US2630902A

US2630902A - Loading machine

Info

Publication number: US2630902A
Application number: US552243A
Authority: US
Inventors: Roy S Bigelow
Original assignee: Goodman Manufacturing Co LP
Current assignee: Goodman Manufacturing Co LP
Priority date: 1944-09-01
Filing date: 1944-09-01
Publication date: 1953-03-10
Anticipated expiration: 1970-03-10

Description

R. S. BIG ELOW LOADING MACHINE March 10, 1953 8 Sheets-Sheet 1 Filed Sept. 1, 1944 W. Y m W V b? m e 7 T. w w m YN f li: A & Q w g V .1 r. V

March 10, 1953 R. s. BIGELOW 2,530,902

LOADING MACHINE Filed Sept. 1, 1944 8 Sheets-Sheet 2 March 10, 1953 -R. s. BIGELOW 0,

LOADING MACHINE March 10, 1953 RS. BIGELOW 2,630,902

LOADING MACHINE Filed Sept. 1, 1944 '8 Sheets-Sheet 4 VTENTOR ATTORNEY March 10, 1953 R. s. BIGELOW LOADING MACHINE Filed Sept. 1, 1944 8 Sheets-Sheet 5 March 10, 1953 I R. S. BIGELQW LOADING MACHINE 8 Sheets-Sheet 6 Filed Sept. 1, 1944 Nww. 31 R NN MM lllil l IIL m3 Rm R. 5. BIG ELOW March 10, 1953 4 LOADING MACHINE 8 SheetsSheet 7 Filed Sept. 1, 1944 Kay 12 g /41 'rom a=r oeooeooooe Patented Mar. 10, 1953 TENT OFFICE LOADING MAGHINE Roy S Bigelow, Chicago, 111., assignor to Goodman Manufacturing Company, Chicago, 111., a

corporation of Illinois Application September 1, 1944, Serial No. 552,243

21 Claims. 1

This invention relates to improvement in loading machines and more particularly to an improved form of loading machine adapted to load coal onto a shaker conveyer trough line in thin seams of coal.

The principal objects of my invention are to provide av loading machine of a low overall height, which is relatively light in proportion to its loading capacity and which is so arranged as to load directly onto the inby end. of a shaker conveyer.

A more specific object of my invention i to provide a self-propelled loading machine operatin against a fixed reaction member arranged to take the thrusting loads thereof during loading, to enable the weight of the machine to be reduced over former loading machines of the same general type, and having an extensible conveyer with means for extending the conveyer by power against said fixed reaction member, to feed the gathering head into the material it is desired to load.

Another object of my invention is to provide a self-propelled loading, machine pivotally connected adjacent its rear end to a. stationary base forming a mounting for a swivel connected with the inby end of a shaker conveyer trough line, for holding the loading machine for lateral movement about the axis of the swivel, and

forming av reaction means for the loading machine,- during feeding of the gathering head into the material it is desired to load, which loading machine is so arranged as to have a conveyer trough of the shaker conveyer trough line slidably guided therein, so it may load material directly onto said trough,

A still further. object of my invention is to provide. a rubber tire mounted loading machine having front steering and propelling wheels. and rear caster mounted supporting wheels, for supporting and propelling the machine in a forward or return direction, with means for positioning the steering and propelling wheels to swing the. machinelaterally, to; position the gathering element for picking up material to either side of the center line of the machine.

Other objects of myinvention will appear from time to time as the following specification proceeds' and with reference to the accompanying drawings wherein:

Figure l is a top plan view of a loading machine constructed in accordance with my invention. showing the machine pivotally connect- 2 ed at its rear end to the swivel of; a shaker can veyer trough line;

Figure 2 is a view in side elevation of the loading machine shown in Figure 1, drawn to a slightly larger scale than Figure 1 and showing the machine in a retracted position;

Figure 3 is a view drawn to substantially the same scale as Figure 2, but showing the machine in an extended position;

Figure 4 is a View in side elevation of the machine, showing the machine in a retracted position but extended along the means for connecting it to the swivel of the shaker conveyer trough line;

Figure 5' is an enlarged, detail fragmentary plan view of the forward portion of the machine shown in Figure 1, with certain parts broken away and certain other parts shown in horizontal section;

Figure 6v is a detail fragmentary plan view or the rear part of the machine, drawn to the same scale as Figure 5, with certain parts broken away and certain other parts shown in horizontal section;

Figure 7. is a detail fragmentary view in side elevation of the forward part of the machine, drawn to the same scale as Figure 5, with certain parts shown in longitudinal section;

Figure 8 is a detail fragmentary View in side elevation of the central part of the machine, with certain parts broken away and certain other parts shown in substantially longitudinal section;

Figure 9 is a detail fragmentary view of the rear part of the machine; with certain parts broken away andv certain other parts shown in longitudinal section, showing certain detail of the connection of the machine to the conveyer troughv line swivel;

Figure 10; is an enlarged sectionalview taken substantially along line 18-40 of. Figure 6 Figure 11 is an enlarged fragmentary sectional view taken substantially along line ll-llof Figure; 6;

Figure la is an; enlarged fragmentary view in side elevation, showing certain details of. the friction grip block arrangement for holding the loading machine in fixed relation with respect to the swivel, or for permitting advancing or re tractible movement of said loading machine with respect to said swivel;

Figure 13 is an enlarged transverse sectional view taken substantially along line tt-.-ll3 of Figure 5;

Figure 14. is a top plan view of one of the propelling and steering wheels, with certain parts shown in horizontal section, showing certain details of the support and the drive therefor;

Figure 15 is a transverse sectiona1 View taken substantially along line 15-15 of Figure 7, showing certain details of the drive to the gathering mechanism;

Figure 16 is an enlarged detail partial fragmentary transverse sectional view taken along line lE-lt of Figure 6, in order to show certain details of construction of the telescoping conveyer framework; and

Figure 1'7 is an enlarged detail partial transverse sectional view taken along line l'lfl of Figure and showing certain details of construction of the telescoping sections of the conveyor, not shown in Figure 16.

Referring now to Figures 1, 2, 3 and 4 of the drawings, the embodiment of my invention illustrated therein includes generally a face loading machine H! mounted on front rubber tired steering and propelling wheels H, ii and rear supporting caster wheels l2, l2, and including an extensible conveyer l5 with a gathering head i l at its forward end. Said gathering head may be fed into the material it is desired to load by extensible movement of said conveyer, while the loading machine reacts against a stationary base [6.

