US2606063A - Loading machine - Google Patents

Description

g- 1952 J. L. CLARKSON ET AL 2,606,063

LOADING MACHINE- 5 Sheets-Sheet 1 Original Filed Aug. 2, 1940 NVENTO i JOHN 1.. CLARKSON, ALL TOIY BJncKSoN BYM W Aug. 5, 1952 J. CLARKSON ET AL LOADING MACHINE 5 Sheets-Sheet 2 Original Filed Aug. 2, 1940 JOHN ACLHRKSON, ALLTON aJacnsov YM v W HT-TORNE'YS Aug. 5, 1952 J. L. cLARKsoN ET AL 2,606,063

' LOADING MACHINE Original Filed Aug. 2, 1940 5 Sheets-Sheet 5 Fl G5.

I/vve/vmns J HN L. OLARKSON. H'LLTON B. JACK50N ATTORNEYS Aug. 5, 1952 J. L. CLARKSON ET AL 2,606,063

LOADING MACHINE II n u u H w I A TTORNEKS Aug. 5, 1952 J. L. CLARKSON EI'AL LOADING MACHINE 5 Sheets-Sheet 5 Original Filed Aug. 2, 1940 I NVENTORS. 'JOHN L. CLnRnsoN, ALLTON B. JAG BYM HSON ArTo

Patented Aug. 5, 1952 LOADING MACHINE John L. Clarkson and Allton B.Jackson, Nash-- ville, Ill., assignors to Clarkson Manufacturing Company, Nashville, 111., a corporation of Illinois I Continuation of application Serial No. 349,488, August 2, 1940. This application January '7, r

1944, Serial ,No. 517,295

8 Claims. 1

This application is a continuation of application Serial No. 349,488, filed August 2, 1940, and now abandoned, as to subject matter common to the application. '7

This invention relates to gathering and loading machines, more particularly of the low-headroom type designed for use in coal mines for gathering coal from the face being worked and forloading the same on mine cars.

Many mines are of economic importance even if the veins are low-some of such veins are as low as thirty-six inches. Difiiculties are encountered in operating while not only gathering but also while loading the material in a car under such low-head-room conditions. In some cases timbers still further reduce the headroom. In many mines the veins are not level but up and down so as to require the machine to move'uphill and downhill. Under such conditions, therefore, the gathering loader must not only be articulated to operate under. such conditions, but must be capable .of frequent adjustments and adaptation to such conditions.

7 One of the objects of this invention, therefore, is to provide a gathering loader which will operate in such a low vein and under the conditions described, but which Will have ample power to handle a large tonnage. i

Another object is to provide such a gathering loader structure which will be flexible so as to be able to gather and convey the material under the varying conditions described and from any point over a wide space, and to deliver the same to cars positioned in various ways with reference to the loading machine.

Further objects will appear from the following description taken in connection with the accompanying drawings, in which:

Figure l is a plan view partly in section of the forward end of a gathering and loading machine embodying this invention, the machine,'as shown being of the Caterpillar type;

Figure 2 is a side elevation of Figure 1;

Figure 2a is a detail illustrating the operation of the lump-breaking device;

Figure 3 is a plan view. partly in section of the rear end of the machine;

Figure 4 is a side elevation of Figure 3;

Figure 5 is an enlarged side view partly in section showing the drivingconnections for the forward conveyor; Figure 6 is an enlarged detail of Figure 3 with portionsin section; Figure '7 is an enlarged sectional detail of Figure 4';,and v "Figure 8 is a sectional detail of a part of Fi ure '7 illustrating another embodiment of the invention. c t

Figure 9 is an elevation somewhat diagrammatical in form, of a complete gathering and loading machine, the machine, as shown, being of the track typei Figure 10 is a view somewhat diagrammatical in form showing the'conditions encountered when the machine 'moves .uphill; Figure 11 is a similar view showing a'vein dipping downhill. 1

Figure 12 is a viewsomewhat diagrammatical in form, showing various conditions under which the machine operates; and

Figure 13 is a similar view showing another condition.

