US1085528A - Separator. - Google Patents

Description

A. BIGHETTI.

SEPARATOR.

APPLICATION FILED AUG. '1, 1911.

1,085,528. Patented Jan. 27, 1914.

8 SHEETS-SHEET 1.

BIGHETTI. SEPARATOR.

APPLICATION FILEDAUG. 7, 1911.

Patented Jan. 27,1914

8 SHEETS-SHEET 2.

0 0 0 (10 000 0 0 00- D MQMQM COLUMBIA PLANOGRAPH co, WASHINGTON, u. c.

UNITED STATES PATENT OFFICE.

ADELINO IBIGHETTI, OF SAN PAULO, BRAZIL, ASSIGNOR TO JOSE P. TEBYRIGA, OF SAN PAULO, BRAZIL.

SEPARATOR.

To all whom it may concern Be it known that I, ADELINO BIGHETTI, a citizen of Brazil, residing in San Paulo, Brazil, have invented a certain new and useful Improvement in Separators, of which the following is a specification.

This invention relates to apparatus intended primarily for size grading of materials, such for instance as coffee, rice, etc.

It comprises in general arrangement a series of overlapping spirally arranged separating screens of varying mesh, appropriate means for discharging the separated grains, means for preventing the clogging of the openings in the screens and means for imparting vibration to the latter: and also certain details of construction or arrangement hereinafter set forth.

In the accompanying drawing: Figure 1 is a side elevation: Fig. 2, a sectional plan on the line A, B of Fig. 1. Fig. 3, a view showing diagrammatically the arrangement of the screens. This view shows but three screens whereas in the machine as illustrated in other figures of the drawing there are six. Fig. 4: is a section'on line E, F, of Fig. 2: and Fig. 5, a partsectional plan view on line C, D, of Fig. 1.

The machine, as illustrated, is constructed as follows: A rectangular frame is composed of four vertical posts 2 connected and tied together by cross beams 4 and resting on basebeams 3. Centrally within this main frame is disposed the separator apparatus which comprises two rings 5, 6, in the open ings in which the upper and lower ends respectively of a central cylinder 7 are secured. The peripheries of the rings are connected at equidistant points by four angle iron braces 8. Coiled within these angle iron braces and secured thereto; concentric to the axis of the cylinder, is a spiral plate 9 of suitable pitch, the walls of which are vertically disposed. This frame, so constructed, is suspended from the top of the main frame by four flexible supports 10, preferably narrow flat spring plates. The lower ends of these plate springs are connected by Z plates 10 with the angle iron braces S. The screens 11, 11, 11 etc., are disposed at proper inclination or pitch between the band 9 and the outer face of cylinder 7, being appropriately connected to these parts by small angle irons 12.

The arrangement of screens will perhaps be best understood from Fig. 3. They may Specification of Letters Patent.

Application filed August 7, 1911.

Patented Jan. 27, 1914. Serial No. 642,605.

be made of any appropriate material but preferably each is composed of a sheet or sheets of metal having equally spaced, uniform openings, those of the upper or first screen 11 being larger than those of the next or succeeding screen 11 and so on. The upper screen 11 receives material to be separated from a hopper 13. All the grains or berries that do not pass through this screen to the next succeeding one are discharged into a trough 14, the rear wall 15 of which is carried upwardly to prevent material from overrunning the trough. The trough is disposed radially and has a downward inclination and connects, at its outer ends, with an opening in the band 9 to which is applied a discharge spout 16. Projecting backwardly from the trough 14 is a downwardly inclined plate 17 that serves to throw back grains or berries that have passed through the lower part of the first screen, so that all of the berries passing through the first screen are deposited upon an imperforate plate 18 that receives all the berries to be passed down along the second screen 11. These throw "back plates 17 permit the use of shorter screens than would otherwise be required. The receiving plate 18 and the second screen 11 are of the same pitch and therefore have a continuous surface of uniform pitch. The succeeding screens 11 etc.,'are provided with like receiving plates 18; and, in other respects, the construction is the same as that described in connection with the first screen, each having a similar discharge trough and associated parts. The apertures in the screens may be of any desired contour,that is to say, they may be circular, oval or of any conformation best adapted for the purpose of use. Separate means are provided for the reception of the graded material from each of the various spouts 16. That means may be a light flexible tube discharging into a suitable receptacle.

