US1294309A - Inclined screen. - Google Patents

Inclined screen. Download PDF

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US1294309A
US1294309A US22413818A US22413818A US1294309A US 1294309 A US1294309 A US 1294309A US 22413818 A US22413818 A US 22413818A US 22413818 A US22413818 A US 22413818A US 1294309 A US1294309 A US 1294309A
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ore
frame
rod
pockets
screens
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US22413818A
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Lewis G Rowand
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New Jersey Zinc Co
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New Jersey Zinc Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12Apparatus having only parallel elements

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  • mr norms rum co4 momuma., msumcmu, nv r iran srarns 'PATENT orme LEWIS G, ROWAND, OF BROOKLYN, NEW YORK, ASSIGN OR 'IO THE'NEW JERSEY ZINC COMPANY, OF NEW YORK, N. Y., A CORPORATION 0F NEW JERSEY.
  • the present invention relates to improvements in inclined screens especially adapted for the screening of ores.
  • Inclined screens for thispurpose have heretofore been constructed of al number of separate screen sections fixed upon an inclined frame, and having screening surfaces of suitable mesh to cause successive removal of particles of increasing size as the ore falls over the sections.
  • the screens are placed within an inclosed chamber provided with pockets to receive the screenings, and doors are provided in order to permit access to the chamber. Since the screens are of considerable height, the doors carry steps or stair rounds upon which an operator may ascend to clean out any of the screen sections which may have become clogged in service, and also to reach the gateway for controlling the supply of ore to the apparatus, this gateway being located at the upper end of the apparatus.
  • Apparatus of the type referred to above possesses certain disadvantages, inasmuch as the screen sections are fixed in place so that it is a. somewhat diiiicult matter to properly clean them, as the particles become wedged in the meshes of the screens and thev operator cannot reach the under surface of the screen to brush out these wedged particles.
  • the supply gateway is located at the top of the apparatus, it is necessary for the operator to ascend kthe apparatus every time he wishes to stop or start the flow of ore, or to change the size of the supply opening.
  • Thepresent invention seeks to overcome he disadvantages of prior apparatus of the general type described above by providing an inclined screen, especially adapted for the screening of ores, in which each screen section is adjustably mounted so that the angle of inclination of the screening surface may be altered within certain limits,y and in which this screening surface is hinged to the frame of the section, so that it may be tipped to permit it to be cleaned from both sides.
  • Another improvement in the appz.- ratus of the present invention consists in connecting the gateway for controlling the supply of ore to the screens to an operating ⁇ rod extending the entire length of the apparatus, and serving in addition as a hand rail for use by an operator in ascending or descending over the screen.
  • the operating rod is provided at intervals with handles by which it may be manipulated by an operator to control the gateway from any point of the apparatus, thus resulting in a material saving of the operators time over the former apparatus in which the operator is obliged to ascend to the top every time he wishes to manipulate the gateway.
  • the mechanism for operating the gateway is also provided with devices by means of which the size of t-he ore discharge opening may be regulated.
  • FIG. l is a side elevation principally in section
  • Fig. 2 is a plan view with parts in section along the line 2-2 of Fig. l
  • Fig. 3 is an enlarged view of ak portion of Figfl
  • Fig. i is a transverse sectionalong the line 4 4 of Fig. 3
  • Fig. 5 is a transverse section along the line of Fig. l
  • Fig. 6 is a transverse section through the ore supply hopper along the line 6 6 of Fig. l.
  • the frame of the apparatus is composed of side members or girders l0 set at the proper inclination, which in the embodiment here shown is approximately to the horizontal.
  • the'girders are fastened between angle bars 1l forming the base of the apparatus and connected to other angle bars 12 attached to t-he floor.
  • a divider 13 which serves to brace these bars and to Separate the base of the llO j upper end lof the apparatus is a transverse frame 17 which serves as a support for the feed hopper 18 into which the, ore is supplied in any convenient manner.