Generally stated, and-in accordance with an illustrative embodiment of this invention, the gathering loader comprises a locomotive. carriage, which in the particular embodiment is low, for propelling the entire gathering-loader organization and power operated means is connected for driving the various parts of the gathering and loading mechanisms. This carriage may be of any suitable type, examples of which are Caterpillar; and track types. Materialgathering and conveying means is mounted on this carriage to extend forwardly at a low incline and this means is adapted toactivelyengage and gather coal encounteredat the front end of the loader, i. e., from the floor of the vein and even from the face thereof, and convey the same upwardly and rearwardly and to deliver .the material onto a loading conveyor structure. This latter extends rearwardly over, close to, arid-b eyond the carriage to deliver the material so re ceived at the rear thereof. The loading conveyor structure has a section which is pivoted at its front end and adjacent the rear end of the elevating conveyor to swing vertically with reference to the carriage, and has a terminal section which is pivotedat its front end adjacent the rear end of the first-named section to swing verticallywith respect thereto intov and out of the plane thereof-and with reference to the carriage. These sections ofthe loading conveyor structure are so mounted, constructed and arranged, when so swung, to clear the carriage and the ceiling of a mine in which the gathering loader operates. A stationary or jfixed section, iorminga hopper, may be provided between the first-named section of the loading [conveyor structure and the elevating conveyor. 'Poweroperated means is provided adapted, during the operation of the loading conveyor, to swing the is also mounted to swing horizontally, and

power-operated means may also be provided for effecting such horizontal movement. The loa d-- ing conveyor structure has conveying inean's,

such as flights, and this means may comprise a flight assembly which may egitend from. the front of the loading conveyor structure to the rearend of the terminal section. This flight assembly may be flexible, even universally, so as to fiery:

laterally in accordance with the horizontal 'ad-u justments, as well as with vertical adjustments, of the movable sections of the loading conveyor structure. The material-gathering means may be swiveled on the carriage to swing horizontally as well as to swing vertically, and the iixed section may be mounted above the swivel.

Referrin now o the. d aw n siend m re pe tieuierly to ne re's'lh maeb oefls e for illustration comprises a locornotifve carriage, indicated generally at I. Extending forwardly from the carriage, at a low level at the ground is a long supporting bracket 2 which carries the forward conveyor structure indicated generally at 3 and including at its forward end gathering means including a pair of gathering chai s 4 equ ppe with gathering arms or Pi s 5. The atherin dev ce are edar eo o ga h r the material at the front ofthe 'I'nachine from the face of the vein and after passing the same over the shoe 6, to deliver the material to an elevatin convey Tn selevatin Q Q QYQI ceives the. material from the gathering mean and it extends partly over the carriage to de} liver it to aconveyor' structure for loading The elevating conveyor 1 terminates at its end at s over the forwa d end o a del ve y or oa ing conveyor, indicatedg'enerally at It, so'that the latter receives the material from the former. The conveyor structurelll entends rearwardly v r n be o d theearriese. I} an I se ed- A st ionary ect o 9 x on the bracket 2 so, as to provide aihop'perr' A section II is pivoted at its fronte'nd at l2 adjoining the stationary sections and adjacent the elevating conveyor for vertical swinging movement with respect to the carriage and the stationary section. The terminal section [3 is jointed to the section for both vertical and horizontal movements with "respect-thereto and with reference to the carriage, and the terminal section I3 is movable into and out of the plane of the section II I In Figures 1 to 8, inclusive, the machine is provided with Caterpillar treads and allof the mechanism is mountedfonthe' carriage. In Figures 9 to 13 the carriage'is of the track type provided with driving wheels I moving on a track llll. The structures may, however, be otherwise similar so that further detailed de-' scription is therefore unnecessary.

