US1384312A - Feeder or regulator for screening apparatus - Google Patents

Description

e. H. FRASER.

FEEDER OR REGULATOR FOR SCREENING APPARATUS.

APPLICATION FILEDJUNE1'1,I915.

1,384,31 2, Patented July 12, 1921.

4 SHEETS-SHEET 2 INVENTOR WITNESSES: 4% 7 WWW G. H. FRASER.

FEEDER 0R REGULATOR FOR SCREENING APPARATUS.

APPLICATION FILED JUNE H. 1915. 1,384,312, Patented July 12, 1921.

4 $HEET$-SHEET 2- j y. 4 -3 INVENTOR WITNESSES: M

e; H. FRASER. FEEDER 0R REGULATOR FOR SCREENING APPARATUS.

APPLICATION FILED JUNE 11, 1915.

1,384,;3 1 2, Patented July 12, 1921.

4 SHEETS-SHEET 3.

G. H. FRASER. FEEDER OR REGULATOR FOR SCREENING APPARATUS. APPLICATION man JUNE 11. 1915.

1,384,3 1 2. Patented July 12, 1921.

4 SHEETS-SHEET 4- I 2 E 4. u; D H X Toy-f? --3 I INVENTOR WITNESSES: yak 7W AW X4 flam/ ENT OFFICE.

GEORGE HOLT. FRASER, OF BROOKLYN, NEW YORK.

FEEDER 0R REGULATOR FOR SCREENING APPARATUS.

Original application filed. June 15, 1906, Serial No. 321,856.

68,919. Divided and'this application To (ill whom it may concern:

Belt lrnown that I, GEORGE Hour FRASER, a citizen of the United States, residing in the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Feeders or Regulators for Screening Apparatus,'of which the following is a speci{ fication.

This application is a division of my application for improvements in screening apparatus filed June 15, 1906, Serial No. 321,856. r

This invention relates to feeders or dis tributers for such devices as screening apparatus, and especially to apparatus of this character in which the material to be screened orsized is allowed to flow down an inclined screen through which the smaller particles fall to a line outlet, and over which the larger particles flow to a coarse or tailing outlet.

Apparatus of this kind is used with one or more inclined screens, either stationary, vibrated, or jarred, inclosed in a casing, and used with a distributer for spreading the material to be screened over the upper part of the screen.

My invention aims to provide various improvements in apparatus of this general character, which will be hereafter more fully set forthwith reference to the accompanying drawings, in which- Figure 1 is an end elevation showing the preferred form of my invention;

Fig. 2 is a rear elevation thereof partly in vertical longitudinal section on the line 22 in Fig. 1, and looking in thedirection of the arrow;

Fig.3 is a vertical cross-section thereof cut on the line 3-8 in Fig.2 and looking in the direction of the arrow, and partly broken away, and y i Fig. 4 is a fragmentary vertical section looking in the direction of the arrow.

Referring to the drawings, A is the main body, B are its feet, C are its legs, D is the feeder body, E is the hopper, and F is the driving shaft. Within the body A is screening member Gr, beneath which is the fines outlet, H, and in front of the lower end of which is the coarse outlet 1. At the top of the screen is the inlet J, above which is a conveyer or other distributing feeder K. The material entering through the hopper Specification of Letters Patent. 1

- formed in the body,

, and above the covers a Patented J uly12, 1921.

Renewed December 27, 915; Serial No. filed June 11, 1915. Serial No. 33,464,

E isfdistributed by t io conveyer K througl'iout the length of the inlet J, from which it flows on to the screen G, down which it runs, the fines falling through and escaping through the fines outletH and the coarse flowing down and passingout of the coarse outlet i y 1 i As thus far described the parts may be of any usual or suitable construction;

