US1441700A - Loading machine - Google Patents

Description

B. A. MIDDLEIVIISS.

Jan. 9, 1923u LOADING MACHINE.

man 1AN.1B.1917.

B.. A. IVIIDDLENIISS.

LOADING MACHINE.

FILED 1AN.18,1911.

Jan. 9,1923..

2 SHEETS-SHEET 2.

Patented an 9, 1923,".

PATENT ori-fica.-

BR''CE A. MIDDLEMISS, 0F HIIBBING, MIINESO'LAy ASSIGNOR T0 MIDDLEMISS AND BRACKETT, 0F MILWAUKEE, .WTJISG( I 1\TSI'.l\T, A' COPABTNERSHIP COMPOSED OF BRUCE A. MDDLEMISS AND JOHN C. BRACKETT.

manine MACHINE. 'i

This invention relates to loading machines designed'to shovel loose material into cars or other receiving apparatus.

lin so far as I ani informed, allI loading" machines have been modifications of the steam shovel, dredge, and heavy loading nia'- chine types, designed to effect a relatively slow movement of the load carrying element, followed by a relatively slow movement to deliver material. This slowness is caused by the relatively large quantities which it has been the customto handle in each opera- A tion. While these types have surface and unrestricted underground excavations, their size and weight has precluded their use in underground workings wheretheir space is limited. 1t has been possible to use' existing machines underground only by adapting the size of the drifts and the radii of turnouts to suit the machine. In bad ground this is impracticable.

My invention has for its general object to produce a compact, light machine overcoming these objections, working on the principles, first, of handling small quantitiesper cycle, second, of attacking materials with a light element, given high kinetic energy by the power and quickness of its thrust, third, of transferring sm'all individual loads by fast and relatively very powerful means, l

giving a very rapid speed of transfer. This combination with automatlcmeans for continuous operation, furnishes a machine of unique usefulness in underground mining, where it is necessary to handle quickly detached masses of material, individually small, but of enormous aggregate tonnage.

In carrying out my invent-ion l make use preferably .of a peculiarly designed two surfaced shovel, onev face being adapted to receive and the other to transfer the' load, l

been standard for Application led January 15, 1917. Serial No. 143,116.

also prefer to terminate the transfer stroke suddenly, by the action of a yielding element, the recoil of which may be used to assist. reversal of the mechanism. Preferably in securing high shovel energy, I mount the shovel directly on .a powerful reciprocating element. In the particular machine illustrated, this reciprocating element is further utilized asa transferring means.

It is obvious that the common type of drop bottom bucket may be employed, that a' conveying apparatus may be added to the' transferring means, that motors of the rotary type may bejsubstituted for the pistons i shown, and that, if required for heavy' Work,

an auxiliaryscraper maybe employed to.

carry material into reach of the shovel. The type shown is designed for certain conditions, and to meet conditions in other mining districts any or all of the obvious modifications of design may be added without affecting the essentials of the invention.

ln lthe accompanying sheets of drawings wherein l have shown one embodiment of my inventionwliich operates with high effif ciency,l"ig. 1 is a side viewof the machine,

the parts being shownv in full lines with the shovel approximately at the end of its outward or material receiving stroke, and by dotted linesin other different positions; Fig. 2 is a top plan 'view of the sanie;-Fig. 3 is an enlarged transverse sectional view substantially along the line 3-3 of Fig. 1; and Fig. 4 is a detail view of the valve mechanism, this view being taken fromthe line lr-4 looking in the direction indicated by the arrows. f

rllhe machine here illustrated and described, and embodying my invention includes a base'lO, which is designed to be held stationary during the loading operation and tobe moved forwardly in any desired manner as the material in front of the machine is loaded into a car, a portion of which is indicated at 11 in Fig. 2 at the rear of the machine, or in any other suitable material receiving lelement.'l The material is loaded, that is to say, it is scooped up from apoint in front of the machine, and is then elevated and moved rearwardly over the machine and discharged into the receiving ele- `received as the shovel. is moved forwardly into the material and is open at its upper end so that material can be discharged from the bucket at tlie rear of the machine.

