US1314755A - Chttte - Google Patents

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1. H. n. PETERSEN. C .HUTE FOR CONTROLLING THE DISCHARQE 0F GOAL FROM RECIPBOCATING SCREENS.

APPLICATION FILED JULY 15.1918. 1 314 755; v PatentedSept. 2,1919.

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I APPucmou FILED JULY 15.1mm 1,814,755'. Patented Sept. 2,1919.. I 4 2 SHEETS-S HEET 2 g I' IILH v Wine/5,5

JQHN H. n.

UNITED STATES PATENT OFFICE.

BETERSEN, 0F CHICAGO, ILLINOIS, ASSIGNOR T0 LINK-BELT coMrANY; or

CHICAGO, ILLINOIS, n CORBQBAEEION OF ILLINOIS.

QHIITE e @QN M T mscneese a sees ra er e erB w- N SCREENS- To all whom it may concern:

Be it known that I, JOHN H. D. PETERSEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Chutes for Controlling the Discharge of Coal from Reciprocating Screens, of which the following is a specification.

My invention relates to means for discharging and particularly controllably discharging lump coal from the end of a reciprocating screen in such way that the coal after it has been prepared or sized will reach a car with a minimum of breakage.

It will be understood that the coal is discharged from the, tipple onto an inclined reciprocating screen. As the screen reciprocates'the coalof varying sizes. is screened off and discharged into the coal cars, many difi'erent means being used to get the coal from the screen t the car. The farther down the screen the coal goes the larger proportion ofthe' smaller sizes will be drawn off. until at the end of the screen we try to have and expect to have only the very large lump coal.

This lump coal must be delivered with a minimum of fines and smaller scraps and because the coal is large there is a tendency for itto rush down the lower end of the screen at a relatively high velocity and means must be provided to check this high velocity and control. the flow and discharge of the coal but this checking means must be exceedingly gentle else the impact of the coal lumps against one another and against the screen will result in the breaking up of large pieces.

My invention, therefore, comprises means for catching the coal as it leaves the screen and, of course, these means may be used for catching the coal of different sizes and may be. applied at screen and easing the coal down toward the car and gradually changing it and discharging it along a path perpendicular to the path traveled by it on the screen.

,In general terms, my invention comprises Specification of Letters Radiant.

different places along the.

Patented Sept. 2, 1919.

Application an July 15, 191 s. s m acts? a series 91'' separate inclined adjacent plane surfaces, so arranged that the coal passes from the screen onto and across aseries of these "surfaces and these surfaces are so arranged that the movement of the coal in a direction (parallel with the axis of the screen is gra nally stopped and a movement of the coal along a line inclined to the axis of the screen is gradually started. The lnelined planes are" so arranged that a light, small piece of coal coming down at low velocity will be slowed up and deflected and the same will happen to a heavy large piece cg ning at high velocity, the only difference being that the large high velocity piece may cp'me alittle farther onto or across one of or some oi said planes before its speed has been sufiiciently reduced.

n order to visualize the device, it is necessary to think of an individual piece of coal Wlilch travels along the screen down to the first inclined lane which gives it a slight velocity to clgar the screen then across a tilted plane. The piece of coal travels along a line parallel with the axis of the screen, being deflected downwardly on a transverse line inclined to the axis of the screen, and thence the coal reaches a further plane which ceniplete's the deflection. The faster the coal is traveling the farther it goes on and; across these different inclined planes.

When the apparatus is running at full volume, a large stream of coal is traversing.

the chute, and will be impossible to trace the indiv dual coal particles, but the effect is the'same because the friction of the lower.

' A7 are'pivoted chutes.

' of chute which I a'mabout to describe.

V drawings wherein:

Figurel is a side elevation'of the screen with my chutes in position;

Fig. 2 is a top plan view of with the discharge chute;

Fig. 3 is a side elevation ofthe chute and discharge chute; V

Fig/4 is an end view of the discharge chute.

the chute itself .Likepart's are indicated by like letters inall the figures.

-A is a supporting framework mounted on the columns A A which columns also carry a covering shedv A A A? are car tracks upon which travel -cars A A adapted to be filled with coal or other such friable material. "Aiis achute which'may or may not bemyftype of chute.

from the screen which I am about to describe the'coaljbeing allowed to drop freely fromthe endof the chute into the car below. A The way in which are fastened to the frame is not here specifically shown because it forms no part of my invention. The free ends are adapted to be lowered in the cars A by paying out on means of the worm and gear and crank A so that the they brought close to the bottom of the car to prevent breaking of the coal by its falling into the car. These two pivoted chutes get the coal from the screen hrough my special type B B are rollers mounted on the frame A. B? is a reciprocating screen. It is provided with a plurality of supporting lugs B which have tracks B3 resting upon the rollers B B.