According to the preferred form ofmy invention, I provide an improved construction for the main body A the feeder D, an improved vibrating mechanism '11, and I provide various details of improvement in construction, arrangement and operation, all of which willbe more fully hereinafter set forth. v l The body A consists of a tubular casing of substantially rectangular cross-section, closed at front by a front door a, which slides or is adjustable vertically in grooves and at rear by a hinged rear door 5, which body has an open top beneath the feedenand an open bottom at its frontend for the outlets, andispivotally mounted on its feet B atfront pins cor otherwise, and adjustably connected tothe legs C by pinsrZ-or otherwise, so that the angle of the body can be set at the degree of inclination desired. The body A is preferably coinposedof two identical ends 0 of cast or other metal, united at their lower front part by a cross-pieceor angle bar 7, at the lower part of their rear ends by a bar 9, at top by a eross-piece or angle bar h at rear-and i at front, and at their lower front end cross-piece or angle bar 7', which connections preserve the two sides in suitable relation. The top and bottom sides of the main casing are preferably both closed by removable walls or-covers, the top by sheet metal covers Z which have edges reinforced by angle irons m at bottom, and v by Z-bars a at top, which are fitted together at their edges to holdthe covers in place and prevent leakage of dust; Another Z-bar n is carried by the casing below the covers,

corresponding angle bar or is carried by the casing, to which bars the adjacent edges of the covers are-fitted. By this construction any cover may be easily removed to get-access to the screen member from infront. At each end each cover is alsoclamped by a swinging clamp 79 pivoted to the end wall. 6;.

The bottom of the main body is a movable or removable 'door M', according to my invention, and preferably consists of a me tallic frame N composed of upwardly 6X- tending angle bars 9 connected at top by a T-bar a" and at bottom by an angle bar 5, and carrying a sheet metal covering Q) and w closing the rear or bottom wall of the body. The door M preferably fits within the end walls and is pivoted thereto near its lower end by the pins 5', so that its upper end can be swung downwardly to give access to the interior from the rear. It makes suitably tight connection with the end walls by contact of its frame with the shoulder a therein, and with the bar. by contact of the bar r therewith, and it is held in the closed position in any suitable manner, as by the gravity clamps p with which the top and bottom edges of the ends c are provided. The outer. face of each end 6 is cast with a flange a3 fitting against the inner face of the feet B at the lower end, and the inner face of the leg C at the upper end, and with lug-s 3 for connecting the feeder to these ends, and with cars a for carrying the clamps.

The screen member preferably mount-- ed on the movable baclrM so that it can be removed or lowered "with this back for giving access tothe. screens. it. may be mounted directly on the frame N,but T for to support it movably thereover by a yielding frame I carried from the train N by springs O and I prefer to providea plum, rality of screen members G separably con-- nected to the frame P, as by sliding them therein from the rear end, so that any one may be removed for repair either by sliding; it out rearwardly without lowering the baclr door, or by lowering this door and then sliding it out, or by removing; its clamps R and lifting it out. As shown, a number of chain nel bars a are carried by the frame N, and the springs Q are mounted on these and on. the end angles 1, and the frame P consists of a number of inverted; channel bars 5 cmbrac'iig the upper ends of the havingtheir ends connected by angle bars 0 embracing posts 0 at the top and bottom of the bars a, for slidingly supporting the s reen frame. 'The clamps E between the screen members G are-shown as each con strap iron sisting of a straight bar 0' of connected to theframe P by a bolt 7, and over each bar 7c the clamp consists of an inverted angle iron g. {IO through the leaf springs Q, to retain these in place. 'The upper end of each screen member G has a downwardly projecting portion a h" which hangs on the screen 7 frame P. Y

The screen may be moved, jolted or vibrated in any usual or suitable way, but I prefer to use the vibrators L which consist of a plurality of knockers i loosely on feed from either the rear springs and and forwardly on to the top The bolts f may elastically connected by spring arms j and holders k, with shafts Z which extend through bearings in the end walls 6, and are oscillated by arms m which are connected together by an adjustable link a, and are connected by a link 0' to the strap 7) ofan eccentric S driven from the shaft F, This eccentric has a throw suihcient to cause the knockersto move ightly farther than necessary for them to hit the clamps E over the screens, so that the lrnockers hit these clamps a suitable blow, and the elastic bars 3'' yieldsulhcientlyto make up for any additional oscillation "of the knoclrer shafts. The spring mounted screen frame may yield slightly under. this blow, so that the screen will be jarred byfthe blow as well as slightly moved thereby. This jarring will be sufficient to prevent clogging of the screen, and to facilitate downward'flow of material thereover.