  • a rod 21 has one end connected to the gate, and its other end is connected toV an arm 22 mounted on theupper end of an operating rod 23, which passes through a bearing in a T 24 attached to the outer end of a post'25 set in a floor flange 26 mounted upon a cross bar 27, which extends across the frontofV the apparatus and is attached to the girders 10 byangle irons 28.
  • the lower end of the operating rod 23 passes through a bearing member 29 on the end of another post 25 similar to, and attached in the same manner as the post at the top of the apparatus.
  • a spring ⁇ 30 surrounds the lower end of the rod between the upper ⁇ face of the .bearing member 29 and a collar 31 which may be adjustably attached to the rod 23.
  • a number of operating handles 32 are attached tothe rod 23,
  • handles should preferably be arranged so that they may be adjusted longitudinally of the rod to bring vthem into position where they may be conveniently reached by an operator from various points of the apparatus.
  • the T 24 ln connection with the above described mechanism for operating the gate 19, there is provided in the T 24a fixed stop 33, andan adjustable stop 34 in the forni of a plate having a slot through whichr passes a-clamping bolt 35 threaded into the
  • the arm 22 is provided with a reduced end as at 36 adapted to engage either of the stops 330i" 34 to limit ythe movement of the arm and consequently the extent of opening Vof the gateway.
  • rlhe ore screeningV devices of the apparatus comprises a pluralitly of pockets and screen sections arranged between tliegirders 10, and ofthe requisite number necessary to produce the desired successive screening of the ore during its passage through'the apparatus.
  • the upper pocket 40 which lies just below the discharge end of the feed hopper 18 has Vend portions 41 attached to the girders 10 by bolts, and a transverse shelf portion 42 to which is attached a wearing plate 43, which is constructed of hard steel and is provided with slots through which pass bolts 44 by means of which the position of the wearing plate upon the shelf of the pocket may be adjusted.
  • Each of the other pockets 45 has side portions by Y which it is attached to the girders 10,-andy has a rear shelf 46 similar to the shelf of the pocket 40, and having attached thereto a steel wearing plate 47.
  • These pockets are also provided with front shelvesY 48 to A which steel wearing plates 49 similar to the wearing plates 47 are adjust-ably attached.
  • Each of the screen sections 0f the apparatus comprises a screen 50, preferably'formed cfa metal plate perforated with narrowy slots of a. width suitable to permit the passage of ore particles ofv a certain size', the
  • Each screen (plate is mounted in a rectangular frame 51,
  • each frame is attached at its lower end by hinges 52 to a support 53.
  • the supports are bolted to inclined members 54 extending between the ends of the pockets-45, and preferably formedas continuations of the rear shelves 46 of these pockets. Slots are provided ⁇ in either or both the Vmembers y54V andthe supports 53 to permit the yangle of inclination of. thescreen frames to be altered within cert-ain limits.v When the screen frames are in normal position, their upper Y ends rest on ledges 'formed by projections 55 A at the bottom of the rear shelves ofthe pockets.
  • the lowermost rscreen frame has its support 53 adjustably attached to Vthe inclinedl face 57 of a triangular bracket 58 which'is Vattached to the basevfrranie ofthe apparatus.
  • a'series of ypockets formed by means of liners 60 which are bolted to the girdei's 10 and are providedY with outwardly extending lugs 61 forming.
  • screenings of one size should preferably be provided with a chute 63 through which The pockets. which ,receive these screenings may be discharged, and there should be as many of these chutes as there are screens of different mesh, excepting at the bottom of the apparatus where the last screenings fall into one of the hoppers 14.
  • the choke bars should be extended as indicated at 62 in Fig. l, in order to prevent any screenings from falling into lower pockets.
  • the posts 25 are mounted upon transverse members 27 which are attached to the girders 10 by angle irons 28,but in addition to the transverse members to which the posts are att-ached there are a number of others throughout the length of the apparatus.
  • These transverse members serve as supports to which the covers of the apparatus are attached, and also serve as abutments for the lower ends of the covers, as well as for the screen frames when the latter are in open position.