The rear end of the loading machine is pivotally connected to the stationary base it by means of a link H, pivotally connected adjacent its rear end to said base, for movement about a vertical axis and adjustably connected with the loading machine, so said loading machine may be extensibly and retractibly moved along said link, and so said link may hold said loading machine from backward movement during the loading operation. Said base is held in position on the ground to form a reaction member for the machine during the loading operation by means of jacks l8, l8 adapted to be interposed between said base and the mine roof. Said base forms a mounting for a swivel E9 of a shaker conveyer trough line 28, and has a reciprocating trough 2! communicating with its receiving end and extending therefrom. Said reciprocating trough is slidably guided in the loading machine frame for reciprocable movement with respect thereto, in receiving relation with respect to the discharge end of the conveyer IS.

The shaker conveyer trough line 23 may be reciprocably driven from a suitable reciprocating drive mechanism at its outby end (not shown), in such a manner as to cause material to flow along said trough line from its inby to its outby end, as is well known to those skilled in the art. Said trough line is connected at its inby end to a connecting trough 22 of the swivel H! by means of the usual connecting bolts 23, 23 (see Figure 9).

The connecting trough 22 has a widened and curved forward end, which is adapted to have a cured rear end of a swivel trough 21 nested therein. Said swivel trough has a bearing bos 29 secured thereto and depending therefrom, which is journaled in a bearing member 3 l secured to the bottom of said connecting trough. Said connecting trough is secured to a bridge member 32 as by rivets. Said bridge member is mounted on an upper frame member 33 of a ball frame 34, for pivotal movement with respect thereto about a transverse axis.

The ball frame 36 is of a well known form and 4 includes a pair of longitudinally extending, laterally spaced, outwardly facing guides 35, 35 secured to the top of the base [8, and a pair of corresponding guides 36, 33 connected together by a cross frame 31, and facing said first mentioned guides (see Figure 10). Said guides 36, 35, with said guides 35, 35, form guide races for balls 39, 39, which reciprocably support the upper frame 33 of said ball frame on the base plate 16.

The connection between the upper frame of the ball frame 34 and the bridge member 32 includes a pair of laterally spaced forked connecting

members

40, 30 one of which is secured to the outer side of each guide 36. Tongues 4|, 4i depending from opposite sides of said bridge member are adapted to extend through the furcations of said forked connecting members and to be connected thereto by transverse pivotal pins 63, 43.

The reciprocating trough 2! is secured to the forward end of the swivel trough 2'! by means of the usual connecting bolts at, d5 (see Figure 9). Said reciprocating trough extends forwardly of said swivel trough 27, and is herein shown as being slidably mounted between the wheels of the loading machine on the control link if.

The control link H is herein shown as being in the form of a trough 50, supported to extend beneath the loading machine and pivotally connected to the base It by means of a pivoted connecting link 5! (see Figures 8, 9 and 11). Said trough is rovided with a pair of

flanged bearing members

58, 56 extending along opposite sides thereof, which are adapted to extend within facing channelled guides 51, 57, extending along opposite sides of a main frame 55 of the loading machine and depending therefrom. Said guides, as herein shown, are formed from facing

angles

52, 52 secured at the ends of their vertical legs to and depending from

horizontal plates

58, 58, which are secured to the bottoms of and extend along

side frame members

53, 59 of the frame 55.

The reciprocating trough is nested within and reciprocably supported on the shouldered portions of the sides of the trough 59 of the control link 11. The upper ends of the sides of said trough are adapted to abut bearing strips 53, 53, which are mounted on the bottoms of the

plates

58, 58 and extend therealong, to retain said reciprocating trough 2! within said trough 5G, especially when the loading machine is in an extended position with respect to said trough 2!.

The trough 50 of the link H has a cross frame 66 secured to its rear end, which extends across the bottom thereof and upwardly along opposite sides thereof to a position just beneath the

flanged bearing members

56, 56. The outer sides of said cross frame are provided with vertically extending slotted portions 8!, 3| adapted to receive pivot pins 62, 62 connected to opposite laterally spaced sides of the connecting link 5|, for connecting said link to the rear end of said trough, for a limited amount of free pivotal and vertical movement of said trough with respect to said link.

The connecting link El extends rearwardly from its point of pivotal and vertical slidable connection to the rear end of the trough 59 and has a rear annular portion 63 journaled on a bearing boss 34 extending upwardly from the bottom of the base I5, coaxial with the pivotal axis of the swivel trough 27, when said trough is at the central portion of its stroke. A retaining ring 65, secured to the upper side of said bearing boss and abutting the top of said annular portion 33, is provided to retain said link on said bearing boss and to permit said link to pivot about the vertical axis of said boss.

A means is provided to connect the trough 59 with the frame 55, which is selectively operable to permit the loading machine to be extended along said trough or to hold said frame and loading machine in fixed relation with respect to said trough, so the base It may form a fixed reaction member for the loading machine when extending the gathering head M into the mate.- rial it is desired to load. Said means, as herein shown, includes a carrier member 58 extending along each side of the frame 55 (see Figure. '12). Each of said carrier members has a pair of friction grip blocks 67, 61 pivotally mounted therein and adapted to have gripping engagement with the upper and lower sides of the bearing plates 5'5, 56.

The lower end of the carrier member 66 is connected to a depending arm 59 ofthe frame 55 by means of a yieldable link it. Said yield.- able link includes a spring H encircling a rod12 slid-ably mounted in said depending. arm. One end of said spring abuts said depending arm. while the opposite end of said spring abuts the flange of a flanged sleeve '13, mounted on said rod. A nut E i threaded on said rod is provided to hold said sleeve from forward movement with respect to said rod and to preload said spring. The forward end of said rod is of a forked construction pivotally connected to the lower end of said carrier member by means of a pivotal pin '15. The spring ii is so loaded that the yieldable link is normally a solid member and will only yield upon overload conditions of the grip blocks 5?, 6i, to release said grip blocks and to permit the loading machine to move rearwardly along the trough when the gathering head it engages a solid construction on the ground.