B is a connecting'rod leading from any suitable source of power tothe screen means being provided to reciprocate it to cause the jThe perforations, it

screen to reciprocate the tracks B are horizontal and therefore inclined to the screen the screenitself being downwardly inclined allel-withthe axis of the screen but inclined thereto in a horizontal plane. B is a chute; It may be fixed orit may osc'llate as the case may be adapted to discharge coal or other material into the screen B at its upper end. B is a perforated screening floor.

will be observed, fare? smallso thatonly small particles of coal can. thepocket B"; be-.- neath the screen whence they are discharged into the chute A.

pass through and venter Farther down on the shown only three separations there may more Or less.

I have shown it an ordinary type because. ,it, catches the finely divided-part of the coal which is sold as It will be noted'that 7 thus reciprocation of. the screen takes placein a direction not parscreen is a perforated screen floor B The perforations are larger allowing larger particles of coal to pass through into the pocket B and thence to reach the chute B which may or may not be my chute. Preferably it is. The particles-which are so largethat they do not pass through the perforations in the floor B pass into the chute B at the end ,ofthe screen and'this chute is preferable, as indicated, my form of plane surface deflector chute.

It will be understood that while I have be The screen is sharply inclined and the coal comes very rapidly. It. must be checked very rapidly in 'a shortspace particularly-at the end of its excursion and deflected into the path at an angle andgenerally a sharp angle, to its previous path, and itis here that my screen illustrated in detail in Figs. 2, 3, and Lassumes very consider ableimportance.

"C is a chute terminat'ng the perforated.

screen B and continuing 1t preferably though not necessarily at th a angle and I C C are sidewalls to guide the eral panel C its longitudinal axis inclined.

to the end of the chute C, the panel being inclined longitudinally and being inclined upward laterally from the edge of the triangular panel. On the outer side of the panel, and connected with the side walls C of the chute, is a panel;()*, tilted at an angle to the panel CV ing as an outer wallto guide the flow of material to the lower end, of thepanel. At the rightof the triangular panel is a second triangular panel, C sloping down to its apex at the junction point with the panels: C and G One side is coextensive with the adjacent side of the'triangula'r panel 0 and another side extends along'the continuation of the member C The three panels, C C3 and C are so I point of each is ,at the joint: C, where the threewmeet. The material is discharged; from the outer edges C elsv C and Cr", and is received in thechute A", or. conveyed away by means not shown. 7 It. will be understood that thedrawings are as, diagrammatic, and that downward to the rlghtaz and C of the pan- Across the end of the and'serv-i disposedthat the lowest f any other suitable to be taken in a sense many variations 1 V in part and in arrangement thereof may be; madewithout departingfrom the spirit of:

I the other panelsmaybe varied. The number. V of the panels used may be varied, and they "need not necessarily be plane surfaces alsuitable form of chute or conveyance,

though plane surfaces are preferable. A

single inclined curved surface might be made to take the place of the panel described.

The use and operation of my inventlon are as follows:

The smaller lumps of coal or of other material conveyed will escape at the point provided through the bottom of the screen, and will be conveyed to the waiting cars by any and by my form of. chute, where the size of the coal or material warrants it. The larger lumps are delivered unbroken at the end of the screen, to a chute which may or may not be a continuation of the screen in angle and width, but preferably is so. The angle of this chute is such as to carry the coal by force of gravity at a fairly rapid speed. Conceivably the same device may be used where the material is conveyed along a horizontal chute by momentum given to it by other means. The chute is suddenly broken by an inclined panel which conveys the coal downwardly at a higher angle, and thus at a more rapid rate of travel. This panel is preferably triangular, its base belng formed by the end of the chute, which is preferably at right angles to the course of the chute. Forming the other two sides of the triangle are other panels inclined upwardly from the edges of the first panel. Obviously, since the edges are joined to the edges of the downwardly tilted panel, they also slope downwardly along the edges of the first panel. Touching the apex of the first panel, and bounded by the downward and outward edges of the other panels, is the open space through which the material is discharged.

The material sliding at its normal speed down the chute, crosses the first triangular panel'with accelerated speed. The momentum carries it up the sides of the two inclined panels, their inclination gradually reducing the speed with which the material travels forward. But as these panels also slope down to the discharge opening, and the material, as it slacks its speed of travel in the direction given it by the chute, slides in the new direction, without any violent change of direction, or violent contact with any surface, and drops down into the receiving means provided. The continuation of the side wall across the top of one of a the panels, and the additional tilted panel along the outside edge of the other, prevents the material from. escaping from its new path of travel, where a heavy load, or the momentum of a large piece would make it possible Beyond the unavoidable contact of the separate lumps, there will be no means for pulverizingor breaking the coal or other material delivered, and it will reach its destination with a minimum loss from such causes. Obviously this process may be carried on with an almost limitless variety of disposition of panels, shape of panels, inclination of panels, or combination of plane or curved surfaces. The principles involved would in all cases be the same.