ing unit and which preferably. consists of Tlie'bucket is given tli'e'nioveinentsA necessary for this purpose by a single motor or motive device which is a part of the swing- I a reciprocating air or other fluid pressure motor having a Acylinder 13, which ataitsA rear end, and preferably at its upper rear end is pivoted on a horizontalI shaft 14 mounted in bearing brackets 15 on the base. 10. The motor includes also a piston to which is connected a reciprocating plunger 17, which is directly and rigidly connected at its forward end to the bucket 12. Air or other motive fluid issupplied first .to one end and then to-'the opposite end of the cylinder -13 by means of a pipe 18 connected to `tlie cylinder neai the ends thereof and a four-way valve 18a.v the motive fluid being designed to be supplied to the pipe 18 by a flexible tube oi pipe adapted to be connectf `ed tol the valvechaiiiber by means of the connection indicated at 18. To guidethe shovel during its forward and rearward .Y reciprocating movements, the shovel is pro,

vided with two parallel guide rods l19 .which are parallel to the plunger 17 and slide through two openings-in the forward .hea-d of the cylinder 13. y

Although armotor such as here indicated,

" would normally give only a forward and rearward reciprocating movement" to the shovel, by my invention thismotor gives the shovel not only the necessary reciprocatingl movements but also gives lto 'the unit iiicluding the shovel`and motor-the upward and rearward swinging ,movement` and this is accomplishedl by the provision of two sets or pairs of -b'ars or arms 2Q and 21,*the two sets or pairs beingrlocated on opposite sides of the motor. Each rear arm 20,- which is somewhat longer than the companion forward arm, is pivoted at 22 to the base .10,y forward of and below the pivotal axis ofv the cylinder 13, and also below the line of movement of the. plunger 17.whe'n in horizontal 'of `substantialy horizontal position. The. forward and shorter arm of each pair is -pivotallyconnected at 23-to the rear part of the bucket, and preferably as here shown,

l .the two arms 2() and 21 of each pair are swung to a certain position.

The Aparts are so arranged that at or near I the endof the outward. stroke of the piston :22 and. 23, with the result that when the shovel is retracted, the tail 25 engages the pin 26 locking the two arms 20'and 21 soas i to form them into'arigid brace or strut. In

view of the fact that the. inward pull of the motor is substantially horizontal, and

inasmuch as this brace is at an angle, or is downwardlyv inclined with respect -to the line of pull, when the piston of thel motor moves lrearward there is impartedl to the shovel, motor, and in fact, 4the entire swingf y ingmaterial moving mechanism or unit, a l

vertical component which swings said mechanism as. a: unitl aroundthe axis of shaft 1l to substantially the vertical posi-- lti'on indicated by dotted lines. I

During the upward and rearward swinging movement-the shovel is being drawn inwardly, the piston then moving toward the rear end of the cylinder, and when the cylinder reaches substantially the vertical position the iston is at the end of its inward stroke. Hldwever, t-he cylinder and in fact the swingingunit move slightly beyond the vertical position, this continued movement beyond the vertical being due to momentum. 'lhe final swinging, movement is checked gradually', and then stopped by 4a yieldable buffer or shock absorbing checking device.

which no t only stops and cushions the rearstarts the unit to swing back to its normal horizontal position. This .device consists l -ward swinging movement, but immediately Y ,preferably ofa coil spring 28 surlmllldll a rod 29 which is mounted on the top of the cylinder 13 and. lextends lengthwise thereof` the upper or Iforv'vai'dlpart of the ,rod passing freely through a hole of a supporting bracket. 2.9a atv-the front head of -the cylinder, and the lower or rear part fitting loosely. in a hea-d of the cylinder. far enough beyond the-rear end of vthecyl- The rod 29- extends slot of a bracket 29b at therear' inder 13 that when the swinging un-it reaches subsantially the vertical position the lower or rear end of the rodengages a plate 10a on baselO. and in consequence the rod moves' through the brackets 29 and 29b and comspring 28 whichl is located bepresses the tweenthe forward bracket 29a and an adpreferabl-y `in the form of a nut. The parts arefso arranged that the spring 28. begins to bey compressed at or about the time the unit reaches the vertical position, and brings justable abutment 29- on the rod, this being Sllghtly above the plunger 17. Additionally y the iinit to a stop without material shock,

and Vthen the compressed spring throws the unit backbeyond the .vertical in the oppositedirection and into a position from which itgdrops by gravity again 'to the lwl'izQntal position. The arms ,'20 andv 21 do not-Aprevent this return movement ofthe unit bev. cause at or' about the end of the upward and rearward swinging movement the, two arms of each pair straighten outJ, and they pass lby gravity and by momentum rearwardly beyond the Adead center, this taking place just as the buderspringQS starts the return Jforward and downward movement.

