US1372511A - Scourer - Google Patents

Description

c, T. HOWSON.

Patented Mar. 22, 1921.

v 5 SHEETS-SHEET l.

. my a I (iflyowson C. T. HOWSON.

SCOURER.

APPLICATION FILED JULY a. 1916 5 SHEETS-SHEET 2.

Ema;

C. T. HOWSON.

SCOURER.

APPLI-CATIQN FILED JULY 81191.6.

Patented Mar. 22, 1921.

5 SHEETSSHEET 3.

c. T. Howsow.

SCOURER.

APPLICATION FILED JULY 8,1916- Patelited Mar. 22; 1921.

5 SHEETS-SHEEI'5.

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Wit/mam UNITED STATES PATENT oer-"ice.

CHARLES '1. KOWBON, OF OWENSZBOBO, KENTUCKY, ASS IGNOR TO THE ANGLO- AMERICAN KILL 00., OF OWENSBOBJO, A. CQBPORATIOH 0]! KEN- TUCKY.

scoum Owensboro, inthe county of Daviess and' State of Kentucky, have invented new and useful Improvements in Scourers, of which the following is a specification. The present invention relates to scouring machines, and in its present embodiment 1s described as particularly adapted for use 1n scourin cereals such as wheat and the like, althou In it is to be understood that it is not limite to this specific use, as it is adaptable to a variety of uses other than that disclosed, and it may be employed, with slight mod1fications and chan es in adjustments, as a wheat peeler, a de ranner, rice polisher, rye scourer and the like.

The invention has as its objects to provide a scourer in which the grain or other material'tobe treated is thoroughly scoured and completely freed from all foreign particles or impurities which are mixed w1th or tend to cling to the grain without abrading or otherwise injuring the stock; and to provide a machine in which all collections or accumulations of dust or other foreign matter which might collect vermin or various other forms of fungi, resulting in contamination of the stock, is prevented.

Further objects of this invention are, to

provide a simple and compact machine, which may be efiiciently operated with a minimum amount of power and which is almost noiseless in its operation.

In the drawings which accompany and form a part of the specification, I have illustrated one embodiment of my invention, and in said drawings:

Figure 1 is a side elevational view of the entire machine, one of the side doors being removed to disclose parts of the internal construction. Fig. 2 is a detail view of one end of the scouring case suction hood. Fig. 3 is a fra entary sectional view taken on line 3-3, ig. 1.

a Fig. 4= is an elevational view of one end of the device; and Fig. 5 is an elevational view of the other end of the device.

Fig. 6 is a vertical sectional view taken longitudinally through the entire device.

Fig. 7 is a sectional view taken on line Specification of Letters Patent. Patent d M 22 1921 Application filed July 8, 1916. Serial R0. 108,183. i

numerals represent like parts in the several views, 10 designates acasing which may be of any suitable construction, but in the present instance, the same is disclosed as consist-. ing of two compartments, one of which compartments contains the instrumentalities for scouring the stock and separating the .impurities therefrom, and the other compartment, designated by the numeral 11, serving as a suction casing for a suction fan 12. The two compartments'of the machine-are placed in communication with each other by means of a tube or box 13.

In the top of the compartment which houses the scouring instrumentalities and preferably adjacent one end thereof is a feedox 14 open at its bottom end and having an' opening in one of its walls, formed byterminatmg such wall short of the others, to

permit the grain to be fed from the box 14 onto areciprocating shoe 15. The shoe is'lo cated close to the bottomedge of the box 14 and to prevent grain from leaking through the space between the loweredge of the box and-the top surface'of the shoe, sheeps wool 16, or other suitable packing is secured by tacks or other means to the lower edge of the j illustration only. Attached to an ing horizontally from the flap or gate 17 is a threaded rod on which is adjustably mounted a weight 21. By this arrangement,

the gate may be'raised or lowered. to admit.

more or less grain to theshoe as desired, or the weight 21 may be adjusted u nthe'rod to which it is connected, to vary t e pressure te vertically maybe employed that shown iii the drawings being b way of extend- 7 moved. In the lower with which the gate bears against the grain within the feed-box.

