US1522456A

US1522456A - Roller mill

Info

Publication number: US1522456A
Application number: US247560A
Authority: US
Inventors: Charles T Howson
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-07-31
Filing date: 1918-07-31
Publication date: 1925-01-06
Anticipated expiration: 1942-01-06

Description

Jan. 6. 1925. 1,522,456

C. T. HOWSON ROLLER MILL Filed July 31, 1918 9 Sheets-Sheet l @Elim Ja,5.1925. L 1,522,456

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. C. T. HOWSON ROLLER MILL sued July 51. 1918. 9 sheets-sheets v 76 as Jan. 6. 1925. 1,522,456

- c. T. HowsoN ROLLER MILL Filed July 31, 1918 9 Sluaets-Sheet 6 6 5 4* 2 2 5, l .N -O S w O H T. C. 5.` 2 9 am m a 1J ROLLER MII Filed July 31, 1918 9 Sheets-Sheet '7 HR ausw figarzesywmn, A tgl/2J g A DNI C. T'. HOWSON ROLLER MILL Filed July 31, 1918 9 Sheets-SheetL 8 MQW@ mvI/lk Jan. 6. 1925. 1,522,456

' c.-T. HowsoN A ROLLER MILL Filed July 31, 1918 9 Sheets-Sheet, l9

Patented Jan. 6, 1925.

UNITED STATES CHARLES T. HOWSON, 0F SLVER CREEK, NEW YORK.

ROLLER PJIILL.

Application :filed July 3i, i918. Serial No. 247,560.

To @ZZ whom t may conce/m.'

Be it known that l, CHARLES T. HowsoN.I a citizen of the United States,residing at Silver Creek, in the county of Chautauqua and State of New York, have invented certain new and useful improvements in Roller Mills, of which the following is a specification.

This invention relates to mills, and more particularly to that type known as self-contained roller mills in which the constituent parts are coniined within a single enclosure, and into which the grain is introduced and operated upon in .its vflow through the mili and discharged in the i'form of iiour with the oii'al discharged through a separate exit or exits.

One oi the objects of my invention is to provide a mill of this type in which the separation ot' the ground stock .is greatly simpli tied and by means ot which a high yield ot' flour is secured.

Another object of my invention is the construction of a flour mill in which the bran is separated from the fiour during the initial portion oi the flow of the stock through the mill so as to avoid its coming in contact with the Hour in the bolting reels and to prevent its entering said reels, which are silk or wire-covered, this being highly desirable since the action of bran on the silk or tine Wire ot' the reels would quickly cause holes to be worn therethrough.

Another object of my invention is the provision oi' a dust collecting device which is cleaned automatically, thereby aliowing increased suction over existing mills without drawing off good YHour, which results in more eifective cooling and Ventilating conditions within the mill and avoids what is generally termed sweating Another object oi" my 1invention is the provision of a mill having v in/iproved centrifugal reels tor scalping, grading and dressing the Hour.

Another object of my invention is the provision of bolting reels which are removably arranged within the housing of the mill and capable of being removed therefrom through the tail end of the machine without disassembling 'the parts thereof and without separating any parts of the housing eX- cept the bearing members for the shafts of the reels.

Further objects of my invention will appear from the description to follow.

The invention consists inthe novel fea` tures of construction'and in the arrangement and combination of parts to be herein after described and more particularly pointed out in, the ksubjoined claims.

in the drawings I have illustrated one embodiment of my invention, vand in said drawings,

Fig. l is a head end elevation of my improved mill.

Fig. 2 is a tail end elevation of the same.

Fig. 3 is a side elevation of the mill with the enclosing walls removed from the frame and portions of the conveyer tubes broken away to show portions of the conveyers therein.

Fig. 4 is a longitudinal section taken on the irregular line o o, Fig. 5.

Fig. 5 is a transverse section on an enlarged scale taken on line -Z), Fig. 3.

Fig. 6 is a transverse section on an enlarged scale taken on line 0 0, Fig. 3, looking toward the left.

Fig. 7 is a transverse section taken on line Z-fZ, Fig'. 3.

Fig. 8 is a transverse section taken on line 6-e, Fig. 3.

F 9 is a transverse section taken 4on line 0 0, Fig. 3, looking toward the right.

Fig. 10 is a longitudinal section taken on line f-f, Fig. 7, looking toward the lett.

Fig. ll is a sectional elevation of one of the roll adjusting devices viewed 'from the inner side thereof.

Fig. l2 is a transverse section through one of the bolting reels.

Y Fig. 13 is a detail view of the quick release operating mechanism tor quickly separating the rolls.

Fig. 14 is a diagrannnatic view showing the break and reduction reeis, the brush scalpers for the break reels, the bolting reels, and the flow of stock through these parts.

Although various changes maybe made in the details of construction and in the arrangement of parts without departing from the spirit or scope of my invention as defined in the appended ciaims, i have shown a representative construction in the drawings, in which the reference numeral i designates the complete unit or mill having a after explained.

The head end wall 6, thel tail end wall 7, both of which form part of .the housing 2, and the two intermediate walls 8, 9, respectively, which separate the three parts or

sections

3, 4 and 5, are preferably castings formed to the shape of the mill transversely, and in which the various rotatable parts of the mill are journaled, also by means of which other parts are supported. These walls may be termed transverse frame members and these frame members are connected at thebottom by longitudinally-disposed angle irons 10 serving as sills which provide proper bearing faces for contact with the floor or foundation on which the machineis set. Longitudinally-disposed angle irons 11 connect the upper ends of these frames together. Connecting the head end transverse member 6 with the adjacent intermediate transverse frame member 8 at points between their upper and lower ends are channel beams 12 which are secured to opposite side edges of these frame members and extend a distance forward or 1n advance of the head end frame member 6,

as clearly shown in Fig. 3.

