US1625960A - Material-handling device - Google Patents

Description

2 v April 6 w. s. RUSSELL MATERIAL HANDLING DEVICE Filed Jan. 4 1926 5 Sheets-Sheet' y1 April 26 1927. 1,625,96()

w. s. RUSSELL MATERIAL HANDLI NG DEVICE Filed Jan. 4 1926 5 Sheets-Sheet 2 E 2MP/ifa( Mal/m5505504 April 26, 1927.

w. s. RUSSELL,

MATERIAL HANDLING DEVICE 1927. April 26 w. s. RUSSELL MATERIAL `HANDLING DEVICE Filed Jan. 4 1925 5 Sheets--Sheet` 4 April 26, l1927.

w. s. RUSSELL MATERIAL HANDLING DEVICE 5 Sheets-Sheet 5 Filed Jan. 4 192s ,ZZ/Varney.

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Patented Apr. 26, 1927.

UNITED STATES PA'lEhl'l FFICE.

WALTER S. RUSSELL, OF LOS ANGELES, CALIFORNIA.

MATERIAL-HANDLING DEVICE.

Application led January This invention has to do generally with material handling devices, and is especially well adapted for embodiment in devices for handling sizable rocks, though in no way limited to such specic embodiment. In order that the nature and objects of the invention may be clearly pointed out, I have chosen to describe its embodiment in a device of this character, and from this description, those skilled in the art will readily understand how the invention may be embodied in devices having somewhatdifferent physical characteristics, especially when materials other than sizeable rocks are to be handled.

It will, therefore, be understood that the following description of the particular structure illustrated is not to be considered as in any way limitative on the invention considered in its broader aspects. For instance, I have shown one forni of the device mounted on trucks so it may be moved through a quarry cut as the quarrying operations progress; but it will be understood that it is not essential to the invention that the device in which it'is incorporated be of the mobile type.

In quarrying large rocks, great difficulty has been had in loading cars economically and expeditiously. This condition arises mainly as a consequence of the necessity for screening out smaller particles before the car is loaded and lfrom the destructive effect of chuting large rocks against the sides of the cars. Since it is essential that the finer material be screened out, the use of a steam shovel to load the cars directly is precluded, and consequently it is common practice to run a line of dump cars from the cut to a central handling plant where the screening and loading are accomplished. rlhis double handling is, ot course, an expensive procedure, and after the screening is finished, there still exists the necessity for chuting the larger rocks into the car. The consequent battering of the car sides is most destructive and it is not at all unusual to iind a car body wrecked after one or two loadings.

I overcome these objectionable features by providing a platform, preferably mounted on track guided trucks, upon which the material is directly dumped from the steam i vel., the being moved ferwardly 4, 192s. serial No. 79,062.

into the cut as the steam shovel advances. On the platform is a normally horizontal chute, preferably in the form of a heavy screen. For instance, it may include a bottom made up of a plurality of heavy grizzly bars. The finer particles pass through the grating whichis thereupon inclined to form a chute whereby the larger rocks are directed into the open side of a bucket by which delivery is made to the cars. As will hereinafter be made apparent, this bucket may move to a dumping position over the cars simultaneously with the inclination of the platform chute, or it may be moved independently thereof. In the first instance, the chute and bucketmay be hung upon a common horizontal pivotal axis; while in the second instance the bucket may move independently and vertically.

In both instances, dumping from the bucket is accomplished by opening 4bottom gates, and since the buckets, in dumping position, may be relatively close to the car bottom, when the gates are opened the rocks have but little fall. and therefore, the shock of their impact with the car bottom is so slight that no appreciable damage is done. In certain instances, it is even possible to lower the bucket until it engages or very nearly engages the car bottom. By then releasing the gate holding` means and subsequently raising the bucket, the rocks are, in effect, merely laid upon the car bottom. As the height of the rock deposit in the car increases, the bucket may be lowered to a lesser degree before it is dumped.

Other objects and novel features of the invention will be made apparent in the following detailed description wherein reference will be made to the accompanying drawings, in which:

Fig. l is an end elevation of one embodiment of the invention wherein the loading chute and bucket are adapted to move as one about a horizontal axis. The chute and bucket are shown in charge-receiving position;

Fig. 2 is a vi ew'similar to Fig. 1 but showing the chute and bucket in discharging position;

Fig. 3 is a plan view of Fig. 2;

Fig. 3L is an enlarged fragmentary section on line tirof Fig. 3;

Fig. 4i *L Iragmentary elevation of the device sa the right of Fish M Amade. through the quarry.

