US1729070A

US1729070A - Apparatus for washing, separating, and grading materials

Info

Publication number: US1729070A
Application number: US91207A
Authority: US
Inventors: Howard S Gerken
Original assignee: GRAVEL PRODUCTS CORP
Current assignee: GRAVEL PRODUCTS Corp
Priority date: 1926-02-27
Filing date: 1926-02-27
Publication date: 1929-09-24
Anticipated expiration: 1946-09-24

Description

Sept, 2%,, H. :50 GERKEN 1,729,070

APPARATUS FOR WASHING, SEPARATING, AND GRADING MATERIALS Filed Feb. 27 1926 5 Sheets-Sheet l m Q L) //V VENTO/Q Sept. 24, 1929. k H. s. GERKEN 1,729,070

APPARATUS FOR WASHING, SEPARATING, AND GRADING MATERIALS Filed Feb; 27, 1926 5 Sheets-Sheet 2 Sept. 24, 1929. H. s. GERKEN APPARATUS FOR WASHING, SEPARAT ING, AND GRADING MATERIALS Filed Feb. 27, 1926 5 Sheets-Sheet 5 Y 2% 25' 'w'l WJ Sept. 24, 1929. H. s. GERKEN 1,729,070

I I APPARATUS FOR WASHING, SEPARATING, AND GRADING MATERIALS Filed Feb. 27, 1926 5 Shets-Sheet 4 A ffO/ZA/EKQ Sept. 24, E929. H. s. GERKEN 1,729,070

APPARATUS FOR WASHINQ, SEPARATING, AND GRADING MATERIALS Filed Feb. 27 1926 5 sheets sheet 5 4/ fly/r Pasta Sept. 24, 1929 UNITED s A rEs PATENT F I E:

HOWARD s. GEBCKEN, or BUFFALO, NEW YORK, AssIeNoR, BY'LDIRECT ANDMESNE ASSIGNMENTS, 'ro eRAvEL PRODUCTS CORP RATIO or UFFALO, EW YORK,

A CORPORATION or New YORK APPARATUS r02. WASHING, sEr RA'rINe, AND: GRADINGJrm'rnRI zs Application filed February 27, 1926. Serial NO. 91,207.

This invention relates to improvements in apparatus for washing and separating or grading materials, as for instance, sand and gravel from waterways. I

' 5 One object of the invention is to provide a practical and efficient apparatus for the pur-' pose stated adapted to thoroughly and expeditiously wash, separate and grade, sand and gravel orthe like at the source of supply and deliver the separated materials to suitable receptacles in a clean condition substantially free from excess water.- A

Other objects of the invention are to provide an apparatus of this sort'adapted to first 1 separate the undesirable material from that and also to provide automatic means for in termittently dumping this washed material without discharging any substantial quantity of the washing water therewith from the e0 settling boxes; and also to provide an apparatus of this sort having an upper trough for effecting the primary washing of the material and separating therefromthe coarse refuse,

a a lower trough for receiving a portion of the. 3 desired materlal, means between 831d upper and lower troughs for separating a part of the desired material and discharging the same from the apparatus, and means for receiving-the remaining desired material and delivering it to said lower, trough; also to provide the troughs with separate, spaced, separating and washing units which are constructed and adapted to, be interchangeably mounted on said troughs so that these units 5 ean'be changed fromone position: to another on either trough in accordance with the kind or condition of the material -to'be washed, 'separated and graded.

Further objectsareto construct a washing,

0 separating and grading apparatus particularly a'daptedto beused on a boat or scow, so that it can be positioned lengthwise of the boat over the hold or hatches, whereby, the washed, separatedmaterial can be discharged from the apparatus into separate compartmen-ts in the hold, or delivered to one 'Or another' part of the hold as maybe desired to segregate the difierent grades-of material or evenly load the boat; and to construct the supporting means so that said means and the apparatuscan be moved bodily to a lateral position on the boat to permit unobstructed acc'ess to the hold of the heat through the hatches; and also to construct said supporting means for said apparatus, so that the same 'may be collapsed ,or lowered to permit the passage of an unloading or other apparatus on the boat over said washing, separating and grading apparatus, and to form a compact unit having its center of gravity disposed close to the deck to'avoid swaying or dislocation of the apparatus in rough weather;

Other objects are to improve and simplify apparatus of the sort described in the other respects hereinafter specified and claimed.

In the drawings Fig. '1 is a side elevation of amaterial washing, separating and grading apparatus embodying the invention arranged lengthwise over the hatches of a boat, a portion of which is shown in section.

Fig. 2 is a similar rviewithereof in its collapsedor inoperative position at one side of the boat.

Fig. 3 is a fragmentary plan view of the boat with the apparatus in operative posi tion above the holds or hatches of the boat.

Fig. is a transverse sectionof the upper portion of the boat showing the apparatus in operative position admidship in full lines, and in its collapsed, inoperative position at one side of the boat in broken lines.

Fig. 5 is an end elevation, on an enlarged scale, of the material receiving end ofthe apparatus. 1

V. F i'g. 6 is a transverse, vertical section of the apparatus, on line 6-6, Fig. 7

Fig. ,6 is a detail trans arse section, on an enlarged scale, of the'means for adjustably of the apparatus on line 10- 10, Fig. 11.

Fig. 11 is a transverse section thereof on line 11-41, Fig. 10.

Fig. 12 is a plan view ofa baffle plate used inthe primary separating units.

Fig. 13'is alongitudinal, vertical section,

' v onfan enlarged scale, of one of the primary separating units, on line 13-13, Fig. 8.

Fig-14 is a plan view of one of the intermediate separating and grading screens or units of the apparatus, on line 14--14, Fig.

6, on an enlarged scale.

Fig. 15 is a fragmentary, sectional plan view thereof on line 1515, Fig. 6.

Fig. '16 is a fragmentary, transverse, vertical section thereof, on line 16-16, Fig. 14, showing the same detached from the apparatus. I

Fig. 17 is a longitudinal section thereof, on line 17-17, Fig.18.

, Fig. 18 is a fragmentary, transverse secf 'tion thereof, on an enlarged scale, on line 1.8--18, Fig. 14.

. The material washing, separating and grad- Ping apparatus embodying the invention is preferably installed-on a boat or scow and com rises, generally, a pump 10 arranged on the oat A, and adapted to suck sand, gravel and water from the bed of a river or other body of'water, through any usual nozzle and hose 12 and deliver these materials through a standpipe or assage 13 to the ugper end '45 of an inclined c ute or flume 14. T 1s -flume extends lengthwise of the boat over the hatchways B of the hold C'which preferably is divided into compartments for receiving the separated and graded materials. The chute 14 is rigidly mounted on a series of transverse, vertical and movable-supports or frames 11, 11 and 11 which will be described later.