When the swinging unit reaches its upper or near vertical position, the spring lbuffer stops it without destructive shock but. suddenly enough to causethe material or load in the .shovel to be thrown therefrom or completely discharged out of the lrear end of the shovel into the car or receiving member, 11.

As before stated, the swinging unit drops inder `13, when the mechanisml or unit drops to horizontal position, the lpiston moves rearv wardly'in the oil cylinder so as to check the tall oi the unit. rThis oil cylinder works in suoli a manner that it does not cheek the upward swinging movement, the piston in .the cylinder 30 then passing freely along the cylinder, and it allows the unit to fall quickly -to .near the horizontal position where the movement is checked the last few degrees of the downward swinging movement taking place slowly.

l.` now motive fluid is admitted to the rear end of the power cylinder 13 so as to move the piston therein forwardly, .theshovel is given its forward thrust or `stroke which again ills the shovel and at the end of this forward thrust or stroke the parts will again be in the full line position indicated in Fig. l, the arms 2() and 21 straightening out and dropping downwardly very slightly by gravity and momentum below the dead center when the shovel is atthe end of its outward stroke. rlhe arms do not, however, pass materially beyond the dead center until the return movement oia the shovel is started.v

Although as will b'e readily understood,

`the four-way valve 18a could be operated manually, l prefer that this valve be operated automatically so that without any attention on the part of the operator, ma-

, terial will be loadedv into the receiving element, the shovel passing through one complete cycle of movement after the other,

preferably This vautomatic throwing. of the valve 185' 32 which is pivoted at 33 on -the base 10,-the

bell crank having a vertical arm and a sub-- stantially horizontal arm. Thellatter is nor'- mally'l pulled upwardly to a definite position,

byga spring 3a, and is adapted to be'rocked from normal position by a projection in the ,shape ofa short angle rie'ce 35 on one of -he four-way valve f the Swingin arms' 20.-

18a is provi ed with two bell crank arms' 36 i and 37 which swing in a plane at right angles to `the plane of movement of the bell crank 32, kit will be observed that the arm '36, has attached to it a spring 38 which tends to swingthe valve arms 36 and 37 ton ward the rear end of the motor .or in a counter-clockwise direction f as the same would be viewed in Fig.l 1. the upright' arm of the bell crank 32 is normally in the path of movement of the valve arm 37, so that as the mechanisml swings downwardly after discharging the shovel load, the upright bell crank arm 32 engages the arm 37 and shifts the'valve This shifting of the valve 18a which takes' place .at

or about lthe instant the cylinder reachesl horizontal position, admits themotive fluid to thel 'rear end of the cylinder causing the forward or loading stroke to be imparted to Additionally the shove-l. At or about the time the shovel reaches theend of its forward stroke, the arms 20 and 21 drop downwardly below the dead center, as previously described, and 'in so doing, the angle 35 hits the laterally or horizontally extending arm of the bell crank 32, swinging the upright arm of the bell crank away from the valve arm 37, and permitting the spring 38 which is connected to the valve arm 36 to shift the-four-way valve to its oppositey position and so that motive fluid is admitted to the forward end oi" the cylinder, whereupon there is caused the rearward stroke of the piston and the upward and rearward swinging movement of the loading mechanism.. rllhis movement isV then followed by the downward swinging drop to horizontal position, the fall being checked by the oil cylinder as previously explained,

and carried upwardly and rearwardly and thrown or discharged into the receiving element l1. f 'lhis mechanism is well adapted for certain uses such as for loading ore or coal, especially by reason 0f its extremely simple construction;` 'thema-1 mounted to reciprocate, means for imparting thereto a thrust movement and a withdrawing movement, and means whereby said withdrawing movement' l is automatically converted into a Swingin movement through a 'curve of constan y decreasing radius.

' automaticallyy converting through a curve o 2. In a loading machine, material carryingy means, motive means operatively associated therewith to successively thrust and withdrawing movements to the same to effect loading thereof and means for the withdrawing movement into a swinging delivery movement through a curve of constantly decreasing radius.