The forward conveyor '3 is mounted on'the bracket 2 for both vertical and horizontal swinging movements in order that itsfront end may be moved to any position, relative to the carriage I, so that material may be gathered from any point. In order to provide for such vertical and horizontal movement, and, at the same time, to keep the machine low enough to operate in such a low vein as above mentioned, the following structure is provided:

The bracket 2 may be in the form of a casting and is provided with an upper portion H (Figure 5) and a lower portion l5.v These two portions are spaced apart so 'as to receive upper and lower bearing members l6 and Il, respectively. These members may be secured to the bracket 2 in any suitable manner as by bolts l8 and I9, shown in Figure 5. The bearing members f6 and IT provide respectively upper and lower swivel bearings for a swinging bracket 20.

' This bracket has aswivel bearing on the members l6 and2l and on the member I! at 22. The swinging bracket may be provided with rollers 23, arranged.- to roll upon a rail 24 extending circularly around the forward end of the bracket 2. The'swinging'bracket 20 has the duty of carrying the weight of the front conveyor 3 and of providing a swinging pivot therefor. It thus ro des, v rti ll -s a s i l b ar n o on 2| n t e h w t h season n a l 24 90 wh ch e. br ck 911 rom. one angular position to another. The ijxed or ti y ec i 9! th l a in qvnveyor stru e is s mounte above. h swive or the ga n n co y n ructure- A h ad bracket 5 fo he eoneyo 8 s fire 7 29 e swinging et 2. Th to jon evor win i i t u on h bracket 2 at Z? or ver n i mo me t:

In or r to dri e the ront o erqrvt e ays c nnec ion ill s rates!!! sect n n F ure 5 e Pro i ed- 4. rivin moto not new. the d aw n is mou ted' nqn he. carriag and nne ted s wi l newbie. de qr b st. a d ive onve 1- e The same mot ma a so, 1! i n rega e more! th carr age t h m t q n eote by n suit ble d v in connect ons, not. hown. to drive a ve ica sha 3 uita l ioumalled n 2 b a ket; A gear 32 n he ha t 3. dr v le sea 33, which in turn drives a gear. on a shaft 35. The a t 35 is iournelled th bea ng memb r I6 and l-j Acco dingly. the ears! 70- t e on he ame a is on whi h, the sw ng b ck t i o sy t i a ran ment the drive is carried through the gear 34 to the con-1 veyor l and the gathering devices, in any position of the bracket 20. Meshing with the gear- 3,4 is another idlergear 31;. which drives a gear 31, on a vertical shaft 38 journalled in the. for-.. ward end of the bracket 20. Theshaft 38 car; ries a bevel gear. 39 meshing with a correspond-. ing gear 40 carried by a horizontal shaft H journalled in the bracket 25'. The, shaft 4 carries a sprocket 42 connected by a chain {3 to a similar sprocket 44 on.t he. pivot shaft is. which drives the elevating conveyor 1.. This drive may be carried out by means of a sprocket 45 on the shaft 26 and a -chainlli. passing over. suitable guide sprockets to a sprocket on acrossshaft 48 extending across the. conveyor boom 3. The shaft 48 carries t end' thereof a sprocket 49, and these sprockets are oonnected by. chains 50 to sprockets 51- on shafts 52 which drive the gathering devices 4,, 5.. This drive for. the gathering devices may he. similar to that described in Patent No. 1,9 Q5i,3 5 5. issued to John L- a kson on Apri v 8. 1933. In o er to. filevate the boom 3 of the front. conveyor. a pair ot hydraulic jacks 53. is provided. one on each sid e of the boom 3. Each of these jacks is pivoted at 54 to an ear 55 on the bracket 20, At its forward end the jack ispivoted. at 56, to a member 51 pivoted on the boom 3. A suitable hydraulic pump, fcirculating a pressure fluid such as oil, maybe connected to supply the jacks 53. As these hydraulic connections may be of any suitable type well known in the art, they are not illustrated in the drawing. In order to swing the boom 3. laterally in its swivel bearings 2| and 22, cables 58 (Figure 5) are provided, passing in opposite directions around a curved flange 59 on the bracket and lying in grooves 60 in said flange, and anchored in ears 6| on said bracket 20. The other ends of these cables, after passing over suitable guide pulleys, are connected to hydraulic jacks operable to haul in on one cablewhile paying out the other so as to swing the boom. As this mechanism is not a part of the present invention, it is not shown in complete detail in the drawing.

