US1277214A - Shoveling or mucking machine. - Google Patents

Description

M. T. HOSTE R. SHOVELING OR MUCKINGIMACHINE. APPLICATION FILED wL'Y 25.1917.

Patented Aug. 27, 1918*.

4 SHEETS-SHEET I.

MAN/W50 THOSTE/i ATTORNEY M. T. HOSTER.

' SHOVELING 0R MUCKING MACHINE.

APPLICATION FILED JULY 25.19Il.

Patented Aug. 27, 1918.

4 SHEETS-SHE ET 3.

Mr F. %M Hm I H mm M M /y/ O/f/ZW MIT. HOSTER.

SHQVELING OR MUCKING MACHINE.

APPLICATION FILED I ULY 25 I917.

Patented Aug. 27, 1918..

4 SHEETS-SHEET 4.

WITNESSES I aw/1M.

MANFRED '1. HOSTER, OF ST. PETERS, PENNSYLVLA.

SHOVELING 0R MUCKING- MACHINE.

Specification-of Letters Patent.

Patented Aug. 2'2, 1918 Continuation of application Serial No. 878,601, filed December 22, 1914. This application filed July 25, 1917. Serial No. 182,808.

scribed in the Letters Patent of the United States, No. 1,100,241, granted to me on June 16, 1914.

The main object of the present invention is to provide a new and improved shoveling or mucking machine arranged to shovel up loose material in front of the machine and transfer it rearwardly overhead of the machine intoa car or receptacle stationed at the rear of the machine. Another object is to simplify the construction and operation of the machine relative to the one disclosed in my previous patent above referred to.

In order to obtain these results use is made of a main truck temporarily fastened in position and provided with a forwardly and backwardly movable part adapted to force a bucket into the bottom portion of.

the loose material to be shoveled, the bucket being mounted to swing on a transferring arm pivoted on the movable truck part, and means for imparting an up and down swinging motion to the bucket to scoop up the loose material and to engage the filled bucket with the transferring arm and to then swing the latter rearwardly with the filled bucket until the latter reaches a dumping posltion at a point beyond the rear end of the machine. p I

A practical embodiment of the-invention is represented in the accompanying drawings for'ming a part of thisspecification, in which similarcharacters ofreference indicate corresponding parts in all the views.

Figural is a side elevation ofthe shoveling Jor [mucking machine with the bucket pushed, ifritolthe bottom, of a pile, oflooSQ m er al o be h0v d;.. I, a I

meat gp an view ofitlie ame;

Fig. 3 is a side elevation of the same with the bucket in dumping position;

Fig. lis a front end view of the'same;

Fig. 5 is a cross section of the same on the line 55 of Fig. 1;

Fig. 6 is an enlarged sectional side eleva tlon of the valves for controlling the fluid pressure to the hoisting machine and the actuating device for the movable member of the car truck; and

Fig. 7 is a side elevation of a modified form of the counterbalancing and returning means.

The mucking or shoveling machine is mainly intended for use in narrow and low drifts and tunnels in the heading of which holes have been drilled by pneumatic drills for the reception of dynamite or other explosives which when exploded loosen the heading material and cause it to drop in a pile on the bottom of the drift or tunnel. The loose material is scooped up and is transferred economically to the rear of the machine into a car or other receptacle by the use of the machine presently described in detail.

The truck A of the shoveling or mucking machine is adapted to run on rails B extending to or under the bottom of the pile of loose material C to be shoveled up and transferred by a bucket D to a car E or other receptacle located in the rear of the shoveling or mucking machine, the car E being likewise mounted to run on the rails B, as indi- 'cated in Figs. 1 and 3. The truck A is made in two parts A and A of which the main truck part A is fastened in place during the mucking or shoveling operation, and the other part A is mounted to slide forward and backward on the main part A for pushing the bucket D forward into the pile of loose material and for assisting in the transfer of the filled bucket from forward to rearward dumping position, as hereinafter more .fully explained. The main truck part A is formed of two spaced and longitudinally extending side beams A, preferably made of channel iron, and mounted at the rear on an axle A carrying wheels A traveling on the rails B. The slidable truck part A is formed of two spaced and lengthwise extendingside beams A, preferably made of chanwith the rails B, as indicated in Figs. 1 and 3.