Fig. 5 is a section on line 5*-5 of Fig. 4;

Fig. (i is an enlarged detail, partly in elevation and partly in broken away section, of the bucket and mounting therefor;

Fig. is a fragmentary section on line 7 7 of Fig. 6;

Fig. 8 is a fragmentary section on line 8,-8 of Fig. 7; Y

Fig. 9 is a fragmentary section on line 9-9 of Fig. 6;

Fig. 10 shows a variational form of the device;

Fig. 10ZL is a conventional showing of a hoisting mechanism for operating the device shown in Fig. 10;

Fig. 11 is a fragmentary section on line -11-11 of Fig. 10; and

Fig. 12 is a view of Fig. 10 as viewed from the right thereof.

l lWill first describe that form of handling device which is of the mobile type, and in which the loading `platform or chute and bucket. move as one to and from discharge position; though it is to be particularly noted that the invention, considered in its broader aspects, is not limitedto a device having these particular characteristics. Numeral 10 designates generally a movable platform having Wheels 11' adapted to be guided by rails 12 which are laid in advance of the platform as the steam shovel (not shown) advances throughv the cut being Platform 10 has `a decl: 12% and an elevated supporting strueturc 14, the latter being held in vertical spaced relation with deck 13 by posts 15, suitable bracing 16 being provided. Rising from structure 111 is aI super-structure generally indicated at 17 and consisting of spaced vertical posts 18, cross beams 19 and 19", inclined braces 20 and horizontally extending cross braces 21 and 22, braces 22 extending forwardly beyond posts '18 as clearly shown in Figs. l, and l. A crown block or shcave .23 is mounted on header blocks 923 which are supported by upper beams 19 approximately midway between posts 1S.

Supportinv structure 1li; includes longitudinally extending sills and latere beams 25, said beams overluinging one side of the car as at 26. It is onthese overhanging portions 26 that posts 18 are supported. Diagonal tension rods Q7 tie posts 18 to the sup-- porting structure and diagonal tension rods 28 tie the overhanging portions of beams to the posts, attachment between rods 2S and beams being made by pins Q9. these pins projecting from the sides of the beams in a manner to form limit stops for the bucket, as Will be hereinafter described.

n. loading chut-e is indicated generally at 30. this chute being pivot-ed on a horizontal axis 31 which is supported by beams Q5 in a manner to be described later, but the chute is normally maintained in a' horizontal position during load receiving operations. It lies Within the scope of my invention to fashion this chute in any suitable manner, and it may or may not have the characteristics of a grizzly or grating. Preferably, however, it has these characteristics so that screeningmay be accomplished during the loading operation. As a preferred type of construction, chute 30 is made up of spaced horizontal channels 31"* and connecting H- heams 32. Also connecting channels o1 are Hbars 3S and Z-bars 34% upon which rest the spaced grizzly bars 35. Bars are held in pre-determined spaced relation by tubular spacers 36 which are carried around bars 3T, the latter being removably held to channels 31 by nuts 38. The forward ends of bars 5:35 may be notched as at 3E) (Fig. (l) so the upper edges of said bars lie Iiush with plate l0 which rests and extends between H-beams 3Q, 32", to form the bottom of bucket l, when the latter is in load-receiving position und one side of said bucket when in load delivering position. The ends zl1 of the bars entend beneath the flange of beam 32, but when it is desired to replace the grizzly bars to change the mesh of the grating or for purposes of repair, the grizzly bars may be readily removed by first withdrawing rods 3T and then nclining the bars so ends f11 may be Withdrawn from beneath the H-beam flange. Plates 12 extend upwardly from channels 31 to form the sides of the chute, While plates 48, braced by angle irons 4l. extend upward ly from said channels to form the sides of buckets B: it being noted that by this construction Vthe loading chute and bucket are rigidly interconnected by channels 31 and will, therefore, more as one when the device is being operated.