The u per end of each carrier member is pivotally connected to the free end of a piston rod 16 extending from a piston ii, movable within a cylinder 1'8. Said cylinder has an ear l9 extending rearwardly from its rear end, which is interleaved by spaced lugs 89, Si! projecting forwardly from the upper end of the depending, arm 69, and which is pivotally connected thereto. The admission of fluid under pressure to the piston rod ends of said cylinders will thus move the carrier members (it, 66 into, position to positively engage the grip blocks 6i, 6'! with the bearing

members

55, 55, to cause thecontrol link I I to form a fixed reaction member for the loading machine, releasable upon overload conditions by the yieldable link it. The admission of fluid under pressure to the opposite ends of said cylinders will release said grip blocks and permit the loading machine to be moved along said link and the reciprocating trough 2i.

The jacks l8, l8 for holding the base it in a stationary position on the ground during the loading operation are herein shown as being hydraulic jacks, each including a cylinder 3% mounted on the base It at its head end and so arranged that fluid under pressure may enter the head end thereof (see Figure 10). A piston 82 movable within said cylinder has a piston rod 83 extensible from the piston rod end of said cylinder through suitable packing. The upper portion of said piston rod is threaded, and has a cylindrical member 84 threaded thereon for adjustment therealong. Said member has a roofengaging shoe 85 transversely pivoted to its upper end. A handle 85 is operatively connected with the member 84, for turning said member along said piston rod to bring the roof-engagingshoe 85. into proximity with the mine. roof. Fluid 1111-5.

der pressure is then admitted to. the; head end of said cylinder 8| to engage said shoe with the mine roof and to hold said shoe in engagement therewith.

Fluid under pressure is. supplied to the cylinders 8 I, 81 by means of amotor driven fluid pump 81 mounted on the base It and obtaining fluid from a fluid storage tank 68, which is also mounted on said base. Suitable control valves (not shown) are provided to control the admission and release of fluid to said cylinders, and to hold fluid under pressure in said cylinders.

Thus when the jacks l8, l8 are engaged with the mine roof, to hold the base It in a stationary position on the mine bottom, said base, besides forming a, support for the swivel [9, may also form a reaction means for the loading machine, to take the rearward thrusts of the machine thereon through the link H, to permit the gather ing head i l to be readily fed into the material it is desired to load, and :to permit the front traction and steering wheels H, II to swing the loading machine laterally about the axis of pivotal connection of said link to said base.

The frame 55 includes the parallel spaced side frame members. 59, 59 which are connected to gether at their lower ends by a bottom plate 89, forming a support for the lower run of an endless chain .88 for the conveyer. Said side frame members are also connected together by a bottom plate 99 spaced upwardly from said last mentioned bottom plate and forming a bottom for the conveyer at its discharge end. Said frame forms a supporting guide frame for an extensible frame 9| extensibly mounted within said frame. 55, for extending said conveyer and the gathering head i4 into the material it is desired to load. Said extensible frame rests on the bottom plate for slidable movement therealong. Said frame 55 also forms a support for a motor 92 on its right-hand side when looking towards the forward. end thereof. Said motor is supported on a bracket 93 secured to and extending lateraliy from the right-hand plate 58 and serves to drive the conveyer l5 (see Figure 5). A motor 94 isalso mounted on said main frame on a lateral extension 95 of the left-hand plate 58. Said motor is provided to drive a fluid pump 96, for

' supplying fluid under pressure to apply the fric tion grip blocks 61, 6'1, to extend the conveyer l5 and to drive and steer the front traction and steering wheels H, i I (see Figures 1 and 13).

The front traction and steering wheels II, II

are mounted on the frame 55 on a transverse dead axle 91', which is mounted on the bottom of the bottom plate 8d of said frame on a longitudinally extending pivot pin 98, mounted at its ends in

angle brackets

99, 99, secured to and depending from said bottom plate (see Figure 8). Said angle brackets extend entirely across said bottom plate and form a transversely extending slidable guide for said axle (see Figure 13). Said wheels are mounted on opposite ends of said axle for steering on the usual Lemoine pivots having swiveling axles I03, I63 extending from swivel brackets H34, H34, which extend along, the upper and lower sides of and are pivotally mounted on upright standards I55, [05 at the ends of said dead axle. Said wheels may be of any suitable heavy duty construction including hubs I06, I06 journaled on said swiveling axles and having rims NH, Nil detachablymounted thereon (see Figures 13 and 1.4).

7.. A ring gear I69 having an inwardly extending flanged portion I I9 is secured to an inner flange III of each hub to provide a means for driving said hub and wheel. Said ring gear is herein shown as being meshed with a spur pinion II2 on the outer end of a transverse shaft I I3. Said shaft is journaled in a worm and worm gear housing I I4, which is suitably mounted on a plate II5 projecting inwardly from the swivel bracket I84 of the Lemoine pivot, and mounted thereon. Said shaft and pinions are driven from a worm gear I IT on said shaft, which meshes with a worm II 8 (see Figure 13). A fluid motor H9 mounted on said plate is provided to drive said worm through a flexible drive connection I26.

A fluid storage tank I 2I is provided on the machine frame to store fluid so it may be supplied under pressure to the motor II9 by means of the pump 96. Suitable valves (not shown) also are provided to control the passage of fluid to said motor and back to the return. Said control valves are not herein shown or described since they form no part of my present invention.

Turning of the wheels about the axes of the Lemoine pivots, for steering, is effected by means of a pair of projecting lever arms I23, I23 secured to and extending angularly inwardly and rearwardly from the swivel brackets I54, I84, and having transversely extending rods I24, I24, pivotally connected to their rear ends by the usual ball and socket connections (see Figures 5 and 13). Said rods have pistons I25, I25 connected to their inner ends, which are mounted in a cylinder I26. Fluid passageways 12?, I27

are provided in opposite ends of said cylinder to admit fluid under pressure therein, to cause the pistons I25, I25 to move to the extreme inner positions in said cylinder shown in Figure 5. Movement of said pistons inwardly along said cylinder is limited by shouldered portions 29, I29 thereof. When the pistons are in this position, fluid under pressure may be held in opposite ends of said cylinder, to cause said rods and cylinder to act as a unitary tie rod, for turning the wheels for steering when transversely moved in one direction or another. An arm I30 projects rearwardly from the central portion of said cylinder and has a drag link IEI pivotally connected thereto by a usual ball and socket connection. The opposite end of said drag link is pivotally connected to a rocking arm I34 by means of a similar ball and socket connection. Said rocking arm is mounted on the lower end of a vertical shaft I36 and is rocked back and forth, to eflect steering, by means of a hand Wheel I31 through a usual worm and worm gear steering connection (not shown), mounted in a housing I38, secured to a bracket I39, extending outwardly from the outer side of the left-hand side frame member 59.