rarily fastened to props G nel iron, and mounted to slide on the side beams A, as will be readily understood by reference to Fig. 5. The front ends of the side beams A extend beyond the front ends of the side beams A and are rigidly connected with each other at this point by a cross beam A and the said front ends of the side beams A are adapted to engage the bottom of the bucket-D to push the latter into the pile of loose material, as shown in Fig. 1. The forward portions of the side beams A are mounted on an axle A carrying wheels A adapted to travel on the rails B, and the said side beams A support a platform A. When the movable truck part A is in rearmost position on the main truck part A, as shown in Fig. 3, themachine can be readily run on the rails B to the place of operation, and then the main truck part A is locked in place by a suitable clamping device F connecting the said truck part A .The forward portion of the truck part A is supported on a cross bar G removably held in brackets G secured to the side beams A The cross bar G extends beyond the sides of the truck A and its ends are tempo- (see Figs. 2 and 5) resting on the ground. Each prop Gr is preferably provided with a vertical row of apertures G3 and a pin G is driven through an aperture in the corresponding end of the cross bar G and through an aperture Gr in register at the time with the aperture in the end of the cross bar G. By the use of the clamping device F the main truck part A is temporarily held against movement between the loose material C and the car E, while the truck part A is free to slide forward and backward on the truck part A. By the use of the cross bar G, the props G and the pins Gr the truck A is held against tipping over sidewise. The wheels A traveling on the track B insure an easy forward and backward movement of the slidable truck part A. By telescoping the side beams A and A an exceedingly strong and durable truck is provided.

The loose material C in front of the movable truck part A is scooped up by the bucket D which is provided at the sides with upwardly extending arms D attached to a transverse shaft D journaled on a transferring arm H formed of two side pieces secured to a transverse shaft H journaled in suitable bearings H held on top of a turntable I mounted on the top of the platform A of the movable truck part A. The turntable I is connected by a pivot or king pin I with the platform A". By the arrangement described, the bucket D, the transferring arm H and the turntable I move bodily with the movable truck part A". The side pieces of the transferring arm H are spaced apart a distance corresponding approximately to the width of the bucket D to allow the open end of the bucket D to enter between the outer ends of the said side pieces. This motion of the bucket is arrested by the sides of the bucket abutting against lugs H on the inner faces of the side pieces of the transferring arm H, as will be readily understood by reference to Figs. 1 and 3.

To the sides of the bucket D are secured the ends of ropes, cables, chains or like flexible connections J extending upwardly and passing over pulleys J j ournaled on the free ends of the side beams of the transferring arm H at the outer faces thereof to allow the bucket D to readily pass between the side arms of the transferring arm Gr, as previously mentioned. The flexible connections J after passing over the pulleys J extend rearwardly and downwardly and wind on drums K of a reversible hoisting machine or windless K mounted on the rear portion of the turntable I. The hoisting machine K may be of any approved construction, pref-- erably, however, one driven by compressed air to permit of utilizing the same source of compressed air used for actuating the drills. The bucket D when in lowermost position has its open end' facing the pile of loose material and has its bottom abutting the front ends of the side beams A of the movable truck part A so that when the latter is moved forward, it pushes the bucket D forward into thepile of loose material C, as shown in Fig. 1. The front ends of the side beams A are preferably beveled upwardly and forwardly and the bottom of the bucket D is correspondingly beveled to prevent the bucket D from swinging upward on pushing it forward. In order to facilitate the entrance of the bucket D into the loose material the then underside of the bucket D has its forward edge provided with forwardly projecting teeth D- After the bucket D has entered the pile of loose material C the Windlass K is started to wind up the flexible connections J whereby the latter impart an upward scooping motion to the bucket D for the latter to scoop up the loose material. The filled and upwardly swinging bucket D finally passes with its open mouth between the outer ends of the side beams of the transferring arm H and engages the stop lugs H so that on further winding up of the flexible connections J a rearward swinging motion is given to the transferring arm H to carry the filled bucket D rearward overhead of the machine.