The chute and bucket are mounted for movement about the common horizontal pivotal axis provided by shaft which extends between boxes fflf on ovcrhangng portions 26 o li' beams 25. '.lhisshuft extends through plates stil and channels 31. and is preferably of square cross-section except, al its ends 47 nhere it entends outwardly beyond clmnnels 3l. The suuale portions ol the shalt pass through complrmientarily shaped oluruingr2 45 (Fig. 9.) in channels il. und plates lil ro the shaft and bucketrndchute assembly are held against relative rotation. Extensions ell" are of circular eroswsectior] and take the rigidly connected sheure fltl and have heal ing in boxes 4G. Connection livel-Ween plaie Al() and shaft l5 is preferably made through angle irons fill.

The side of the bucket oppoetc plate lll is closed by plate 50: the outer ends of said plate 50 and of plate 40 deliuiug discharge mouth 51. The bucket is open at the side opposite mouth 51 so when the chute and bucket are inclined. material from the chute slides into the bucket and against gates 32 which are pivotally movable to open and close mouth 51.

Gates 52 are arcuate plates, one of said plates having hinge connections 58 with a hinge pin 54 which extends between the ends of channels 31, and the other plate having hinge connections 55 with a hinge pin 56 extending between plates 43 at the opposite side of mouth 5l. Plates 52 have angle iron reinforcements 57, the outermost angle irons 57a carrying outwardly projecting studs 58. lllhen in closed position, plates 52 engage the forward edges of plates 43 and thereby close mouth 51.

Various means may be employed for controlling the movement of gates 52, but I prefer to employ the travelling block tackle and mechanism shown in. the drawings, special reference being made to Figs. 6 and 7. The same type of control mechanism is used at each side of the bucket, and I will, therefore, describe only that at one side. Links 59 pivotally` connect studs 58 and shaft 60 upon which shaft is mounted travelling block 6l. One end of dump-oontrol. cable 62 is anchored to shaft 60 at 68, the cable being trained about sheave 64, then about block 6l and back to sheave 65. Sheaves 64 and 65 are carried on shaft 66 which is supported between platet?) and yoke 67, the latter being secured to plate 43 by rivets 68 and definitely spaced from said plate by bolts 69 and tubular spacers 70.

Cable 62 runs from sheave 65 to sheave 4S, it being noted that since sheave i8 is on the pivotal axis of the bucket, pivotal movement of said bucket in no way effects the tensionof the cable. From sheave 48, cable 62 is trained over cross sheaves 71 and 72 on shafts 73 and 74, respectively. The last named shafts are supported from structure l-t in any suitable way (see Fig. l). Cable 62 runs from sheave 72 to drum 75 of hoist H which is here shown conventionally since it may be of any suitable type. A cable 62 loads from drum 7 5 to the dump control mechanism on the opposite side of the bucket, in a manner similar to that described in connection with cable 62.

Assuming that the bucket is in the inclined position of Fig. 2, and gates 52 are closed, it will be seen that material in the bucket as well as the weight of the gates tends lo swing said gates open to dotted line position. This opening movement is, how.- ever, resisted by holding cable 62 from movement so block 6l and hence links 59 and gates 52 are held from dropping. The cable is thus releasably held by application of usual brakes (conventionally shown at 75) to brake drum 75a.

By releasing said drum 75 from the effect of its brake, gates 52 are left free to gravitate to dotted line position, links 59 spreading angularly and blocks 61 lowering in the 1u anner clearly shown. rIhe rapidity of this nuiivement may be controlled, of course, by proper manipulation of the drum brake. lWhen gates 52 are thus opened, mate-rial within the bucket is discharged into railroad car C, the degree of inclination of the chute 3l existing at the time oit` dumping and the extent -ot gate opening depending upon the particular situation existing during the .operation. The size of the load, thc relative size of the rocks making up the load, the height of the bucket above the car bottom or material already disposed upon said bottom are some of the controlling factors in determining the relative time and Aextent of gate opening. Of course, in any event, the chute is always inclined sufficiently beyond the angle of repose of the particular material being handled, to insure that said material will slide from the chute into the bucket so it may be deposited in car C when the gates are opened. In some situations it may be desirable to start opening the bucket while the chute is still mounted upwardly; and in other situations, it is desirable that the bucket be not fully opened until the chute starts its movement back to horizontal position. Conditions und-er which such relative movements are advisable will bek well understood by those skilled in the art.

When the bucket is to be closed, cables 62 and 62n are taken up by rotation of drum 75 through the medium of the conventionally illustrated engine designated at E; this taking up of the cables moving blocks 6l towards sheaves 64 and 65, thereby reducing the angle between links 59 and hence drawing the free ends of gates 52 together to closing mouth 5l. This closing movement of the gates may occur with either the bucket at rest or during its pivotal movement in one direction or the other.