3. In a loading machine, material carrying means, motive means operatively associated therewith to Vreciprocate the same to effect loading thereof and withdrawal from the pile and thereafter cause the same to effect a swingin delivery movement.-

constantly decreasing radius, said means including means whereby the said carrying means swings back to normal position through an arc differing from that which it describes in moving to delivery position. v

4:. ln a loading-machine, material carrying means, motive means operatively associated therewith to reciprocate the sameto effect loading thereof and withdrawal from the pile and thereafter cause the same to effect a swinging delivery movement through a curve of constantly varying radius.

5. In a loading machine, a material dig- I ging and shifting devicecomprising a shovel mounted to reciprocate to project the same into 'and withdraw it from the pile and to thereafter swin the same for e'ecting delivery of a loa received during reciprocation thereof, and means whereby said swingth load from the shovel, said means including motive Vmeans for imparting the several aforesaid successive movements to lthe shovel.

6. A loading machine comprising motive `means, a shovel adapted to be reciprocated to project the same-into and withdraw it from the pile,-and swing thereby to deliver a load, and means associated with said shovel and motive means for effecting forcible vprojectionof the lload from the shove1,

machine, la material dig.-. ging and shifting device comprising a shovely impart movement effects forced projection of i. 7.. A loading machine comprising motive means, ashovel adapted to bereciprocated to project the same into and withdraw it fronithe pile and swing thereby :to deliver ble projection ofthe load from the shovel,

and'return the latter to its normal position 'during an interval of idleness of the motive means.

8. A loading machine comprising motive l means, a shovel adapted to-be reciprocated to project the same into and withdraw it from the pile and swing therebvlto deliver a load, and a stop for arresting the swinging. movement of the shovel and effecting forcible projection of the load therefrom.

9. -A loading'machine comprising motive means, a shovel adapted to he'reciprocated to project the same into and withdraw it from the pile 'and swing thereby to deliver a load, and a stop for arresting the swinging movement of the shovel and ei'ecting projection of the load therefrom and effect tial return movement of said shovel to its normal position. I

10. A loadingmachine comprising motive means, a shovel'adapted to be reciprocated to project the same into and withdraw it from the pile and swing thereby to deliver a load, a stopfor arresting the swinging movement of the shovel and effecting forcible projection of the load therefrom and effect initialreturn movement 4of said shovel to its Anormal position, and means for maintaining said motive means idle during lreturn movement of said shovel to normal position.

11. A loading machine, comprising `a shovel, motive means associated therewith for effecting reciprocation of said shovel into a pile to load the same and then to withdraw it from the pile, and swing it to a point of discharge, a 'yielding stop element disposed to arrestA the swinging movement of said shovel to eii'ect forced proection of the load therefrom and effect re oundof ysaid shovel in its return swing-to normal effect rebound of said shovel in its return swing to normal' position, a source of power for said motive means, and means control- Ell noemen latter idle during the return moveent ot the latter being through a substani constant arcn v g .ln a loading machine a base, a swing.- material receiving and conveying unlt me to swing about a horizontal axis, said swinging unit including a shovel and a motor connected to the shovel to reciprocate the same, and means whereby said motor is caused to move the shovel outwardly to receive a load, then inwardly and to simultaneously swing the unit upwardly and rearwardly through an are of substantially ninety ydegrees todumping position. le., ln loading machine, a base, a swingmaterial receiving and conveying unit mounted tol swing about a horizontal axis, swinging unit including a shovel and a motor connected to the shovel to reciprocate the same, and means whereby said motor is caused to move the shovel outwardly to receive a load, then inwardly .and to simultaneously swing the unit upwardly and rearwardly through an are o substantiallyy ninety degrees to dumping position, said means including bracing arms between the unit and base.

l5. ln a loading machine, la base, a material receiving and conveying unit mounted to swing about a horizontal anis and including shovel and a motor connected to the shovel to reciprocate the same, and means whereby said motor is caused to move the f shovel outwardly to receive a load,then in- Y wardly and to simultaneously swing the unit upwardly and rearwardly through an arc or substantially ninety degrees to dumpmg position, said means comprisingA a braceincluding pair oiE arms pivoted together and pivoted to the unit and to the base.

i6. ln a loading machine, a base, a swing ing material receiving and coveying unit mounted to swing in a vertical plane, said swinging unit including a shovel and a motor igor reciprocating the same, and means whereby said motor causes the shovel to be moved outwardly to receive a load, then to be moved inwardly and at the same time causes the `unit to swing upwardly to a position at which the load is discharged' and from which the unit may automatically return to substantially horizontal position.