A transverse bearing member 13 is riveted or otherwise fastened at opposite ends to the outer ends of said channel beams. Said channel beams and the transverse bearing member 1 3 therefore constitute a supplemental frame to which, midway between the ends of said transverse member, a bearing 14 is secured in which the main or driving shaft 15 of the machine is journaled. The frame work is closed at the top, bottom and sides to form a housing or enclosure for the machine.v For this purpose, a to-p wall l16 is provided which receives support from the opposite longitudinal channel irons at the upper ends of the transverse frame members and is secured thereto in any suitable man.- ner. Side walls 17 are provided which close the sides of the machine and may be secured in any suitable manner to the` side edges of bearing member 13 of the supplemental frame. A pulley 20 is also secured to said drive shaft and located inside of said transverse bearing member. From the pulley 20, one of each of the two pairs of break rolls and the two pairs of reduction rollsY are driven; also one of the rotary scalpers, as will appear hereinafter. A feed spout 21 is arranged in -the top of thev housing through which the grain is fed into the machine, and a sliding cut-off 22 is movable within said spout to regulate the flow of the grain or to entirely shut off the same. This spout or feeding device, as it may be termed, pro-jects into the roll part or section 3 of the machine between the transverse frame members 6' and 8, and delivers the grain onto a shoe or vibrating shaker 23 having a distributing device 24 at one end thereof directly over the first pair of break rolls, which the

rolls

25, 26 1constitute.. ThisV distributing device has an inclined table 27 provided with upstanding` ledges 28,V 29,

respectively, at and near itsV lower end. Above said inclined table an adjustable plate 30 is arranged between which and the table a passage 31 is provided. Beneath the lower end of the inclined table a second table 32 is provided which is inclined in an opposite direction and has upstanding ledges 33,

34, respectively,` at and near Vthe lower end of the same. I Y

The last-mentioned inclined table terminates with its lower end at or near a plane in'which the two `break rolls 25, 26 come in contact. The oppositely-inclined tables are substantially of the same length as said break rolls so that when the frame 23 is actuated the grain is distributed over the two tables from end to end and Vis delivered between the break rolls in a Vthin stream so that the break rolls are effective from end to end thereof.

The mannerV of operating the shaker' or shoe 23 and'rotating said break rolls will be described hereinafter.

Situated beneath said break YrollsV is Va scalper 35, and between said break rolls and said scalper is a hopper 36 formed by plates or

walls

37, 38, which extend from the head end frame member 6 to the adjacent Yintermediate frame member S. rl`he scalper 35 comprises a rotary brush 39 and a suitable screen 40 of substantially semi-circular formation in cross section, this screen being secured to a frame 41 pivoted to the two

transverse frame members

6 and 3, as at 42. The scalper frame 41 is preferably inclined so that the screen will tail ofi vfreely at a low point, as at 43. Extending from said scalpeiframe is a bar 44 havingra threaded opening throughk which an adjusting screw 45 is Vpassed which bears against a fixed lug 46, so that upon rotating said Vadjusting screw the screen may be adjusted toward or Cil from said brush, thereby regulating the amount ot stock, such as flour and iniddlings, to be removed from the lran and more effectively cleaningl the bran.

Beneath the semi-circular screen 40 ot the scalper, hopper l? is arranger which is closed at its lower end and has'a senticircular portion e8 at said end. ln this semi-circular portion conveyor e9 is positined.

The shafts 50, 5l of the breali i ills 25, respectively, are journaled in bearing

Inountings

52, 53 secured, respectively, in the transverse traine members 6 and S, and on the outer or liront end of shaft 59 a pulley 54: is secured. This pulley is situated in front of the head end transverse traine meinber 6. The shat't 5l has a pulley 55 secured thereto in rear ot the transverse traine niember 8. l` he pulley 54tis rotated from the pulley 2O on tne main or power shaft l5, in. a manner to appear hereinafter.

Secured to the shattv 5l in rear ot the pulley 55 is a pulley 56 around which a belt 5? is passed, which also passes are ,nd a pulley 58 secured to the inner or rear end ot the shaft 59 on which the rotatable brush 3 of the scalper is secured. The belt 57 is crossed to cause the brush to travel to the right in Fig. 5. rlhis crossing ot the belt is necessitatec, due to the tact that the break roll 26, to the shaft oie which the pulley 56 is secured, travels to the lett, and a reverse ot this movement is required in order to carry the stock delivered into the scalper screen over the lower end thereoi, from which point it is discharged into a hopper GO, which delivers the material between a second set of break rolls, which the rolls 6l, 52 constitute. rlhe shafts ot these rolls are also journaled in bearing niount ings secured, respectively, in the

transverse trame members

6 and 8.