The shoe 15 is suspended from the top of the casing by resilient or flexible StIIPS 22 which permit a vibratory or reclprocating movement to be imparted to the shoe by the mechanism hereinafter described. The shoe has a main or top screen 23 onto which the feed-box delivers when the shoe is vibrated. The mesh of this screen is such as to permit the grain to pass therethrough, while the coarser impurities such as sticks, straw, corn, and the like, roll or slide down the main screen to a spout 24 which delivers to the outside of the casing. The grain or seeds fall onto a seed screen 25, which screen delivers'the seeds to a hopper 26, while the finer foreign particles, such as broken grain, small seeds, sand and the like, pass through the perforations of the screen onto the solid bottom 27 of the shoe, which delivers them to a spout 28 discharging to the ou side of the machine.

The grain delivered by the seed screen 25 to the hopper 26 passes through one end of a suction pipe 29 and falls into a hopper 30 which delivers to the scouring mechanism. The suction pipe 29 leads upwardly and then curves downwardly, as shown in Fig. 8, to a short pipe 31 which delivers to a settling chamber 32. The settling chamber 32 is exactly similar in structure to the settling chamber 33 shown in Fig. 7 and comprises a closed compartment having one side inclined downwardly and outwardly toward the side of the casing. In the side of the casing 10 at the lower endof the inclined wall of the settling chamber is a door 34 by means of which the heavier particles which collect in the settling chamber may be repart of the settling chamber are a pair of plates 35 inclinedi downwardly and inwardly of the casing and one of these plates pivotally carries at its lower end an auxiliary door 36 which is normally maintained in closed position due to gravity, and by this construction, a pocket is provided in the bottom of the settling chamber, and the auxiliary door 36 prevents air from being drawn through the cracks about the outer door 34. Above the outer door is a slot or opening to admit air in to the settling chamber, and the slot has a sliide 36 for closing the opening when desire The chamber 32 is, furthermore, provided with a depending partition or web 37 which forms a compartment 38 having an open bottom, the current of air through which is controlled by a swinging plate or valve 39. The valve 39, as shown in Fig. 7, is pivoted at one end and is operated by means of a push-rod 40 extending outwardly through the side of the casin to permit ready mamp a lon thereof. he chamber 32 is in communication, by means of a transverse conduit or pipe 41 with a suction box 42' carries off the chaff, dust, shrunken kernels,

and all foreign particles of matter lighter than the grain being treated, and these impurities are carried by the pipes 29 and 31 to the settling chamber 32. The current of air entering the chamber 32 passes beneath the partition 37, the heavier particles dropping into the bottom of the settling chamber from which they may be removed through the door 34, and the lighter particles being carried into the compartment 33 through the conduit 41 into the suction box 42 from which they are drawn by means of the fan 12 through the member 13 into suction casing 11, and they are forced through the outlet of the suction chamber to suitable collecting receptacle.

he grain in the hopper 30 is carried into a cylindrical scouring case 43 which may be of any suitable type, and while I have shown it, in the present embodiment, as being of reticulated material, it may be constructed of wire cloth, perforated steel, chilled slot cast iron, fiat sheet steel, or any other material depending upon the material to be treated.

Extending centrally through the scouring case 43 is a beater shaft 44 which is mounted in suitable bearings 45 in the end walls of the casing 10. The ends of the shaft 44 extend outside of the casing and on one of said ends is removably mounted a pulley 46 by means of which the beater-shaft may be driven, any suitable source of energy being connected up to said pulley. It is, of course. obvious that the bearings 45 may be of any approved construction, but, in the present instance, I have disclosed the same as being of the ball-bearing type, so as to reduce friction to a minimum, and these bearings are carried by removable bearing-boxes 47 which are detachably secured in the end walls of the casing 10, which openings are of slightly greater diameter-than the beater section of the shaft, so as to permit removal of the beater endwise of the casing through one of said openings without in any way disassembling the machine.

The end of the beater shaft 44 extending through the suction casing 11 carries the fan 12, and that portion of the shaft which lies within the scouring case is provided with a plurality of beaters or fingers 48. Adjacent one end of the scouring case, the beater shaft has a pair of spirally arranged flights or flanges 49 whlch are disposed obliquely to any the longitudinal axis of the-beater, andthese flights are adapted "toforce. the grain from Each-of the rings is connected to t e next or less air-tight joint about the shaft Mi-and succeeding ring small lugs 51 which engage in notches or recesses in adjacent ri and by this arrangement, angular relative displacement of the rings is prevented.- The heaters or fingers 48 are corrugated radially with respect to the axis of the shaft 44, and each ofthe corrugations of the fingers are divergent so that each corrugation succes. sively presents its rubbing surface to the grain with increased pressure, it being understood that the heater-shaft is adapted to rotate in a direction to cause the narrowedge of the heaters 48 to enter the stock being treated. The corrugations of the beaters 48 have rounded or smooth corners which prevent the liability of the stock breaking and cause a general but continuous rubbing of the heaters against the stock, the stock againstthe stock, and the stock against the scouring case, and thus a gentle and nonabrasive scouring action results, which does not injure or crush the stock, but evenly removes all foreign particles capable of being removed from the wheat or grain.