I will now describe the preferred method of inclining the bucket and chute and for returning them to normal or horizontal position. While any suitable tilting and return mechanism may be employed, or while I may even depend upon gravity for causing pivotal movement in either one direction or the other` the preferred method of pivotally .moving the chute and bucket that shown iu the drawings. At this time it may be well to note that it is desirable and usually necessary (in the absence of other anchoring` means) to provide ballast boxes S at that side of the car which is remote from the bucket; the ballast boxes being loaded down with suilicient weigl'it to insure that the loading car is not over balanced at any stage of the operation.

F or moving the chute and bucket to discharge position, I provide chute 30 with a bridle 77, the free ends of which are pivotally connected with channels 3l at 78, while its closed end carries sheave'79. A

hoisting cable is anchored to bridle 77 at 81, and is trained around sheave 82 which 1s pivotally connected to the shaft 23h of the crown block 23 by links 83. From the sheave 82 cable 83 is brought around sheave 79 and then carried over crown block 23 from whence it passes over sheaves 84 and 85 to drum 86 of hoist I-I, said drum being provided with the usual brake drum 87 and braking mechanism of usual type conventionally illustrated at 87a.

Sheave 8a is supported on hangers 88 which depend from beam 19u; while sheave is mounted on a diagonal piece 89 which extends from beam 22 to beam 21 of the super-structure.

VVhile-separate hoist and return cables may be used for pivotally moving the loading chute in opposite directions, and while these cables may be operated by independent mechanisms, I prefer to utilize a single cable and drum for this purpose. However. I will refer to that portion oi the single cable which is operated to lower the chute, as a return cable. Thus, after cable 80 is coiled about drum 8G, it is taken ofi at 91 and carried over horizontally arranged sheafve 92, the latter being supported on deck 13 as clearly shown in Fig. 2.

Portion or length 91 will hereinafter be referred to as a `return cable so it may be more readily distinguished from that portion of the cable which is operated to raise the chute,.though, as mentioned above, length 91 ishere shown as a continuation of ca'ble 80. From sheave 92 cable 91 passes over sheave 93 which is mount-ed on brace 94ea of supporting structure 14. A sheave 911 is pivotally connected to shaft 95 of sheavc 93 by links 96; while a sheave 97 is secured to the under side oi chute 30, approximately midway between channels 31a, by links 98. Fable. 91 passes :trom sheave 93 over sheaves 97 and 94, its free end being;1 anchored to links 98 at 99. 1Where the hoisting and return cables are operated from a common drum, it is necessary, of course, that the blocks o1 the tackle on the hoistingand return side be of such ratio that they pay out and take up equally when the common drum is revolved in either direction.

VIt will be understood without further discussion how rotation oi drum 86 in opposite direction will positively raise and lower the chute and bucket, the movement of said chute and bucket being constantly under the control of the operator irrcspiu'tiver oi the weight of the load on the chute or in the bucket.

In order that the strain may be laken oil' of the tackle when the bucket is in the upright, discharging position ot Fig. 2, I prefer .to provide arms 100 on the sides of bucket 13, attachment of these arms being conveniently made by applying them to bracketor yokes G7 and securing them in position by means of bolts 69. Arms 100 are adapted to engage stop pins 29 `to limit the pivotal movement of the chute and bucket in one direction, and I may provide said arms with hook ends 101 so when pins 29 are engaged, the horizontal overhauging portions 'of the hook ends engage the pins 29 so the down-bearing load of the bucket will be taken, in part, by these pins and transmitted to the super-structure, rather than being im posed solely on the return or holding tackle and shaft 4:5.

In order to carry away and properly dispose oi' the screenings which pass between `grizzly bars 3:3, I may dispose a belt con veyor 102 beneath said ba'rs. An inclined conveyor 103 is adapted to take the material trom conveyor 102 and deliver it outside the car. Conveyors 102 and 103 may be driven from any suitable mechanism, for instance, power shaft 1011 may be operatively connected at 105 and 10G to conveyors 102 and 103 respectively, shaft 101. in turn, being driven directly from any suitable independent prime mover (not shown) or operatively connected to the power plant of the hoisting mechanism at 107.