The cylinder 128 also has a fluid passageway I48 midway between its ends, to admit fluid under pressure to the head ends of the pistons I25, I25, to cause said pistons to move to the extreme outer ends of said cylinder, and to be held in such a position by fluid pressure within said cylinder, to pivot the wheels II, M outwardly at substantially right angles to the longitudinal axis of the machine, so said wheels may; propel the loading machine and gathering element laterally about the bearing boss 54 on the base I6, to position the gathering head I4 to one side or the other of the center of the conveyer trough line, so as to pick up loose material from the in any desired position by the admission of fluid under pressure to opposite ends of said cylinder and through the port I49 intermediate the ends thereof. It should here be noted that when the Wheels II, II are swung to extreme positions, to propel the machine laterally about the swivel I9, that one of the fluid motors must be reversed so the two wheels will be driven in the proper direction. The reversal of said motors is controlled by suitable valve mechanism, which is not herein shown or described since it is no part of my present invention.

The rear caster supporting wheels I2, I2, which support the rear end of the machine, are each journaled on a horizontal dead axle II on ball earings I42, I42 (see Figure 11.). Said axle is mounted at its ends in a fork I43 journaled at its upper end in the outer end of a laterally extending bracket I44, on a roller bearing I45. Said bracket is secured to the outer side of the side frame member 59 and extends laterally and upwardly therefrom, to form a vertical pivotal support for said wheel, to permit said wheel to turn about a vertical axis, to conform to the path of travel of the machine, when said machine is moving in a longitudinal or a lateral direction.

The extensible frame 9I includes a pair of parallel spaced side frame members I49, I49 having outwardly flared upper sides forming a flared trough for the conveyer and connected together adjacent their upper ends by a plate I50 which forms a bottom plate for the upper run of the extensible conveyer I5. Said side frame members are connected together adjacent their lower ends by a plate I5I which forms a bottom plate for the upper run of the lower portion of the conveyer and which slidably rests on the bottom plate 93 (see Figures I5 and I3). An intermediate plate I52 is also connected between said side frame members and forms a support plate for the return run of the upper part of the extensible conveyer. The side frame members I49, Hi9 each has a channelled guide portion I53 extending outwardly from the upper end thereof, which is adapted to be engaged by a gibbed guide I54 extending inwardly from the side frame member 59, to slidably guide said extensible frame in said side frame member.

The forward ends of the side frame members I49, I55 are connected together by cross braces I55, I56 and by an angular guide shoe I57 forming a continuation of the plate I5I and adapted to be engaged by the upper side of the lower run of the conveyor chain, to guide said chain around a tension idler roller i59 mounted on the gathering head It (see Figure 7).

A pair of endless chains 68, I69 extending along and mounted on the outer sides of the

side frame members

59, 59 and operatively connected with the extensible frame 9|, are provided to extensibly or retractibly move said extensible frame 9| with respect to said frame '55. Said chains are trained around idler sprockets IGI, iEI mounted adjacent the rear ends of said side frame members, on transverse stub shafts I62, I62, mounted on the outer sides of the

side frame members

59, 59 and extending outwardly therefrom (see Figure 6). Said endless chains are trained, at their opposite ends, around drive sprockets I64, I64 on a transverse shaft I65 journaled at its ends in the

side frame members

59, 59 of the frame 55.

The connection between the extensible frame Y fluid motor through the pump 3%.

SI and the endless chains E66, I66 includes a pair of connecting members I65, I66 secured to the intermediate plate I52 and extending laterally therefrom through the Side frame members Hi9 and through longitudinal slots I51, iiii formed in the side frame members 59, 5%! (see Figures 9, 11' and i6). Said connecting members are suitably connected to links of the endless chains E59, E66, so said chains will move said extensible frame along the main frame 55, upon movement of said endless chains.

The endless chains I66, I69 are driven from a fluid motor I39 mounted on a platform Ill projecting outwardly from the left-hand forward end of the frame '55. Said fluid motor has connection with and forms a means for driving a wonn. and worm gear reduction ii I, which in turn has drivin connection with the transverse shaft I65 by means of a spur gear reduction I'M. The fluid motor IE5 is a reversible motor so that when fluid under pressure is admitted to drive said motor in one direction, the frame 5i will be extended along the frame 55 to feed the gathering element is into the material it is desired to load, and when fluid under pressure is admitted to drive said motor in a reverse direction, said extensible frame will be retractibly moved with respect to said frame 55, to withdraw said gathering element from the loose material. Fluid is supplied to said The connection from said pump to said motor and the fluid control valves for controlling the admission and release of fluid under pressure to said fluid motor, are not herein shown or described, since the hydraulic system is no part of my present invention.

The gathering head M is mounted on the forward end of a longitudinally extending inclined frame I15, which is transversely pivoted to the forward end of the extensible frame Si (see Figures 5 and '7) The upper portion of said inclined frame forms an inclined trough for the inclined elevating portion of the conveyer i5. Said frame is provided with a pair of rearwardly extending trunnion brackets I'll, IIl trunnioned on trunnion shafts H9, H9, secured to and projecting laterally from the outer sides of the extensible frame 9!.

The gathering head It, herein shown, is of a well known form of endless chain gathering head and includes an inclined apron iSil mounted on the forward end of the inclined frame H6 and extending across the front end of the conveyer I5 to the ground. A pair of chain guiding members i8!, :5! having endless chains H 2, l8-2 guided for orbital movement thereabout are mounted on the top side of said apron, as usual, so as to extend along opposite sides of and forwardly of said conveyer. A pl rality of gathering arms i183, I 83 are carried by said endless chains for picking up material from the ground and moving it along the forward portion of said apron onto the conveyer.