  • Each of the covers comprises a frame work 65 hinged as at 66 to one of the transverse members 27, and having its lower end formed to rest upon the upper edge of the next lowest member 27.
  • Each cover is provided with brackets 67 and between these brackets are rounds 68 which form steps.
  • each cover Pivoted to each cover are latches 68', which as shown most clearly in F ig. 3 are adapted to fit over the stair rounds of the cover immediately above to hold the cover open.
  • a hinged cover 69 which when turned into the dotted line position permits access to the gate mechanism associated with the feed hopper.
  • This cover is provided with a staple or hook 70 to which the latch of the upper door may be attached.
  • the lore is supplied to the feed hopper 18, and when the gate 19 is opened the orefdrops into the upper pocket 40 and when a ⁇ pile of ore has accumulated on shelf 42 -it falls over the edge of the wearingplate of this pocket and drops onto the screening surface. Particles of a size to pass through this screen will fall into the receiving pocketsat the rear of the apparatus, while the over size particles will fall upon the front shelf 48 of the pocket 45 and when sufficient material has accumulated on this shelf, it will fall off over the wearing plate 49 onto t ie rear shelf of the same pocket and from the lat-ter, it will pass over the wearing plate 47 yonto the screening surface immediately below.
  • this screening surface is supposed to be of the same mesh as the first one, and thus will screen out particles which failed to go through the lil-st screen. These particles will fall into the receiving pockets and as the latter become sufciently filled, the material will flow over the choke bars, and finally pass into the chu-te 68.
  • the size of the ore feed opening may be altered to suit the particular ore that is being screened and after the stop khas been set for an opening ⁇ of a certain size, the same size of opening will'always be presented whenever the gate is manipulated.
  • the inclination of the screening surfaces may be altered within certain limits, preferably between 350 and 45o to the horizontal, by means o-f the bolt and slot connections of the supports 53, and the operator may effect this adjustment by reaching through the doorways on the front of the apparatus.
  • the screening surfaces may be thoroughly cleaned, they may also be set at the proper inclination for producing the most effective screening, and ore may be supplied at the rate adapted for; best results.
  • a considerable saving of the operators time may be effected by the provision of the operating rod, which may be manipulated from any part of the apparatus to control the operation of the gate, and in fact, the gate may even be manipulated from the ground by providinga handle 32 which may be reached by an operator at ⁇ the base of the apparatus.
  • Vore screening apparatus provided with an inclined frame and ore pockets mounted on the frame, the combination of supports adjustably attached to the upper ends of the pockets, and inclined screens each having one end pivoted to one of said supports and the other end resting upon thebottom of an adjacent pocket.
  • an inclined frame having at its upper end an ore-feed hopper provided'r with a gate, theV combination of an operatingrod rotatably mountedupon the Vframe and eX# tending from top to bottom thereof, handles r-.djustablv mounted upon the rod, andan y operating connection betweenthe rod and the gate.
  • ore screening ⁇ apparatus provided with an inclined frame. having at its upper end an ore-feed hopper provided vwithvf a Y gate, the combination of posts mountedl upon the forward edge of the frame, a rod rotatably mounted in said posts inconvenient position to be used as' a hand-rail, handles adj ustably mounted on the rod and by means Y of which the rod may be'rotated,an arm attached to the upper end of the rod and a connection between the arm and the gate.
  • VIn ore screening apparatus provided with an inclined frame having at its upper end an ore-feed hopper provided with a gate,
  • ore screening apparatus provided with an inclined frame having ore pockets mounted therein and an ore feed hopper at the upper end of the frame provided with a gate for controlling the feed of ore to the apparatus, the combination of inclined screens each having one end pivoted to a pocket and the other end resting upon an adjacent pocket, bars attached to the front of the frame upon which the screens may rest when swung from normal position, said bars also forming steps along the front of the frame, and means whereby an operator may control the gate from the vicinity of any of the screens, said means comprising a rod extending along the frame, an arm on theupperend Iof the rod and a connect-ion between the arm and the gate, said rod also serving as a hand-rail for an operator when upon the steps.