I will now describe the variational type of loading,I device shown in Figs. 10, 11 and 12; wherein the bucket and chute are independently movable; the chute being adapt ed to be moved pivotally about a horizontal anis and the bucket being adapted to be re ciprocated vertically. In Figs. 10 and 12 I have shown a tower 'frame consisting of in clined uprights 110, cross braces 111 and headers 112, 113, 1141 and `115. Loading platform P rests upon cross pieces which are secured to uprights 110, and extends as at 117 partly into the tower. Dropped Yfrom the end of extension 117 is an apron 118 which is supported at its lower end by 111ember 119 on bra'ces 120 extendinglr between two ot' the ulin'ights 110. During certain stages of the operation, apronV 118 "forms a closure ttor the otherwise open side of bucket B'.

Chute 121 may be 'fashioned in much the same manner as chulo 30. except that it is movable independently of bucket ll. (lhute 121 may have a grating or grizzly ba'r bottoni 122. as indicated in Fie. 12. and is pivoted at 12,3 onblock 1211 at the end ot' extensions 117. Normally, chulo 121 is in the. horizontal positimi indica tod by dotted lines, its rearward end resting on block which extends upwardly from platform l. The chute may be loaded directly from a steam shovel oi' from a second chute 120 supported above platform P by structure 12T. The forward end of chute 121 opens into bucket B through open side 128 thereof', so when the chute is raised to the full line position shown in Fig. 10, material within the chute will slide into said bucket, the bucket ordinarily,

lll() though not necessarily, being in the raised position indicated by full lines in Fig. 10 when the material is thus delivered to it.

While it lies within the scope of my invention to move chute 121 pivotally from horizontal to inclined position with any suitable mechanism, I prefer to utilize the tackle here illustrated and including a bridle pivotally secured to the chute at- 131 and carrying link 132 which supports sheave 133. A grizzly-hoist cable 134 is anchored to link 132 at 135, and is trained around crown sheave 136, around sheave 133, and over crown sheaves 137 and 138 to sheave 139 at the base of the tower. From sheave 139 cable 134 leads to drum 140 of the hoisting engine conventionally illustrated at H. 141 designates the power shaft of this engine, which shaft is adapted selectively to drive drums 142 and 143, as well as drum 140. Suitable clutches 144, which are shown conventionally since they are well known to those skilled in the art, provide means' whereby the drums may be driven simultaneously or independently, and each of the drums has a usual brake band 145 to which ordinary braking mechanism, indicated at 1452*, may be applied in the usual manner for retarding or stopping rotation of the drums.

Secured to braces` 111 of the tower frame are vertical posts 146 which serve to guide bucket B throughout all periods of its vertical movement. Bucket B is substantially rectangular in horizontal cross section, being open at one side 128 for the reception of ma terial from chute 121, and the nose 147 of the chute is preferably adapted to extend through this open side in orderto yprevent spillage of material between 'the chute and bucket. The bucket may also have an outwardly turned lip 148 which is disposed at side 128 below nose 147 and extends into proximity with apron 118 to prevent material within the bucket from spilling out the open side of the bucket and downwardly along apron 118 as the bucket is lowered. vertically spaced channels 149 are secured to both sides of bucket B and extend there beyond into facial engagement'with posts 146` the channels being adapted to engage said posts slidingly as the bucket is reciprocated vertically and thus serving to hold the bucket from swinging to right or left, as viewed in Fig. 12. Angle irons 150 are secured to the inner faces of channels 149, and slidingly engage the opposed inner faces of posts 146 as the bucket is reciprocated, thus serving to hold the bucket from swing ing to left or right as viewed in Fig. 10.

Gates 151 are hinged at 152 to the side plates of the bucket, and when closed, are inclined as shown in Fig. 10 to form a hopper .bottom for the bucket.

The bucket is lowered and raised by cable 153 which is secured at 154 to a bridle 155 extending upwardly from bucket B. This bridle also carries a sheave 156. Cable 153 runs from bridle 155 over crown block 157, thence around sheave 156, and then over crown sheave 158 to drum 142.

Pivotally connected to the lower ends of gates 151 are links 159, the opposite ends of said links being pivotally connected at 160 to the shaft 161 carrying a. sheave 162. It will be understood the gate actuating mechanism is duplicated at the opposite side of the bucket, but since the two mechanisms and tackle for controlling the saine are identical, I will describe but one in detail. Dump control cable 163 is anchored at 164 on yoke 165 carried by shaft 161, and passes thence over crown sheave 166, around sheave 162 and over crown sheave 167 to drum 143. Cable 163', from the opposite gate actuating mechanism, is trained in the same manner over corresponding sheaves and passes to drum 143.

