US1574722A - Bran duster - Google Patents

Description

A. WOLF BRAN DUSTER Feb. 23 1926. 1,574,722

Filed March 15 1924 2 Sheets-Sheet 1 patented Feb. 23,1926.

' ed a relatively largebearing 1,1 for arotary- UNITED STATES AUGUSTUS WOLF, OF CHAMBERSBURG, PENNSYLVANIA.

BEAN DUSTER.

Application filed March 13, 1924. Serial No. 698,945.

To all whom it may concern: Be it known that I, AUGUSTUS vVo'nr, acitizen of the United States, residing in Chamliersburg, Pennsylvania, have invented a Bran Duster, of which the following is a specification.

One object of my invention is to provide a machine particularly designed to bolt out the heavier particles from grain which has been suitably crushed in a mill with a view to separating such particles which constitute the flour from the light fibrous elements.

Another object of my invention is to pro- These objects and other advantageous ends I attain as hereinafter set forth reference belng had to the accompanaying drawings,-111wh1ch,

Fig. 1 15am end elevation-of a bran duster constructed in accordance with my inven-' tion,

Fig. 2 is alongitudinal vertical section on the line 2-2, Fig. 1;

Fig. 3 is a transverse vertical section on the line 33, Fig. 2;

Fig. 4 is an enlarged View illustrating the action of the brsuhes;-and,

Fig. 5 is a sectional perspective view of one of the ribs of the reel..

In the above drawings, 1 represents the flat top and 2 and 3 the removable panel sides of the body of my bran duster which includes also two relatively heavy side frame members .4 and 5 and a longitudinally extending inclined bottom 6-6 This body with said frame members is supported-on two pairs of standards or'legs 7-7 of which those of each )air are braced together by transverse mem ers 8. The body of the machine" includes also two vertically extending ends 9 and 10, in the first of which is mountsleeve 12, while the second end 10 likewise T has mounted in it a bearing 13 for an elongated sleeve 14. The sleeve 12 has mounted upon or formed integral with it a pulley or sprocket wheel 15 connected by a chain or belt 18 with a second'sprocket or pulley 16 fixed to a shaft 17. The latter is journaled in the bearings 19 and 19 supported by the lower portions of the end members 9 and 10 and likewise has fixed to it a second and larger sprocket or pulley 20 connected bya chain or belt 21 with a sprocket ,or pulley 22. i

The frame members 4 and 5 are preferably extended beyond the end members 9 and 10 of the machine and. at one end thereof are connected by a cross beam 23 ;-'at the opposite end being likewise connected by a second cross beam 24. As shown in Fig. 1,

these cross beams are centrally made with open octagonal portions in each of whichis mounted an octagonal box25 serving to rotatably support a shaft 26 which extends longitudinally through the machine from one end to the other. This shaft has fixed to it the sprocket or pulley 22 preferably between one of the boxes 25 and the adjacent end member 9 of the machine and outside of said box has fixed to it a driving pulley 27 designed for connection with any suitable source of power.

W'lth the above described arrangement of parts, rotation of the shaft 26 by the pulley 27 likewise causes rotation of the sprocket or pulley 15 and the sleeve 12 to which it is attached; the parts being so designed that said sleeve turns at a hi her rate of speed, for example, four times tTlEti) of the shaft 26.

The two sleeves 12 and- 14, both of; which extend within the casing of the machine are provided with outwardly extending radial arms respectively carrying rims 28 and 29, which are flanged away from each other, and are connected by longitudinally extending ribs All of these ribs are connected and supported intermediate the heads provided by the sleeves 12 and 14 and their arms, by hoops or rings 31 and each of them has mounted upon it a longitudinally extending externally convex strip 32 for the reception the bran is held by the corrugation until the brush removes the bran from the ribs.

Upon the shaft 26 is a pair of oppositely facing, outwardly flanged collars 34 and 35, so placed as to abut uponand close the inner ends of the two sleeves 12 and 14 and there is suitable packing, such as felt cloth, mounted between these collars and said sleeves to prevent the escape of material from the interiorv of the reel into them. Also mounted bGlZWCGlLlZllQ shaft 26 within the reel and between the two collars 34 and 35 is a pair of hubs carrying arms 36, to which are bolted or otherwise suitably attached a suitable number, in the present instance, three, of longitudinally extending bars 37 carrying brush bristles and them selves .constituting brushesextending prac- 1 tically from one end of the reel to the other. These: parts 3.? are so arranged as to be inclined at a slight angle to the axialline of the reel so that when rotated in the direction which is counterclockwise when viewed from the right-hand end of the machine, they cause the contents of the reel to be progressed from the left to the right-hand end thereof. The diameter of the cylinder described by the brushes when these are rotated with the shaft 26 is slightly less than that of the cloth or screen of the reel but by means hereafterdescribed the shaft with the brushes is displaced to one side of and slightly above the axis of said reel, so that said brushes are engaged by thecloth or screen or any part thereof under operating conditions, p

vI also prefer to provide a plurality oflongitudinal radial blades which are carried by the shaft and which extend substantially the entire length .of the reel. These blades may be variously; formed and mounted, but I prefer and have shown blades 38 which are entirely independent of the brush bars 37, butwhich are mounted on the aforesaid arms 36 of the shaft 26. These blades are mounted between the brushes and extend for practically the entire length of the reel and like the brushes, inclined at an acute angle tothe line of the shaft 36. These blades, as-sho'wn in Fig. 3, extend radially and move in a cylindrical path somewhat less in diameter than that of the brushes 27, being intended not only to insure flow or movement of material within the reel from the left'to the right-hand thereof, but also being intended to prevent said material from compacting and cause its rotation at a high velocity so that its heavier particles will tend to move outwardly together with the air under the action of centrifugal force, thereby separating light foreign particles.