  • ore screening apparatus provided with an inclined frame having steps along the front face, ore pockets molmted within the frame, and an ore feed hopper and gate at the upper end of the frame, the combination of a plurality of inclined screens each of which is pivotally attached to a pocket so that it may be swung forwardly and supported upon a step in position to be cleaned by an operator upon the steps, and means whereby the operator may at the saine time control the feed of ore to the pockets and screens, said means comprising a rod extending along the frame, adjustable operating handles upon the rod and a connection between the rod and the gate.

Description

L. G. ROWAND.
INCLINED SCREEN. APPLicATIoN FILED MAR. 23. 1918.
1,294,309. Y Patented Feb. 11, 1919.
` 3 SHEETS-s115511.
IN VEN TOR. ew/'5 #0n/and ATTORNEY L. G. ROWAND. v
lNCLINED SCREEN.
APPLICATION .FILED MAR. 23. 19m.
,294,309. Patented Feb.11,1919.
3 SHEETS-SHEEI 2.
6.9 Egg,
l0 40 INI" f a:
Figi Q L. G. ROWAND.
INCLINED SCREEN.
APPLICATION FILED MAR. 23, 191s.
l ,294, 309 I, Patented Feb. l1, 1919.
[NI/EN TOR. fw/5 6. /fnwawd ATTORNEYS.
mr norms rum: co4 momuma., msumcmu, nv r iran srarns 'PATENT orme LEWIS G, ROWAND, OF BROOKLYN, NEW YORK, ASSIGN OR 'IO THE'NEW JERSEY ZINC COMPANY, OF NEW YORK, N. Y., A CORPORATION 0F NEW JERSEY.
INCLINED SCREEN.
Specification of Letters Patent.
Patented Feb. 11, 1919.
To @ZZ whom it may concern.'
Be it known that I, LEWIS G. RowAND, a citizen of the United States, residing at Sea Gate, borough of Brooklyn, in the county of Kings, city and State of New York, have invented certain new and useful Improvements in Inclined Screens; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
The present invention relates to improvements in inclined screens especially adapted for the screening of ores. Inclined screens for thispurpose have heretofore been constructed of al number of separate screen sections fixed upon an inclined frame, and having screening surfaces of suitable mesh to cause successive removal of particles of increasing size as the ore falls over the sections. The screens are placed within an inclosed chamber provided with pockets to receive the screenings, and doors are provided in order to permit access to the chamber. Since the screens are of considerable height, the doors carry steps or stair rounds upon which an operator may ascend to clean out any of the screen sections which may have become clogged in service, and also to reach the gateway for controlling the supply of ore to the apparatus, this gateway being located at the upper end of the apparatus.
Apparatus of the type referred to above possesses certain disadvantages, inasmuch as the screen sections are fixed in place so that it is a. somewhat diiiicult matter to properly clean them, as the particles become wedged in the meshes of the screens and thev operator cannot reach the under surface of the screen to brush out these wedged particles. Furthermore, since the supply gateway is located at the top of the apparatus, it is necessary for the operator to ascend kthe apparatus every time he wishes to stop or start the flow of ore, or to change the size of the supply opening. In practice, it is frequently desirable to change the inclination of the screening surfaces, lbut in apparatus as usually constructed, the screening surfaces are fixed in place so that they cannot be altered without a considerable reorganization of the apparatus.
Thepresent invention seeks to overcome he disadvantages of prior apparatus of the general type described above by providing an inclined screen, especially adapted for the screening of ores, in which each screen section is adjustably mounted so that the angle of inclination of the screening surface may be altered within certain limits,y and in which this screening surface is hinged to the frame of the section, so that it may be tipped to permit it to be cleaned from both sides. Another improvement in the appz.- ratus of the present invention consists in connecting the gateway for controlling the supply of ore to the screens to an operating` rod extending the entire length of the apparatus, and serving in addition as a hand rail for use by an operator in ascending or descending over the screen. The operating rod is provided at intervals with handles by which it may be manipulated by an operator to control the gateway from any point of the apparatus, thus resulting in a material saving of the operators time over the former apparatus in which the operator is obliged to ascend to the top every time he wishes to manipulate the gateway. The mechanism for operating the gateway is also provided with devices by means of which the size of t-he ore discharge opening may be regulated.