' The scouring of the grain or wheat is accomplished in the interior of the case by the fingers scouring the wheat or grain against itself, the grain being scoured continuously from the inner periphery of the case to the beater-shaft in the center of the case. The scouring which is done between the ends of the heaters and the inner surface of the case is incidental to the scouring by the heater-fingers against the grain, and the stock agamst the stock. To form ,a more to reduce friction where it extends thro h the end Walls of the com artinent of the casing 10, which contains t cheater, I provide leather washers 52 upon the shaft which engage the inside surfaces of said walls. I

The scouring case 43 is surrounded by or housed in a suction hood 53, which, in the present instance, comprises a somewhat Q1011,

h gated flat casing split longitudinally. and

vertically into two parts as shown in Fig. 7. The upper portion of the suction'hood is curved'transvers'ely and concentrically to the scouring case 43, andjis set closely thereto,-while the lower end of the hood depends for some distance beneath the lower edge of the securing case, thereby providing a narrow annular passage about the top and sides of the scouring case, and an unobstructed passage in the bottom of the hood. Along the top Qf'th hQQd 53, and run ing the-1 111 stock is delivered b length thereof is a slot 54*, aiia the'suaion hood is incommunication withfthe suction chainherll, through-the connecting Pipe 55,

and thus the fan 12' draws the? air to ther suction hood. ,B

and through the same drawin out all fuzz,

heeswing, dirt, and the like,=l1berated'fromthe grain by the action of the heaters 4 8. The end wall of the-suction hood opposite the pipe 55 is providedwitha number of small openings 56 which allow air to enter the hoodv and clean the corners of all scours ings, dirt, and the like. By ventilating the 1 scribed, the necessity of an extra set of spoutin now generally used in the standard types 0 machines for drawing off the foreign particles, is obviated, and all collection or accumulation of foreign matterin the in terior of the suction-hood 53, which might tend to collect growths which would contaminate the stock being treated, is elimihood 53 and the casing 43 in the manner denated. The two parts of the hood 53 may i be secured together in any suitable manner,

but in the present embodiment, I have disclosed this means as comprising pivoted latches 56'.

At the discharging end of the scouring case is a sleeve 57 into which the beater-see tion of the shaft extends and which, dis-r charges into a discharge chute 58. The sleeve 57, as shown inFig. 3, is open at one side, which opening. is normally closed by.

a retarding valve 59. Theretardingvalve 59 comprises a plate fixed along its upper end to a pivoted shaft 60 which at one end extends outwardly beyond the side of the:

casing and upon this outwardly. extending end isfixed a horizontally extending arm 61 carrying an adjustable. weight 62; i The, retarding the scouring case, and the pressure upon the wheat may be varied b wheat-is forced by the spirally arranged lights or feeders 49 uponthebeater shaft from the hopper 30 into the-scouring case i 43, where thewheat is suhj ectedto the scour ing or rubbingaction of the web-shaped valve '69jserves as a l later for retaining the wheat or other stock beingtreated under suitable pressure within adjusting the weight 62 lengthwise of t e arm. 61. The

1-20 beatcrsor fingers 48. -The pressure with l which the valve59 retains the stock in the scouring case, while beingscoured, deter mines the degree of. scouring, a greater pressure allowing a harder rubbing action by the scouring of the grain. The 'sameamount of the flights 49 into the scouring case at al times, and the feeding of the stock i independent of the pressure heaters, and, therefore, a more thorough v v to which -the stock being scoured is subjected, and thus the capacity of the machine may be worked to its limit, although the pressure with which the stock is retained in the case by the valve 59 may be varied. The feeders 49 control the amount of stock being fed into the scouring case, and this amount valve may be pipe section 64,

'wardly extending of stock is uniform, although the retarding adjusted to retain the stock under greater or less pressure within the case.