The endless chains :82, E82 and gathering arms 83, I33 are orbitally driven about the chain guiding members 18 i, Mi by means of bevel gear reductions I155, 155 driven from opposite ends of a forward idler shaft I86 of the conveyer I5, through chain and sprocket drives i8? 481 (see Figures 5 and The gathering. head i i and inclined frame I1 6 are elevated or lowered about the trunnion shafts H9, IE9, by means of a pair of double-acting fluid pressure cylinders i 88, having piston rods 583, 1st extensible therefrom. .Each of said cylinders is provided with a rearwardly projecting car I90 pivotally connected to a connecting member I9 I, depending from the forward. end of the extensible frame SI. The fre end of said piston rod is pivotally connected to a connecting bracket I92, extending outwardly from the outer side of the frame H6, so that when fluid under pressure is admitted to the head ends of said cylinders, the gathering element will be positively raised by power, and when fluid under pressure is admitted to the piston rod ends of said cylinders, said gathering element will be lowered by power.

A pair of compression springs I93, I93 are connected between the depending connecting memher see and the underside of the apron I adjacent the upper end thereof, to cushion the fall of said gathering head, in cases where pressure might be suddenly relieved from the cylinders I88, I88, and to support the forward end of said gathering head in floating engagement with the ground.

The conveyer i5 is herein shown as being a single center strand conveyer having a plurality of parallel longitudinally spaced flights I95, I95 extending laterally from the endless chain 88. Said chain and flights are trained from an idler sprocket I 91 on the transverse shaft I86, upwardly along an inclined plate i88, extending between the side walls of the inclined frame I16. At the upper end of said last mentioned plate, said chain extends along the plate I50, connecting the side frame members I49, I49 of the extensible frame ti together, to an idler sprocket We on a transverse shaft 23E), journaled at the rear end of said frame ill (see Figures 6, 9 and 11) From said idler sprocket said conveyer extends towards the forward end of the machine, along the top of the intermediate plate I 52, to and around a drive sprocket ZQI on a transverse drive shaft 282, journaled adjacent its ends in opposite

side frame members

59, 59 of the main frame 55.

The side frame members hi9, I49 of the extensible frame 9| are provided with longitudinal slots 25%, 2% extending therealong to permit movement of said extensible frame with respect to said drive shaft (see Figures 3, 5, 7 and 13). From said drive shaft said chain extends forwardly along the bottom plate I5I of the extensible frame 9!, towards the rear end of the machine and along a bottom plate of the frame 55, to and around an idler sprocket 205 on a shaft 266, journaled at the rear end of the main frame 55 in the

side frame members

59, 59. From thence said chain extends in an upwardly inclined direction, to and along the top of the bottnm plate 89 of said main frame, to the forward end of said frame and upwardly beneath the inclined shoe $51, over the tension idler I59, and in a downwardly inclined direction, to and around the idler sprocket IE? on the transverse shaft I86.

The drive shaft 252 and sprocket 20] are driven from the motor 9.2 through a worm and worm gear speed. reducer 20%? mounted in a casing 2019: secured to the end of the shell of said motor. A chain and sprocket drive indicated generally by reference character 2m and driven from said speed reducer, has drive connection with the outer right-hand. end of said shaft (see Figures 5 and 13).

Thus the conveyor I5 may .be positively extended to extend the gathering head It for loading by movement of the chains I60, I60, and may be driven in all of its extended positions to convey material along the machine frame and discharge it into the reciprocating trough 21 from a low point on the'loading machine. Since the upper portion of the extensible conveyer extends along the upper portion of the extensible frame 9| and discharges onto the lower portion of said conveyer, which extends along the lower portion of the stationary frame 55, and discharges into the reciprocating trough 2!, the dropping of the coal onto the pan line from a high point on the machine is avoided, which reduces strains on the pan line and reduces breakage of the coal during loading.

In operation the loading machine is moved into the Working place by means of its steering and propelling wheels I I, l I in position so the reciprocating trough 2i of the trough line 213 can be extended beneath said loading machine in receiving relation with respect to the conveyor 15, and supported and guided'in the trough of the control link I! and so said control link I! can be pivotally connected at its rear end to the base it for the swivel 19. been extended beneath said loading machine, and said control link has been pivotally connected to said base, the jacks l8, l8 are set so as to firmly hold said trough in position on the ground. When initially starting the loading operation, the entire loading machine is usually in a retracted position with respect to the reciprocating trough 2i and the grip blocks 67, 6'! may be engaged with the bearing

members

56, 56 of the trough Eli, to hold the loading machine from movement along said control link ll. At this time the forward end of the gathering head i should be adjacent the broken down coal so it can readily pick it up.

Said gathering head may then be fed into the broken down coal by extending the extensible conveyor l5 until all of the coal in front of said gathering head has been loaded out. Said gathering head may then be retractibly moved by retracting the conveyor i5. At the same time the steering and propelling wheels may be turned at substantially right angles to the machine frame, to feed the loading machine and gathering head laterally to one side or the other, so as to load out the entire working place, it being understood that during this loading operation the conveyor I5 is continually extensibly and retractibly moved with respect to the frame 55, to extend the gathering head [4 into and to withdraw it from the broken down coal.

After the first place has been loaded out and the working face has been undercut and broken down, the grip blocks 51, 61 may be released from the bearing plates 56 and the loading machine may be extended along the reciprocating trough 50, as shown in Figure 4, so as to load out another working place without advancing the swivel i9 and base Iii. When the loading machine has reached the end of the trough 5B, the swivel 19 may be advanced by inserting another trough in the trough line, or another trough may be connected to the trough 50, to further extend the range of advance of the machine, it being understood that if the trough 50 is extended by the insertion of another similar trough, that the trough 2| must likewise be extended.

While I have herein shown and described one form in which my invention may be embodied, it will be understood that the construction thereof and the arrangement of the various parts may be altered without departing from the spirit and scope thereof. Furthermore, I do not wish to be construed as limiting my invention to the specific embodiment illustrated, excepting as it may be limited in the appended claims.

When said reciprocating trough has I claim as my invention:

1. In a face loading machine of the class described, a main frame, wheels for supporting and propelling said main frame in a forward or a latoral direction, an extensible conveyor extending along said frame beyond the forward end thereof, and having gathering devices at its forward end, means for extending said conveyor for feeding said gathering devices into the material it is desired to load, and means connected with and forming a reaction mean for said loading machine for holding said loading machine from backward movement during extension of said conveyor and gathering devices into th material it is desired to load and for controlling lateral movement of said loading machine including a base, means for holding said base in a fixed position on the ground, a link, a vertical pivotal connection between said link and said base, and an extensible connection between said link and said loading machine, permitting said loading machine to be extensibly or retractibly moved along said link.