Other objects and advantages of the present invention will appear more clearly 'from a description of a preferred embodiment thereof as illustrated in the accompanying drawings in which Figure l is a side elevation principally in section; Fig. 2 is a plan view with parts in section along the line 2-2 of Fig. l; Fig. 3 is an enlarged view of ak portion of Figfl; Fig. i isa transverse sectionalong the line 4 4 of Fig. 3; Fig. 5 is a transverse section along the line of Fig. l and Fig. 6 is a transverse section through the ore supply hopper along the line 6 6 of Fig. l.
Referring to the drawings in which similar reference characters denote similar parts throughout the several views, the frame of the apparatus is composed of side members or girders l0 set at the proper inclination, which in the embodiment here shown is approximately to the horizontal. At their lower ends, the'girders are fastened between angle bars 1l forming the base of the apparatus and connected to other angle bars 12 attached to t-he floor. Between the angle bars 1l is a divider 13 which serves to brace these bars and to Separate the base of the llO j upper end lof the apparatus is a transverse frame 17 which serves as a support for the feed hopper 18 into which the, ore is supplied in any convenient manner. The lower end of the feed hopper is closed by a gate 19 pivoted as kshown most clearly in Fig. 6 to lugs 20 projecting from. the wall of the hopper.y A rod 21 has one end connected to the gate, and its other end is connected toV an arm 22 mounted on theupper end of an operating rod 23, which passes through a bearing in a T 24 attached to the outer end of a post'25 set in a floor flange 26 mounted upon a cross bar 27, which extends across the frontofV the apparatus and is attached to the girders 10 byangle irons 28. The lower end of the operating rod 23 passes through a bearing member 29 on the end of another post 25 similar to, and attached in the same manner as the post at the top of the apparatus. In, order to take up the weight of the operating rod 23, a spring` 30 surrounds the lower end of the rod between the upper `face of the .bearing member 29 and a collar 31 which may be adjustably attached to the rod 23. A number of operating handles 32 are attached tothe rod 23,
and these handles should preferably be arranged so that they may be adjusted longitudinally of the rod to bring vthem into position where they may be conveniently reached by an operator from various points of the apparatus. ln connection with the above described mechanism for operating the gate 19, there is provided in the T 24a fixed stop 33, andan adjustable stop 34 in the forni of a plate having a slot through whichr passes a-clamping bolt 35 threaded into the The arm 22 is provided with a reduced end as at 36 adapted to engage either of the stops 330i" 34 to limit ythe movement of the arm and consequently the extent of opening Vof the gateway.
rlhe ore screeningV devices of the apparatus comprises a pluralitly of pockets and screen sections arranged between tliegirders 10, and ofthe requisite number necessary to produce the desired successive screening of the ore during its passage through'the apparatus. The upper pocket 40 which lies just below the discharge end of the feed hopper 18 has Vend portions 41 attached to the girders 10 by bolts, and a transverse shelf portion 42 to which is attached a wearing plate 43, which is constructed of hard steel and is provided with slots through which pass bolts 44 by means of which the position of the wearing plate upon the shelf of the pocket may be adjusted. Each of the other pockets 45 has side portions by Y which it is attached to the girders 10,-andy has a rear shelf 46 similar to the shelf of the pocket 40, and having attached thereto a steel wearing plate 47. These pockets are also provided with front shelvesY 48 to A which steel wearing plates 49 similar to the wearing plates 47 are adjust-ably attached.