In order to counterbalance the transferring arm H and the filled bucket D after the transferring arm has passed a vertical position in its rearward movement, use is made of a counterbalancing means, which may be in the form of weights L, as shown in Figs.

1, 2, 3 and 4, or in the form of a spring, as shown in Fig. 7. The weights L of the counterbalancing means normally rest on the front end of the turntable I and form a support for the transferring arm H at the time the latter is in forward position. For the purpose mentioned the side pieces of the transferring, arm H are provided with a cross bar H adapted to rest on the uppei ends of the weights L. The weights L are r ing a swinging motion to the extension arms 'L and the arms L of the weights L so that the latter are lifted off the turntable I and counterbalance the transferring arm H and the filled bucket D during the time the arm H swings from the vertical position into final rearmost position for the bucket D to proximately vertical position.

dump its contents into the car E.

In the modified form shown in Fig. 7, the cross bar H of the transferring arm H is adapted to rest on supports N and a spring N is secured at one end to the turntable I and the other end of the spring N is attached to a forwardly extending arm N mounted to swing loosely on the shaft H. The arm N is adjustably connected by a rod N with an upwardly extending arm N fnlcrumed loosely on the shaft H and adapted to be engaged by the cross bar H of the transferring arm H at the time the latter passes a vertical position in its rearward swinging movement, as previously explained relative to the cross bar H engaging the extension arms L By adjusting the rod N the arms N and N can be adjusted one relative to the other to engage the arm H* sooner or later with the arm N at the time the transferring arm H moves into an ap- The spring N is gradually placed under tension during the final rearward movement of the transferring arm H and it reaches its maximum tension at the time the transferring arm H.

reaches its rearmost position, that is, at the time the bucket D is in dumping position.

In order to prevent the loose material from falling out of the bucket D during the latters movement into dumping position,

use isma'de of a cover 0 extending across.

the side pieces of the transferring arm H in frontof the lower portion of the mouth of the bucket D. The cover 0 is provided with a transverse pivot O journaled on the side pieces of the transferring arm H and. one

end of the ivot O is provided with an arm 0 adapted to engage a spring-pressed locking and retaining catch 0 under the control of the operator and fulcrumed on one of the side pieces of the transferring arm H. A handled cord O is attached to the catch 0 to permit the operator to conveniently disengage the catch 0 from the arm 0 at the time the bucket D reaches its dun1ping position (see Fig. 3) to allow the cover 0 to swing into an open position. Adjacent the pivoted end of the cover 0 is arranged a cross board H connecting the side pieces by the operator releasing the catch N and allowing the cover to swing into open position by its own gravity and aided by the loose material pressing against the cover 0. The opening movement of the cover 0 is limited by the arm 0 striking against a stop pin O on the corresponding side piece of the transferring arm H, as will be readily v understood by reference to Fig. 3.

In order to impart a forward and backward sliding movement to the truck part A the following arrangement is made: Between the side beams A is arranged a longitudinally extending cylinder 1 closed at both ends and provided at or near its middle with trunnions P journaled on the said side beams A In the cylinder P is mounted to reciprocate a piston P having a piston rod P extending through the forward head of the cylinder P. The outer end of the piston rod P is attached to the cross beam A of the slidable truck part A so that when the piston P reciprocates in the cylinder P then a forward and backward sliding movement is given to the truck part A By hanging the cylinder P on trunnions I the cylinder is free to rock thus preventing any possible bending of the piston rod and injury to the cylinder during the forward and backward movement of the truck part A In order to impart a reciprocating motion to the piston P use is made of the same source of compressed air that is used for opcrating the Windlass K and for this purpose the heads of the cylinder P are connected by flexible tubes Q and Q. with a four-way.

valve Q under the control of the operator and which air supply tube S is also used for.

supplying the drills with compressed air as t e motive agent. The pipe R is also canreservoir or air compressor. (not shown) nected by a branch pipe K with the windlass K to supply the latter with compressed air as the motive agent, and the said branch pipe K is provided with a valve K under the control of the operator for governing the Windlass K.