rlhe material worked through the screen of the scalper 85 is carried by the conveyor `L9 through a conveyer tube GS extending' from the intermediate traine member 8 through a bushing? Gel. formed on a centritugal bolting reel located in the part or section 5 ot' the n'iachine between the intermediate traine memher 9 ano the tail end traine member T, the `Four beine' bolted out through the sill or wire oit said bolting reel and bei delivered into a hopper 66 from which it is delivered into a second hopper 6T havingv a senii-circular lower end 68 in which a conveyor (S9 arranged, the conveyer 39 serving' to convey the vflour to an outlet l0 which may led to i any suitable point or have connection with any suitable point tor storinf or packing the flour.

ne tail over the reel 65.. which inay he termed the first break reel. and are dcliveredinto a hopper 71., havingl a depending le .L leading to a conveyor tube dli 'Z3 in which a conveyor 2lis located.. rlhe conveyer le conveys the material to the bottorn ot an elevator 75, which may he of any suitable construction but is wholly within the mill and by means oft which the middlings are carried up into a conveyer tube 7 6 having convcyer therein. The conveyer Zet conveys tiey material to the shoe or shalier 23 which is provided at that end opposite the table 27 with an inclined table Z8 having an upstandingledge 7 9 near its lower end, and a similar ledge 39 its lower end. rllhis table is constructed similar to the table 2'? at the other end ot the shoe or shaker and serves to distribute the tailings the full length thereolf when said shoe or shaker is actuated, the material passing' over the ledge S0 at the lower end ot' said table and dropping onto a second and oppositely-inclined table having` an upstanding ledge 82 at its lower end. This table tern'iinates to feed the iniddlings between two rolls 83, Se, which constitute the i'irst pair or reduction rolls ci" the machine and the shafts of which are jonri'ialed in bearing

niountings

52, 58 secured, respectively, in the

transverse trame members

6 and 8.

ln order to regulate the flow oit the iniddlings from the conveyer tube 76, a gate 85 is provided which may be actuated to close the outlet 86 in said tube to any desired degree.

lt may here be mentioned that the brealr rolls 25, 26, Gl and 62 are corrugated in the usual manner, while the reduction rolls 83 and 811-, and such reduction rolls as may be hereinafter described, are smooth surfaced.

Bearing against the two reduction rolls 83, 84tis a scraping` device S7 which coinnrises two scrapers S8., 89 bearing, respectively against said reduction rolls at their lower most points.

rlhese scrapers

88, 89 are secured to a traine 90 pivotally attached to

levers

91, 92 mounted to swing on pivots 93, 94: exten-cling, respectively, trom the head end traine member G and the adjacent intermediate trainc member 8. T Aese levers 9i and 92 are pivotally mounted between their ends and secured to the outer end ot' each lever is one e fl ot a retractile spring` 95, fastened with its other end, as at 96, to a` lined pointl ot the machine, preferably to the adjacent transverse trame members. These retractile springs serve to hold the

Scrapers

88, 89 with poner pressure against the reduction rolls 83, 8l, removing trom the latter all adheringl particles.

The iniddlings passing between the reduction rolls 83, Sel, are partially reduced to flour, and this product. or material 'falls into a hopper 9'? havinp; a closed semi-circular lower portion ln the lower end 'of this hopper a convever 99 is arranged which extend.' rearwardly and has its shaft 100 continued through a bolting reel 191, said boltsaid reel.

ing reel having a sleeve journaled in the inter-mediate transverse frame member 9 in the same manner as the sleeve 64 of the bolting reel 65, shown in Fig. 4. A con-` veyer tube 102 extends rearwardly from the rear end of the hopper 97 and enters the journaled sleeve of said bolting reel. The material entering the hopper 97 is therefore conveyed Vby the conveyer 99 through the conveyer tube 102 and into said bolting reel 98, which may be termed the lirst reduction reel.

The bolt-ing reel 101 is covered through- Iout a portion of its length with line bolting.

silk or wire 103, and it has a cut-ofi' or boxlike structure 1041- built around its rear end. This end is covered with bolting silk or wire 105 of coarser mesh than the portion 103 of The material entering this bolting reel is therefore separated owing to the finest material or fiour passing or being worked through the fine mesh silk or wire 103, while a coarser grade of material or the middlings passes or is worked through the coarser mesh silk or wire 105.

The flour or finished productpassing through the line mesh portion of said reel enters the hopper 66 and strikes the inclined wall 106 of said hopper located directly underneath said bolting reel. The outlet of said hopper 66 is divided by' a verticallydisposed wall 107 into two passages 108, 109. AFlour, `or the finished product, from the bolting reel 65, previously described, falls onto the inclined wall 110 of said hopper, owing to said wall being positioned beneath said last-mentioned bolting reel. The flour or finished product yof said last-mentioned bolting reel is thus directed through the passage 108 and falls into the hopper, 67, as hereinbefore explained, while the flour or finished product from the first reduction reel 101 passes through the passage 109 and enters a hopper 111 having a closed semicircular lower end 112 in which a conveyerV 113 is located. This conveyer 113 carries the flour or finished material to an outlet 114, which may be led to any suitable point or have connection with any suitable point for storing or packing the flour. This flour may be stored separately from the flour or linished product passing through the outlet 70, hereinbefore referred to, or both these outlets may be led into a single storage hopper or receptacle. It will be observed therefore that the different runs of flour may be stored separately or mixed together, as may be desired.