17. ln a loading machine, a base, a ma- `terial receiving and conveying unit mounted to swing in a vertical plane' and including a shovel and a Imotor for reciprocat-` ing the same, and means whereby said motor causes the shovel to be moved outwardly to receive a load, then to be moved inwardly and at the same time causes the unit to swing upwardly to a position at which the load is discharged and from which the unlt 1 oit said shovehthe said return mov'ev to receive a load, then to be moved inwardly tion, said means including motor controlling may return'to substantially horizontal pesiu tion., and 'means for checking the swinging movements oit the it.,

ln a loading machine, a base, a ma terial receiving and conveying unit mounted to swing in a vertical plane andv includ mg a shovel and a motor 'for reciprocat lng the same, and 'means whereby said motor causes the shovel to be moved outwardly '75 and at the same time causes the unit to swlng upwardly to a .position at which the load-is discharged'and from which the unit may' return to substantially horizontal posi- Si) means which automatically' reverses themotor at predetermined points in the cycle of movement. v i9. ln a loading machine, a base, a material receiving and' conveying 'unit mounted to swing in a vertical plane and includlng a shovel and a motor 'tor reciprocating the same, and means whereby said motor causes the shovel to be' moved outwardly to receive a load, then to be moved inwardly and vat the same time causes the unit to swing upwardly to a position at which the load is discharged and from which the unit may return to substantially horizontal ,posi` tion, said means comprising pivoted arms connected to the unit and to the base, a valve for the motor, and means whereby the valve is automatically actuated to reverse the motor at predetermined points inv the cycle of movement.

20. ln a loading machine, a base, a shovel, a reciprocating motor including a cylinder pivoted to the base, a plunger connected to the shovel, and means whereby a swinging component is given by the motor to the motor and shovel when the shovel is moved inwardly by. the motor.

21. ln a loading machine, a base, a shovel, a reciprocating motor including a cylinder pivoted to the base, a plunger connected to 11o the shovel, and means whereby swinging component is given to the motor when the shovel is moved inwardly by the motor, said means including a brace or strut connected to the shovel and base and composed oi two pivoted members which in a certain position are loclred together.l

22. ln' a loading machine, a base, a shovel, a reciprocating motor including a cylinder pivotedto the base, a plunger connected to i given tothe motor and shovel ,whenv the shovel is moved inwardly bythe motor, and

means automatically reversing the motor. i 24. In a loading machine, va base, a shovel, a reciprocating motor including a cylinder pivoted to the base, a plunger connected to the shovel, and means whereby a swinging i component of the power of the motor is' given to the motor and shovel when the shovel is moved inwardly by the motor, a four-way valve for the motor, and means for automatically reversing the valve at ,given points inthe cycle of movement imparted to the shovel. -v l 25; In a loading machine, a shovel, a motive element for reciprocating the same to project it into and'withdraw it from 'material to be transferred, ymeans associated with said shovel and said motive element whereby the withdrawing stroke of the shovel is converted into a swinging movement thereof through an arc of constantly decreasing radius to the point of dlscharge for the load. y

26. In a loading machine, a shovel, a motive elementyfor reciprocating the same to project it intojand withdraw it from material to-be transferred, and means associated with said Esh'o'vel and said motive element whereby \the withdrawing stroke; of the shovel is converted linto a swinglng movement thereof through an are o f oon stantly decreasing radius to the pomt of:

discharge for the'load, and a sto v*for arresting said swinging movement or effecting forcee projection of the load from the shovel?"4 L I 27. I na loading machine, a shovel, a motive element for reciprocating the same to project it into and withdraw it from material to betransferred, and means associated with said lshovel and said motive element whereby the withdrawing lstroke of the shovel is converted into a swinging movement thereof through an arc. of constantly decreasing radius to the point of discharge for the load, and a yielding stop for arresting the swinging movement of said shovel to effect forcible projection of the load therefrom and effect rebound thereof toward its initial position.