Atthe left-hand end of the machine, there is an inlet opening 40 provided in the end wall 9. through which material to'betreated is delivered from a receiving hopper 41 so asto pass through the head 28 into the interior of the reel.

At the opposite end of the machine, there are mounted on the'sleeve 14 and on the head 29 a series of curved scoops 42 designed to collect material from the adjacent endof the reel as the latter is rotated and deliver it through said head 29 into a space 43, from whence it is delivered from the machine through a discharge opening 44. Material passing through the cloth or screen of the reel is delivered by the inclined sides 6 into an elongated trough 45 extending longitudinally of the casing of the machine and from this is delivered from any suitable conveyor or receptacle.

The position of the shaft 26 with its brushes and conveying blades is adjustable within the reelby'reason of the fact it is carried in the boxes 25 which in turn are supported by adjustable set screws 46 passing radially through the octagonal bearing rings 23 and 24 as shown in Fig. I. Said screws are so positioned or set up that under conditions of operation the brushes 37 will engage and clean the inside surface of the cloth 33 of the reel along a longitudinal line thereof, preferably to one side of the middle of its top.

For cleaning the outside surface of the screen or clothof the reel, I provide a brush 50 mounted on a shaft 51 journaled; in the end members 9and 10 of the casing and extending substantially parallel with the shaft 26 as shown in Fig. 3; there being preferably two oppositely extending sets of bristles set in said brush. The shaft 51 extends outside of the casing and carriesa pulley 52 for the reception of a belt 53fwhereby it is driven by power from a second pulley 54 on the shaft 26. The pulleys 52 are preferably of the same diameter so that the shaft 26 rotates at the same speed as the shaft 51 with its brush 50. Atthe' same time, the reel is preferably run at a speed approximately one-quarter that of the shaft 26 and its brushes, so that the latter with the, brush 50 elfectually keep clean both the internal and external surface of the cloth or screen, maintaining it in a condition of maximum effectiveness.

The material introduced into the hopper 41 enters the rotating reel, where it is re volved at a high rate of speed by reason of the action of the blades 38 and the brushes 3?. Under the action of centrifugal force its heavier particles are separated from the lighter particles and, if of the proper size, pass through the cloth or screen and fall into the trough 45 of the machine. The branwith light flour dust is conveyed by the brushes :and blades of the reel longitudinally thereof and is ultimately picked up by the scoops 42 which discharge it from the machine through the space 43 and outlet 44 thereof.

It is to be noted that by reason of the adjustment of the brushes, the latter do not interfere with the masses of material under treatment in the lower part of the reel, since at this portion of the latter, said brushes clear its surface by a considerable distance. On the other hand, the cloth or screen of the reel is engaged by the rapidly rotated brushes both externally and 1nternally at portions which are relatively inactive; i. e., the upper parts thereof, Where particles of adhering material or particles which have lodged in the screen are effectually dislodged so that the latter is kept at all times in condition of greatest effectiveness.

By the means above described the machine may be adjusted With the utmost nicety to operate in the most eflicient and satisfactory manner, so that it will continuously act at full capacity to separate the flour and other valuable constituents of the grain from the bran, flour dust, and light undesirable foreign particle ordinarily mixed With it.

I claim:

1. The combination in a bolting machine of a casing; a reel rotatably'mounted therein; a brush rotatably mounted within the reel and positioned to operate on portions thereof adjacent its top; a second brush positioned to operate on the outer surface of the reel along a line directly opposite the line of engagement of the inner brush;

2. The combination in a bolting machine of a casing; a reel therein; two brushes positioned to operate opposite one another respectively on the inner and outer surfaces of the reel; with means for rotating the brushes and the reel.

3. The combination in a bolting machine of a casing; a reel therein; two brushes posi- I tioned to operate opposite one another respectively on the inner and outer surfaces of the reel; means for radially adjusting the inner brush toward or from the inner surface of the reel; and means for rotating the brushes and the reel.

4. The combination in a bran duster of a casing; a reel having two sleeves rotatably mounted in the ends of the casing; a shaft passing-through said sleeves; a brush on the shaft; means for adjusting the shaft laterally to cause the brush to engage the upper portion of the reel; With collars on the shaft positioned to prevent escape of material through said sleeves.

5. The combination in a bolting machine,

of a casing; a reel therein having a series of longitudinally corrugated ribs for holding the bran; and a rotating brush carrier, having brushes arranged to engage the upper inner portion of the reel and to remove material from the corrugated ribs, said brushes being clear of the lower por tion of the reel.

AUGUSTUS WOLF.

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