a pair of grooved idlers --for the line journaled to rotate between the plates and disposed obliquely one above the other, the peripheral portions of both idlers rotating during a part of their travel in a plane approximately vertically in alinement with said aperture.

.10. A bucket of the class described comprising, in combination with a two-part line or cable, asupporting-head having apertures for the line, a pair of spaced yoke-plates fixed at their ends to the head, said plates being located beneath, and extending longitudinally of, the head, and a pair of spaced sheaves journaled between the plates to take the bight of the line.

11. A bucket of the class described comprising, in combination with a two-part line or cable, a supporting-head having apertures for the line, a pair of spaced yokeplates fixed at their ends to the head, said plates being located beneath, and extending longitudinally of, the head, a pair of spaced sheaves journaled between the plates to take the bight of the line, and grooved idlers mounted upon the head for guiding the line in a straight path to and from the sheaves.

In testimony whereof, I have signed my name to this specification.

' LEMUEL J. HATT.

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