Coarse separating or screening units 15 are which it is conducted overboar beneath the chute 14 arranged in spaced relation along the bottom ofthe chute 14 through which screens. pass all of the gravel and sand which are to be vre,- tained,together with a art of the water,while therocks and other un esirable, coarse refuse 5 material pass overthe screens with a portlon of the water and are dischar ed from the lower, end of 'the'chute into a opper or box 16,and thence-to apassage or pipe through Arranged lengthwise and also rigidly supported on the frame 11,

11 and 11 is a trough 20,'preferably of substantially the same size as the chute 14, and

21 represents inclined screens or separating units which may be arranged inpairs, with each pairof screens exten ing laterally and downwardly in opposite directions from the chute 14 immediately below one of the screening units 15. Theseilateral screens 21, are adapted to receive material and water from said screens 15 and permit the gravel or coarse portions of the material to ta l off over their lower ends and fall into the desired compartments in the hold C, while the water and sand or other fine material passing through these screens may be received upon inwardly inclined and transversely. arranged trays or plates 23 which direct the sand and water mto the lower trough 20. The trough 20 is provided with'spaced washing and settling boxes or units 24 dependin from the bottom of the-tron h and into which the sand collects and is was ed and from which it is intermittently discharged into receiving compartments in the hold, as will be explained later.

The upper screening units 15 can be of any suitable construction adapted for the purpose, those shown comprising grates or screens 15 formed of bars 25 extending lengthwise of the chute 14 and spaced apart according to the size of material to be accepted, and rigidly connected by end cross bars 26. Each screen ported in a rectangular frame 27 having opposite end bars 28 and side bars 29. V The side ars 29 are detachably secured .to the undersides of the channels or members'30 forming theside walls of the chute 14, as by bolts or fastening devices 31. The ends of screen bars 25 are preferably seated or positioned in slots 32 formed by cutting awayv portions of the end bars 28, see Figs. Band 13, so as to provide 15, see Figs. 8, 9 and 13, is removably sup- I portions which overhang said ends and prevent the accidental detachment of the screens.

The discharge-of the material through the screen 15 is preferably controlled b a pair 'of slide valves or gates 34 of suita le-con- .structionmovable-laterally in guides on bottom flanges 35 at the opposite ends of the frame 27, Figs. 9 and 13, 'so that b appropriate adjustment of these gates, t e 'material can be discharged uniformly amidships, or towards one or another part of the hold to 'evenlyload the boat, or by closing the valves in some of the units 15, the material will pass over these units and discharge into are employed, as will beexfilained. Due. to the relatively hig .velocity ofthe water andimaterial passing along the chute 14 over the screen units 15 constructed as thus far described, the material and water directed through said screens has a tendency to discharge obliquely'forward and downward,.and

to spread laterally. It is desirable, however,

other compartments. These gates are particularly useful when the lateral screens 21 in the present se arating apparatus, to be able to restrict espread of the material so that it will not fall beyond the sides of the gates 34 in such manner as not to interfere with the operation of said gates. Each bafile plate has a central aperture 38, the area of which is substantially less than the screen opening, whereby ledges or baflles 39 are, provided at all four sides of the screen upon which some of the material and 'water impinges and which, in flowing inwardly over the ledges 39 toward the aperture 38, causes a counter current which intercepts and inixes with the material going directly through the aperture and turns it from its oblique and laterally'spreading course and reduces its velocity, so that all of the material and water passing through each unitfalls substantially straight down into the trough 20. This feature is particularly adapted for use when the lateral screens 21 and inclined plates'23 are omitted, and material is discharged directly to the washing and settling units 24.

- Each of thelateral separating screens 21 said side bars and engaging over the ad includes a removable grate or screen formed of spaced rods 40 which extend laterally relatively to the chute 14 and are rigidly connected together by cross bars '41. 1

Each screen, see Figs. 14 to 1.8, is remov- 4 ably supported in a rectangular frame 42 in any suitable manner, as by, engaging the ends ofthe rods 40 in notches or seats 43 in an end bar 44 ofthe frame, and the ends of the cross bars 41 in notches in the upper ed esof the frame side bars'45, and securing t e in this position by hook bolts 46 secured to jacentsc'reen rods .40.. T e, screen frames 42 are 'pivotally connected to each other and supported at' their upper or inner ends by means of a hinge rod 48, arran 'e'd len' hwise substantially'centrally beneat the c ute 14 andbearing in de f'ndin transverse plates 49, which are pre erably Ited or otherwise (letachably connected to the transverse frame liars 27 of the units 15, see Fig. 13.

As .shown clearly in. Figs. 6 and 18, the top, surfaces of the screens 21' lie substantially flush with'the upper edges of thelower end bars 44'ofthe frames 42, and the screen rods 40, are so spaced that,.as' the mixed material and water-is dischar' ed from 1 the screening units15it' flows ownwardly on the screen 21, andthe sand and water will pass between the rods40 and fell upon the to the adjacent end bar 44 and having inclined plates 23, while the gravel will travel down the screen 21-and tail oil over the lower ends thereof and fall through the. open hatches into the hold of the boat.

The upper or outer. ends of the inclined trays or plates 23 arev disposed beneath and adjacent the end bars 44 of the screens 21, while their inner ends rest on the top edges-of the side Walls 52 of the trough 20. .In order to direct and confine all sand and water to said'plates and prevent spilling-thereof over screen and deflect it in ,theopposite direction downwardly along the late 23.

Means are provlded or permitting the inclined screens 2 1,to be adjusted to different inclinations, so as'to retard or accelerate the velocity of the material passing over the screens and-thus further control the separation of the material. That is, if the velocity is retarded, relatively more of thematerial will pass through the screens, while if the velocity is increased, less material will pass through. Thus, by adjusting the screens in accordance with the proportions of the mixture, the correct or desired separation can be accurately maintained.

FOI'thlS pur each tion to being pivoted to the hinge rod 48, is also pivotall attached at its outer end to its companion p ate 23, as by a pivot rod 56 passing through the-ends of the-side bars 45 of the screen andthrough lugs 57at the outer corners of the plate 23, see Figs. 15 and 18. For holding the screens in'their adjusted posiscreen v21, in addi-' cent'its lower end with a'depending bar 58 having spaced notches 59 any one of which 'is" engageable over a fixed upstanding projec .tion 60 on the adjacent wall of the trough 20, 7

see

Fi

6 and 6". Any othersuitable means for a justably holding the screens 21 and plates '23 may be used. Guard plates '61, see I Fig. 18,. are preferably secured to the side bars 45 adjacent the outer endsof the screens- 21 to prevent the material from passing later flector 54.

sand or fine material will now be described. Each-box, see'Figs. 6, 7 and 11', comprises a.