The material or middlings passing lor being worked through the coarser mesh silk or wire 105 of the bolting reel 101 falls into the cut-olf or box-like structure 10-1,y which has a parti-circular vconfiningY wall 115 and opens at 116 into a conveyer tube 117 having a conveyer 118 located therein. The opening 116, whereby communication is established between said cut-off and said conveyer tube, is arranged at a point somewhat above the .lowest point of said parti-circular wall 115,

and for this reason the bolting reel is provided with sweep arms or bars 119 which serve to carry the material passing or worked through the coarse silk or wire ofv said bolting reel into said opening 116, Vthrough which it passes into the conveyer tube 117. This conveyer tube and the conveyer therein extends forwardly through the intermediate frame members 9 and 8, and into the front end frame member-.6.

The tailings from the reel 101 are delivered f desired extent by means of a gate 123. OnY

the shaft 124 of the conveyer 118, a cam 125 is arranged, against the Vperipheral cam face of which a roller 126, mounted on theV free end of one arm of an elbow lever 127, is adapted to act. This cam therefore causes said lever to vibrate, and the vfree end of the other arm of said lever is secured to a' vibrating shoe or shakerV 128 having an inclined table l129V directly beneath the outlet opening 122 of the conveyer tube 117.

Nea-r it outer end the table 129 is provided with an upstanding ledge 130, and a similar' ledge 131 is arranged at the outer end of saidtable. These ledges are similar to the ledges of the shoe or shaker 23, hereinbefore described, and serve to assist, during the vibration of the shoe or shaker, to distribute the material evenly over said platform. This material is delivered from said platform onto a second table 132 inclined in an opposite direction and having an upstanding ledge 133 at its outer end. The outer end of said last mentioned table is positioned directly above a second pair of reduction rolls, which the rolls 134C, 135 constitute, and the shafts of which are journaled in bearing

mountings

52, 53, secured, respectively, to the

transverse frame members

6 and 8. It will be noticed that'I referred to the bearing mountingsl of both pairs of break rolls and both pairs of reduction rolls `by like numerals of reference, for the reason that such mountings are all alike. Like the rolls 83, 811 of the first pair rof reand a scraping device 136 similar to the scraping device 87 describedin connection with the lirst pair of reduction rolls, acts against the

rolls

134, 135 at their lowest Vduction rolls, these rolls are also smooth, f

points, serving to free the rolls from any material adhering thereto.

The material passing between the rolls 134. 135 is delivered into a hopper 137 sit-uated directly beneath said rolls, said hopper having a lower semi-circular closed end 138 in which a conveyer 139 is arranged. rThe conveyer passes through a conveyer tube 140 extending rearwardly from the inner end of the hopper, and this tube enters a bearing sleeve formed on a bolting reel 141, which reel may be termed the second reduction rech7 in the same manner as the bearing sleeve 64 of the bolting reel 65, shown in Fig. 4. The material in the conveyer tube 140 is thus conveyed by the conveyer 139 into said bolting reel 141.

r1`he bolting reel 141 is situated within the hopper 111 and flour is` bolted through the silk or wire covering this reel and escapes to the bottom of said hopper where it is conveyed by the conveyer 113 to the discharge opening 114 hereinbefore referred to. r1`he unsifted material or offal, tails over the rear end of the reel and enters a hopper 142, escaping therefrom through a leg 143 which may be led to any suitable point for storing or packing the ofal.

Returning to the material passing between the second pair of break rolls 61, 62, hereinbefore referred to, this material enters a hopper 144 formed by the plates 145, 146. From this hopper the material enters a scalping device or bran-finisher 147 situated beneath the second pair of break rolls and being of the same construction as the scalping device beneath the first pair of break rolls.

The material passing through the screen 148 of said scalper or bran-finisher enters a hopper 149 into the upper portion of which said scalper or bran-:finisher extends, while that portion of the stock which is in the form of clean broad bran is brushed over the low end 150 of said screen and from said point is directed into a duct or leg 151 which has its outlet at the bottom of the machine, as at 152, and at which point the bran may be placed into sacks or suitable receptacles, or it may be carried by suitable ducts to other points, as may be desired. rlhis scalper or bran-finisher separates all iour particles and middlings from the bran and discharges the bran from the machine.

Tithin the hopper, which is provided with a semi-circular lower end 153, a conveyer 154 is arranged. This conveyer eX- tends through a conveyer tube 155 which has one end connected to said hopper and its other end entered in a bearing sleeve formed on a bolting reel 156, which may be termed the second break reel, similar to the bearing sleeve of the bolting reel shown in Fig. 4.

The bolting reel 156 is covered throughout a portion cf its length with fine mesh'silk or wire 1 through which the flour from the material entering the reel passes or is worked, and this flour falls into the hopper 67 and is conveyed by the conveyer 69 therein to the discharge opening 70. At its rear end this bolting reel is surrounded by a cutoii' or bcn-like structure 158 which has a parti-circular confining wall 159 and opens at 160 into the conveyer tube 73 having the conveyer located therein. This bolting reel 156 and cut-od are situated in the hopper 67 and they are constructed in the same manner as the bolting reel 101 and cut-off 104, hereinbefore described. The coarser material or middlings passes through the coarse silk or wire 161 of the bolting reel within the cut-off and is carried into the conveyer tube 73, it being conveyed forwardly by the conveyer 74 Within said tube to the lower end of the elevator 75, which elevates the same to the conveyer tube 76. These middlings are conveyed by the conveyer 77 within said tube to the first pair of reduction rolls, through which they are passed and enter the hopper 97 to be conveyed by the conveyer 99 therein to the first reduction reel 101, the material being reduced in passing through said reduction rolls and the. flour from the reduced material passing or being worked through the fine screen of said reel, while the coarser material is carried on within the reel and passes or is worked through the coarse silk or wire within the cut-olf 104, from which point it is conveyed by the conveyer 118 to the shoe or shaker 128, and from the latter to the second pair of reduction rolls, where it is again reduced in passing between said rolls and is delivered into the hopper 137 to be conveyed by the conveyer 139 into the second reduction reel 141. The flour or .finished product passing through the silk or wire of this lreel falls into the hopper 111 and is delivered by the conveyer therein to the outlet 114. The offal or tailings is tailed over the rear end of said reel and enters the hopper 142, from which it is directed into the leg 143, to be sacked or otherwise disposed of.