Each of the screen sections 0f the apparatus comprises a screen 50, preferably'formed cfa metal plate perforated with narrowy slots of a. width suitable to permit the passage of ore particles ofv a certain size', the
`screens having the narrowest slots being atl the top 'of the apparatus. Each screen (plate is mounted in a rectangular frame 51,
and each frame is attached at its lower end by hinges 52 to a support 53. The supports are bolted to inclined members 54 extending between the ends of the pockets-45, and preferably formedas continuations of the rear shelves 46 of these pockets. Slots are provided `in either or both the Vmembers y54V andthe supports 53 to permit the yangle of inclination of. thescreen frames to be altered within cert-ain limits.v When the screen frames are in normal position, their upper Y ends rest on ledges 'formed by projections 55 A at the bottom of the rear shelves ofthe pockets. llVhen in lopen position the ends of the frames rest upon/the cross bars 27 at Vthe front of thev apparatus.y While the screen fra-nies extend substantially from kone girder to the other, there may be narrow spaces at their ends through which .unscreened ore might fall. 1n ordervt-o fill these spaces, wooden strips` 56placed on and attached to the girders 10 areV provided. V.At their upper ends, these strips are fitted 'bee neath the rear shelves 46 of the pockets,-and` at their lower ends they fit against the memf bers 54. or closely adjacent the'supports 53 in case the latter extend completely to the girders- The lowermost rscreen frame has its support 53 adjustably attached to Vthe inclinedl face 57 of a triangular bracket 58 which'is Vattached to the basevfrranie ofthe apparatus.
For the purpose of collecting the particlesk of ore after they have'passed through the screens, there is provided a'series of ypockets formed by means of liners 60 which are bolted to the girdei's 10 and are providedY with outwardly extending lugs 61 forming.
slots withinwhich are inserted transverse choke bars 62 formingthe bottom of each of the pockets. screenings of one size should preferably be provided with a chute 63 through which The pockets. which ,receive these screenings may be discharged, and there should be as many of these chutes as there are screens of different mesh, excepting at the bottom of the apparatus where the last screenings fall into one of the hoppers 14. At the points where the chutes are led off, the choke bars should be extended as indicated at 62 in Fig. l, in order to prevent any screenings from falling into lower pockets.
As has been previously stated, the posts 25 are mounted upon transverse members 27 which are attached to the girders 10 by angle irons 28,but in addition to the transverse members to which the posts are att-ached there are a number of others throughout the length of the apparatus. These transverse members serve as supports to which the covers of the apparatus are attached, and also serve as abutments for the lower ends of the covers, as well as for the screen frames when the latter are in open position. Each of the covers comprises a frame work 65 hinged as at 66 to one of the transverse members 27, and having its lower end formed to rest upon the upper edge of the next lowest member 27. Each cover is provided with brackets 67 and between these brackets are rounds 68 which form steps. Pivoted to each cover are latches 68', which as shown most clearly in F ig. 3 are adapted to fit over the stair rounds of the cover immediately above to hold the cover open. At the top of the apparatus is a hinged cover 69 which when turned into the dotted line position permits access to the gate mechanism associated with the feed hopper. This cover is provided with a staple or hook 70 to which the latch of the upper door may be attached.
In the operation of the apparatus described above the lore is supplied to the feed hopper 18, and when the gate 19 is opened the orefdrops into the upper pocket 40 and when a `pile of ore has accumulated on shelf 42 -it falls over the edge of the wearingplate of this pocket and drops onto the screening surface. Particles of a size to pass through this screen will fall into the receiving pocketsat the rear of the apparatus, while the over size particles will fall upon the front shelf 48 of the pocket 45 and when sufficient material has accumulated on this shelf, it will fall off over the wearing plate 49 onto t ie rear shelf of the same pocket and from the lat-ter, it will pass over the wearing plate 47 yonto the screening surface immediately below. After the pockets become filled the ore will fall upon ore and thus have less tendency to abrade the metal of which the pockets are formed. The wearing platesI being of hard steel are not so readily abraded iby the; ore falling over them. ln the preferred embodiment, this screening surface is supposed to be of the same mesh as the first one, and thus will screen out particles which failed to go through the lil-st screen. These particles will fall into the receiving pockets and as the latter become sufciently filled, the material will flow over the choke bars, and finally pass into the chu-te 68. The ore will continue its course throughout the entire length of the apparatus, particles yof gradually increasing size being successively removed and finally the particles that are too large to pass through any of the screens will fall onto the horizontal portion of the bracket 58, and pass over the edge of the latter into the forward hopper 14. The particles of largest size which pass through the lowermost screens will be collected in the pockets at the bottom of the apparatus and flow over the choke bars into the rear hopper 14.