The material is intended to be carried along a longitudinal or relatively straight line chute at a comparatively low speed so that the material may be screened as it passes along the chute. The material is then to be diverted from the line of flow in the chute and directed to one sideas, for example, on a pile Within a car or boat or other receptacle to be loaded or to be delivered to another laterally extending chute. This operation must take place with a minimum tendency to break or reduce the size of the material particles or pieces. Broadly speaking, I accomplish this result by first accelerating the flow in or at the end of the chute and this may be done by a downwardly inclined portion or extension of the chute bottom; and secondly, by then arresting and directing laterally such accelerated flow of material, and this may be accomplished by one or more, preferably by two, inclined planes which project into the path of the material established for it by the chute and arrest the accelerated flow of the stream and then turn it to one side. Preferably these two planes join the edges of the downwardly inclined accelerator section so that the low est corner of each is adjacent to that of the other and at one side of the middle line, but between the vertical walls of the chute and below the bottom of the chute where there is formed, so to speak, a discharge corner over which the material flows somewhat as it descends through the opening in the bottom of a hopper, and thence flows laterally, or is delivered laterally, to the receiving receptacle or chute.

I claim 2+ 1. The combination of a substantially longitudinal chute adapted to convey a stream of material at a relatively low speed, with means for diverting said stream to a direction at an angle to its flow in the chute comprising means for accelerating the speed of flow, and means for retarding the speed of flow and directing the stream into a path at an angle to its flow in the chute.

2. The combination of a substantially longitudinal chute adapted to convey a stream of material at a relatively low speed, with means for diverting said stream to a direction at an angle to its flow in the chute comprising a downwardly inclined extension of the chute bottom adapted to accelerate the speed of flow, and means for retarding the speed of flow and directin the stream into a path at an angle to its flow in the chute.

3. The combination of a substantially longitudinal chute adapted to convey a stream of material at a relatively low speed,-with of flow and a plane beyond said acceleratlng means for diverting said stream to'a 'direc tion at an angle to its flow in the chute comprising means for acceleratingthe speed of flow, and a plane beyond said accelerating gmeans placed atan angle to the direction of flowand in the pa'th of such 'stream' of 7 material.

'4. The combination of a'substantially longitudinal chute adapted-t0 convey a stream of material at a relatively low speed with means for diverting said stream to a direction ata'n angleto its flow in the chute comprising a downwardly inclined extension of the chute bottom adapted to accelerate the speed section placed at an angle to the direction of flow and in the path of such stream of material. p v

" 5. The combination of a substantially lon- .gitudinal chute adapted "to convey a stream of material at a relatively low speed, with nating at a point between gitudinal chute adapted to convey a stream of material at a relatively low speed, with means for divertingsaid stream to a direction at an angle'to its flow in the chute comprising a downwardly inclined triangular extension accelerate such triangular section and both at an angle Copies of this patent may 'ceive material of the chute bottom adapted to the speed of flow and two planes attached respectivelyto the outer edges of be obtained-for five cents-eac1i,-by addressing the Washington, 20.0..

to the direction of flow and in the path of such stream of material the lowest point of;

the acceleratlng section and the two planes being between the side walls of the chute.

and below the bottom of the chute.

7. The combination with a downwardly inclined chute, of a pluralityof deflecting discharge. chutes each made up of a plurality of inclined vplane surfaces arranged" to receive material from the chutev and" deflect and discharge 1 it away from the chute, at an angle to the axis thereof together with 'material guiding means connecting the main chute with the discharge chutes.

deflecting 8. The COlIlblIliLtlOIl with a downwardly. inclinedchute, of a plurality of deflecting:

discharge chutes each made up of a plurality of inclined plane surfaces arranged to re chute connecting the main chute with each of'said deflecting chutes save the last one.: 9. The combination with a downwardly inclined chute, of a plurality of deflecting discharge chutes each madeup of. a plurality of inclinedplane surfaces arranged to receive; material from the chute'and'de' flect- 'anddischarge it aw'ayfrom the chute,

the axis thereof, and means r at an angle to in connection with sald main chute for delivering material to the-intermediate chute without impeding the flow of materialdown the main chute.

In testimony whereof I in thepresence of two witnesses, day of July, 1918. p

JOHN H. PETERSEN.

Witnesses V V V I MINNIE M. LINDENAU,

a CHRISTINA DEANS.

affix my signature,

.Commissioner of Patents,

this 5th from the chute and deflect' and discharge it-away from the chute, at

' an angle to the axis thereof, an intermediate

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