US1032612A - Combination coal grading screen and picker table. - Google Patents

Description

O. B. KLOETZER. COMBINATION GOAL GRADING SCREEN -ANN PIGKEE TABLE. APPLICATION FILED JAN.26. 1912.

a Vcitizen of Austria-I-lungary,

- Iwhich the fo To it may camera:

STATES .PATENT oEFIoE.

' onor. non'rznn., or COLUMBUS, omo.

confirmaron con. emma scnEEN mi) Hexen TABLE.

I `Oi'ro B. 'KnoE'rzEigv residing at Columbus, in the county of Franklin and State -of Ohio, have invented certain new and useful Improvements in Combination Coal Grading Screen and Picker Table, of

lowing is a specification.

My'invention rela-tes to coal grading machines and is' particularly directed to the Be it known that provision of a combination coal gradingv screen and picker table. l

, It is designed to providel a screen grader and a picking Itable therefor, which not only decrease the required space in a very vgreat degree,`but which render it possible to obtain Awhat is termed the run of the mine with practically no'preparation and at any time 1t. may be deslred without changing the normal course Vof the bulk of the material over the screening surfaces.

It is further aimed in the a'ttamnent of this result to finally distribute the run of the mine upon the picker table in two or more layers with the bulk of thelarger material in the uppermost layer and therefore subject to ready access by the pickers surrounding the table. .v

My invention preferably contemplates the provision of a spiral oscillatory screen operating in conjunction with a rotary picking table preferably mounted upon a shaft forming the means of support of the spiral vscreen and desirably vconcentric therewith.

The spiral screen may be varied as ,to structural details, but it desirably comprises a plurality of successive sections of screen of determinately increasing mesh, each forming a false bottom for the body proper of the chute. Beneath the terminus of each section the bottom of the body portion .proper ov the chute is provided with a supplemental and laterally directed chute and each of these supplemental chutes hasa gate therefor normally raised, but capable of being lowered into the same plane with the floor or bottom of the body portion' proper of the screen to' close the opening to lts chute. When all of these gates are closed, the supplemental chutes are cut off and the run of the mine is permitted to pass down the entire length of the screen during the course `of which passage the smaller material passes the larger proceeds to the end of the actual speommon of man ramt. Application lednlanuax'y 26, 1912. 'Serial No. 673,601;

Patented July 16, 1912.

l-screenihg surfaces. Thus the run of the mine would be delivered in layers to the picker table whlch is, constantly rotating rielzlith the `end of the oscillatory screen.

referred embodiment gf my inven tion is s ownin the accompanying drawings,

in which similarcharacters of re rence designate corresponding parts, and in which- Figure 1 is a to plan View ofvmy screening structure, and, Fig. 2 is a side elevation of the structure showing the relative positions of the vibratory oscillating screen and the picking table. v In the drawings, there is shown the vertijcal shaft 1 journaled at' its base in thecasting 2`and having its upper end provided with a beveled gear 3 with which meshes a bevel pinion 4.- upon the endv of a shaft 5 carried in bearings 6 which may be mounted upontimbers as shown at 7'. Between these timbers if such lmethod of mounting is used, the shaft 5 carries a sprocket 8 which is driven by means of a chain 9 extending over a gear 10 upon the driving shaft 11 mounted upon the adjacent framework 12, such shaft 11 carrying a pulley 13 which is driven as is customary and carrying at its ends crank arms 14C-to which are connected links 15.

Keyed to the shaft 1 at a point compara .tively near its base is a table-like structure `16 which is adapted and constructed to rotate therewith and which is supported near its outer periphery by spaced stanchions 17 Ahaving' roller bearings 18 upon their upper ends bearing `against 'and supporting the track surface 19 upon the under surface of the table-like structure 16 at the outerpcriphery thereof. It will be understood from this that the driving of the pulley 13 drives the shaft 11, sprocket 10 and by means of chain 9 drives the sprocket 8, which in turn rotates the shaft 5 and by means of the intermeshing connection, of the bevel 'gear 3 and pinion 44 rotates the shaft 1 carrying the table-like structure therewith. Thus the table-like structure which is known generally as the picker table, is continuously and positively rotated.

The shaft 1 is desirably provided at intervals with collars 20 and these collars serve as supports for spider arms 21 which support a spiral chute 22 of channel form and having a false bottom 23 of reticulate material arranged in successively increasing grades, thatl is, with its apertures disposed in sets which are successive and in such suc` of the screen.

cessive sets increase so that material passing down this false bottom is suitably graded in a manner known. At or near the end of each set of apertures in this false bottom, the bottom proper of the chute is provided with a supplemental chute laterally directed and designated 24. The entrances to these laterally directed chutes vare controlled by pivoted gates 25 which are normally in the position of the gate shown at A in Fig. 2, but which may be lowered to the position of the gate shown at B in the same ligure. lVhen in the position shown at A, the material is graded into the grades for which the screens are provided such as,- for instance, egg, nut and lump, and these respective grades are directed into the laterally disposed chutes and delivered at the desired points. However, when it becomes desirable to attain the run of the mine the valves or gates are closed by movement into posi.

tion shown at B. The material then passes down along the false bottom of the spiral chute and along the actual bottom thereof. The finer-material necessarily passes into` the actual base of the chute, while the extremely heavy material is maintained upon the top Thus the material is delivered from the end of the chute upon the rotating picker table in two distinct` layers with the heavier material forming a large portion of the upper layer. Even in the run of the mine it is generally desirable to have the pickers work upon this heavier coal and its position in the upper' layer renders it very readily accessible. Of course, the operation is continuous under ordinary circumstances and there is provided means for brushing the material off the picker table just before completing one revolution 'and passing it into any suitable receptacle or otherwise disposing of it.

vThe screening operation of the spiral screen is greatly facilitated by the connection thereto of the links 15 as at 15a and of course the continuous rotation of the,

v shaft 1l causes the transmission of the'oscillatory movement to the spiral screen.

It willv be seen that I have provided an extremely simple and compact structure for grading coal,7which may be readily transformed into a direct delivery device for the entire run of the mine.- In addi-tion, I have greatly minimized the required space in machines of this type by providing a rotary picker table in combination with an oscillatory spiral screen oscillating about the shaft with which rotates the picking table.

1. A combination coal grader screen and picker table comprising a spiral grading element, a rotating receiving element disposed beneath said spiral element, and means for eliminating the grading action of the spiral element.

2. A combined coal grader screen and picker table comprising a rotary picker table, a spiral screen element having a false bottom of reticulate material in sets of varying meshes, means for conducting the material selected by each set of meshes, and means for rendering said conducting means ineffective whereby the entire bulk of mate- Ilal'placed Aupon the spiral element is delivered at its lower end on to the picker table. y

3. Av combined coal grader screen vand picker table comprising a screening element, a picker table beneath the delivery end of said screening element, the delivery end and the said table being relatively rotatable,

means for grading the material passing over the said screening element, and means for rendering said grading means ineffective to Apermit delivery of the ent-ire bulk of material to the picker table.

In testimony whereof I aliix my signature in presence of two Witnesses.

OTTO B. KLOETZER.

Witnesses:

WALTER E. S. BooK, C. P. Conn'r'r.

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