r1`he shoe or shaker 23 is hung on spring arms 162 fastened to the frame of the machine and it is vibrated by means of an arm 163 secured at one end to the frame of the shaker nd at its other end to an annulus or eccentric strap 164 surrounding an eccentric 165 fastened on a shaft, the shaft being `iournaled in suitable bearings in the frameand having a pulley 167 secured thereto at a point between the front end frame member 6 and the adjacent intermediate frame member 8. On the main or power shaft 15, in alinement with the pulley 167 on the eccentric shaft 166, is a pulley 168, around which and said pulley 167 a belt 169 passes,

l, v Y

ithus Vthe eccentric shaft is rotated directly l frame member 8 and to the front or outer end vof said shaft al pulley 174 is secured. The shaft 175 of the reduction roll 84 is also journaled in bearings secured to said frame members, and at the rear or inner end of said shaft a pulley 176 is secured. Similar bearings are provided for the

shafts

177, 178 of the two rolls constituting the second pair o-f break rolls and also for the

Y shafts

179, 180 of the two rolls constituting the second pair of reduction rolls. To the outer end of the shaft177 of the roll 61 of said second pair of break rolls, a pulley 181 is secured,-and a similar pulley 182 ris Secured to the outer end of the shaft 179 of the roll 134 of said second pair of reduction rolls.

e Provision is made for rotating the break and reduction rolls and the conveyer 49 directly from the main or power shaft 15, and this is done by passing a belt 183 over the pulley 20 of the main or power shaft 15, from which it is directed in opposite directions around

thepulleys

181, 182, thence around the

pulleys

54 and 174, and thence around the pulley 172, as clearly shown in Fig. 1 of the drawings. This belt is maintained in tightened condition by means of an idler pulley 184 journaled in swingingl arms 185 pivoted to a bracket 186, which is fastened to the front end' frame member 6. The bracket 186 has a lug 187 formed thereon through which a screw 188 is passed which bears against the arms 185 and retains the idler pulley 184, with proper pres-- sure against the stretch of the belt passing from the pulley 174 to the pulley 182.

It will be observed that the main or power shaftv 15 passes through the roll section 3 of the machine and extends through the intermediate frame member 8 serving,r as the rear wall of said roll section, and on the rear or inner end of said shaft a pulley 189 1s secured. Around this pulley and the pulley 176 on the' shaft 175 of the reduction roll 84, a belt 190 passes, said roll being therefore rotated directly from the main or power shaft 15, as clearly shown in Fig. 6. A belt 191 passes over and in contact with the belt 190 at the point said last-mentioned belt passes around the-pulley 176, and said belt 191 passes over a pulley 192 secured to pair ofV reduction rolls, all `of saidipulleys being situated directly in rear of the inter.-

mediate frame member 8. Y

ISecured to the shaft 195 of the rotatable brush forming,` part of the scalper or branvfinisher 147, is a pulley 196 and around this pulley and a pulley 197 on the shaft 17 8 of the break roll 62 a cross belt 198 passes. These pulleys and said cross belt being located in rear of the intermediate frame member 8.

As is common in elevator constructions,

the elevator 75 positioned in the space or section 4 between the intermediate frame members 8 and 9 comprises a housing 199, suitable pulleys 200, 201 at the upper and .lower ends, respectively, of said housing.

and a flexible bucket carrying element 202, which travels around said pulleys. Onerof said pulleys, preferably the upper pulley, has secured to itsshaft 203 a pulley 204, which is arranged outside of said housing, and around this pulley and a pulley 205 on shaft 51, a cross belt 206 passes.` The eievator is therefore actuated Vfrom the shaft 51 of the break roll 26.

While the conveyer 49 is rotated from the front end of the machine, the remaining; conveyers are all operated from the rear end of the same, as will be presently explained.

IThe shafts of the conveyers feeding into the bolting' reels are all continued through said reels and serve as the shafts for the beaters of said reels, the continuation of the shaft of the conveyer 49 being designated by the numeral 207; that of the convcyer 99 being designated by the numeral 208; that of the conveyer 139 being designated by the numeral 209, and that of the conveyer 154 beinnjdesignated by the numeral 210, these shafts being.' respectively, what may be termed the first, second, third and fourth reel or beater shafts.

To the rear end of the shaft 207 a pulley 211 is secured, similar pulleys 212, 213V and V214 are secured, respectively, to the rear ends of the

shafts

208, 209 and 210, and around these pulleys a belt 215 passes. The shaft 207, which is a continuation and in effect an integral part of the shaft 171 of conveyer 49, is rotated from the front end of the machine by reason of the belt 183 passing' around the pulley 172 secured to said shaft, and consequently the pulley y211` at the .rear end of said Vcontinued shaft may he considered the driving pulley tor causing si ening of the several disintegrators con- 'e r rotatie-n of the beater shafts S, .209 and structed With different size meshes, depend- The belt at the rear end ot' the machine is held in tightened condition b v idler pulleyY 216 iournaled in an arm or arms 21.7 pivotalf: secured to a bracket 213 fastened to the rear end trame members T, said bracket having a lug 219 through which an adjusting' screnv Q20 is threaded and Which hears against the arm or arms Q17.

