US1479904A - Compound gyratory screening device - Google Patents

Description

Jan. 8 1.924. I 1,479,904

H. W FALKER COMPOUND GYRATORY SCREENING DEVICE Filed May 1. 1922 4 Sheets-Sheet MS I \N Jan. 8, 1924. 1,479,904

H. W. FALKER COMPOUND GYRATYIORY SGREENINGDEVICE Filed May 1, 1922 4 Sheets-Sheet imi 4 Sheets-Sheet 4 Filed May 1. 1922 H W FALKER COMPJOUND GYRATORY SCREENING DEVICES Jan. 8, 1924. I

Patented Jan. 8, 1924.

: NITED amen ounce;

HENRY WILLIAM: Famine, or ASHLAND, PENNSYLVANIA.

COMPOUND GYnAr'ony sonnnntne nnvien Applicationfile'd May 1,,1922.

Devices, of which the followingis a specifi cation.

This invention relates to apparatus: for

screening and grading coal or like material,

into various sizes, and is arranged especially for use in breakers, so that after the coal has been discharged from the tipple, picking table and rollers, it willIbe, discharged through a chute and fed to the screening apparatus constituting the present invention so to be quickly and properly graded and delivered at dilie'rent points for storage or otherwise.

One of the principal objects of the inventionis to provide a compound or doubleacting gyrating screening device having means for imparting a gyratory motion to all portions or the screens, whereby a thorough shaking or agitation of the coal or other material is obtained; the Wear'on the screen plates or jackets willbe uniform throughout the area thereof; clogging :of the perforations, or foramina of the screens will be prevented, the agitation takingjeffegct in all directions so that if pieces of the ma-, terial or foreign material accompanying the same should lodge in the perforations, they will be dislodged by engagement of the moving pieces therewith; l

A further object of the invention is to provide a screening device Which-is adapted to provide greater capacity, increased efficiency, less cost 'of installatlon, rip-keep and attention than, the screens now in gen eral use for sizing and disintegrating coal, briquette coal, stone, sand, ashes or any other similar material.

These objects, and other advantageous ends which will be described hereinafter,-'I attain in the following manner, reference being had to the accompanying drawings'in which 7 i Figure l is a planviewof the improved screening device,

Figure 2 is aside elevation of the device partlyin section,

Figure 3 is an end elevation xlooki'ng toward the discharge end,

Serial No. 557,549.

Figure t is a horizontal sectional View taken onthe line H of F igure-Qfand Figure 5 is adetai-l sectional'view 'showing a connection between a cable and a screen, taken onthe line V5"5 of Figure 3.

Referrin'gtothe drawings, my improved screening device is shown as embodying-a supportingstru'cture or frame F-which may be of any preferred constructiombut which is showmas comprising transverse base members or sills 5which may be of indefinite length and are arranged inspaced parallel relation to accommodate the length of each screening device, one'of which is herein described. Supported upon the base members is a longitudinal beam 6 and extending up from the base members are corner posts 7 against two of-wh'ich the longitudi'nal beam 6 is disposed, the uprights or corner posts 7 being connected by upper transverse frame members or" sillsrs "disposed above thebase members 5 and adapted to provide supporting means to sustain the weight of the screens suspended therefrom;

The corner posts 7 are connectechby' a longitudinal brace or beam 9 at one sideand a longitudinal beam 10 at the other side disposed in an elevated fpositio'n but' spaced-from the upper ends of the posts,-

relation. As shown, these screen frames lit) screen for grading and delivering the same in different sizes for storage or shipment as desired The ends of the transverse strips or braces 15, upon which the screen plates are removably secured as indicated at 20, are projected beyond the sides of the frames at each end as indicated at 21 so that any suitable suspending means may be connected thereto. This suspending means is shown in the form of flexible cables or steel wire ropes 22 looped at their upper ends as indicated at 23 and engaged movably in the hooks or U-shaped bolts 24 which are adjustably secured through the sills 8. he lower ends of the cables are also provided with loops 25, the extremities of the loops 23 and 25 being anchored by clamps, couplings or the like. The loops 25 are passed through the projecting ends 21 of the transverse braces 15 so as to be positioned in spaced relation transversely by reason of the braces of the upper screens 11' and 12 having less projection than the braces of the lower screens 13 and 14 where by the necessary clearance is provided to permit proper relative movements between the screens when gyratory motion is imparted thereto as will be later described. The braces to which the suspending cables 22 are connected, are preferably made up of two strips of angle iron 15 and 27 joined to produce a structure rectangular in cross section for encasing a wooden core 26, bolts 28 be ing extended through the sections of angle iron or core and through the loops 25 whereby the screens are suspended to be freely shifted in all directions, in a horizontal plane, and swing about in limited arcs allowed by the suspending means.