The gathering mechanism, illustrated at 4 and 5, may be similar-to that described in the above mentioned patent. This comprises a pair of chains 4 passing over upper and lower sprockets 62 .and 63, respectively, so that the gathering arms or picks 5 move in orbital paths. This movement is inward toward the middle of the conveyor at the lower end of such path, then upward along the conveyor, and then around the upper sprocket 62 to the return path. As the picks 5 move outwardly away from the elevating conveyor 1 in turning about the upper sprocket 62, their'points may undergo a sudden increase in velocity; that is, as the picks move upwardly along the inner; straight portion of their paths along the conveyor, they travel at a speed preferably a little slower than that of the conveyor 1. As they turn outwardly around the sprocket 62, the chain continues to travel at the same linear velocity. However, the picks extend outwardly from the, chain and their tips may move at a radius equal to double or more that of the sprocket. Accordingly, during this portion of their movement the tips of the picks whip around this sprocket at a high velocity. If a pick happens'tohave a lump of material lodged thereagainst during its upward travel, it sometimes happens that the lump does not fall back on the conveyor 1 but is retained in the embrace of the pick until the latter moves around the sprocket 62. When this happens, there is a likelihood that the sudden increase in speed will cause the pick to'throw the lump of material off the conveyor, sometimes with great force. This is often dangerous to the operator. In order to avoid this action, there is provided adjacent the path of the pick where it passes around the sprocket 62 a deflecting or breaking element 63 (Figure 2a). This may be in the form of a rib or fin, as shown in Figures 1, 2, and 2a. In the arrangement illustrated in Figures 1 and 2 it is formed as a continuation of the upper rim flange 64 of the conveyor. It is preferably shaped so as to tend to deflect material carried around by the pick 5 back onto the conveyor. As shown in Figure 2a, it is shaped so that the pick 5 may just clear the'edge of the element 63 so that when a lump of material, indicated by dotted lines in Figure 2a, is carried around to this point by the pick, such lump will engage the element 63 and will either be deflected so as to fall back'on the conveyor, or will be crushed or broken by the mutual action of the elements 5 and 63. This tends to avoid throwing large lumps of material off the conveyor.

The loading conveyor (Figure. 2) is arranged in three sections. The front section'9jasshown;

is fixed. on the bracket 2,as" already pointed out, and has pivotedtheretoat I2 the section I l;. and the terminal section [3 ishinged to the section I l at 13'. 'In order to provide for both horizontal and vertical swinging movement of the section I3 (Figure lithe structure shown in Figures 3to' '8, inclusive is provided. The section I icarries a bracket 65 (Figure 7) having a pivot bearing 66 adapted to receive a pivot pin 61. Swivelled on the pin 61 is a bracket 68, which has secured thereto a member 69 which extends forwardly of the'pin B1 and terminates at its forward end in an arcuate edge Illwhich lies flush with the floor of the sectionll adjacent a concave arcuate edge 1| on said floor. The arcs of the edges 10 and-H are concentric with the pin 61, so that as the member 69 swivels'on said pin it provides a substantially continuous'floor for the conveyor. The member 69 is provided with pivot bearings 12, to' which the section 13 is pivoted by meansof short pivot pins 13. Thus, the pin 61- provides a swivel connection for swinging the section l3 horizontally, while the pivots 13 provide a hinged joint for swinging said after section l3 vertically.