7 ally oil? the plate .23 as it strikes the de- The washing-and settling boxes for the 1 2* hopper 62,0pei1 at to and bottom" and having a sloping rear wa l 63, an upright front wall 64, and side walls 65 which are preferably inclined inwa-rdl towards the bottom as I shown. The hop r as'side and end

flanges

66, 67 respective y at itsv to by which it-is.

secured to the bottom of t e trough 20 beneath adischarge opening 68- in the trough 20 as by bolts 69. If desired, the opening 68 may provided with a screen or grate 70.

Discharge of the material from the settling boxes is controlled by valves at the bottoms of the boxes. Each valve preferably consists of a panor shallow receptacle 72 extending across the lower open end 71 of the hopper and secured to the lower ends of upright straps 73. The valve is adapted to have a limited movement downwardly away from the open end 71 of the hopper, as by connecting the upper ends of the straps 73 to the ends of a pair of levers 75, see Figs. 11 and 15, which are secured to a rock shaft 76 on the top of-tl1e trough 20 and to which is secured an arm provided with an adjustable counterweight 77. This weight normally holds the valve in a substantially closed position with material therein surrounding the open end 71 of the hopper, and the valve being adapted to open in a manner to be explained later. i

An important feature of the construction described is that the upper screening units 15, lateral inclined screens 21 and associated inclined plates 23, and the washing and settling boxes 24 are all constructed so as to be interchangeabl attached to the chute 14 or trough 20 so tiat any of these units can be positioned either on said chute or on said trough as desired, depending on the character of the material to be separated. For this purpose the spaces in the bottoms of said chute and trough, between the different units mounted thereon, are closed b removable bottom plates or members 79, t e len th of which is substantially the same as the length of the supporting frames 27 for the units 15 or the frames 64 of the settling box units 24. The holes in the chute 15 and trough 20 for the securing bolts for said units and for the bottom plates 79 in the chute 14 and trough 20 are all on like centers, and the various units and plates can therefore be shifted and'se cured in diflerent relative positions as de-- sired.

In the use of the'washing, separating and grading apparatus, as thus far described, and assuming that material comprising sand, gravel and water is to be treated, the mixture from the nozzle 12 is delivered under pressure by the pump 10 to the upper end of the chute 14, While Water alone and under pressure is preferably discharged into the trough 20, through a pipe 13 from another pump '10", Fig. 3.

In the particular arrangement shown in Figs. 1 and 3, there are no lateral screens associated with the screening units v15 at the left or upper end of the chute 14, and the sliding gates 34: for these units will, therefore, be closed to allow all of the material to pass over these units to the units atthe lower or right hand end of the chute 14 and the settling boxes beneath the closed units 15 will be inactive.

The material is thoroughly agitated in its passage down the chute 14, and the gravel which is small enough will pass with the sand and some of the water through the screening units 15, while the large stones and debris will be carried with the bulk of the water over these units and be directed overboard through the box 16 and passage 17. The gravel, sand and water accepted by the screening units 15 will be discharged upon the lateral separating screens 21, the gravel traveling over the top surfaces thereof and tailing off over their lower ends, while the sand and the water will pass through these screens and be directed by the inclined plates 23 into the trough 20, and the sand will then ravitate over the inclined walls 63 of the was ing and settling boxes 24 and upon the valves or pans,

In apparatus heretofore used, the sand and water were discharged directly. into the hold or compartments of the boat, the water bein gradually displaced by sand settling in the old until the water finally overfiowed the hatch coamings andv thence went overboard. This method, however, permitted mud and other sediment to remain with the sand and prevented the sand from being retained in a clean condition.

The provision of the washing and settllng boxes of the resent invention, however, enables the sand to be thoroughly washed and the mud and sediment removed before it is discharged from the trough 20,, and also permits the sand to be delivered to the hold with a minimum of water. This is accomplished as follows.

As the sand and more or less muddy water is deposited in the trough 20 from the plates 23, it is met by the current of water discharged from the pi e 13 which, flowing into the boxes causes a t orough agitation of the material, and the sand gradually settles upon the valves 72, while the mud is held in sus-' pension and is carried away down the trough with the water. The valves 7 2 are so counterbalanced by the weights 74 that the receptacles 72 and also a considerable portion; of the hoppers are filled with sand before the weight of sand and water is suificient to. overcome the counterweights and permit the valves to. descend. As the valves descend, some of the sand spills out over the edges of the valves, and owing to the consequent reduction in the weight 0 weights will return the valves to substantially closed position, as in Fig. 11, before allof the sand has been dumped. Therefore, there is always a la er of sand in the valve or rece sand in the boxes, the counter-- tacle 72 su cient to seal the lower end of t e settlin box hopper and prevent the water above t e sand from flowing out of the bottom The action of the valves is entirely automatic, and they need no attention other than to adjust the weights in accordance with the workarranged as shown at the left hand side of Figs. 1 and 3, so thatthe sand would pass directly through the screens 15 into the settling boxes- For this work, the baffle plates 37 are particularly advantageous for preventingthe spilling of the material. The

sand upon reaching the.trou gh 24, would be subjected to the washing action of the stream of water therein, and be thoroughly cleaned before being discharged into the hold.

The various units of the apparatus can be arranged in still other ways for particular purposes, and the lateral screens 21, by reason of the detachable, transverse supporting plates' 49, are readily removable so as to be positioned on any of the units 15.

The transverse supporting frames 11, 11 and 11 before mentioned, are preferably of A shape as shown, each having upright spaced legs 80 connected by upper and intermediate

horizontal cross members

81, 82, upon which the chute 14 and trough 20 respectively are disposed at successively lower elevations to provide the required inclination for said chute and trough.

It is desirable that the washing, grading and separating apparatus be capable of transverse movement relatively to the length ofthe boat in order that it may be positioned over different portions of the hatchways as necessary. Also, ...when desired, the apparatus should be movable to a position over the deck at one side of said hatches, so as to leave the hatches entirely unobstructed to permit the use of unloading apparatus for removing the cargo.

For this purpose, the lower ends of the frame legs 80 are connected to trucks or supports 83 having wheels or rollers 84 adapted to travel on guide tracks or rails 85 mounted on the transverse hatch coamings or other parts of the boat. Removable extension rails or tracks 86, Figs. 3 and 4, are arranged transversely of the deck atone side of the boat, and are disposed in line with the track rails 85, whereby the entire apparatus can be moved laterally by first disconnecting the pipes or passages 13, 13*,and the connections for the discharge passage 17.