In order to impart a turning motion to the turntable I the king bolt 1 thereof is provided with a segmental gear wheel I in mesh with a segmental gear wheel I having its shaft. '1 journaled on the platform A of the movable truck part A The shaft I extends upwardly through a slot I in the turntable I and the upper end of the said shaft I is made polygonal for the application of a removable handle (not shown) under the control of the operator standing alongside the machine to permit the operator to swing the turntable I and the parts carried thereby to the left or to the right (see dotted lines in Fig. 2) whenever it is desired to scoop up the loose material at the corners of the pile.

The operation is as follows:

When the machine has been run close up to the pile of loose material and with the slidable truck section A in rearmost position on the truck section A then the latter is fastened in place by the clamping device F, the cross bar G, props Gr and pins G. The tube S is next coupled to the pipe R and then the operator opens the normally closed valve Q to admit compressed air by way of the tube Q into the rear end of the cylinder P to push the piston P forward. The piston P in its forward movement slides the truck part A forwardly whereby the bucket D, now in lowermost position, is pushed forward into the pile of loose material C. The operator now closes the valve Q and opens the normally closed valve K to start the windlass K with a view to wind up the flexible connections J on the drums K. The flexible connections J exert a pull on the bucket D so that the latter is caused to swing upwardly and forwardly thus scoo ing up the loose material C and filling t e bucket D,.which latter eventually reaches the transferring arm H and enters with its open mouth between the side beams of the said transferring arm H. The bucket D comes to a stop as soon as the sides of the bucket butt against the stop lugs H The operator may now momentarily close the valve K and reverse the valve Q to admit compressed air into the forward end of the cylinder P to start the piston P rearwardly thus moving the truck section A the transferring arm H and the filled bucket D rearwardly. During the return movement of the piston P the rear end of the cylinder P is connected by the tube Q and valve Q with the atmosphere to allow escape of the air from the rear end of the cylinder P.

When the truck section A has been returned to rearmost position, or during this return movement, the operator opens the valve K to again start the Windlass K to wind up the flexible connections J still further on the drums K so that a rearward swinging motion is given to the transferring arm H owing to the bucket D being held against the stop lugs H When the transferring arm H passes a vertical position in its rearward swinging motion the cross bar H engages the arms L (or the arm N, Fig. 7) thus lifting the weight L (or placing the spring N under tension). The winding up operation of the flexible connections J is continued until the transferring arm H reaches the dumping position shown in Fig. 3. The valves K and Q are closed to stop the windlass K and the rearward movement of the truck section A. The operator next releases the spring catch 0 to allow the cover 0 to swing into open position. The loose material in the bucket D now rolls or slides down over the chute H and cover 0 and drops into the car E. When the material has been dumped the operator opens the valve K and reverses the windlass K to allow the flexible connections J to unwind. The counterbalancing weight L (or spring N) now swings the transferring arm H forwardly and downwardly until it comes to a rest on the weight L. Further unwinding of the flexible .connections J allows the bucket D to swing downward into lowermost position immediately in front of the truck section A The valve K is now closed. When the transferring arm H has returned to normal forward position the cover 0 is swung back by the operator onto the side pieces of the transferring arm H and is locked automatically in this position by the arm 0 reengaging the spring catch 0 The valve Q is now again turned to admit compressed air into the rear end of the cylinder P and to allow the air in the front end of the said cylinder to escape to the atmosphere by way of the tube Q and valve Q The truck section A now again slides forward and pushes the bucket D into the pile of loose material C, and the above described operation is repeated.

It is understood that after the filled bucket D has been swung up into position on the outer end of the transferring arm H the operator may cause the truck section A and the transferring arm H to move simultaneously rearward or successively by manipulatilng the valves Q and K correspondm y.