The discharge chute 58 forms a part of a suction pipe 63 which, as shown in Fig. 4, extends upwardly into thecasing and curves downwardly, so as to deliver into the short which discharges into the settling chamber 33. The settling chamber 33 which is described above, isin all respects similar to the settling chamber 32, and is connected to the suction-box 44 by means of a transverse conduit 65. Y

'By the latter arrangement, the finer particles of dust and other impurities which may have escaped the suction action while passing through the scouring case are again subjected to a current of air which enters thedischarge chute 58, passes through the pipes 63 and 64 into the settling chamber 33,

where heavier particles drop into the bottom of the settling chamber and are withdrawn therefrom through a side-door in the casing. The lighter particles are carried through the conduit 65 into the suction box 44 and from thence are drawn, by means of the fan 12, into the suction chamber 11.

It will be noted that the grain or stock being treated is subjected to three distinct currents of air, it being subjected to one current of air before passing into the scouring case, a second current of air while .in the scouring case, and a third current of air after it passes from the scouring. case, and by so repeatedly subjecting the stock to different currents of air all foreign particles are thoroughly removed, and the stock is delivered from the machine in a thorou hly secured and clean condition. All air poc ets or closed corners, which would tend to collectmaterial in which bacteria might thrive, are eliminated, and all of the dust is delivered to one central point.

The shoe 15 is vibrated or reciprocated from a vertical eccentric shaft 66 which is mounted in suitable bearings carried by a bracket 67 extending from the end wall of the casing. The lower end of the shaft 66 carries a frictiondisk 68, the lower face of which is adapted to engage against the periphery of a friction disk 69 secured by a screw 70, or other means upon the outend of the beater shaft 4-4, but it is to be understood that the friction drive between the beater shaft 44 and the shaft 66 may be varied as desired. Upon the upper end of the shaft 66 is a fly-wheel tion disk 68 71, which absorbs vibrations due to the reciprocation of the shoe and tends to cause the shaft 66 to rotate with a uniform angular movement. The shoe 15 is connected by means of a strap or strip of suitable material 72 to the upper end of the eccentric shaft 66, and the shaft 66 may be provided with a suitable shifting lever 73 for with drawing the disk 68 from. engagement with the disk 69.

' When the beater shaft 44 is driven, the eccentric shaft 66 is rotated and the shoe 15 is vibrated, and due to the movement of the main screen 23, the wheat or grain is automatically fed from the feed box to the scouring case. The friction wheelor disk 69 may be adjusted longitudinally of the shaft 44, so that it may engage the face of the fricat different distances from its center, and this arrangement allows the eecentric shaft to be driven at different speeds.

so as to regulate the number of vibrations of the shoe and thereb the amount of stock which is automatically fed from the feed- When the shoe 15 is stano grain is fed from the feed-box and the transmission mechanism between the shafts 44 and 66 is noiseless in operation, and it may be easily adjusted to vary the speed of vibration of the shoe.

It is, of course, obvious that the number and size of the perforations in the screens of the shoe 15 and the angle of inclination or pitch of these screens may be varied as desired, dependin upon the kind of stock being handled. t is preferable, however, to vary the speed or rate of vibration of the shoe in accordance with the kind of stock being treated, and the degree or quality of the separations desired to be obtained.

he invention is susceptible of various modifications and changes which would be within the spirit of the invention, without departing from the scopeof the following claims.

Having thus described my invention, what claim as new and desire to secure by Letters Patent is 1. In a machine of the class described, the combination of a grain feeding mechanism, a scouring case to which the grain passes from said feeding mechanism, a suction pipe in the path of the grain to remove impurities therefrom before passing to the scouring case, grain scouring mechanism in said case, a suction hood surrounding said scourbox onto the shoe. tionary,

ing case and having a longitudinally-disa suction hood surroun scouringcaseto which the grain'passes from '---1sa id, feedin mechanism, a suction-pipe in]; the :patho the grain to i remove impurities therefrom before passing to the scouring case, grain scouring mechanism in said case,

sa1d scou "case and having :a'longitu ally-dispose.

. periphery of said scouringcase and longiair to direct a blast of-air against the tudi'nally, thereof, said suction "hood being providedwitha depending'bottom to receive impurities, afsuctlon pipe-connected to the connected to bottom of saidlhood, a 'grain' deli'very pipe having a gravityfdeliverydeg and an upwardly extend' suction leg to which said scouring case dc 'vers and a suction pipe the suction leg of said delivery pipe. I v

3. In a machine of the class described," the combination of ain feeding mechanism, a reticulated scouring case to which the grain passes from said feeding mechanism,'a suction pipe in the ath 'ofthe grain to remove impurities there om before passing to the I hood, a grain delivery pipe having a gravity leg and an u wardly extending suction leg to which sai scouring mechanism delivers,