Leakage between the end walls 0 and the side bars of the screen frame may be prevented in any usual or suitable manner, but I prefer to cast the inner face of the end walls with a pocket 9', and to mount on this face and in this pocket a yieldingdust bar or plate T, which may be clamped against the end wall with an intervening packing strip, or may be sprung. or pressed out wardly from this wall in' such'manner as to bear against the side of the screen frame and prevent leakage at this point, but which is 'eferably aspring pressed. bar slidingly mounted in the pocket as shown.

"The inlet J is directly above the screens, and preferably consists of two removable deflectors, the one U being inclined downwardly and forwardly and resting: on and lapping the top of the screen for a suitab c distance, andthe other V being inclined downwardly and rearwardly and terminat in a suitable distance above the defle tor U to ive the necessary clearance for the inlezf J, these deflectors being so disposed'that or the frontsidc of the feeder will be directed downwardly of the screen. The deflectors are removable through the feeder casing, and are carried by a cast iron carrier W bolted to the inner'face of each end wall 0-. This carrier has flanges "r projecting inwardly from the end walls to prevent leakage past the ends of the deflectors, which flanges are notched near the bottom'to permit the deflectorU to pass downwardly, and are provided with'a curved wall 8 for directing material on to the deflector llf that it is driven, thus metal end walls X connected by angle irons if, closed at top by a removable and reversible sheet iron. top wall a from one extremity to the hopper E, which latter is re movably and reversibly mounted and closes the remainder of the top, closed at front and and removably bolted to rear by doors a), the top of the body A. The distributing conveyer K is-reversible both in position and drive and extends from end to end of the feeder casing, and beneath the conveyer the feeder has a-removable and reversible trough Y flanked on each side of the conveyer by aremovable and reversible adjustable feed plate Z, which is mounted to be tilted to'the necessary angle to cause the material distributed by the conveyer to flow out of the trough in substantially uniform quantity throughout its length. My invention provides a removable and reversibly inclinable feed edge, preferably an adjustable plate at each side of the conveyor, and a clearance or discharge outlet at each side, so that the conveyer may discharge to the front or to the rear as desired, according to the direction avoiding the necessity for reversing the feed hopper or for using a left hand conveyer. The trough Y is a plate having upwardly bent edges, and is supported from lugs within the casing I) by two transverse angle bars, or is otherwise suitably constructed, and has inclined sides to which the feed plates are applied.- The end plates X are formed with correspondingly inclined internal flanges 20' for sup porting the trough,

angle bars supporting the trough.

he eccentric S has a shoulder against which the eccentric strap 72' bears, and on its outer end the eccentric is covered with a dust plate 00 which protects it from dirt. The strap is provided with an oil well, and each of the bearings are likewise provided for lubrication. The bearings 7 for the driving shaft F are spaced apart at e from the wall to permit any dust which may escape from the feed casing along the shaft to fall downwardly instead of entering the bearings. The feed hopper E is-formed with a depending flange a at each side to prevent material from jumping across from the hopper directly over the feed board, and with a vertical neck 5 to direct the feed downwardly'on to the conveyer.

The legs C are formed with a plurality of holes through any may be passed to supportthe body A from the legs at the desired angle. l

Each end piece 6 is formedwith a .projecting ear (2 which laps the side wall v of the bottomdoo'r bland has a curved edge struck from the centerof the pivotal pin 25, and the lower edge of theside wall 4) ex and feed plates, on the lower ends of which flanges are lugs for the 'nal pockets in the ends 6 are of which the bolts (Z tends out under the projection (Z to prevent leakage beneath the latter at the sides.