The rear end of the section I l is supported by a hoisting device, shown in the form of a hydraulic cylinder [4 (Figure 8). The extensible upper end of this device is pivotedat 'l5 to'ears '16 on the lower portion of the bracket 63. The lower part of the cylinder I4 is provided with trunnions 11 which'rest in sockets 18 in a movable bracket 19, swivelled on a pin 'which-is concentric with the pin 67. The bracket'liland' the pin 80 are carried by a rearwardly-extending supporting bracket 8| on the carriage l. The bracket 19, in addition to being swivelled on the pin 80, may be provided with rollers 82 adapted to run on a circular track 83 on the bracket 8|. The latter bracket is provided with an arcuate opening 84, through which the lower end of the cylinder 14 extends in order to permit the swinging movement of said cylinder about the pin 80. The pivots l5 and 11 take care of variation in the position of the cylinder 14 as the same is extended to elevate the section I I, as shown in dotted lines in Figure 7 As the swivelled member 686'9 turns about the pin 61, the bracket 19, which carries the weight thereof, follows such movement by also swivelling about the pin 80.

In order to take care of the vertical-swinging movement of the section l3, the bracket 68 is provided with ears 85' upon which are pivoted hydraulic cylinders 86, whose other ends are similarly pivoted at 8! to the section l3.

The lateral swinging movement of the section I3 is accomplished by means of a pair of hydraulic jacks (see Figures 6 and '7) one on each side of the pivot pin 61. Each of these jacks is mounted by means of trunnions 96, engaging sockets 91 in the bracket 68 of the swivelled memher. The other end of each of these jacks is pivoted at98 to suitable ears 99 on the bracket 65. These jacks are operated in opposite directions, i. e., one is retracted while the other is ex- .tended, in order to swing the after section to one side or the other.

A suitable hydraulic pump and a suitable system of piping for the pressure fluid, together with suitable control valves for operating the several jacksin the desired manner, are provided. These have not been illustrated, however, as they may be of any suitable construction, well known in the art. V The conveyor chain which forms the moving elementof the loading conveyor, comprising the section 9, 1H,. and 413', may; be of the single :.chain type, comprising. a chain: 88,.which is universal-- ly flexible, that is, flexible in two directions. and which has mounted there'oniaseries of transverse flights. 89., sai'd'flights being mounted at their middle. points on the: chain 88. In order that this movable chain may move. easily around lateral curveswhen; thev section [3 is swung horizontally, the sections ll and 13 are provided with side. flanges 90 and 9|, respectively. Arran ed to span the. swivelled member are; two fi xiblcsfiange sections. 9.2.;which are secured to the flanges Si. and extend forwardly so as to pass just outside of the dances 90. as will be seen in Figure 3.. Guides 93, secured to the flanges .fhld h.e ends. oi. the. flexible sections 92 in p a e at th ends. oi'the. flanges enduring t lateral swingin movement of the section I The sections: 91 may be constructed or spr n steel or similar resilient material, so that they will form themselves into smooth QUIVGS, '8. incetediindotted lines inl ure 3. w en the section |3 is, swung to one side. Thus, the section 92, which. is, on the inside. of the curve. provides a guide over which the flights 89 may slide in a in the turn.

In place of the mounting of the hoisting device as. shown in Figure 7, the cylinder 14 may be mounted for uniform movement on a ball-andsocket joint, as indicated at 94 in Figure 8.

The flexibility of; the machine will be. apparent by consideration of Figures 9 to 13-, inclusive; for although the illustrations have a track-mounted; gath ring loader the advantageous features are-alsopresent in the Caterpillar type gathering loader.

The gatheringmechanism will gather the material from the face of the vein and the coal or other. material is then, carried by the elevating conveyor I to the-fixed section 9 which forms a hopper. The. gathering mechanism is capable of vertical and horizontal'movements, not only to adapt itself to the face of the coal but also the vertical and lateral contour of the vein followed by the track or roadway. The coal is taken from the hopperby the loading conveyor and deposited into a cansuch as shown at H12. It willbe particularly noted that the loading conveyor is susceptible of movements vertically so that the. delivery-of the coal in the car can be effectuated under very low-head-room. This is accomplished by reason of the fact that the-terminal section I3 is pivoted to the section II so as to swing vertically thereon, while the section II is also pivoted at its forward end. Furthermore, by mounting the terminal section I 3 to swing horizontally on the section II the receiving car I02 may be On a side track or roadway.