28. In a loading machine, a shovel, a motive element for reciprocating the same to project it into and withdraw it from material to be transferred, and means associated with said shovel and said motive element whereby the withdrawing stroke of the shovely is converted into a Swinging movement thereof through an arc of constantly decreasing radius to the point of discharge for the load, a source of power for said motive element, means controlling the connection between said source and said motiveI element, a yielding stop for arresting the swinging movement of said shovel to effect forcible projection ofthe load therefrom and effectlrebound thereof toward its initial position, and means for interrupting the connection between said motive element and 4said source of power during the return.

vmovement of the shovel to its initial position.

' 29. In a loading machine, a base, a material carrying unit comprising a motive element and a shovel carried thereby both mounted on said base to swing in unison about a common axis, said motive element adapted to reciprocate said shovel topproject same into and withdraw the same from Vthe material to be transferred, means associated withsaid shovel and said motive element and base for automatically converting a part of the withdrawing stroke of the shovel into a swinging movement thereof through an arc of constantly decreasing radius.

30. In a loading machine, a base, a material carrying unit comprising a motive element and a shovel carried thgereby both mounted on said base to swing in unison about a common axis, said motiveelementadapted to reciprocate said shovel to roject same into and withdraw the same om the material .to be transferred, and means associated with said shovel and said motive element and base `for automatically converting a part of the withdrawing stroke of the shovel .into a swinging movement thereof through an arc of constantly decreasing radius, and means` disposed to arrest vthe swinging movement of said shovel to effect forcible projection'of the load therefrom.

31. In a loading machine, a base, a material carrying unit comprising al motive element and a shovel carried thereby both mounted on said base to swing in unison about a common axis, said motive' element adapted to reciprocate said shovel to project same into and withdraw the same fromtthe material to be transferred, and means associated with said shovel and said motive element and basefor automatically converting a part of the withdrawing stroke of the shovel into al swinging movement thereof throughvan arc of constantly decreasing radius, and yielding means disposed to arrest the swinging movement of said shovel to effect forciblev projection of the load therefrom and effect a rebound of said shovel to its initial position.

32. In a loading machine, abase, a material carrying unit comprising a motive element and a shovel carried thereby both mounted on said base to swing in unison about a common axis, said motive element l125 adapted to reciprocate said shovel to project same into and withdraw the same from the material to be transferred, andmeans associated with said shovel and said motive element and base for automatically converting 13()` i automatically arresting the swinging movel antigen a part of the withdrawing-'stroke of the shovel into a swinging movement thereof through an 4arc vof constantly decreasing radius, and maintaining the momentum thereof to a predetermine point, and means for ment ofl said shovel', and effecting return thereof to its initial position while maintaining the niotive element idle.

33. .ln a loading machine, a bese., a material carrying unitv comprising motive element and a shovel carried thereby both mounted on said base to swing in unison about a common axis, said motive element adapted to reciprocate said shovel-to project saine into and withdraw the same-from the material to be transferred, and means associated with said shovel and said motive element and base for automatically converting a part of the withdrawing stroke of the shovel into a swinging movementl thereof through an arc of constantly decreasing ra.- dius, and means associated with said motive element and its associated parts for arresting the swinging movement of said shovel to elect forcible projection of the load therefrom and edect a rebound and return by gravity of the s ovel and motive element to their initial pos tion.

34:. lin a shoveling machine, a shovel, a motive elementl for reciprocating the shovel to project it into the material and there after withdraw the same, a support on which the said motive element and shovel are pivotally supported, and means associated with the said supportend said shovel for automatically 4converting a part of the withdrawing-stroke of the shovel into a swinging delivery stroke thereof.

l 35. lln a shoveling machine, a shovehv-amotive element for reciprocating the shovel to project it into the material and thereafter withdraw the same, a support on which the said motive element and shovel are pivotally supported, and means associated with the said-support and said shovel for automatically converting a part of the withdrawing stroke of the shovel into a swinging delivery stroke thereof, means for 4 arresting the swinging movement of said shovel Vfor efec-ting forcible projection ofthe load thererom.