2. In a face loading machine of the class described, a main frame, wheels for supporting and propelling said main frame in a forward or a lateral direction, an extensible conveyor extending along said frame beyond the forward end thereof and having gathering devices at its forward end, means for extending said conveyor for feeding said gathering devices into the material it is desired to load, and means connected with and forming a reaction means for said loading machine for holding said loading machine from backward movement during extension of said conveyer and gathering devices into the material it is desired to load and for controlling lateral movement of said loading machine including a base, means for holding said base in a fixed position on the ground, a link, a vertical pivotal connection between said link and said base, and means connecting said link with said loading machine, for holding said loading machine in fixed relation with respect to said link, or for permitting said loading machine to be extensibly or retracti-bly moved with respect to said link.

3. In a face loading machine of the class described, a main frame, wheels for supporting and propelling said main frame in a forward or a lateral direction, an extensible conveyor extending along said frame beyond the forward end thereof and having gathering devices at its forward end, means for extending said conveyer for feeding said gathering devices into the material it is desired to load, and means connected with and forming a reaction means for said loading machine for holding said loading machine from backward movement during extension of said conveyer and gathering devices into the material it is desired to load and for controlling lateral movement of said loading machine including a base, means for holding said base in a fixed position on the ground, a link, a vertical pivotal connection between said link and said base, and means connecting said link with said loading machine, for holding said loading machine in fixed relation with respect to said link, or for permitting said loading machine to be extensibly or retractibly moved with respect to said link, said means including a pair of friction grip blocks and means selectively operable to hold said friction grip blocks in a gripping or rel-eased position.

4. In a face loading machine of the class described, a main frame, wheels for supporting and propelling said main frame in a forward or .13 a lateral direction, "an extensible endless conveyer extending along said frame beyond the forward end thereof and having gathering devices at its forward end, a conveyer extending into the working place and mounted in material receiving relation with respect to said first con- 'veyer, means for extending said first conveyor for feeding said gathering devices into the material it .is desired to load, and means connected with and forming a reaction means for said loading machine, for holding said loading machine from backward movement during extension of said first conveyer and gathering devices into said material and for controlling lateral movement of said loading machine, said means also forming a slidable guide means for said second conveyer, for holding said second mentioned conveyer in receiving relation with respect to the discharge end of said first conveyor in all positions of said leading ma chine with respect to the working place.

'5. In a face loading machine of the class described, amain frame, wheels for supporting and propelling said main frame in a forward or a lateral direction, an extensible endless conveyer extending along said frame beyond the forward end thereof and having gathering devices at the forward end thereof, a conveyor extending into "the working place and mounted in material receiving relation with respect to said first 'conveyer, means for extending said first conveyer for feeding said gathering devices into the material it is desired to load, and means connected with and. forming a reaction means for said loading machine for holding said loading machine from backward movement during extension of said first conveyor and gathering devices into said material and for controlling lateral movement of said loading machine including a base, means for holding said base in a fixed position on the ground, a link connected with said loading machine, a vertical pivotal connection between said link and said base, said link also forming a slidable support and guiding means for said second conveyor, for holding said second mentioned conveyer in receiving relation with respect to said first conveyer in all positions of said loading machine with respect to the working place.

6. In a face loading machine of the class described, a main frame, wheels for supporting and propelling said main frame in a forward or a lateral direction, an extensible endless conveyer extending along said frame beyond the forward end thereof, and having gathering devices at its forward end, a conveyor extending into the working place and mounted in material receiving relation with respect to said first conveyer, means for extending said first conveyor for feeding said gathering devices into the ma-- terial it is desired to load, and means connected with and forming a reaction means for said loading machine for holding said loading machine from backward movement during extension of said first conveyor and gathering devices into said material and for controlling lateral movement of said loading machine including a base, means for holding said base in a fixed position on the ground, a link connected with said loading machine, a vertical pivotal connection he I tween said link and said base, said link also forming a sli-dable' support-and guiding means for said second conveyor, for holding said second mentioned conveyer in receiving relation with respect to said first conveyor in all positions of iii) saldloading machine with respectto the "working place, and the connection between said loading machine and said link being extensible and being operable to permit said loading machine to be extended along said link, or to hold said loading machine in fixed relation with respect to said link.

7. In a face loading machine of the class described, a main frame, wheels for supporting and propelling said main frame in a forward or a lateral direction, an extensible endlessco'nveyer extending along said frame beyond the forward end thereof and having gathering devices at its forward end, a conveyor extending into the working place and mounted in material receiving relation with respect to said first conveyer, means for extending said first conveyor for feeding said gathering devices into the material it is desired to load, and means connected with and forming a reaction means for said loading machine for holding said loading machine from backward movement during extension of said first oonveyer and gathering devices into said material and for controlling lateral movement of said loading machine including a base, means for holding said base in a ffixed position on the ground, a link connected with said loading machine, a vertical pivotal connection between said link and said base, said link also forming a slidable support and guiding means for said second conveyer, for holding said second mentioned conveyer in receiving relation with respect to said first conveyer in all positions of said first conveyer with respect to the working place, and the connection between said loading machine and said link being extensible .and being operable to permit said loading machine to be extended along said link, or to hold said loading machine in fixed relation with respect to said link, and including a pair of friction grip blocks manually controllable to hold said loading machine in fixed relation with respect to said link, or to release said loading machine for movement along said link.

8. In a face loading machine of the class described, a main frame, front steering wheels for propelling said main frame in a longitudinal or lateral direction, rear idler wheels for said main frame, said rear idler wheels being mounted for free movement about vertical axes to conform to the paths of said steering wheels during movement of the machine in a longitudinal Or a lateral direction, and means for turning said front wheels for steering, said means being operable to turn said front wheels in opposite directions to positions to propel said main frame laterally and to hold said front wheels in such positions, and including a lever arm connected with each of said front wheels, and an extensible tie rod connected between aid lever arms, said tie rod including a laterally movable fluid. pressure cylinder, a rod extensible from each end of said cylinder, said rods having operative connection with said lever arms, and fluid pressure means for extending said rods with respect to said cylinder for turning said front wheels in opposite directions to laterally extended positions and holding said. wheels in'such positions, and for retracting said rods within said cylinder and positively holding said rods in such positions to move with said cylinder upon lateral movement thereof, for steering the'machine.