Preferably the legs 80 ofone or more of the supporting frames are of knockdown construction, as by forming each leg of two parts connected by a detachable gusset or plate 88, see Fig. 5, so that, by disconnecting the gussets and the lower'portions of the legs, as shown in dotted lines in said figure, the chute 14 and trough 20 with their attached separating units, maybe lowered substantially to the horizontal position shown in Fig. 2, and in dotted lines at the right o'f Fig. 4. By this arrangement, the apparatu can be reduced in height whennot inguse,

and when positioned at the side'of the'boat, unloading apparatus indicated :by dotted lines in Fig. 4, can be moved along-:theboat over the washing, grading and separating apparatus. Alsothe apparatus, tliuS.;QQ1- lapsed, lies close to .the deck, :where it ca n. be securely lashed in place to prevent swaying or dislocation thereof during roughfweather.

It will also be noted by' reference to Fig; 5

4, thatthe washing, separating-and grading apparatus is of relatively narrow dimensions laterally, and is of'such compact form that unloading or other apparatus can pass freely over the same while in its amidships position without collapsing or otherwise disturbing the washing, separating and grading apparatus.

I claim as my invention r s 1. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute into which the material is introduced, a screen in the bot tom thereof through which-material passes,

a substantially unobstructed trough! disposed;

below said chute and inclined insubstantially the same directionya' mater-ialwashing and settling unit in the bottom of said trough into which material is deliveredfrom said screen, means for introducing a' streainofwater into said unit to wash the material and remove refuse therefro1n,and means for automatically and intermittently discharging washedmaterial from said settling unit.

2. In an apparatus of the character described, the combination of an inclined chute into the upper portion of which solidmaterial to be separated and water are delivered and along which they are adapted to flow at a relatively high velocity, a series 'of screens in the bottom thereof over which the material passes in succession'and through each' of which some of the water and a portion of the material of all grades to here tained may pass and over which therefuse material is moved down the chute by the water, an inclined secondary screen arranged to receive the material passing through each of said first screens and through which water and fine material pass to separate the coarsematerial from the fine material, a

trough arranged beneath and inclined insubsta'ntially the same directlon as sald' g c-hute trough while the washedmaterial. is permitted to settle in said unit.

3. In an apparatus of the character described, the combination of a substantially member upon which the fine material and Water fall, a trough into which said inclined 'member delivers said fine material and water, a washing and settling unit associated with said trough into which said fine material and water are directed and from which the refuse is washed out and carried away therefrom by the water while the washed material is permitted to settle in said unit.

4. In an apparatus of the character described, the combination of an inclined chute into which solid material and water are introduced, a succession of spaced screens in the bottom of said chute through which the material to be retained and a portion of the water pass while the refuse material is moved over said screens by the water, an inclined screen arranged to I receive the material passing through each of said first screens and which is constructed to separate the coarse material from the fine material and water, a trough into which said fine material and water passing through said inclined screens are delivered, a washing and settling unit associated with said trough into which the fine material and water are directed, means for delivering an additional volume of water to said trough for agitating and washing the material in said unit and removing the refuse therefrom while said washed material is permitted to settle in said unit.

5. In an apparatus of the character described, the combination of an inclined chute into which solid material and water are introduced and along which'they are caused to flow at a relatively high velocity, a screen in the bottom thereof through which the material to be retained and some of the water pass and over which the refuse material is moved along down the chute by a relatively large portion of the water, an inclined screen which is arranged to receive said material and water from said first screen, and constructed so that the-coarse material passes over the same and is discharged from the end thereof by the velocity of the material, while the fine material and water pass through said screen, an inclined member upon which the fine material falls, a trough extending lengthwise beneath said chute and inclinedin substantially the same direction and into which said inclinedmember directs said fine material,anda

first screen under momentum and which is constructed to separate the coarse material from the fine material, a second chute extending lengthwise below said first chute and inclined in substantially the same direction, an inclined member adapted to receive fine material and water passing through said inclined screen and direct them into said second chute, a pivotal support for said inclined screen, a

pivotal connection between said inclined screen and, said inclined member, and means adapting adjustment of said parts about said pivots to vary the inclination of said inclined screen to change the velocity of the material passing thereover and thereby control the separation of said material.

7. In an apparatus of the character described, the combination of an inclined chute having a screened opening in the bottom thereof over which the material is passed in a current of water at a relatively high velocity and which is constructed to permit the desired material to pass therethrough with water, and aflat baffle plate which is arranged beneath substantially parallel with and close to said screen and has an extended aperture therein of substantially less area than said opening so as to provide ledges extending into said opening adapted to intercept a portion of the material and water passing through said opening for directing the material and water substantially perpendicularly downward from said opening in said chute and minimize lateral spreading of said material and water.

8. In an apparatus of the character described, the combination of an inclined chute to the upper part of which the water and solid material are delivered and along which they flow at a relatively high velocity, a plurality of separating screens in the bottom of the chute over which the refuse material is moved in succession by the water and-through which the material to be retained passes, an inclined trough disposed below said chute, a plurality of inclined separating screens extending laterally from beneath said chute and each arranged to, receive the material passing through one of the first screens, means for conducting material passing through said lateral screens tosaid trough, anda plurality of washing and settling units in the bottom of said trough, said first mentioned screens and said washing 'andsettling units being removably mounted and adapted to be interchanged one with the other on said chute and trough,

and said lateral screens being detachably and interchangeably mounted. a v

9. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute throughout the length of which water and solid materialare adapted to flow at a r'elatively high velocity, a plurality of s aced apart separating screens in the bottom t 1ereof,@an inclined trough disposed below said chute, inclined s screens mounted on and extending aterally from the. under side of. said chute, means connected to said lateral screens for co ducting material from said lateral screens to said trough, and a plurality of washing and settling units in the bottom of said trough, said first mentioned screens and said washing and settling units-being removably mount d and adapted to be interchanged one with the other on said chute and trou h, and said lateral screens being detachabfiy and interchengeably mounted on said other screens.- t I J v 10. In an apparatus of the character described, the combination of an inclinedclyite,

a plurality of separating screens in the ottom thereof, aninclined trough disposed low said chute,,a plurality of washing nd separating units in the bottom of said trough,

ing separating instrumentalities mounted thereon, and a plurality of spaced, transverse supportingmembers on which said troughs are secured soas to incline lengthwise,'a supy porting member to which the lower ends of both troughs ,are secured, and other support,- ing members arrangedoin spaced relation to said first support and to whichsaid troughs are also secured, said other supporting memhere being collapsible so, as to permit said troughs to be lowered while being supported- [at said lower end on said end support to'a substantially horizontal position at the elevation of their lower ends; 1

' 12. In an apparatus of the character 'described, thecombination of a pair of troughs arranged one below the other and each having separating instrumentalities mounted thereon, and a plurality of spaced, transverse supportlng members on which said troughs are secured so as to incline lengthwise, a support-- ing member to which the lower ends of both troughs are secured, other supporting memarating,

bers arranged in spaced relation' to said first support and to which said troughs are also secured, said other supporting members being collapsible so as to permit said troughs to be lowered while being supported at said lower end on' said end support to a substantially horizontal position at the elevation of their lower ends, and transverse roller trucks for said supports adapted to permitsaid-apparatus to I raised orv lowered position of said troughs.