The adaptability of the gathering loader to op-' erate in a vein which dips, is shown, in Figures 10 and 11, in which. the. condition is somewhat exaggerated although, it; must be kept in mind thatthe, total over-all length of the machine is quite... extensive, being in a particular design about. 317 feet long. Due to the fact that the gathering head can swing vertically'and even horizontally, and-that the sectionsv Hi and I3 are pivoted asshown, the. machine can accommodate itselfto extreme conditions-of rises and dips whilestill permitting eflicient. gathering. and: loading of the material.

Figure 12 further illustrates 'the adaptability of the machine if the ceiling of the mine entry be low, as indicated. at. A. The hinging of the terminal section for verticalmovement on the.

section I l, and thehinging. of the latter, will prevent interference with the. ceiling as would be the caseif the terminal section were not hinged. This latter condition can readily be visualized by considering thetermlnal section simply an extension 01' the section II as shown by dotted lines. When the machine operates in so-called high coal where. the ceiling may be higher as at B, it, will be seen that here again the terminal section'can workclose to the ceiling, while it it were not hinged on'the. section II the condition of interference would be as indicated by dotted lines.

Figure. 13' shows another condition encountered wherethere is not. only alow ceiling A, but also timbers bracing th ceiling, one: of which is indicated at 6.. The. mine cars I02 are olten made of such height ithat'they will just pass under such timbers. Figure 13' shows how the terminal section can be worked over the front edge of the mine car and lowered so as to pass the timber, C, andxreach to the end or the car. In this way the machine may be worked in a normal manner to fill the car, while providing ample clearance above both the sections it and Hi to permit the coal on the conveyor to be carried thereby without interference by contact with the ceiling orany downward projection from the ceiling, such as the timber C. 1 I i It will be seen, therefore, that this invention accomplishes its objects-in providing a. loading machine of this character, which may be built low enough to operatein low veins of'coaL'or the like, and under the varying conditions encountered but which is still flexible and capable of operating in any other situation. The front portion 01' the machine, including the conveyor 3 and its gathering devices, is strongly supported upon the carriage, while, at the same time, it is low in height. The arrangement of fiat gears lying horizontally upon a low bracket provides for driving connections runningforwardly a comparatively long distance without occupying the height that upstanding gears or bevel gears would occupy. The front conveyor is swivelled on the carriage by means of the members It and I1 in such away as to be adequately supported by vertically spaced bearings. These are capable of sustaining a great weight suspended in cantilever-relation to the carriage, while, at the same timepermitting the side'swing of the boom 3. The loading conveyor-is solidly supported at its front endandarranged forelevation 01' its section at the rear'end thereof. 4 Accordingly, when operating in entries of normal height, this end maybe elevated to reach any type of mine car. The arrangement, by which the after section 13 mayswivel as well as swingvertically, provides forloading cars which may of necessity be placed laterally with respect tothe carriage and at any relative elevation.

While the; invention has been described as embodied in a unitary structure, it will be understood that individual features or sub-combinations thereof may beuseful' by themselves with-- V out reference to other features or the complete combinationfand it is understood that the employment of such individual features or sub-combinations is contemplated by this invention when within the-scope of the appended claims.

It is further-understood that various changes may bemade in the details of construction within the scope of the appended claims without departing from the spirit of this invention, and that the invention is not limited tothe specific details shown and described.

Having thus described the invention, what is claimed is:

1. A loading machine of the character described, comprising a locomotive carriage, a sectional conveyor having one of its sections pivoted at its front end on said carriage for, substantial elevating movement of the rear end thereof, and a second section carried by the movable part of said first section and jointed for horizontal and vertical swinging movement relative to and into and out of the plane of said first section, a hoisting device supported on said carriage and arranged for operation to elevate and lower the movable end of said first section, and means on said movable part for swinging said second section on said first section to different adjusted positions'relative to the latter.