In order to impart a gyratory motion to the screens, suitable means is provided but preferably a shaft 29 is journaled horizontally between the corner posts 7 at one side of the frame, the flexible suspending means being so disposed as to support the screens slightly nearer the other corner posts so as to allow sufficient space to accommodate the shaft 29 which is journaled in bearings carried by the adjacent corner posts 7 and firmly bolted thereto in fixed relation to the frame. This shaft is adapted to be driven by any suitable means such as through the medium of a drive pulley 30 mounted on one end thereof and carries a pair of oppositely disposed miter gears 31 and 32 in fixed relation thereto adjacent the corner posts which support it.

Vertical bearings 33 are secured to the beam 10 and each has a pedestal provided with a bead or extension 34 at its upper end, resting upon the top of the beam. to support the bearings and pedestals rigidly in vertical positions where bolted to the beam. Vertical shafts 35 and 36 are journaled in the bearings 33 and at their lower ends are journaled in adjustable step boxes or bearings 37 mounted upon and secured to the longitudinal beam 6 and preferably provided with screw adjustments, oil pot, babbitted and having two hardened steel hearing buttons.

The upper ends of the shafts 35 and 36 are provided with beveled or miter gears 38 and 39 meshing with the gears 31 and 32 respectively so that when the shaft 29 is driven, opposite rotation will be imparted to the shafts 35 and 36. It will be noted that the screens are arranged in forwardly inclined positions parallel to each other, the upper and lower pairs of screen frames being connected through the medium of plates 40 having arms 41 provided with eccentric straps or collars 4:2 in which operate eccentrics 43 fixed to the respective shafts 35 and 36 in positions to correspond with the positions of the arms and straps.

The eccentrics which actuate one pair of screens are fixed to their respective shafts at an angle of 180 to each other so that the ends of the screens are simultaneously actuated in opposite direction, but the eccentrics which actuate an adjacent pair of screens are set at reverse angles so that the ends of each pair are actuated in reverse directions and the action of one pair counterbalances that of the adjacent pair. Actuation of the ends of a screen, or pair of screens, in opposite directions by means of eccentrics as positioned imparts a double gyratory mo tion whereby constant agitation of the material is effected and practically uniform wear on the screens is insured. The arrangement by which screens are actuated in reverse directions and the flexible mounting of the screens eliminates the vibratory and hammering action which usually results from the use of shaker screens.

In the operation of the device, the screens are supported in inclined positions as described and the rear ends and sides of the screen frames are closed against the escape or dropping off of the material while the lower ends are freely open so that the material may be delivered therefrom. The meshes or forainina of the screens are progressively smaller from top to bottom. Rotation is imparted to the shaft 29 as through the medium of the pulley 30 and by reason of the engagement of the gears 31 and 32 with the gears 38 and 39 respectively, the vertical shafts 35 and 36 are rotated in opposite directions in their fixed bearings. This results in the rotation of the eccentrics 43 and by reason of the screens being connected therewith through the medium of the straps 42 of the arms 41, opposite gyratory motion is imparted to the respective upper and lower pairs of screens. This results in the agitation of the coal or other material which is fed onto the upper screen and the smaller particles will pass successively through the lower screens, the particles which do not pass through the screens, tailing off at the lower or discharge ends and being delivered to suitable chutes. l/Vhile I have described my invention as taking a particular form, it will be understood that the various parts of my invention may be changed Without departing from the spirit thereof, and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come Within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Let ters Patent is l, A screening device including a flexibly suspended screen and means for imparting a gyratory motion to the ends of the screen in opposite directions.

2. In a screening device of the class described, a plurality of superimposed screens having foramina progressively reduced in size downwardly; flexible suspending means for the respective screens to permit independent relative movements thereof, and means connected near opposite ends of the respective screens for simultaneously gyrating the ends in opposite directions.

3. A screening device of the class described including a supporting frame; a plurality of sets of superimposed screens the frame; eccentrics on the shafts and set.

in opposite positions; straps engaged with the eccentrics and having connection with respective sets of screens, and meansfor rotating the shafts in opposite directions to impart opposite circular vibratory motion to the respective sets of screens and to cause the same to be shifted bodily.

5. A gyrating screening device including frames, one mounted above another and having grading screens therein; suspending means for the frames permitting relative movement thereof in all directions; an actuating shaft, and means operated by said shaft to impart independent compound gy-' rating movement to each of the screens.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HENRY WILLIAM FALKER.

Witnesses: a

HARRY Ron, I-IERHM LEFFLER.

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