36. In a shoveling machine, a shovel, motive element for reciprocating the shovel to project it into the material and thereafter withdraw the same, connection between said motive element and a source of power, means interposed in said connection for-controlling the same, a support on which the said motive element and shovel.. are pivotally supported, means associated with the said support and said shovel for automatically converting a 'part of the withdrawing stroke of the shovel into a swinging delivery stroke thereof, and means for arresting the swinging movement als.

,of `said shovel for sheeting-forcible -projecj tion of the load therefrom, and means assoelated with the power control and the arrest-l -ing means for automatically 'edecting return of the shovel to initial position.

37. lin a shoveling machine, a shovel, a motive element for reciprocating theshovel to project it into the material and thereafter withdraw the same, `connection between said motive elementand e source ofpower, means v.interposed in said connection for controlling the same, a support on which the said motive element and, shovel are pivotally supported, mea-ns associated with the said support and vsaid shovel 'for automatically converting a' part of the .withdrawing stroke of the shovel linto 'a swinging deliver stroke thereof, means for arresting the clivery movement of said shovel to ezdect projection of the load therefrom, and means associated with the power control and the arresting means,

whereby the power is shut od as said shovel .approacheseaid arresting means', the latter including means for electing rebound of the shovel for imparting theretoiinitial return movement to its initial position, the latter completed by ,rravity.l j

38. ln a shoveliiig machine, a load-receivtherewith and adapted to normally impart a movement of predetermined length thereto toward the material to be transferred fol- --lowed by a reverse movement thereof, and -rneans associated with said 4receiviing and ythereof laterally of vits nist-named movement.

3 9. ln a loading machine, a carriage, a cylinder pivotally mounted thereon, ia piston ing element, a motive element .associated and piston rod adapted to be. reciprocated thereby, a shovel carried by the piston, toggle levers each comprising two parts pivotally secured together at one end, means limiting their relative movement in one direction, one of said parts pivotally secured to the base andthe other to the shovel, the connection of one ot 'said parts to the base being nearer the shovel than the pivot of the cylinder and said means limiting the relative movement of said parts coacting with said pivots for converting movement of the shovel in one direction into a swinging movement of 'the same and saidl cylinder.

t0'. in' a loading machine, a carriage, a cylinder pivotally mounted thereon, a piston and piston rod adapted to be reciprocatcally` cause the cylinder to turn on its pivot ydurlng the balance of'the complete return stroke 'of 4'the shovel.

v41. A shoveling machine comprising a base, ,a shovel reciprocablerelatively to said base to project into and withdraw from a pile, a motive element associated with said element thereon pivotally movable about a shovel for effecting' reciprocation thereof, and means associated with the base, the shovel and the motive element for automatically converting the withdrawal movement of the shovel into swinging delivery movement thereof through a curve of constantly decreasing radius. s.

42. A shoveling machine comprlslng a base, a' shovel pivotally movable relatively to the base about a fixed axis, and reciprocable relatively to said axis 'to project it into and withdraw it from a pile, a motive ele- 'l ment associated with:the shovel to effect reciprocation thereof, and means associated with said shovel and said base for automatil ,cally converting the withdrawal movement of the shovel into a swinging delivery movement thereof. A

43. A. shoveling machine comprising a Y base, a shovel pivotall'v movable relatively to the base about` a fixed axis, a motive element for imparting rvcprocative movement part a long thrust and a short withdrawing' y movement to. said shovel, said means adaptuntil said shovelreturns to its initial position preparatory to another' thrust movement.

44. In a shoveling machine a base, a motor fixed axis, ashovel carried and adapted to be reciprocated by the said motive element to thrust it into and withdrawiitvfrom a load, means associated lwith said shovel and said base for permitting a long thrust movement of said'` shovel in a predetermined plane and a'short withdrawing movement thereof in .the same plane, said means adaptedto compel said motive element and shovel to ei'ect a swinging movement `during the remainder of the withdrawal movement of the shovel to substantiallyits initial position with respect to the motive element.

45. In a ,shoveling machine, a base, a motiveelement, a shovel adapted to be reciprocated by said motive element and means associated with said base and shovel for convertng reciprocative movement thereof into swinglng delivery movement thereof through an arc of constantly decreasing radius and effecting a return swing of the shovel to initial position through an arc of aradius substantially e ual to the shortest radius of the curve of de ivery movement thereof.v

In testimony whereof,-I hereunto ,alix'my signature.

BRUCE A; MIDDLEMISS.

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