13; In an apparatus of the character described, the combination with a boat, of a e moved transversely in either the pair of troughs arranged one below the other.

and'adapted to extend lengthwise over the hatches of the boat, separating instrumentalities on said troughs adapted to wash, separate and grade material and discharge the same through said hatches, spaced supporting members fwhich extend transversely of said troughs and to which said, troughsfiare se cured so as to incline lengthwise, and transverse roller trucks for said supports whereby said apparatus can be moved laterally to a position on the boat at one side of said hatches to leave the hatches unobstructed.

14. In an apparatus of the character described, the combination with a boat, of a pair of troughs arranged one below the other and adapted to extend lengthwise over the hatches of the boat, separating instrumentalities on 1 said troughs adapted to wash, separate and grade material and discharge the same through said hatches, spaced supporting members which extend transversely of said troughs and to which said troughs are secured so as to incline lengthwise, one or more of said supporting members being collapsible to permit said troughs to belowered to a substantially horizontal position without disconnecting said troughs or said separating 1nstrumental1t1es,and transverse roller trucks 1 forsaid supporting members ada'ptedto permit 'saidapparatus to be moved laterally in either the raised or lowered position of said llO troughs to a position at one side of said hatchestoleave said hatches unobstructed.

15. The combination with a boat, of apparatus arranged over the hold thereof and comprising an inclinedchute extendin -lengthwise'of the boat, means for introducing solid material and water into the upper portionof said chute, screens in the bottom thereof at diiierent' points along the chute through which screens material to be retainedpasses and over which refuse material and a portion of the water pass down the chute, an inclined secondary screen arranged to receive the ma: terial from each of said first screens and through which the fine material passes to separate it from the coarse material which 4 discharges over the screen into the boat, a trough extending lengthwise of the boat below said chute and into which said fine material-and water passing through said in;

clined screens are received, and washing and settling units along the bottom of said trou h into which the fine material and water are irected and from which the refuse is washed out and carried away therefrom along said trough while the Washed material is permitted to settle in said units, said unit being adapted to discharge said washed material into said hold.

16. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means for delivering water and solid material to the upper portion of the chute and causing them to flow down the chute at a relatively high velocity, a succession of primary screens along the bottom of the chute and over which the material passes in succession and through which some of the water and material pass while the refuse material is moved along down the chute over said screens by the water, secondary screening means arranged to separately receive the water and material passing through each of the primary screens and deliver the coarse material tailing off of the secondary screening means to a desired point, means arranged to receive the water and finer material passing through said secondar screening means and direct the same to a di ferent point, and means for selectively regulating as desired the quantity of material passing through the different primary screens.

17. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means for delivering water and solid material to the upper portion of the chute and causinglthem to flow down the chute at a relatively igh velocity, a succession of screens along the bottom of the chute over which the material passes in succession and through which some of the passing through said secondary water and material pass while the refuse material is moved along down the chute over said screens by the water, an inclined second chute arranged lengthwise below said first chute, secondary screening means arranged to separately receive the water and material passing through each of said chute screens and direct the coarse material tailing oil the secondary screening means awayfrom said second chute, the water and finer material screening means being received and conducted by sai second chute away from the tailings from said secondary screening means, and controlling means for selectively regulatingthe quantity of material passing through the different chute screens as desired.

18. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means for de- .down--'.ft he chute at a relatively livering water and solid material to the up er portion of the chute and causinglthfim tlo rtiw 1g ve 001 y,

a succession ofrimary coarse screens along the bottom of t e chute and over which the material passes in succession and through each of which some of the water. and a portion of the material of all grades to be retained may pass while the refuse material is moved along down the chute over said screens by the water, an inclined second chute arranged lengthwisebelow and substantially parallel to said first chute, and a plurality of secondary finer screens each arranged to receive the water and solid material passing through one of the primary screens and deliver the coarse material tailing off of the secondary screens away from said second chute, the water and material passing through said secondary screens being received by said second chute and kept away from the tailings from said secondary screens,

19. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means for delivering watenand solid material to the up er portion of the chute and causin them to ow down the chute at a relatively high velocity, a succession of rimary coarse screens along the bottom of tlie chute and over which the material passes in succession and through each of which some of the'water and a portion of the material of all grades to be retained may pass while the refuse material is.

moved along down the chute over said screens by the water, an inclined second chute arranged lengthwise below said first chute, and a (plurality of secondary screens each arrange to receive the water and solid material passing through one of the rimary screens and deliver the coarse material tailing off of the secondary screens away from said second chute, means for directing the water and material tpassing through-sand secondary screens to sai away from the tailings from said secondary screens, and means for selectively regulating as desired the uantity of material passing through the di erent primary screens.

' 20. Inan apparatus of the character described, the combination of a substantially" down the chute over said screens by the water, a plurality ofinclined secondary screens each disposed to receive the water and material passin through one of the primary screens and de iver the tailings from said secondary screens laterall away from said second chute, means arrange to direct the water and material passing through said secondary screens lplrimary coarse screens along e chute and over which the second chute for carrying the same away from the tailingstherefrom, and means for selectively regulating as .desired the quantity of' material passing through-the difierent primary screens.

21. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means for del1verin water and solid material to the up er portion of the chute and causing them to ow down the chute at a relatively high velocity, a succession of screens along the bottom of the chute over which the material passes in succession and through which some of the water and material pass while the refuse material isfmoved along down the chute over said screens by the water, oppositel alrrangedlateral secondary'screens, eac disposed to receive the water and material passing through one of the chute screens, and to direct the tailings from said secondary screens to opposite sides of said chute to diflerent desired points, means arranged to direct the water and material passing through said secondary screens away from the taih'ngs therefrom, and means for se'-, lectively regulating as desired the quantity of material 22. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means arranged to deliver li uid and solid material under pressure to t e upper portion of the chute and cause them to flow downthe chute at a relatively high velocity, a succession of spaced primary screens along the bottom of the chute and separated by imperforate chute bottom portions and over which said material passes in successionand through each of which some of the liquid and a portion of the solid material of all grades to be retained may pass, while the refuse material is moved along down the chute by the liquid to discharge beyond the screens, secondary screening means arranged to separately receive'the liquid and solidmaterial passing through each of the primary screens and direct the solid material tailing off of the, secondary screening means to a desired point,

and means arranged to direct the liquid and fine material passing through said secondary screening means away from the solid material tailing oil? of the secondary screening'means.

23. The combination with a boat, of a substantially unobstructed inclined chute extendin lengthwise of the boat over the hold thereo means arranged to deliver water, sand and gravel under pressure to the up er Qpgrtion of the chute and cause them to 0W 1 wn the chute at a relatively high velocity, a succession of primary coarse screens along the bottom of the chute over which said material passes in succession and through each of which some of the water and a portion of the sand and gravel of all grades to be repassing through the difi'erent' chute screens.

tained may pass, while the refuse material is moved along down the chute by the water to discharge beyond the screens, a plurality of secondary screens each arranged to receive the water, sand and gravel passin through one of. the primary screens and irect t e gravel into the hold of the boat, said secondary screens being adapted to direct the gravel to different desired pointslengthwise ofthe boat and means arranged to keep separated from the gravel and'to discharge overboard the water passing through the chute screens I and said secondary screens.

24. The combination with a, boat, of a substantially unobstructed inclined chute extendin lengthwise of the boat over the hold thereo means arranged to deliver water, sand and gravel under pressure to the up er portion of the chute and cause' them to ow down the chute at a relatively high velocity, a succession of primary screens along the bottom of the .chute over which said material passes in succession and through which some of the water, sand and gravel pass, while the refuse 'material is moved along down the chute by the water to discharge beyond the screens, secondary screening means arranged to receive the water, sand and gravel passlng I through each of the primary screens and direct the gravel into the hold of the boat, means arranged to keepseparated from the gravel and to discharge overboard the water passing through the primary screens and said secondar screening means, and means for indepen ently controlling the discharge of the material through the several primary screens whereby the delivery of gravel from the secondary screening means to different parts of the boat can be re ulated as may be necessary to evenly load the boat. a

25. The combination with a boat,'of asubstantiall tendin engthwise of the boat over the hold unobstructed inclined chute, ex-' thereo means arranged to deliver water,

sand and gravel under pressure to the upper portion of the chute and cause them to flow' down the chute at a relatively'high velocity, I asuccession of primary screens along the bottom of the chute over which said material passes in succession and through which some of the water, sand and gravel pass, while the;

refuse material is moved along down the chute by the water to discharge beyond the screens, a plurality of secondary screens each arranged to receive the water, sand and gravel passing through one I of the primary" screens and direct the gravel into the hold of the boat, means'arranged to dischar e. overboard the water passing through t e,

primary screens and said secondary screens, and independently adjustable trolling the discharge throug th'e'several primary screens whereby the delivery of gravel to different. parts of the boat caga be regulated as desired.

tes for' con- 26. The combination with a boat, of a substantiall unobstructed inclined chute extendin engthwise of the boat over the hold thereo means arranged to deliver water, sand and gravel under pressure to the upper portion of the chute and cause them to flow down the chute at a relatively high velocity, a succession of primary screens along the bottom of the chute over which said material passes in succession and through which some of the water, sand and gravel pass, while the mary screens tosaid secondary screens,

refuse material is moved along down the chute by the water to discharge beyond the screens, a plurality of secondary screens arranged along the chute to-receive the water, sand and gravel passing through said primary screens and separate the gravel therefrom and discharge the gravel into the hold of the boat to the side of the chute, and independently adjustable gates for controlling the delivery of material through the several priwhereby the delivery of gravel to different parts of the boat lengthwise and crosswise thereof can be regulated as desired.

27. The combination with a boat, of a substantially unobstructed inclined chute extendin lengthwise of the boat over the hold thereof, means for delivering solid material with a relatively large proportion of water to the upper portion of the chute and causing them to flow-down the chute at a relatively high velocity, a longitudinal series of spaced ing to separate the coarse material from the water and finer material and direct the separated difi'erent materials to different locations on the boat.

28. In an apparatus for separating solid materials from water, the combination of a stationary inclined chute the length of which is many times its width, means for delivering solid materials with a relatively large volume of water to""the upper portion of the chute and causing them to flow down the chute at a relatively high velocity, said chute being constructed to provide bottom openings through which the water and solid material are adapted to discharge from the chute at a plurality of points along the length of the chute, said openings being of such dimensions and character-and said chute being so constructed that a portion of the water and material of all grades to be retained may discharge from the chute through each of said openings while a relatively large volume of the water will flow at a high velocity down the chute over said openings and move refuse material over the openings for discharge beyond the openings, a second chute arranged to receive the water and material discharging through said first chute openings and along which the water is adapted to flow for discharge at a desired point, and secondary screening means arranged to receive the water and material discharging from each of said chute openings and direct the. coarser material away from said second chute while said second chute being disposed relatively to said secondary screening means to receive the water and fine material passing through all the openings of the first mentioned chute. I

29. The combination with a boat, of a substantially unobstructed inclined chute extending lengthwise of the boat over the hold thereof, means for delivering solid material with a relatively'large proportion of water to the upper portion of the chute and causing them to flow down the chute at a relatively rapid rate, there being a longitudinal series of spaced apart screened openings in the bottom of the chute over which thejmaterial passes in succession and through each of which some of the water and a portion of the material of all grades to be retained may pass and over which the refuse material is moved along down the chute by the water, secondary screening means arranged transversely of the boat axis to receive the water and materialpassingthrough each of said screened openings, and -meansextending beneath said. screenlng means and arranged longitudinal- 1y of the boat for directing the water and'fine material passing throu h said screening means to a difl'erent location on the boat.

30. In a separating apparatus, an inclined chute the length of which is many times its width, means for delivering solid materials and a relatively large volume of water tothe upper end of said chute and causing them to.

flow down the chute at a relatively rapid rate, said chute having screened openings in the bottom at intervals along its length to each discharge a small portion of the water and materials small enough to pass through each of said screened openings, secondary screenmg means arranged to recelve the water and material from said screened openings in the receiving all the water and finer particles passing through said screen means and conveying them away by the flow of the water content thereof. a

HOWARD S. GERKEN.