The

ccnveyers

69, 113 and 11S are also rotated 'from the rear of the machine. The shafts 221, 222, 923 ot said conveyors having sprocket Wheels '224. 226, respectivellv, secured thereto. around said sprocket Wheels` a sprocket chain 227 is passed, said chain being also passed around a sprocket wheel 998 secured to the shaft ot the conveyer 74C, said shaft extending forwardly through. the elevator housing and having the pulley 201 of said elevator secured thereto. The conveyer 7e is therefore rotated by said pulley 201 and the sprocket wheel 228 on the shaft ot said conveyer serves to rotate the

conveyers

69, 113 and 118 through the medium ot the sprockets on said lastmentioned conifeyers and the sprocket chain 22T passing around said sprockets. In order to retain said sprocket chain in tightened condition, l provide a sprocket Yidler 229,` over which said chain passes and which is journaled on an adjustable bearing 230 fastened to the rear end 'frame member 7.

Arranged Within the receiving or inlet end ot each bolting reel is a disintegrator 231, which is secured to the head end ot the reel so as to rotate therewith. Each disintegrator comprises a hub 232 provided With an nti-friction b aring 233 and a Web or lange 234 which serves as one end Wall ot a screen cage 235the adjacent end ot the bolting reel serving as the `other end wall ot said screen cage. rl`he screen cage is of cylindrical formation in cross section, and its c vlindrical wall is formed of metallic screening 236. rlhe material to be ted into the bolting reels trom the several conveyers is first delivered b v said eonveyers into the disintegrators and from the latter into the bolting reels, the screening ot' the disintegrators being ot course ot coarser mesh than the silk screening of the reel in Which it is located. A rotatable brush 237 is arranged Within each disintegrator cage, said brush being secured to the conve'ver shat't and having its brush head formed ot steel Wire or other suitable material adapted to separate the stock delivered into the screen cage and Work the same through the metallic screening ot said cage. 1n this manner the material is thoroughly disintegrated when delivered into the bolting reel.

It may be found desirable to have the ing upon the ineness of the material delivered the-reinto.

At the rear or tail end oi each bolting reel a spider .like head 233 is provided, each head having an akially-projecting sleeve or heb l23,) into which the cooperating beater shaft is journaled. Secured to each hub or sleeve ,is a sprocket Wheel 5240, the sprocket Wheels of the four reels being in vertical atinement and having a sprocket chain 241 passingvaround the same. A sprocket idler 242 is g'ournaled on an adjustable bracket 2113 secured to the rear end trame member 7, said idler having the sprocket chain 241 passing over the same.

lt vvill be observed that the bolting reels are rotatable independently of the reel or beater shafts, or as 1 have termed them, the continuations of the conveyer shafts, and for this reason the hub or sleeve 239 of the firstbreak reel has a gear Wheel 244 tastened thereon which meshes with a pinion 245 secured to a counter-shaft 246 journaled in a bearing 2117. A gear Wheel 248 is secured to said counter-shaft 246 and meshes With a pinion 249 secured to the beater shaft. The gear Wheel 241i is prcif'ided with an extended hub 250 onto which is fastened one ot the sprocket Wheels To the hnbs or sleeves 239 ot' the remaining bolting reel the other sprocket Wheels 2-1-0 are secured.

The power imparted to the reel or beater shaft 207 which passes through the iirst break reel 65 is therefore transmitted to the gear Wheel @L1-9, secured to said shaft and from which said reel 65 is rotated in the saine direction as said shaft but at a slower speed, through the medium of the gear wheel 24S, pinion .Q4-5, and gear Wheel 24:4, which constitute reducing gearing.

Since the sprocket Wheel 241e() associated with the first break reel 65 is fastened to the extended hub ot gear Wheel 24:4, the remaining Wheels are caused to rotate in unison with said reel, due to the sprocket chain 241 passing over the sprocket Wheels 2110 on the hubs or sleeves .939 of said remaining bolting reels.

As is common in bolting reels, the shafts extending therethrough are each provided with spiders 251, to the outer end of Which blades 252 are secured which are arranged to throw the material against the bolting silk., said spider and blades forming the beaters hercinbetore referred to. One end ot each reel is rotatable Within an opening formed in a transverse Wall 253 Which Jforms a tailing section at the rear end ot the reel section It, and betwee. the bolting reel and theY Wall ot the opening, suitable packing 25o is interposed, thus preventing the mixing of stock in the reel section and tailing section.