9. In a face loading machine of the class de scribed, a main frame, front ste'ering-wh els for propelling said main frame a longitudinal "or a lateral direction, rear idler wheels for said main frame, said rear idler wheels being mounted for free movement about vertical axes, to

conform to the paths of said steering wheels during movement of the machine in a longitudinal or a lateral direction, and means for turning said front wheels for steering, said means being operable to turn said front wheels in opposite directions to positions to propel said main frame laterally and to hold said front wheels in such positions, and including a lever arm connected with each of said front wheels for turning said wheels, a separate rod connected with each of said lever arms, a cylinder having said rods guided therein for extensible movement with respect thereto, a drag link for moving said cylinder laterally, fluid pressure means for positively holding said rods in a retracted position with respect to said cylinder to steer the machine when said cylinder is moved laterally by said drag link and for extending said rods from said cylinder and holding said rods in extended positions with respect to said cylinder, for moving said front wheels into and for holding said wheels in a laterally extended position with respect to said main frame.

10. In a face loadin machine of the class described, a main frame, front steering wheels for propelling said main frame in a longitudinal or a lateral direction, rear idler wheels for said main frame, said rear idler wheels being mounted for free movement about vertical axes to conform to the paths of said steering wheels during movement of the machine in a longitudinal or a lateral dierction, and means for turning said front wheels for steering, said means being operable to turn said front wheels to a position to propel said main frame laterally and to hold said front wheels in such a position, and including a lever arm connected with each of said front wheels for turning said Wheels, an extensible tie rod connected between said lever arms, for turning said front wheels to extend laterally of the machine by extension of said tie rod, said tie rod including a fluid pressure cylinder disposed intermediate said lever arms, a piston rod connected with each of said lever arms, said piston rods extending within opposite ends of said cylinder and having connection with separate pistons therein, and a port entering said cylinder intermediate the ends thereof, for admitting fluid under pressure to an intermediate portion thereof, to extend said piston rods from opposite ends thereof, and to hold said piston rods in an extended position with respect to said cylinder.

11. In a face loading machine of the class described, a main frame, front steering wheels for propelling said main frame in a longitudinal or a lateral direction, rear idler wheels for said main frame, said rear idler wheels being mounted for free movement about vertical axes to conform to the paths of said steering Wheels during movement of the machine in a longitudinal or a lateral direction, and means for turning said front wheels for steering, said means being operable to turn said front wheels to a position to propel said main frame laterally and to hold said front wheels in such a position, and including a lever arm connected with each of said front wheels for turning said wheels, an extensible tie rod connected between said lever arms, for turning said front wheels to extend laterally of the machine by extension of said tie rod, said tie rod including a fluid pressure cylinder disposed inter- V mediatesaid lever arms, a piston rod connected with each of said lever arms, said piston rods extending within opposite ends of said cylinder and having connection with separate pistons therein, a port in aid cylinder, for admitting fluid under pressure to an intermediate portion thereof to extend said piston rods from opposite ends thereof, and to hold said piston rods in an extended position with respect to said cylinder, ports in opposite ends of said cylinders to admit fluid under pressure therein to retract said piston rods within said cylinders and to hold said piston rods in a retracted position, and means for moving said cylinder laterally to eifect steering through said piston rods.

12. In a face loading apparatus particularly adapted to load loose material onto a shaker conveyer trough line and in combination with a swivel connected with the inlay end of a shaker conveyer trough line and having a reciprocating trough communicating therewith and mounted for lateral swinging movement with respect to said trough line, a stationary base, a wheel mounted face loading apparatus mounted for movement along the ground and including a frame with wheels for supporting said frame, said frame having said reciprocating trough slidably mounted thereon to extend between the rear supporting wheels for said frame, and means pivotally connecting said loading apparatus with said base, to cause said base to form a reaction means for said loading apparatus and to control lateral movement of said loading apparatus.

13. In a face loading apparatus particularly adapted to load loose material onto a shaker conveyer trough line and in combination with a swivel connected with the inby end of a shaker conveyer trough line, a stationary base for said swivel, a reciprocating trough communicating with and connected to said swivel for lateral movement with respect to said trough line, a face loading apparatus mounted for longitudinal movement and for lateral swinging movement with respect to said base and including a longitudinally extending conveyer having gathering devices at its receiving end, and having said reciprocating trough slidably mounted beneath said conveyer in material receiving relation with respect thereto, means pivotally connecting said loading apparatus to said base for movement with respect thereto about a vertical axis for causing aid loading apparatus to move laterally in a controlled path, and means permitting said loading apparatus to be extensibly or retractibly moved along said connecting means and reciprocating trough, and for holding said loading apparatus in fixed relation with respect to said swivel during loading, said means forming a guide means for holding said trough in material receiving relation with respect to said conveyer in all positions of movement of said loading apparatus with respect to said base.

14. In a loading apparatus particularly adapted to load loose material onto a shaker conveyer trough line having a swivel at its inby end, a stationary base for said swivel, a reciprocating trough extending from said swivel nd connected therewith for lateral movement with respect to said trough line, a face loading apparatus adapted to move longitudinally and laterally with respect to said swivel and including a main frame, wheels for supporting said frame, a longitudinally extensible endless conveyer extending along said main frame, gathering devices at the receiving end of said conveyer, for picking up material from the ground and loading it onto said conveyer, said reciprocatingtrough beingslidably guided in said main-frame, between the wheel thereof, and means extensibly connectedwith said loading Vapparatus and pivotally connected with said 'base for'controlling lateral swing'ingmovement of said loading apparatus and for permitting said loading apparatus to be extensibly or retractibly moved with respect tosaid reciprocating trough, said means dorming :a longitudinal guide means for said reciprocating trough.