To prevent choking of the openings in the screens by lodging ofthe grains or berries therein, a means is provided by which the bottom surface of the screen may be swept by a wiper to throw upwardly any grains or berries that may be held in the openings. Such a device is provided for each screen. It may :be in the form of a roller pressed upwardly against the bottom of the screen,

or it may be a brush, or a flexible edge, such as leather or rubber. I have shown, however, a roller, the surface of which may be, if desired, of elastlc or fiexlble material such as rubber, leather or cloth. Rubber or like material is preferred and the degree of hard-' ness thereof may vary. It should not be too soft and preferably not very hard. A surface layer on the roller of rubber of about the hardness of that of an ordinary rubber hose is eflicient.

Loosely located within the upper end of the cylinder 7 is a spider 20 carrying downwardly extending rods 19, of which there is one for each screen, connected at their lower ends to a circular plate 21 arranged immediately beneath the lower end of the cylin der. .The spider, plate and rods constitute a rigid skeleton frame. On each rod 19 is fixed a sleeve 22 on the side of which is pivoted intermediate its ends a horizontally disposed lever 23, the inner arm of which carries a movable weight 2st and the outer arm passes through a slot 27 in the side of the cylinder of the same pitch as the screen. In the outer end of the lever is pivoted a yoke 25 in the ends of which is mounted a roller 26 arranged radially,that is, crosswise of the screen.

There is to be imparted to the skeleton frame, a reciprocating rotary motion and a reciprocating vertical motion. In order that berries or grains traveling down the screen shall not escape through the slots 27 into the interior of the cylinder, there is disposed around the interior of the cylinder a loose spiral fiat strip 28 coiled within the cylinder and turning in contact with its inner face. The levers 23 pass through apertures in this strip and through the slots 27 in the wall of the cylinder. On the lower face of the bottom plate 21 of the skeleton frame are journaled four equally distant rollers 29 that run upon four segmental cam faces 30 so that if partial rotation be imparted to the plate 21, the skeleton frame will be turned and raised and lowered and thereby cause the rollers 26 to travel in contact with the under face of their respective screens for the purpose stated. This movement of the skeleton frame may be effected as follows: Centrally of the cylinder is a shaft 31 having a bearing in one of the cross-timbers 4 at the top of the frame and a bottom bearing 32 on the under side of a fixed plate 33 that carries the segmental cam faces and which is fixed to the crosspieces a The spider 20 at the top of the central frame has rigid with it, a hub 34.- through which the shaft passes and with which it is united by a pin 35. The plate 21 forming the bottom of the skeleton frame has a similar hub 36 through which the shaft passes and to which it is pinned. On the lower end of the shaft 31 below its bearing 32 is fixed a radial arm 37, the outer end of which is connected by a ball and socket joint with a link or pitman-38 also connected by a ball and socket joint with a pin in the side of a gear wheel 39 operated as hereinafter described. As the gear wheel rotates, there will be a rotary and vertical reciprocatory motion imparted to the skeleton frame of which 21 is the bottom plate. The lift of the skeleton screen sweeping frame by the segmental cam surfaces 30 and the rotary motion of the frame are so related that the levers 23 travel freely in the slots 27, the levers carrying with them in their rotary movement around the axis of the cylinder the cover band 28 that closes the slots against the admission of berries or grains.

Provision is made for vibratory motion of the screens. Two opposite angle irons or braces 8 have jointed to them the ends of horizontal pitmen 40, the outer ends of which are connected with crank pins 41 on the ends of the main driving shaft 42 mounted in suitable hearings on the frame. This shaft may be driven by a belt passing around the pulley e3. The shaft carries also a pulley 4A belted to a pulley. d5 on a shaft d6 appropriately mounted in hearings in the lower part of the frame and carrying on one end a. pinion 47 that meshes with the gear wheel 39. Reciprocation of the two pitmen 4.0 imparts to the suspended skeleton frame lateral vibrations, the suspending spring arms 10 having suflicient resilience to permit of thismotion.

.The spirally arranged overlapping screens 11,11", etc., may be of uniform length or they may vary, such variations, if any depending upon the particular use to which the apparatus is to be applied.

This machine is very compact and requires but small floor space compared with the straight line screens that have heretofore been used. It is simple in construction, not liable to derangement and may be readily kept in order and repaired, when necessary, by unskilled labor.