lOG

Jee

In the rear end frame member 7 alined with the boltinfr reels are o Jeninffs 256 the C 7 l C) i diameters of which are slightly larger than the diameters of the largest part of the bolting reels7 and in these openings removable bearing members 257 are situated in Which the sleeves or hubs 239 of said reels are journaled. lVith this arrangement, the bolting reels ymay be Withdrawn from the machine Without removing the Walls of the machine or disassembling other parts of the machine. 'ln the upper end of the reel compart- ,ment a vibrating dust screen 258 is situated, this screen being spaced from the top Wall of said compartment to provide a surtion chamber 259. This screen is supported at its ends on cleats 260 and is therefore free to flex between the cleats. It is provided With an intermediate cross bar 261 to which Wearing plate 262 is secured. Against said Wearing plate a cam 263'acts to cause vibration of said screen that any flour adhering to the under side of the screen will free itself and fall into the hopper K (i6, YWhile the moisture laden air Will pass through the screen and beY draivn through a suction tube 264 opening into a boi: 265 connected tothe eye of a suction fan 265, from which it is forced through an opening 267 in the bottom of the roll section venting into the atmosphere. rlhe cam 26? is secured to the shaft 203 by means of which the elevator is driven, The shaft 268 of the conveyer 77 by moans of which materia is carried to the first pair of reduction rolls, is provided' with a sprocket Wheel 269 around which and a` sprocket Wheel 270 secured to the shaft 203 a sprocket chain 271 passes, thus driving said conveyer Z7 from the elevator head shaft 203.

A`Upon examination of Fig. 14 of the dran'- ings, the 'flow of the material through the machine Will be clearly understood, this flew being as follows The clean Wheat fed into the machine passes between the first pair of break rolls, designated by the

numerals

25 and 26, material being delivers,rl therefrom into the rotary-scalper 35. Part of the material from the scalper isV delivered by the conveyer 49 into the first break reel 55, While the coarser `material or overtails which does not pass through the sieve of the scalper is delivered into the second pair of break rolls, designated by the numerals 6l, 62.

The first break reel acts to bolt out all the -flour from the material delivered thereinto, which flour is delivered out of the machine for storage or packing in the manner hereinbefore described. The overtails or middlings from this reel are delivered to the'first pair of reduction rolls, designated by the

numerals

83, 84, through the medium ofthe parts hereinbefore described. The overtails 'from the rotary scalper 35 having been delivered to the second pair of break rolls and ground thereby, is conveyed into the rotary scalper or brand-finisher 147 situated'beneath said second pair of brake rolls, the clean bran or overtails from said scalper or bran-finisher being delivered out of the machine for packing or storage, While the finer material is Worked through the sieve of the scalper and carried to the second break reel 15G, Where all the flour is bolted out and passes out of the machine for packing or storage in the manner hereinbefore described. rlhis reel has a cut-off at its tail end through Which the middlings are scalped and conveyed, in the manner hereinbefore described, to the rst `pair of reduction rolls. rl`he middlings from the first break reel and the middlings from the second break reel 156 are therefore conveyed v in two streams to said first pair of reduction rolls. rlhe overtails or ofial of this second break reel is delivered out of the machine for sacking or otherwise. rllhe middlings from both break reels are then ground by said first pair of reduction rolls and the ground stock conveyed thereby into the first reduction reel 101, in the manner hereinbefore described, the flour being bolted out, While the middlings enterthecut-o at thek tail end of said reel and are again delivered into the second pair of reduction rolls, designated by the numerals 134, 135.V The overtails or offal of the first reductionroll are conveyed out of the machine to Lbe sacked or otherwise disposed of. The middlings conveyed to the second pair of reduction rolls are again ground by said rolls and conveyed by means hereinbefore described, to the second reduction reel 141, Where the flour Yis bolted out and delivered out of the machine for packing or storage and the overtails or finish are spouted out of the machine to be sacked or otherwise disposed of. y

It is of course understood, having reference to Fig. 14, that the flow of the grain, indicated by the arrovv lines, is through conveyers, hoppers, and anelevator, as clearly shown in the remaining figures. One of the rolls of each pair of break rolls, and one roll of each pair of reduction rolls is adjustable toward and from the other roll of the pair, and for this purpose bearing mountings are provided at each end of each pair of rolls. These mountings are exact counterparts, and like the mountings of the first pair of break rolls, those of the remain-k ing rolls are also designated by the

numerals

52, 53. The mountings are tted Within openings in the front end frame member fi and the intermediate frame member A8, each mounting having an arm 272 extending therefromv and having a journal member 273 pivotally connected thereto, as at 274. One of the shafts of eachV pair of rolls is journaled axially in the

mountings

52, 53

arranged respectively in the frame" members G and 8, and ther other in the journal inein-y ber .273, each journal 'member having a fork projection 27 5, through one arm 276j of rwhich a" rod 277 is adjustably secured. Sai'drod has one end encircling"4 an eccentric 278fastened to a shaft 279 journaled in the arni 272 of the bearing mounting.

Surrounding' the other end of said rod 277'is a spring 280 whiclirbear's with one end against the arm V276 of said fo-rkproject'ion and with its otherV end against a' nu't 281 threaded on to said. rod.r Passing through the other arm 282 of said fork projection is a set screw 283, which bears against the adjacent end of they rod 277 and is adjustable 'witl'iinsaid arm 282. A` jamb'nut 284 is threaded onto said set screw to hold the latter in any adjusted position. Secured to the shaft 27 9 is a lever' 285, to the out-er or upper end of which a rody 286 is secured having a handle 287, said rod 286 is provided with a series of notches 288 adapted to have any one of the notches of the series engage a eatchbar 289 fastened tothe frame of the machine.