In apparatus of this character, it is necessary to clean the screening surfaces at intervals, and in order to do this in the present case, the operator ascends to the screen sections to be cleaned, and after stopping the feed of ore, lifts the cover of the section to be cleaned, and swings the screen into its onen position. By means of suitable brushes or cleaning implements, he may then clean both sides of the screen, so that any particles which have become wedged in the meshes of the screen will be dislodged by one or the other of the cleaning operations. if at any time, while the operator is upon the apparatus he desires to start or stop the flow of ore therethrough, he may manipulate the gate 19 by rotating the rod 23 by means of the nearest handle 82. At the same time, he
may use the rod 23 for a. hand rail while traveling' over the apparatus. By means of the adjustable stop 34 on the T 24 on the upper end of the apparatus, the size of the ore feed opening may be altered to suit the particular ore that is being screened and after the stop khas been set for an opening `of a certain size, the same size of opening will'always be presented whenever the gate is manipulated. The inclination of the screening surfaces may be altered within certain limits, preferably between 350 and 45o to the horizontal, by means o-f the bolt and slot connections of the supports 53, and the operator may effect this adjustment by reaching through the doorways on the front of the apparatus.
With the apparatus described above, the screening surfaces may be thoroughly cleaned, they may also be set at the proper inclination for producing the most effective screening, and ore may be supplied at the rate adapted for; best results. A considerable saving of the operators time may be effected by the provision of the operating rod, which may be manipulated from any part of the apparatus to control the operation of the gate, and in fact, the gate may even be manipulated from the ground by providinga handle 32 which may be reached by an operator at `the base of the apparatus.
I claim: 1. 'In ore lscreening apparatus provided with an inclined frame and ore pockets mounted on the frame, the combination of a plurality ofinclined screens between the pockets, each of said screens beingpivotedV at one end toa pocket and supported at the other end upon an adjacent pocket.
2. In ore screening apparatus provided with an inclined frame and ore pockets mounted on the frame, the combination of a plurality of inclined screens between the pockets, each of said screens being pivotedy at its lower end to the top of a pocket-and having its upper end supported upon the Ibottom of an adjacent pocket. Y Y
3. In Vore screening apparatus provided with an inclined frame and ore pockets mounted on the frame, the combination of supports adjustably attached to the upper ends of the pockets, and inclined screens each having one end pivoted to one of said supports and the other end resting upon thebottom of an adjacent pocket.
4:. In yore screening apparatus provided with an inclined frame and ore pockets mounted on the frame, the combination of supports adjustably attached tothe upper ends of the pockets, and inclined screens each having its lower end pivoted to one of said supports and its upper end resting upon the bottom of an adj aceiit pocket;
5. In ore screening apparatus kprovided with an inclined frame and ore pockets mounted on the frame, the combination of supports adjustably attached to the upper ends of they pockets, inclined screen frames,
each having one end pivoted to one of said supports and the other end resting upon the bottom of an adjacent pocket, and al screen surface Vmounted on each 'of the frames.
6. In ore screening apparat-us provided with a frame consisting of inclined spaced members and pockets mounted between the members, the combination of a plurality of inclined screens between the pockets, each of said screens being pivoted at one end to a pocket and supported at the other end, when iny operative position, upony an adjacentv tween tliefranie members at the forward' edges thereof and upon which said screens,` may rest when swung intol position to be cleaned, and doors pivoted to said transverse supports and resting upon the forward-n 'edges of the inclined members, through which access may be obtained to the screens. 8. In ore screening apparatus providedwith an inclined frame, having at its upper end an ore-feed hopper provided'r with a gate, theV combination of an operatingrod rotatably mountedupon the Vframe and eX# tending from top to bottom thereof, handles r-.djustablv mounted upon the rod, andan y operating connection betweenthe rod and the gate.