45. scouringcase to which the gram passes from means for controlling the-flow of grain from said scouring case tosaid' delivery pipe, and a suction pipe connected to the suctlon leg of said grain delivery pipe. i 1 7 described, the

d; In 'amachine of the class combination of grain feeding mechanism, a

said feedingmechanism, a-suction pipe in the path of the grain-to remove impurities therefrom before passing to v the securing case, a settling chamber to which said suc-' tion pipe delivers to intercept and collect theheavier particles in the suction pipe, an outlet pipe from saidsuction chamber, a

manual valve to controlsa'id outlet pipe,

" grain scouring mechanism in scouring :case, a suctionh'ood havingjanalr-mlet to V deliver a radially-disposed blast of air lengthwise of'said scourinig'case, asuction pipe connected to said suction-hood opposite said air inlet, .a gram delivery plpe' hav inga gravity leg andanupwardly extend- Qing suction leg to which, sa1d scouring ca'se delivers, .a suction pipe connected to the suc t'io'n leg of said gram delivery pipe, a settling trol said air outlet pipe.

5.='1In a. machineof theclass chamber to said last-named suction pipe delivers toj'v intercept and collect the heav erparticles, an 'airoutlet pipe for said settling-chamber, and 'a'manual valve to concombination ofa suction casing having suct1on produclngmeans therein, gram feeding mchanism, a scouring case to which the grain passes-from said feeding mechanism,

a suctlon pipe idtheypath of the grain to remove'impurities therefrom before passing to the scouring case leading to saidsuction caslng, grain scouring mechanism in said case, a suction hood the upper part of which closel surrounds said scouring case having a ra ially-disposed air inlet deliveringfia 1 blast of air longitudinally of said scouring described, the

case, a suction"-pipe connected ,to the lowerpart of said suction hood and .leadingto said suction casing, a grain delivery pipe having a gravity leg and a suction leg to which said scouring case delivers, and a sac tion pipe connected with the suction leg'ot sa1d gram dellvery plpeleading to said suction casing.

, 6. In a machine of the class described, the combination of a suction casing having suct1on producing means therein, grain feedingmechanlsm, a scouring case to which the gram passes from said feeding mechanism,

a suction pipe in the path of the grain to re move impurities therefrom before passing Y to the scouring case leading to said suction casing, a settling chamber in said suction pipe between its intake and said suction cas ng, grain scouring mechanism in said case, a suction hood, the upper part of which closeliy surrounds said scouring case having a ra ially-disposed air inlet delivering a blast of air longitudinally of saidscouring case, a suction pipe connected to the lower part of said suction hood, and leading to sa1d suction casmg, a grain delivery pipe having a .gravity leg and a suction leg to which sa1d scouring, casedelivers, a'suction pipe connected with the suctionleg of said grain delivery pipe leading to said suction casing, and a settling chamber in said suc- U011. pipe between the suction leg and said suction casing. a v

'7; Ina machine of the class described, the combination with grain feeding mechanism,

1 of a reticulated scouring case to which said mechanism delivers, grain scouring mechan sm 1n sa1d case, a suctlon hood, theupper part of which surrounds said scouring case closely adjacent thereto to form an annular space about the same, said suction hood havin in its top a longitudinall disposed air in ct slot to direct a radial .b ast of air' against said scouring case andinto the annular space, said suction hood being provided with. a depending closed bottom to receive the impurities from said scouring case, and a suction pipe connected to the bottom of said suction hood.

8. In a machine of the class described, the combination with grain feeding mechanism, of a-reticulated scouring case to which said mechanism delivers, grain scouring mechanism in said case, a tially oblate form having an enlarged upper portion closely surrounding said scouring case and provided with a longitudinally-disposed. air inlet to deliver a radial blast of air against the periphery of said scouring case, and a depending closed bottom portion to receive the impurities and a suction pipe connected to the bottom portion of said hood.

9. In a machine of the class described, the combination with grain feeding mechanism, of a reticulated scouring case to which the grain passes from said mechanism, a grain scouring mechanism in said case, a suction hood having an enlarged upper portion closely surrounding said scouring case and provided with an air inlet lengthwise thereof to.discharge a radial blast of air against said scouring case, and a-narrowed and closed bottom portion adapted to receive impurities, a suction pipe connected with the bottom of said suction hood, a valved delivery outlet from said scouring case, and a grain delivery pipe to which said outlet pipe delivers having a depending gravity leg and an upwardly extending suction leg.