The forward and backwardmovement of the truck section A is increased after each shoveling operation and occasionally the turntable I is swung to the ri ht or left for the bucket D to scoop up the oose material at the corners of the pile of loose material C. When the truck part A after repeated operations has finally reached the end of its forward movement on the truck part A and there isstill some loose material left in front of the machine to be shoveled then the truck part A is unfastened and run forward on the rails B to the extent of the full movement of the truck part A on the truck part A and then the latter is again fastened in place and the above described operation is repeated.

If the operator of the machine finds that the bucket D has not penetrated into the pile the desired distance for any reason whatever, or the bucket can not be swung upward, then the operator causes the movable truck part A and thebucket D to return to starting position and then causes the said part A to again move forward and with it the bucket D to push the latter'the desired distance into the pile of loose material C. In case the bucket D is but partly filled during a scooping operation the operator returns the part A and the bucket D instead of being swung upward to position on the transferring arm H is returned to lowermost position after which the part A is again moved forward and with it the bucket D topush the latter again into the pile of loose material. The bucket D is next subjected to a secondscooping operation to fill the bucket, and the filled bucket is then swung up into position on the transferring arm H to be then moved rearward into dumping position.

Although the machine is primarily designed for shoveling ore and coal in narrow and low mines it is evident that it can also be successfully employed in the open, or in subways, tunnels and like places for scooping up loose material in front of the machine and transferring it overhead into a car or other receptacle located in the rear of the machine.

From the foregoing it will be noticed that the Windlass K is utilized for imparting an upward swinging motion to the bucket D until the latter engages the transferring arm H and to then impart a rearward swinging motion to the transferring arm with a view to carry the bucket D into an upside down or dumping position. The Windlass K is also used in conjunction with the counterbalancing means to return the transferring arm and the bucket to normal forward position. It will'also be noticed that the Windlass K and the cylinder P and its piston operate conjointly to cause the movable part A to slide rearwardly and to carry the transferring arm H and the bucket D held there on bodily in a rearward direction so that the bucket D, when it reaches the dumping position, is located at a point beyond the rear end of the truck A to allow the contents of the bucket D to drop into the car E.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A shoveling machine of the character described, comprising a truck having two main parts each provided with wheels adapted to travel ontrack rails, one of the truck parts being held temporarily fixed during the shoveling operation and the other part having its frame mounted to slide forward and backward on the frame of the fixed truck part, actuating means for imparting a forward and backward movement to the said movable part, a bucket adapted to be engaged by the forward end of the said movable truck part to push the bucket forward in a straight line, into the material to be shoveled, means for subsequently imparting a forward and upward swinging motion to the said bucket for the latter to scoop up the material, and carrying means adapted to carry the said bucket from a filled and raised position rearwardly overhead of the machine into an upside down dumping position.

2. A shoveling machine of the character described, comprising a truck having two main parts each provided with wheels adapted to travel on track rails, one of the truck parts being held temporarily fixed during the shoveling operation and the other part having its frame slidable forward and backward on the frame of the fixed truck part, actuating means for imparting a forward and backward movement to the said movable part, a bucket adapted to be engaged by the forward end of the said movable truck part to push the bucket forward in a straight line into the material to be shoveled, means for subsequently imparting a forward and upward swinging motion to the said bucket for the latter to scoop up the material, carrying means mounted on the said movable part and adapted to carry the said bucket from a filled and raised position rearwardly overhead of the machine into an upside down dumping position, the said movable part and the said carrying means operating conjointly to position the bucket at 'a point beyond the rear of the machine at the time the bucket reaches a dumping position.

3. A shoveling machine of the character described provided with a truck having two parts each provided with wheels adapted to travel on track rails, one of the truck parts being held fixed during the shoveling operation and the other truck part having its frame slidable forward and backward on the frame of the fixed truck part, actuating means for moving the said movable part forward and backward, and a bucket in front of the said movable part adapted to be pushed forward by the same into the material to be shoveled.