In ore screening apparatus/provided with an inclined frame having at its upper y end an ore-feed hopper provided with a gate, the. combination of means whereby said gate may be operated from any part yof the apparatus, said meansv comprising an operating` rod rotatably mounted upon the frame in substantially parallel relation thereto, and an operating connection between the rod and the gate. Y
l0. In ore screeningappai'atus provided with an inclined frame having at its upper end an ore-feed hopper provided with a gate,` the combination of posts mounted upon the forward edge of the frame, a rod lmounte'd in said posts, aV spring support for the lowerV end of the rod, an arm attached to the upper end of the rod, connection between the arm and the Ofate, and actuating handles adjustably vmounted on the rod. i
l1. In ore screening` apparatus provided with an inclined frame. having at its upper end an ore-feed hopper provided vwithvf a Y gate, the combination of posts mountedl upon the forward edge of the frame,a rod rotatably mounted in said posts inconvenient position to be used as' a hand-rail, handles adj ustably mounted on the rod and by means Y of which the rod may be'rotated,an arm attached to the upper end of the rod and a connection between the arm and the gate.
l2. VIn ore screening apparatus provided with an inclined frame having at its upper end an ore-feed hopper provided with a gate,
the combination of posts mounted upon lthe forward edge of the frame, bearingsupon the outer ends of the posts, a'rod rotatablyY mounted in the bearings, an arm attached to the upper end of thierrod, stops mounted on the bearing of the topmost post for limiting 'Y the moving of the arm, a connection between the arm and the gate, and Voperating handles adjustably mounted on the rod.
13. In ore screening apparatus provided with an inclined frame having at its lupper end an ore-feed hopper provided with a gate., the combination'of posts mounted 'upon the forward edge of the frame, bearing members upon the outer ends of the posts, a rod,
rotatably mounted in the bearing members, an arm attached to the upper end of the rod, a fixed stop and an adjustable stop mounted upon the bearing member of the topmost post and adapted to be engaged by one end of the arm to limit movement thereof, a connection between the other end of the arm and the gate and operating handles adjustably mounted on the rod.
14, In ore screening apparatus provided with an inclined frame having ore pockets mounted therein and an ore feed hopper at the upper end of the frame provided with a gate for controlling the feed of ore to the apparatus, the combination of inclined screens each having one end pivoted to a pocket and the other end resting upon an adjacent pocket, bars attached to the front of the frame upon which the screens may rest when swung from normal position, said bars also forming steps along the front of the frame, and means whereby an operator may control the gate from the vicinity of any of the screens, said means comprising a rod extending along the frame, an arm on theupperend Iof the rod and a connect-ion between the arm and the gate, said rod also serving as a hand-rail for an operator when upon the steps.
l5. In ore screening apparatus provided with an inclined frame having steps along the front face, ore pockets molmted within the frame, and an ore feed hopper and gate at the upper end of the frame, the combination of a plurality of inclined screens each of which is pivotally attached to a pocket so that it may be swung forwardly and supported upon a step in position to be cleaned by an operator upon the steps, and means whereby the operator may at the saine time control the feed of ore to the pockets and screens, said means comprising a rod extending along the frame, adjustable operating handles upon the rod and a connection between the rod and the gate.
in testimony whereof I aiiix my signature.
iinwis e. RowAND.
Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.
US22413818A 1918-03-23 1918-03-23 Inclined screen. Expired - Lifetime US1294309A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456785A (en) * 1965-08-11 1969-07-22 Wilfred L Roller Screen apparatus
US4236998A (en) * 1978-03-03 1980-12-02 Feldmuhle Aktiengesellschaft Process and apparatus for purifying a fibrous suspension

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456785A (en) * 1965-08-11 1969-07-22 Wilfred L Roller Screen apparatus
US4236998A (en) * 1978-03-03 1980-12-02 Feldmuhle Aktiengesellschaft Process and apparatus for purifying a fibrous suspension

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