10. In a machine of the class described, the combination of a scouring and separating casing, a suction casing'independent of said scouring casing and having suction producing instrumentalities therein, grain feeding mechanismin said first-named casing, scouring mechanism to which said feeding mechanism delivers, suction means con necting said scouring casing and said suction casing and operative on the grain as it passes from the feeding mechanism to the scouring mechanism, suction means operative about and through the bottom and sides of said scouring mechanism and connecting said scouring casing andsaid suction casing, a grain delivery leg to which said scouring mechanism delivers the scoured and purified grain, and suction means operative on said delivery leg connecting with said suction casing.

11. In a machine of the class described, the combination of a scouring casing, a suction casing independent thereof and connected therewith by a plurality of suction conduits, grain feeding mechanism in said scouring casing, grain scouring mechanism in said scouring casing, suction producing means in said suction casing, operating means for grain feeding mechanism exterior of said scouring casing, a single shaft traversing said casings upon which said suction hood of substansuction producing mechanism, said scouring mechanism and said operating means for said feeding mechanism are mounted, and hearings in the outer walls of said scouring and suction casings for said shaft removably fitted to said walls and of a size to permit longitudinal withdrawal of said shaft and its scouring mechanism without disassembling them.

12. In a machine of the class described, a scouring case, a two-part suction hood about said case and comprising a casing surrounding the top and sides of the case somewhat closely and depending at its bottom beneath said scouring case, said hood having a slot extending lengthwise above said scouring case, and means for drawing a current of air through said slot and into and through said suction hood.

13. In a machine of the class described, a scouring case, a suction hood about said case and comprising a casing surrounding the top and sides of the case somewhat closely and depending at its bottom beneath said suction case, said hood having a slot extending lengthwise above said scouring case, an outlet passage leading from one end of the hood and located beneath the scouring case, and means in said'outlet passage for drawing a current of air through said slot and into and throu h said suction hood.

14. In a mac ine of the class described, a scouring case, a suction hood about said case and comprising a casing surrounding the top and sides of the case somewhat closely and depending at its bottom beneath said scouring case, said hood having a slot extending lengthwise above said scouring case and a plurality of openings in one of its ends, an outlet passage leading from the other end of said hood and located beneath said scouring case, and means in said outlet assage for drawing air through said slot and openings and into and through said suction hood.

15. A machine of the kind described comprising a housing, a scouring casing horizontally arranged and supported in the housing in a central portion of the latter and toward one end thereof, a suction chamber at the other end of the housing, a suction element in said chamber, a sieving mechanism supported in the housing and disposed directly above the scouring casing to deliver stock in one. end of the latter, said scouring casing being adapted to discharge stock at the other end thereof, two air conduits, one of each extending from the suction chamber to a point adjacent each end of the housing in order that a current of air will act upon the stock being fed and discharged from the scouring casing, and a suction hood surrounding the scouring casing and having connection with said suction chamber.

16. A machine of the kind described comprising a housing divided into two compartments by a substantially vertical partition, a scouring casing horizontally arranged and supported in one of said compartments in a central portion thereof, a suction element in the other of said compartments, a sievin mechanism supported in the housing and disposed directly above the scouring casing to deliver stock in one end thereof, settling chambers arranged in the same compartment with the scouring chamber and at one side thereof, said settling chambers having a common connection with'said suction compartment, a conduit extending from each of said settling chambers to apoint adjacent the ends of said scouring casing, respectively, in order that a current of air will act upon the stock being fed and discharged from the scouring casing, and a suction hood surrounding the scouring casing and having connection with the suction compartment.

17. In a device of the kind described comprising a housing divided into two compartments by a substantially vertical partition, a scouring casing horizontally arranged in one of said compartments in a central portion of the latter, beater mechanism arranged in the scouring casing and having the shaft thereof extending through said housing, said outer compartment of the housing constituting a suction chamber,- a suction element in said suction chamber and mounted on said shaft, a sieving mechanism disposed in the compartment with the scouring casing and directly over the latter to deliver stock to one end thereof, said scouring casing adapt ed to discharge stock at the other end thereof, settling chambers arranged within the compartment with said scouring chamber and at one side thereof, a common connection between said settling chambers and said suction chamber, a conduit extending from each of the settlingchambers, each of said conduits being extended to points adjacent one end of the scouring casing, respectively, in order that a current of air will act upon the stock'being fed and discharged from the casing, a suction hood surrounding the scouring casin and having connection with the suction c amber, and each of said settling chambers having discharge openings.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses. 1

CHARLES T. HOlVSON.

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