4:. A shoveling machine of the character described provided with a truck having two y direction and the bottom of the bucket being correspondingly beveled to hold the bucket against upward movement while being pushed into the material.

5. In a shoveling machine of the character described, a truck having two parts each provided with wheels and of which one part is held fixed during the shoveling operation and the other part has its frame mounted to slide forward and backward on the frame of the fixed truck part, actuating means for moving the said movable part forward and backward, a transferring arm mounted to swing and to travel bodily with the said movable truck part, a bucket mounted to swing on the said transferring arm and adapted to be engaged by the front end of the said movable truck part to push the bucket straight ahead into the material to be shoveled, and means for imparting a swinging motion to the bucket to engage the latter with the said transferring arm and to subsequently impart a rearward swinging motion to the said transferring arm to carry the filled bucket overhead of the machine into a dumping position at a point beyond the rear of the machine. I I

6. In a shoveling machine of the character described, a truck having two parts each provided with wheels and of which one part is held stationary during the shoveling operation and'the other truck part has its frame mounted to slide forward and backward on the frame of the fixed truck part, actuating means mounted on the said fixed truck part and connected with the said movable truck part to move the latter forward and back ward, a bucket adapted to be pushed by the said movable truck part straight ahead into the material to be shoveled, transferring means mounted on the said movable truck part and moving bodily with'the same, the said bucket being mounted to swing on the transferring means, and actuating means mounted on the said fixed truck part and connected with the said bucket and the said transferring means to swing the bucket into engagement with the transferring means and to su sequently move the transferring means and the bucket rearwardly overhead of the machine until the bucket reaches a dumping position at a point beyond the'rear of the machine.

7. A shoveling machine of the character described, comprising a truck having two parts, of which one is held fixed during the shoveling operation and the other part is mounted to slide forward and backward on the said fixed part, a bucket, a transferring arm mounted to swing on the said movable wart, means for imparting an upward swingmg motion to the said bucket to engage the bucket with the said transferring arm and to then impart a rearward swinging motion to the said transferring arm overhead of the machine, to carry the said bucket into dumping position at a point beyond the rear of the machine.

8. A shoveling machine of the character described provided with a bucket, a transferring means on which the bucket is mounted to swing, and an actuating means connected with the said bucket and the said t1 ansferring means for imparting an upward swinging motion to the said bucket to engage the latter with the said transferring means and to subsequently impart a rearward motion to the said transferring means to carry the said bucket overhead the machine into dumping position at a point beyond the rear of the machine.

9. A shoveling machine of the character described, comprising a transferring arm mounted to swing from a forward position rearwardly beyond a vertical position, a bucket mounted to swing on the said transferring arm and adapted to engage the same, a pulley journaled on the said transferring arm, and a windlass having a flexible connection extending over the said pulley and fastened to the said bucket to swing the latter upward into engagement with the transferring arm and to then impart a swinging motion to the said transferring arm.

10. A shoveling machine of the characterdescribed, comprising a transferring arm mounted to swing from a forward position rearwardly beyond a vertical position, a bucket mounted to swing on the said transferring arm and adapted to engage a pulley journaled in the said transferring arm, a windlass having a flexible connection extending over the said pulley and fastened to the said bucket to swing the latter upward in engagement with the transferring arm and to then impart a swinging motion I to the said transferring arm, and a counterbalancing device adapted to be engaged by the said transferring arm at the time the latter reaches an approximately sition to counterbalance the transferring vertical poarm and the bucket during the final rearward swinging motion and to impart a forward swinging motion to the said transferring arm, a 1:

11. In a shoveling machine of the character described, a transferring arm mounted to swing from a forward position rearwardly beyond a vertical position, a bucket engaging with its open mouth the said transferring arm, and a cover mounted to swing on the said transferring arm and adapted to close the mouth of the bucket during the rearward movement of the said transferring arm and bucket, and adapted to swing into open position to form a chute for guiding the material dumped by the bucket into a receptacle at the rear end of the machine.