In the event of any foreign substance entering the machine with thewheat or other grain andbeing delivered between any pai-r of rolls,` the pivotedV journal member 273 will swing to cause the roll journaled therein to move away from\ the roll j ournaled in the' bearing mountings 52'and 53, and` during such movement the spring 280 surrounding the rod 277 is compressed. The set screw is adapted for adjusting the rolls to the exact degree of grinding desired'. While. if it isv desired to manually swing one of the rolls away from the other, the rod 286 is disengaged from the catch bar 289 and drawn to the position shown in dotted lines in Fig. 13, which causes the throw of the eccentric-to move the rod 277 in the direction of the arrow in Fig. 1l, thereby swinging the journal members 273 on the bearing mounting 52 and 53.

The walls of the hoppers in the reel sec tion are louvered and thus provide openings or passages 290 as best shown in Fig. 7. Air is drawn into the reel section in the manner hereinbefore described and in its upward movementthrough the reel section passes through said openings 290 and through the falling flour, thereby cooling the flour and drawing off all moisture released by the grinding of the wheat or other grain.

It is to be understood that this invention is not to be limited to the use of the construction set forth, but rather that it shall include all reasonable departures or variations falling within the scope of the appended claims.

Having thus described my invention,'wliat I claim; is

1. In a flour mill, the combination of a pair of break rolls, ab'olting reel, a scalper throu-gl'i which the stock from said break rolls passe-s, means for delivering the material from said scalper to said bolting reel, a second pair of break rolls,means for delivering stock from said scalper to said. second pair of break rolls, a second scalper associated with said second pair of break rolls and receiving the stock therefrom, a

second bolting reel, means for conveying stock from said second scalper to said second bolting reel, a pair of'reductionl rolls, .means for conveying middlin gs from said first-mentioned bolting reel to said pair of reduction rolls, means betweenfsaid second bolting reel and said pair of reduction rolls for delivering stock to said last-mentioned rolls, a third bolting reel, means for conveying stock from said pair of reduction' rolls to said third bolting reel, a second pair'of reduction rolls. means for delivering miiddlings from said third bolting reel to said second pair of reduction rolls, a fourth bolting reel,--and means for delivering material from said second pair of reduction' rolls to said fourth bolting reel.

2. In a mill, the combination of two pairs of break rolls situated one pair above the other, two pairs of reduction rolls situated one pair above the other, means for delivering material passing through the upper pair of break rolls tothe lower pair of break rolls and for delivering material from the upperl pairof break rolls to the upper pair of reduction rolls, means for delivering material from said upper pair of reduction rolls to sa'id lower pair of reduction rolls, said delivering means including scalpers and bolting reels whereby the stockV passingl thrcnt'igh-V saidd'elivering meansA is separated, and means for sep'aratingthe material after havingpassed through said secondv pair of break rolfl's and chlivering'5part thereof out the mill.

3. In a mill, the combination with a roll section, of a pair of break rolls within said section, a rotary scalper beneath said break rolls into which the material from said rolls is delivered, a second pair of break rolls situated beneath said first pair of break rolls and into which material from said scalper is delivered, a second rotary scalper beneath said second pair of break rolls receiving the material from said second pair of break rolls and delivering part thereof out of the mill, a pair of reduction rolls at one side of said first-mentioned break rolls into which material from both said scalpers is delivered, and a second pair of reduction rolls situated beneath said first-mentioned pair of reduction rolls.

4. In a mill, the combination of two pairs of break rolls, two pairs of reduction rolls, a bolting reel associated with each pair of xsaid rolls, and a scalping device associated 1c ing device under the second pair of break rolls.

(j. In a mill, the combination of two pairs ofvbreak rolls, means between said pairs YV'of rolls for separating the line stock from the bran, and a scalping device beneath the second pair of break rolls arranged to separate the fine stock from the bran and deliver clean bran out of the mill.

7. In a mill, the combination of a casing having a roll section, a reel section, and an intermediate section, break and reduction rolls within said roll section, bolting reels within said reel section and adapted to receive material passed through said break rolls and said reduction rolls, a suction device in the lower end of said roll section, a dust space in the upper end of said reel section separated from the space containing said reels by a screen, and a tube connecting said screen with said suction device and extending through the intermediate section.

8. In a mill, the combination with a cas ing having a roll section, a reel section and an intervening section, break rolls and reduction rolls arranged in pairs in said roll section and having the shaft of one roll of each pair extending into said intervening section,

a rotatable scalper beneath one pair of break rolls including a sieve and a brushliaving its shaft extending into said intervening section, a driviig shaft, means for rotating the rolls having their axles extending into said intervening section from said driving shaft,

and means for rotating the brush of said scalper from the shaft of one of saidV rolls extending into said intervening section.

9. In a mill, the combination of a plurality of rolls, a plurality of bolting reels receiv said reduction rolls, a suction device outsidev of said reel section, and a dust screen in saidv reel section above said bolting reelsspaced from the top wall of said reel section, the

Space between said screen and top wall hav-- ing connection with said suction device.

11. A mill having power-driven elements, driving means for said elements, a chamber provided with a bolting reel, aspace above said bolting reel divided into two parts by a screen, means operated by the driving means of one of said power-driven elements for vibrating said screen, and a suction tube in. connection with the space above said screen.

1.2. A mill having power-driven ele-ments, driving means forsaid elements, a chamber provided with a bolting reel, a spaceabove said bolting reel divided into two parts by a screen, means operated by the driving means of one 'of said'power-driven elements for vibrating said screen, and a suction tube in connection with the space above said screen. Y

In testimony whereof I affix my signature.

CHARLES 'rj HowsoN,`