DISCLAIMER 1,729,07O.H0ward S. Gerlcen, Buffalo, N. Y. APPARA'rus FonWAsHnve, SEP- ARATING, AND GRADING MATERIALS. Patent dated September 24, 1929. Disclaimer filed June 7, 1934, by the assignee, Gravel Products Corporation.

Hereby enters this disclaimer to that part of the claim in said specification, which consists of claims numbered 26 and 27, which arein the following words, to wit: Y

26. The combination with a boat, of a substantially unobstructed inclined chute extending lengthwise of the boat over the hold thereof, means arranged to deliver water, sand and gravel under pressure to the upper portion of the chute andcause them to flow down the chute at a relatively high velocity, a succession of primary screens along thebottom of the chute over which said material passes in succession and through which some of the water, sand and gravel pass, while the refuse material is moved along down the chute by. the water to discharge beyond the screens, a plurality of secondary screens arranged along the chute to receive v the water, sand and gravel passing through said primary screens and separate the gravel therefrom and discharge the gravel into the hold of the boat to the side of the chute, and independently adjustable gates for controlling the delivery of material through the several primary screens to said secondary screens, whereby the delivery of gravel to different parts of the boat lengthwise and crosswise thereof can be regulated as desired.

27. The combination with a boat, of a substantially unobstructed inclined chute extending lengthwise of the boat over the hold thereof, means for delivering i solid material with a relatively large proportion of water to the upper portion of the chute and causing them to flow down the chute at a relatively high velocity, a longitudinal series'of spaced apart screened openings'in'the bottom-of the chute over which the material passes in succession and through each of which some of a the water and a portion of the material of all grades to be retained may pass and over which the refuse material is moved along down the chute by the water, secondary screening means arranged to receive the water and material passing through each of said screened openings, said secondary screening means and means cooperating therewith acting to separate the coarse material from the water and finer material and direct the separated different materials to different locations on the boat.

[Ofiicial Gazette June 26, 1934.]

DISCLAIMER 1,729,070.Howard S. Gerken, Buffalo, N. Y. APPARATUS FOR WASHING, SEPA- RATING, AND GRADING MATERIALS. Patent dated September 24, 1929. Disclaimer filed November 14, 1935, by the assignee, Gravel Products Corporation.

Hereby enters disclaimer to that part of the claims in said specification which is in the following words, to wit:

16. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means for delivering water and solid material to the upper portion of the chute and causing them to flow down the chute at a relatively high velocity, a succession of primary screens along the bottom of the chute and over which the material passes in succession and through which some of the water and material pass while the refuse material is moved along down the chute over said screens by the water, secondary screening means arranged to separately receive the water and material passing through each of the primary screens and deliver the coarse material tailing oil of the secondary screening means to a desired point, means arranged to receive the water and finer material passing through said secondary screening means and direct the same to a different point, and means for selectively regulating as desired the quantity of material passing through the different primary screens.

17. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means for delivering water and solid material to the upper portion of the chute and causing them to flow down the chute at a relatively high velocity, a succession of screens along the bottom of the chute over which the material passes in succession and through which some of the water and material pass while the refuse material is moved along down the chute over said screens by the water, an inclined second chute arranged lengthwise below said first chute, secondary screening means arranged to separately receive the water and material passing through each of said chute screens and direct the coarse material tailing off the secondary screening means away from said second chute, the water and finer material passing through said secondary screening means being received and conducted by said second chute away from the tailings from said secondary screening means, and controlling means for selectively regulating the quantity of material passing through the different chute screens as desired.

18. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means for delivering water and solid material to the upper portion of the chute and causing them to flow down the chute at a rela tively high velocity, a succession of primary coarse screens along the bottom of the chute and over which the material passes in succession and through each of which some of the water and a portion of the material of all grades to be retained may pass while the refuse material is moved along down the chute over said screens by the water, an inclined second chute arranged lengthwise below and substantially parallel to said first chute, and a plurality of secondary finer screens each arranged to receive the water and solid material passing "through one of the primary screens and deliver the coarse material tailing off of the secondary screens away from said second chute, the water and material passing through said secondary screens being received by said second chute and kept away from the tailings from said secondary screens.

'19. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means for delivering water and solid material to the upper portion of the chute and causing them to flow down the chute at a relatively high velocity, a succession ofprimary coarse screens along the bottom of the chute and over which the material passes in succession and through each of which some of the water and a portion of the material of all grades to be retained may pass while the refuse material is moved along down the chute over said screens by the water, an inclined second chute arranged lengthwise below said first chute, and a plurality of secondary screens each arranged to receive the water and solid material passing through one of the primary screens and deliver the coarse material tailing off of'the secondary screens away from said second chute, means for directing the water and material passing through said secondary screens to said second chute for carrying the same away from the tailings from said secondary screens, and means for selectively regulating as desired the quantity of material passing through the different primary screens. 7

20. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means for delivering water and solid material to the upper portion of the chute and causing them to flow down the chute at a relatively high velocity, a succession of primary coarse screens along the bottom of the chute and over which the material passes in succession and through which some of the water and material pass while the refuse material is moved along down the chute over said screens by the water, a plurality of inclined secondary screens each disposed to receive the water and material passing through one of the primary screens and deliver the tailings from said secondary screens laterally away from said second chute, means arranged to direct the water and material passing through said secondary screens away from the tailings therefrom, and means for selectively regulating as desired the quantity of material passing through the different primary screens.

'21. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means for delivering water and solid material to the upper portion of the chute and causing them to flow down the chute at a relatively high velocity, a succession of screens along the bottom of the chute over which the material passes in succession and through which some of the water and material pass while the refuse material is moved along down the chute over said screens by the water, oppositely arranged lateral secondary screens, each disposed to receive the water and material passing through one of the chute screens, and to direct the tailings from said secondary screens to opposite sides of said chute to different desired points, means arranged to direct the water and material passing through said secondary screens away from the tailings therefrom, and means for selectively regulating as desired the quantity of material passing through the different chute screens.

22. In an apparatus of the character described, the combination of a substantially unobstructed inclined chute, means arranged to deliver liquid and solid material under pressure to the upper portion of the chute and cause them to flow down the chute at a relatively high velocity, a succession of spaced primary screens along the bottom of the chute and separated by imperforate chute bottom portions and over which said material passes in succession and through each of which some of the liquid and a portion of the solid material of all grades to be retained may pass, while the refuse material is moved along down the chute by the liquid to discharge 'beyond the screens, secondary screening means arranged to separately receive the liquid and solid material passing through each of the primary screens and direct the solid material tailing off of the secondary screening means to a desired point, and means arranged to direct the liquid and fine material passing through said secondary screening means away from the solid material tailing off of the secondary screening means.