15. Ina-loading apparatus particularlyadapted to load loosematerial onto a a shaker conveyer trough line-havinga swivel at itslinby end, a stationary basefor said swivel a reciprocating troughextending from said swivel andconnected therewith for lateral movement with :respect to said trough line, :a wheelmounted face loading apparatus including -a main frame-front traction and steering wheels formoving said loadingapparatus in a longitudinal or alateral direction with respect to a workingwplaca-adongitudin'ally ilextensibl'e co-nveyer extending along said main frame, gathering devices for picking up material from the ground-andlloading it onto the receiving end of said conveyer, means for mounting said reciprocating trough on said main frame, for .slidablemovementbeneath the discharge end of said conveyer andfor holding said reciprocating trough in receiving relation with respect to said conveyer in all positions I of said oading apparatus with respect L130 said iswivl,

'edtoloadloosematerial onto ashaker conveyer troughline having'aswivel at its inby end, a stationary .lbase for said swivel, a reciprocating "trough connected therewith for lateral movement with respect to *sa'id'trough line, a wheel mounted face loading apparatus including :a'

mainframe, front traction and steeringwheels for moving said loading apparatus and main frame in a longitudinal or a lateral direction with respect to a working place, and a longitudinally extensible conveyer extending along said main frame, gathering devices at the receiving end of said conveyer for picking up material from the ground and loading it onto said conveyer, means for positively extending said conveyer by power to feed said gathering devices into the material it is desired to load, means for mounting said reciprocating trough for slidable movement beneath the discharge end of said conveyer and for supporting said reciprocating trough in receiving relation with respect to said conveyer in all positions of said loading apparatus with respect to said swivel, said means extending along said reciprocating trough and having vertical pivotal connection with said base, for controlling lateral movement of said loading apparatus, said means also forming a reaction means for said loading apparatus for holding said loading apparatus from backward movement during extension of said conveyer and gatheringdevices into the material it is desired to'load.

.17. "In aloadingapparatu's particularly adap'ted to loa'dloose material -onto "a shaker conveyer trough line having a""swivel"at its 'inby *en'd,-"a stationarybase for said swivel, a reciprocating trough extending from .saidswivel andcon'nected therewith for lateral movement with respect 'to saidtrou'gh line 'about the axis of said swivelya wheel mounted face loadingapparatus including amain framaf'fronttraction and steering wheels for moving said loading apparatus and fmain frame in a longitudinal or a lateral direction with respect to .aworking place; and a longitudinally extensible ic'onveyer extending along said main framaogather'ing devices at the receiving end of said :conveyer for picking up 'materi'al from the ground and loading I itonto said conveyer, means for ipositively extending said conveyer by power to feed said gathering devicesinto the materialgit .is -,desired (to load, means for mounting-said reciprocating trough for slidable movement beneath the discharge endotsaid conveyer and for supporting said reciprocating trough in receiving relation *with respect -to=said conveyer in-all positions of said loading apparatus with rospect to said swivel, said means extendingalong:saidreciprocating:troughandhaving vertical gpivotal connection with said base for controlling lateral :movement of said loading apparatus, said "means also forming :-a :reaction means :for said loading apparatus for holding said loading apparatus :from backward movie ment during extension or "said conveyer and gathering :devices into "the a material it is desired to load, :and .ameans controllable at the "will "of the 'ioperator for holding said :loading apparatus in fixed relation with (respect "to :said means or for permitting: said i-loading apparatus ito -exten- J siblyrmove along said means.

vey'er extending along said main frame {beyond the forward end thereof, gathering devices at the for-wardend or said conveyer "for .picking u'p loose material from the ground and moving it 'ont'osai'd conveyer, power means for extending said conveyer for feeding said gathering device's into-the materi-alfitis desirdtblo'adJa -bas'eiplate spaced -rearwardly of 'sai'd main frame and adapted to be anchored to the ground and held from movement with respect thereto, said wheels having lever arms interconnected by tie rod means which is bodily shiftable transversely of the machine, steering means operatively connected with the wheels and tie rod assembly for swinging the wheels concurrently in the same direction, means for varying the length of said tie rod means between a first length to dispose the wheels substantially parallel to oneanother for steering during tramming and a second length to dispose said wheels for rotation about axes extending in the direction of said base plate, means pivotally connecting said base plate with said main frame for holding said loading machine from backward movement during extension of said conveyer and gathering devices into the material it is desired to load and forming a means for controlling movement of said loading machine when propelled in a lateral direction about said base plate by said wheels.

19. In a face loading apparatus of the class de- 19 scribed, a conveyer adapted to extend into the working place of a mine, a stationary base, a wheel mounted face loading apparatus mounted for lateral movement with respect to said base and including a frame with wheels for supporting and propelling said frame in a forward or a lateral direction, a longitudinally extending endless conveyer having gathering devices at its receiving end, a slidable connection between said first conveyer and said frame, slidably connecting said first conveyer to said frame in material receiving relation with respect to said second conveyer, and a pivotal connection between said frame and said base adapted to hold said loading apparatus for lateral movement about said base in a controlled path, and forming a reaction means for said loading apparatus, during crowding of said gathering devices into the material it is desired to load, by extension of said second conveyer.

20. In a face loading apparatus of the class described, a conveyer adapted to extend into the working place of a mine and having a laterally movable receiving end, a stationary base, a face loading apparatus straddling said laterally movable receiving end of said conveyer and including a frame with wheels for supporting and steering said frame, a longitudinally extensible conveyer extending along said frame beyond the forward end thereof and having gathering devices at its receiving end, a slidable connection between said frame and the receiving end of said first conveyer, slidably guiding said first conveyer in material receiving relation with respect to said second conveyer, and said slidable connection between said frame and said first conveyer including a link vertically pivoted to said base and adapted to hold said loading apparatus for lateral movement about said base in a controlled path, and with said base forming a reaction means for said loading apparatus during crowding of said gathering devices into the material it is desired to load, by extension of said second conveyer.

21. In a face loading apparatus of the class described, a conveyer adapted to extend into the working place of a mine and having a laterally movable receiving end, a stationary base, a face loading apparatus straddling said laterally movable receiving end of said conveyer and including a frame with wheels for supporting and steering said frame, a longitudinally extensible conveyer extending along said frame beyond the forward end thereof and having gathering devices at 1 20 its receiving end, a slidable connection between said frame and the receiving end of said first conveyer, slidably guiding said first conveyer in material receiving relation with respect to said second conveyer, said slidable connection between said frame and said first conveyer including a link vertically pivoted to said base and adapted to hold said loading apparatus for lateral movement about said base in a controlled path, and an extensible connection between said loading apparatus and said frame, permitting movement of said loading apparatus along said frame and said first conveyer, said extensible connection including yieldable connective means adapted to hold said loading apparatus to said frame during normal gathering operation of said apparatus, whereby said frame, link and base form reaction means for said loading apparatus during crowding of said gathering devices into the material it is desired to load, by extension of said second conveyer.

ROY S. BIGELOW.

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

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