The angularity' of the screen Gwis fixed relatively to the body, and its steepness is adjusted by adjusting the entire body until the desired angle for the screen is obtained, but I prefer to construct the bottom M of a greater steepness than that of the screen in order to insure free flow of the screened material, which owing to its fines is not likely to flow as freely as the coarser material. i

The posts 0 will project in. the direction in which it is desired that the yielding frame P shall reciprocate, and are formed with slots through which are passedbolts it in the ends of the frame P, which bolts act as stops to arrest the upward movement of this frame, while permitting it to freely clescend when the springs are compressed. Thus the frame P slides up and down'on the posts in its movement under the action of the mechanism L, and is abruptly stopped at a predetermined point; in its upward movement. The effect ofthis isto permit the material on it to rise and to jar out of the meshes of the screen any pieces that may have wedged therein.

When an end motion or knock for the screen is desired, thismay be attained in any suitable manner, but I prefer to put a cam 2' on the lower side of the oscillating arms, and have it run against a roller'j fastened to the adjacent end dust bar T, and passing through slots in the ends c, and to provide springs for pressing the screen toward this roller. The roller rides up the bevel of the cam and compresses the spring, and when the roller passes to the opposite side of 'thecam, the springpresses the screen back until its roller strikes the cam, thus giving it the desired movement and jar transversely of the flowing material. The cam 2' can be on the eccentric S and work a lever.

To provide for this end motion, the interpreferably deep enough to give the necessary clearance for end motion, and the side dust plates are angle or channel bars sliding in these pockets and having flanges of sufficient width to allow for the desired motion without escaping fromthe pockets. g c

The vibration of the screen insures flow of material down itwhen it is relatively flat, but asthe bottom is, without vibration, the fine material is liab e to stick thereon unless the angle'is'relatively steep, and to avoid this my invention provides a greater angularity for-the bottom wall than for'the screen. l c

In operation; the driving pulleyc being on either end of the shaft F, and the eccentrio and arms m" beingon the other end, the feed hopper will be placed at either end flector U, slide down of. the feeder accordingto convenience, and the conveyer K Wlll be driven in such d1- rection as to ropel the material fed through the trough toward the other end of the machine. The feed board Z at the side of the conveyer where the flights are rising will be tilted until the material flows over its edge in a substantially uniform volume from end to end. This will be determined by opening'the front or rear door of the feed casing and adjusting the feed board by hand until a satisfactory distribution of material is obtained. If the feed is flowing over the rear board it will fall on the dethis'on to the screen G, and flowzover and through the latter, the coarse goin to the outlet 1 and the fines to the outlet 1%. If-the feed isover the front board Z it will fall on to the deflector V and slide rearwardly down this until it falls on to the deflector U, fromwhich it will slide on to'the screen. The screen vibrates the deflector U.

Atthe end of the trough remote from the hopper the trough is usually formed with an opening Z to permit escape of which has not been thrown over plate. here, which preferablyconsists of the bent down portion of the metal cut from the trough, which is bent at an angle todirect the material falling through this opening obliquely, either back toward the middle of the screen, or laterally toward the front or rear deflector plates, thus preventing such material from flowing down close to the edge of the screen. f

Ifvibration of vibrating mechanism the screen is desired, the L will'be connected to the screen and adjusted to knock with the desired force. Tn ,such case the strikers i" will pound the screen clamps with equally rapid blows, and the screen will vibrate sufficiently to keep itself clean and to cause the material to flow rapidly. The springs Q will yield slightly under this vibration, an the knocker straps 9' will flex slightly, thus providing for a slight lost motion effect.