12. In a shoveling machine of the character described, a transferring arm mounted to swing from a forward Position rearwardly beyond a vertical position, a bucket engaging with its open mouth the said transferring arm, a cover mounted to swing on the said transferring arm and adapted to close the mouth of the bucket during the rearward movement of the said transferring arm and bucket and adapted to swing into open position to form a chute for guiding the material dumped by the bucket into a receptacle at the rear end of the machine, and a manually controlled locking and releasing device mounted on the said transferring arm and adapted to lock to release the said cover.

13. A shoveling machine of the character described provided with a pivoted transferring arm having side pieces, a bucket mounted on the said transferring arm and adapted to pass with its open month between the said side pieces, a cover pivoted on the said side pieces and adapted to form a closure for the said bucket, an arm on the pivot of the said cover, a locking and releasing device for the said arm to hold the cover in locked position and to allow of releasing the cover, and means adapted to be engaged by the said arm to limit the opening movement of the cover for the latter to form a chute for material dumped by the said bucket.

14. A shoveling machine of the character described provided with a pivoted transferring arm having side pieces, a bucket mounted on the said transferring arm and adapted to pass with its open mouth between the said side pieces, a cover pivoted on the said side pieces and adapted to form a closure for the said bucket, an arm on the pivot of the said cover, a locking and releasing device for the said arm to hold the cover in locked position and to allow of releasing the cover, means adapted to be en gaged by the said arm to limit the opening movement of the cover for the latter to form a chute for material dumped by the said bucket, and a chute connecting the said side pieces with each other adjacent the pivoted end of the said cover to form a connecting chute between the mouth of the bucket and the said cover at the time the cover is in: open position.

15. A shoveling machine of the character described provided with a track having a main part and a slidable part, the said truck parts having side beams slidable lengthwise one on the other, wheels for each truck part and adapted to travel on track rails, a cylinder pivoted on the said main truck part and having a piston connected with the said slidable truck part, and means connected with the said cylinder for admitting fluid pressure alternately into the ends of the said cylinder to move the said piston and the said slidable truck part forward and backward. 7

16. A shoveling machine of the character described provided with a truck having a main part and a slidable part, the said truck parts having side beams slidable lengthwise one on the other, wheels for each truck part and adapted to travel on track rails, a cylinder pivoted on-the said main truck part and having a piston connected with the said slidable truck part, means connected with the said cylinder for admitting fluid pressure alternately into the ends of the said cylinder to move the said piston and the said slidable truck part forward and backward, a pivoted transferring arm carried by the said slidable truck part, a bucket mounted to swing on the said transferring arm, a pulley on the said transferring arm, and a Windlass carried by the slid-able truck part and having a cable connected with the said bucket and extending over the said pulley.

17. A shoveling machine of the character described, comprising a truck having two parts each provided with wheels adapted to travel on track rails, one of the truck parts being held temporarily stationary during the shoveling operation and the other truck part having its frame slidable forward and backward on the frame of the fixed truck part, actuating means for imparting a forward and bagkward movement to the said movable part, and a bucket adapted to move forward and backward with the said movable truck part.

18. A shoveling machine of the character described, comprising a truck having two parts each provided with wheels adapted to travel on track rails, one of the truck parts being held temporarily stationary during the shoveling operation and the other truck part having its frame slidable forward and backward on the frame of the fixed truck part, actuating means for imparting a forward and backward movement to the said movable part, a bucket adapted to move forward and backward with the said movable truck part, and means for imparting a scooping motion to the said bucket after the latter has been pushed into a pile of loose material.

19. A shoveling machine of the character described, comprising a truck having two parts each provided with wheels adapted to travel on track rails, one of the truck parts being held temporarily stationary during the shoveling operation and the other truck part having its frame slidable forward and backward on the frame of the other truck part, actuating means for imparting a forward and backward movement to the said movable part, a bucket adapted to move forward and backward with thesaid movable truck part, and means for imparting an upward scooping motion and a subsequent downward return motion to the said bucket to return the latter to starting position.

In testimony whereof I affix my signature.

MANFRED T. HOSTER.

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