After chute 121 has been inclined to empty its contents into bucket B, cables 153, 163 and 163 are paid outequally by coincident rotation of drums 142 and 143, tension being maintained on cables 163, 163', in order to maintain gates 151 in closed position. As soon as the bucket is lowered `to dumping position, and this position will be determined by the size of the load, height of the floor of railroad car R, etc., drum 143 is rotated independent-ly of drum 142 in a manner to pay out cables 163 and 163. This results in allowing the load within bucket B, as well as the weight of gates 151, to swing the gates downwardly, and thereby open the lower end of the bucket so the load may be deposited in car R.

lVhen the gates are to be closed, drum 143 is rotated to take up cables 163 and 163 which raises sheave 162 and links 159 in a manner to swing gates 151 inwardly and back to the full line position of Fig. 10. Assuming that the bucket has not been raised during the closing movement of the gates, as soon as the gates are closed and the bucket is raised by rotation of drum 142, coincident and equal rotation of drum 143 is necessary in order that slack may not develop in the dump control cables and thereby allow the gates to reopen unintentionally. Of course, by rotating drum 143 faster than drum 142, the gates may be closed during the ascension of the bucket; or, if desired, the bucket may be raised to load-receiving position before the gates are closed, but in this latter event, slack will develop in the dump control cables unless drum 145 is rotated coincidently and equally. It then requires independent taking-up of cables 163, 163 to close the gates.

It will be understood the drawings and description are to be considered merely as CII illustrative of and not restrictive on the broader claims appended hereto, for various changes in design, structure and arrangement may be made without departing from the spirit and scope ot said claims.

I claim: A

1. In a device of the character described, a dump bucket having a downwardly opening discharge mouth, a pair oi' closure gates hingedly connected to the bucket adjacent the mouth, and releasable means adapted to hold said gates closed; said means including a pair 0'1": links pivotally connected to one another at their upper ends and pivotally connected at their lower ends, oneto each of said gates, a travelling sheave at the pivotal connection between links, a sheave, stationarily mounted, except for rotation, on the bucket, a cable trained over said sheaves, and means for operating said cable to vary the distance between said sheaves and hold them at adjusted position thereby to vary the angular disposition of the links and hold them in adjusted relative angular position, respectively.

Q. In a device oi' the character described, a supporting frame, a dump bucket open at one side, a loading chute rigid with said bucket and opening into the bucket at said open side, said bucket and chute being mounted on the frame for pivotal movement about a horizontal anis and the chute being normally supported in horizontal position Yto receive its load, means for inclining the chute to cause it to deliver its load `to the bucket through said open side; said bucket having a discharge mouth which opens downwardly when the chute islso inclined, downwardly opening gates foi-the discharge mouth, and releasable means adapted to hold said gates closed.

3. In a device of theA character described, a supporting frame, a dump bucket open-at one side, a loading chute rigid with said bucket and opening into the bucket at said open side, said bucket and chute being mountedon the trarne for pivotal movement about a horizontal anis and the chute being normally supported in horizontal position to receive its load, means for inclining' the chute to cause it to deliver its load to the bucket through said open side, means `on the frame and bucket adapted to `coac't to limit the degree of inclination of the chute; said bucket having discharge mouth which opens downwardly when the chute is so inclined, downwardly opening' gates for the discharge mouth, and releasable means adapted to hold said gates closed.

4. In a device of the character described, a supporti-ng trame, a dump bucket open at one side, a loading chute rigid with said bucket and opening into the bucket at said open side, a screen bottom in said chute, said bucket and chute being mounted on the frame for pivotal movement about a horizontal axis and the chute being normally supported in horizontal position to receive its load, `means for incliniug the chute to cause it to deliver its load to the bucket through said open side; said bucket having a discharge mouth which opens downwardly when the chute is so inclined, downwardly openinr gates i'or the discharge mouth, and releasable means adapted to hold said gates closed.