23. The combination with a boat, of a substantially unobstructed inclined chute extending lengthwise of the boat over the hold thereof, means arranged to deliver water, sand and gravel under pressure to the upper portion of the chute and cause them to flow down the chute at a relatively high velocity, a succession of primary coarse screens along the bottom of the chute over which said material passes in succession and through each of which some of the water and a portion of the sand and gravel of all grades to be retained may pass, while the refuse material is moved along down the chute by the water to discharge beyond the screens, a plurality of secondary screens each arranged to receive the water, sand and gravel passing through one of the primary screens and direct the gravel into the hold of the boat, said secondary screens being adapted to direct the gravel to different desired points lengthwise of the boat and means arranged to keep separated from the gravel and to discharge overboard the water passing through the chute screens and said secondary screens.

24. The combination with a boat, of a substantially unobstructed inclined chute extending lengthwise of the boat over the hold thereof, means arranged to deliver water, sand and gravel under pressure to the upper portion of the chute and cause them to flow down the chute at a relatively high velocity, a succession of primary screens along the bottom of the chute over which said material passes in succession and through which some of the water, sand and gravel pass, while the refuse material is moved along down the chute by the water to discharge beyond the screens, secondary screening means arranged to receive the water, sand and gravel passing through each of the primary screens and direct the gravel into the hold of the boat, means arranged to keep separated from the gravel and to discharge overboard the water passing through the primary screens and said secondary screening means, and means for independently controlling the discharge of the material through the several primary screens whereby the delivery of gravel from the secondary screening means tfi different parts of the boat can be regulated as may be necessary to evenly load t e oat.

25. The combination with a boat, of a substantially unobstructed inclined chute extending lengthwise of the boat over the hold thereof, means arranged to deliver water, sand and gravel under pressure to the upper portion of the chute and cause them to flow down the chute at a relatively high velocity, a succession of primary screens along the bottom of the chute over which said material passes in succession and through which some of the water, sand and gravel pass, while the refuse material is moved along down the chute by the Water to discharge beyond the screens, a plurality of secondary screens each arranged to receive the water, sand and gravel passing through one of the primary screens and direct the gravel into the hold of the boat, means arranged to discharge overboard the water passing through the primary screens and said secondary screens, and independently adjustable gates for controlling the dischargethrough the several primary screens whereby the delivery of gravel to different parts of the boat can be regulated as desired.

28. In an apparatus for separating solid materials from water, the combination of a stationary inclined chute the length of which is many times its width, means for delivering solid materials with a relatively large volume of water to the upper portion of the chute and causing them to flow down the chute at a relatively high velocity, said chute being constructed to provide bottom openings through which the water and solid material are adapted to discharge from the chute at a plurality of points along the length of the chute, said openings being of such dimensions and character and said chute being so constructed that a portion of the Water and material of all grades to be retained may discharge from the chute through each of said openings while a relatively large volume of the Water will flow at a high velocity down the chute over said openings and move refuse material over the openings for discharge beyond the openings, a second chute arranged to receive the water and material discharging through said first chute openings and along which the water is adapted to flow for discharge at a desired point, and secondary screening means arranged to receive the Water and material discharging from each of said chute openings and direct the coarser material away from said second chute while said second chute being disposed relatively to said secondary screening means to receive the water and fine material passing through all the openings of the first mentioned chute.

29. The combination with a boat, of a substantially unobstructed inclined chute extending lengthwise of the boat over the hold thereof, means for delivering solid material with a relatively large proportion of water to the upper portion of the chute and causing them to flow down the chute at a relatively rapid rate, there being a longitudinal series of spaced apart screened openings in the bottom of the chute over which the material passes in succession and through each of which some of the water and a portion of the material of all grades to be retained may pass and over which the refuse material is moved along down the chute by the Water, secondary screening means arranged transversely of the boat axis to receive the water and material passing through each of said screened openings, and means extending beneath said screening means and arranged longitudinally of the boat for directing the water and fine material passing through said screening means to a different location on the boat.

"30. In a separating apparatus, an inclined chute the length of which is many times its Width, means for delivering solid materials and a relatively large volume of water to the upper end of said chute and causing them to flow down the chute at a relatively rapid rate, said chute having screened openings in the bottom at intervals along its length to each discharge a small portion of the water and materials small enough to pass through each of said screened openings, secondary screening means arranged to receive the water and material from said screened openings in the chute and divert laterally the larger particles thereof, said secondary means being adapted to pass the water and other particles received from said screened openings and a means for receiving all the water and finer particles passing through said screen means and conveying them away by the flow of the water content thereof.

[Ofiicial Gazette December 17, 1.985.]

DISCLAIM EIR 1,729, 07O.H0ward S. Gerlcen, Buffalo, N. Y. APPARATUS FOR WASHING, SEP- ARATING, AND GRADING MATERIALs. Patent dated September 24, 1929. Disclaimer filed June 7, 1934, by the assignee, Gretel Products Corporation.

Hereby enters this disclaimer to that part of the claim in said specification, which consists of claims numbered 26 and 27, which are in the following words, to wit: 7

26. The combination with a boat, of a substantially unobstructed inclined chute extending lengthwise of the boat over the hold thereof, means arranged to deliver water, sand and gravel under pressure to the upper portion of the chute and cause them to How down the chute at a relatively high velocity, a succession of primary screens along the bottom of the chute over which said material passes in succession and through which. some of the water, sand and gravel pass, while the refuse material is moved along down the chute by the water to discharge beyond the screens, a plurality of secondary screens arranged along the chute to receive the Water, sand and gravel passing through said primary screens and separate the gravel therefrom and discharge the gravel into the hold of the boat to the side of the chute, and independently adjustable gates for controlling the delivery of material through the several primary screens to said secondary screens, whereby the delivery of gravel to different parts of the boat lengthwise and crosswise thereof can be regulated as desired.

27. The combination with a boat, of a substantially unobstructed inclined chute extending lengthwise of the boat over the hold thereof, means for delivering solid material with a relatively large proportion of water to the upper portion of the chute and causing them to flow down the chute at a relatively high velocity, a longitudinal series of spaced apart screened openings in the bottom of the chute over which the material passes in succession and through each of which some of the water and a portion of the material of all grades to be retained may pass and over which the refuse material is moved along down the chute by the water, secondary screening means arranged to receive the water and material passing through each of said screened openings, said secondary screening means and means cooperating therewith acting to separate the coarse material from the water and finer material and direct the separated diflerent materials to dill'erent locations on the boat.

[Ofict'al Gazette June 26, 1934.]