To inspect the surface of thescreen, one or both doors Z may draw or repair any screen frame, the clamps R over it may be loosened, and it may be drawn out bodily through the back door 7) by slightly lifting entirebottom M with the screens and screen frames may be oscillated downward by releasing the clamps 79, and any ofthe screens may be repaired in. place, or may be slid outward, or lifted out and recovered. On reassembling the screens, the hinged bottom M can be closed up and clamped, and the machine is again ready for operation.

Where great steepness is desired for the screen, the body can be adjusted upwardly and thebolt d fastened in one of the upper.

'will rock on the pin 0 material the feed I provide an mclined deflector m be removed. To withthe deflector U, or thedictate, without If less steepness is desired, the body to one of the lower holes The front end of the body throughout these adthe side walls holes. can be connected 0 of the leg C.

justments without clearing of the feet B, which walls serve from the feet and folded upon top of ,the,

feet, whereupon the whole can be crated with great compactness; or where even a closer packmg is desired, the feed casing D w1th to prevent escape of dust at the sldes of the separator] its inclosed parts can be separated from'the 7 body and shipped separately. 7 If desired the casing A can be taken apart and shipped in pieces, all the parts being separably connected together to facilitate this.

It will be noted that the angles t of the V I lower corners of the feed casing are so disposed that they form shelves on which the material can buildup to seal the joint at the lower edge of the front and rear doors '0, and'thus prevent leakage beneath these, and that the bar 9 is so arranged that dust can accumulate above it and seal the joint at the bottom of the door I), and also that the angle 0 is adapted to collect a body of material to seal the joint between itself and the angle 2' at the front of the body A.

it will be seen that my invention prorides a feeding apparatus which is simple, strong and compact, and which combines easy accessibility with a wide range of adjustment; also that it provides a device which can be driven in either direction and for reversing any of the parts, and one in which the mere shifting of the feed hopper from one end to the other suflices to adapt the machine for. receiving at eitherv extremity. i

It will be understood that my invention is. not limited to the particular details, of construction, combination of parts, or method of operation, shown as constituting its preferred form or adaptation, since my improvements can be availed of in whole or in part according to herein set forth and such modifications as circumstances or the judgment of thoseskilled in the. art may departing from the spirit of my inventlon. That I claim is r 1.. In combination, housing means afford ing an elongated distributing chamber, a

reversibly revoluble longitudinally feedingv nally of each of said conveyer an adjustable discharge edge extending longitudinally of said coni veyer and spaced apart from the longitudinal Walls of said chamber to "afford a passage at each side of said trough for material distributed by said conveyer, and adjusting means for adjusting said adjustable means respectively.

2. In combination, housing means affording an elongated distributing chamber, a reversibly revoluble longitudinally feeding laterally discharging distributing screw conveyer mounted in said chamber, stationary means comprising a member below and atfording a trough for said conveyer affording a discharge outlet extending longitudi sideof said conveyor, movable means movably mounted relatively to and at each sideof said stationary means and extending longitudinally ofand at each side of said conveyer for varying saidoutlets and spaced apart from the. longitudinal Walls of said chamber to afford a pas veyer mounted in said ,ternal Walls of sage at each side of rial distributed by said conveyer, and means for moving said movable means to vary said outlets.

3. In combination, housing means affording an elongated distributing chamber a reversibly revol'uble longitudinally feeding laterally discharging distributing screw conchamber, stationar means comprising amember below and atfording a trough for said conveyer afl'ord- .ing a discharge opening at and extending longitudinally of and at each side of said conveyer, inclinable ad ustable means adustably mounted as to said trough at and extending longitudinally of each side of. said conveyer respectlvely and reversibly 1n- I clinable to reversely vary said outlets re spectively and spaced apart from the in said housing to afford a passage at each side of said trough for material distributed by said conveyer, and ad-" justing means for adjusting said inclinable means relatively to said trough.

In Witness whereof, I have hereunto signed my name in the presence of two subscribing Witnesses, V

GEORGE HOLT FRASER.

Witnesses SIGVARD G. HELLEM, GUsTAv SoHoNHnrr.

said trough for mate-

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