5. In a device of the character described, a supporting trame, a dump bucket associated with the trame, a pair of closure gates hingedly connected to the bucket, means for selectively moving said gates hin( cdly und holding them against movement iiugedly; said means `includiiig a pair of links pivotally connected to one another atone end and pivotally connected at their other ends, one to each of said gates, a sheave connected to the links at a point spaced from their counection with the gates, a secondsheave assi ciated with the first sheave, said sheaves beingcapable of relative bodily moveuxent, a cable trained over the sheaves, and means for operating said cable to move the sheaves bodily toward and away from each other and hold them at positions to which they have been moved thereby to vary the angu lar disposition of the links and hold them in adjusted relative position, respectively.

G. In a device oi the 'character described, a supporting frame, a dump bucket open at oneside, a loading chute rigid with said bucket and opening into the bucket at said open side, said bucket and chute being mounted on the frame for pivotal movement about a horizontal airis and the chute being normally supported in horizontal position to receive its load, means tor inclining the chute to cause it to deliver its load to the bucket through said open side; said bucket having a discharge mouth which opens downwardly when the chute is so inclined, a pair of gates for the discharge mouth and hingedly connected to the bucket, means for selectively moving said gates hingedly and holding them against movement hingedly; said means including a pair of links pivotally connected to one another at one end and pivotally connected at their other ends, one to each or said gates, a sheave connected to the links at a point spaced from their con; nection with the gates, a second sheave associated with the first sheave, said sheavesbeing capable ot1 relative bodily movement, a cable trained over the sheaves, and means for operating said cable to move the sheaves bodily toward and away from each other and hold them at positions to which they have been moved thereby to vary the angular disposition of the links and hold them in adjusted relative position, respectively.

7. In a device orf the character described,

a supporting frame, a dump bucket open at one side, a loading chute rigid with said bucket and openinginto the bucket at said open side, said bucket and chute being mounted on the trame tor pivotal movement about a horizontal axis and the chute being normally supported in horizontal position to receive its load, means tor inclining the chute to cause it to deliv-er its load to the bucket through said open side, said bucket having a discharge mouth which opens downwardly when the chute is so inclined, a pair oi' closure gates hingedly connected to the bucket adjacent the mouth, and releasable means adapted to hold said gates closed; said means including a pair of links pivotally connected to one another at their upper ends and pivotally connected at their lower ends, one at each ot said gates, a travelling sheave at the pivotal connection between links, a sheave, stationarily mounted, except for rotation, on the bucket, a cable traine-d over said sheaves, and means for operating said cable to vary the distance between said sheaves and hold them at adjusted position thereby to vary the angular disposition of the links and hold them in adjusted relative angular position, respectively.

8. In a 'device of the character described, a supporting trame, a dump bucket open at one side, a loading chute rigid with said bucket and opening into the bucket at said open side, said bucket and chute being mounted on the frame tor pivotal movement about a horizontal axis and the chute being normally supported in horizontal position to receive its load, means for inclining the chute to cause it to ydeliver its load to the bucket through said open side; said bucket having a discharge mouth which opens downwardly when the chute is so inclined, gates for the discharge mouth, and releasable means adapted to hold said gates closed.

9. In a device of the character described,

a supporting frame, a dump bucket open at one side, a loading chute rigid with said bucket and opening into the bucket at said open side, said bucket and chute being mounted on the frame tor pivotal movement about a horizont-al axis and the chute being normally supported in horizontal position to receive its load, means for inclining the chute to cause it to vdeliver its load to the bucket through said open side, means on the trame and bucket adapted to coact to limit the degree ct inclination of the chute; said bucket having a discharge mouth which opens downwardly when the chute is so inclined, gates for the discharge mouth, and releasable means adapted to hold said gates closed.

l0. In a device of the character described, a supporting rame,a dump bucket open at one side, a loading chute rigid with said bucket and opening into the bucket at said open side, said bucket and chute being mounted on the frame for pivotal movement about a horizontal axis and the chute being normally supported in horizontal position to receive its load, means for inclining the chute to cause it to deliver its load to the bucket through said open side; said bucket having a discharge mouth which opens downwardly when the chute is so inclined, a pair of gates for the discharge mouth and hingedly connected to the bucket, means for selectively moving said gates hingedly and holding them against movement hingedly; said means including a pair of links pivotally connected to one another at one end and pivotally connected at their other ends, one to each of said gates, and means applied to the links at their pivotal connection with one another and adapted both to move said links relatively to vary their angularity and to hold said links Vfrom relative angular' movement.

WALTER S. RUSSELL.

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