2. In a conveyor structure for a loading machine of the character described, a sectional conveyor having one of its sections pivoted at its front end for substantial elevating movement of the rear end thereof, a member horizontally swingably mounted on the rear part of said section, a second section carried by said member and mounted thereon for vertical swinging movement relative to and into and out of the plane of said first section, a hoisting device on said movable part arranged for operation to elevate and lower said member, and means carried by said member operable to swing said second section.

3. A loading machine of the character described, comp-rising, a locomotive carriage, a sectional conveyor having one of its sections pivoted at its front end on said carriage for substantial elevating movement of the rear end thereof, a member horizontally swingably mounted on the rear part of said section, a second section carried by said member and mounted thereon for vertical swinging movement relative to and into and out of the plane of said first section, a hoisting device supported on said carriage and arranged for operation to elevate and lower said member,

and means carried by said member operable to swing said second section.

4. In a conveyor structure for a loading machine of the character described, a sectional conveyor having one of its sections pivoted at its front end for substantial elevating movement of the rear end, a member horizontally swingably mounted on the movable part of said section, a second section carried by said member and mounted thereon for vertical swinging movement relative to and into and out of the plane of said first section, a hoisting device arranged for operation to elevate and lower said member, a support for said hoisting device constructed and arranged to move laterally with said member, and means carried by said member operable to swing said second section.

5. In a conveyor structure for a loading machine of the character described, a supporting structure, a sectional conveyor having one of its sections pivoted at its front end on said structure for elevating movement of the rear end thereof, a member horizontally swingably mounted on the movable part of said section, a second section carried by said member and mounted thereon for vertical swinging movement relative to and into and out of the plane of said first section, a carrier swingable on said supporting structure on substantially the same axis said carrier and connected to elevate and lower said member, and means supported by said first section operable to swing said second section on said member. 1

6. In a conveyor structure for a loading machine of the character described, a supporting structure, a sectional conveyor having one of its sections pivoted at its front end on said structure for elevating movement of the rear end thereof, a member horizontally swingably mounted on the movable part of said section, a second section carried by said member and mounted thereon for vertical swinging movement relative to and into and out of the plane of said first section, a hoisting device mounted on said supporting structure for lateral movement with said member and connected to elevate and lower said member, and means to swing said second section on said member.

7. In a conveyor structure for a loading machine of the character described, a sectional conveyor having one of its sections pivoted at its front end for substantial elevating movement of the rear end thereof, and a second section carried by said first section at the movable end thereof and jointed for horizontal and vertical swinging movement relative to and into and out of the plane of said first section, a hoisting device arranged for operation to elevate and lower the movable end of said first section, and means carried by said first section for swinging said other section to different adjusted positions relative to said first section at any position of the latter.

8. In a conveyor structure for a loading machine of the character described, a sectional conveyor having one of its sections pivoted at its front end for substantial elevating movement of the rear end thereof, and a second section carried by said first section at the movable end thereof and jointed for vertical and horizontal swinging movement relative to and into and out of the plane of said first section, and means for independently moving-said respective sections to different adjusted positions.

JOHN L. CLARKSON. ALLTON B. JACKSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,422,926 Chadwick July 18, 1922 1,518,759 Sayers Dec. 9, 1924 1,569,209 Shanaberger Jan. 12, 1926 1,619,260 Joy Mar. 1, 1927 1,785,402 Arentzen Dec. 16, 1930 1,839,625 Whaley Jan. 5, 1932 1,987,262 MacEachen Jan. 8, 1935 2,047,589 Levin July 14, 1936 2,062,555 Cartlidge Dec. 1, 1936 2,141,482 McCraw Dec. 27, 1938 2,144,871 Clarkson Jan. 24, 1939 2,197,169 Andershock 'Apr. 16, 1940 2,210,655 Doberstein Aug. 6, 1940 2,216,546 Cartlidge Aug. 6, 1940

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