The invention has been illustrated in a form deemed to be practical and efficient but is not limited to mere structural details as the general principle of the apparatus here set forth may be embodied by skilled mechanicians in other forms without de parture from the scope or general mode of purpose may be adopted. In other respects also the invention is not confined to the particular form in which the invention has been illustrated I claim:

1. Separator apparatus comprising a plurality of spirally arranged overlapping screens, one delivering to another below it, each provided with a separate outlet for material that passes over it and means whereby material passing through the lower portion of a screen is directed backward upon the screen next below.

2. Separator apparatus comprising a plurality of spirally arranged overlapping screens, one delivering to another below it and each provided with a separate outlet for material that passes over it combined with means for imparting vibrations to the screens and reciprocating means for sweeping the under side of the screens to displace materials that may be lodged in the apertures thereof.

Separator apparatus comprising a plurality of screens arranged spirally overlapping each other around a vertical axis, a trough for each screen to receive matter that passes over the screen and discharge it laterally, a plate projectingbackwardly from the bottom of each trough to direct material passing through the lower part of a screen ba-ckwardly upon the next screen below.

a. Separator apparatus having a plurality of overlapping screens arranged spirally about a vertical axis each having means for receiving and discharging material that passes over it and each having an imperferate plate upon which is received material passing through the screen immediately above.

5. In separator apparatus, the combination of a main frame, a vertically disposed screen support, a band spirally disposed around the screen support, means by which the screen support and band are held in fixed relation to each other and a series of overlapping screens arranged spirally around the screen support between it and the spiral band and respectively attached thereto at their edges.

6. Separator apparatus comprising the combination of a main frame, a screen frame comprising a centrally disposed cylinder, rings embracing and attached to the upper and lower ends of the cylinder, braces connecting the rings, a band encircling the cylinder and attached to said braces and a series of overlapping screens arranged spirally about the axis of the cylinder and between it and said band, each screen having means for discharging material passing over it and means for imparting vibrations to the frame and screens.

7 Separator apparatus comprising th combination of a main frame, a screen frame comprising a centrally disposed cylinder, rings embracing and attached to the upper and lower ends of the cylinder, braces connecting the rings, a band encircling the cylinder and attached to said braces and a series of overlapping screens arranged spirally about the axis of the cylinder and between it and said band, each screen having means for discharging material passing over it, means flexibly suspending the screen frame from the main frame and means for imparting vibrations to the frame and screens.

8. Separator apparatus comprising a series of overlapping spirally arranged screens each provided with means for discharging material passing over it, means by which said screens are flexibly suspended, means for imparting lateral vibrations to them, wipers for sweeping the under surfaces of the respective screens, supporting means for the wipers located within the spirally arranged screens and means for imparting to said supporting means vertical and rotary reciprocatory motions.

9. Separator apparatus comprising the combination of a plurality of overlapping spirally arranged screens, wipers sweeping the bottoms of the screens, levers upon which the wipers are mounted, means for yieldingly pressing the wipers against the bottoms of the screens, supports for the wiper levers located within the spirally arranged screens and means for imparting to the wiper support vertical and rotary reciprocatory motions.

10. Separator apparatus comprising the combination of amain frame,ascreen frame comprising a cylinder, rings surrounding the upper and lower ends of the cylinder, braces connecting the rings, means for flexibly suspending the screen frame, a plurality of overlapping screens arranged spirally about the cylinder, askeleton frame located within the cylinder, levers carried by the skeleton frame and extending through slots in the cylinder, screen wipers carried in the outer ends of the levers, means for forcing them against the under surfaces of the screens and means for imparting to the skeleton frame vertical and rotary reciprocatory mo tions.

11. Separator apparatus comprising the combination of a main frame, a screen frame comprising a cylinder, rings surrounding the upper and lower ends of the cylinder, braces connecting the rings, means for flexibly suspending the screen frame, a plurality of overlapping screens arranged spirally about the cylinder, a skeleton frame located within the cylinder, levers carried by the skeleton frame and extending through slots in the cylinder, screen wipers carried in the outer ends of the levers, means for forcing them against the under; surfaces of the screens, means for imparting to the skeleton frame vertical and rotary reciproca-tory mo tions and means for vibrating the screen frame.

5 12. Separator apparatus comprising a series of overlapping screens all having inclination in the same direction and also having respectively imperforate plates at their upper ends for receiving material passing 10 through a screen above and means for directing material that passes through the lower part of one screen backwardly upon the imperforate receiving plate of the screen below.

In testimony whereof, I have hereunto 15 subscribed my name.

ADELINO BIGHETTI. Witnesses:

MARIO WV. TEBYRI A, Jose BRAZILEIRO.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patentl, Washington, D. G.

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