US484633A - Middlings pueifier - Google Patents

Middlings pueifier Download PDF

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US484633A
US484633A US484633DA US484633A US 484633 A US484633 A US 484633A US 484633D A US484633D A US 484633DA US 484633 A US484633 A US 484633A
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sieve
dust
troughs
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chamber
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING 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
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements

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  • My invention relates to improvements in middlings-purifiers in which a horizontal reciprocating sieve operates in conjunction with a grid of catch-trays and an arrangement of dust-catchers for more thoroughly purifying middlings, semolina, and the like.
  • the object of my improvements are, first, to provide a grid of catch trays or troughs above the horizontal reciprocating sieve; sec 0nd, to afford facilities for separating the loose or small particles from the dust-laden air and depositing the settlings onto the catch-trays, and, third, to reduce the amount of material passing to the offal-sack by means of a second sieve arranged at the tail of the horizontal sieve.
  • Figure 1 is a sideelevation of the machine; Fig. 2, an end elevation of the head of the machine; Fig. 3, an end elevation of the tail of the machine; Fig. 4, a longitudinal section of the entire machine on line .1: at, Fig. 2; Fig. 5,
  • A is the framework orcasing of the machine, which is of ordinary construction and divided into chambers in the usual manner; but it is made narrower than machines now in use;
  • B the Archimedean screw which works in the trough 1) near the base of the machine for conveying the throughs, the material which has passedthrough the sieves, to the rolls, and
  • O the exhaust-fan, which is preferably fixed 1n the .chambers cat the top of the machine.
  • D and E are windows for the inspection, respective ly, of the dust-chamber o, and sieve-chamber a F F are frames provided with louvers for the admission of air below the sieve for purifying the material operated upon.
  • G is a spout for the admission of the material to the feed-roller and hopper II. All the above-described parts and the means for imparting motion to the machine may be of ordinary construction.
  • a reciprocating frame I made of iron or wood, arranged to fit between the sides of the framework A, and preferably to work at a slight inclination longitudinally-that is, from head to tail of the machineand provided with recessesi t' for the reception of frames 2' 2' covered with any suitable reticulated covering, such as silk,wire, or perforated glass, orparchment, which form and are hereinafter termed the main sieve.
  • a grid Suspended above the main sieve, at a distance, say, about an inch, by rods j so as to reciprocate it, is a grid composed of a number of catch trays or troughs J to permit of the dust and other material arising from the main sieve being drawn up between them by the fan 0 and to prevent such material falling back again onto the main sieve 2'
  • the troughs are arranged longitudinally over and parallel, or nearly so, or at a slight angle to the sieve to permit of the material gravitatin g to the tail end of the machine.
  • the catchtrays J maybe made of metal-such as tin or any other suitable material, and may consist of any desired number of hollow single or double troughs, which are shaped somewhat like the letter S, the troughs extending roo K, to ,be hereinafter describede-that is to say, the troughs J are placed about six or eight inches from the head of the machineand ex tend over the second sieve K to, say, about one or two inches fromthe tail end.
  • Each trough J is made of the shape shown at Fig. 'Zthat is,- the bottom or hollow portion j is semicircular about an-inch in diameter, and the upper or deflector lip portion j may be'aninverted semicircle of the same or slightly larger di-- ameter.
  • the said troughs J are arranged parallel, or'nearly so, with each other at sum able distances apart-say about one elighth or! three-sixteenths of aninch-to permit of, the dust and other material arising from the sieve ⁇ i being drawnup between them, and in orderto prevent thesaid material from fall-l, .ing back onto-thesieve the upper rlip po rtion j of each trough is made to overhang the, next trough.
  • V One-half of ,the lipsjjf are ar-i ranged, tooverhang to the right hand and the other half, to the leftrhand, the centertro'ugh; beingiprovided witha lipjf on each side.
  • a second short sieve K. fljhis sieye is arranged at adistance from the sieve *fiof, say, about an inch orso to term a space 15 4
  • the sieve K isclothed with a reticulated co v ering .of. silk,.,wire, or perforated, glass or, parchment of the samewidth as the sieve 11 r and about, say, eight or ten inches in length;
  • the sieve K is arranged to pass through the framework at thetail endof the machine and partments Z Z ,in which are mounted two small worms Z Z which are about, two, or three.
  • Thesidesj oti the main sieve i are also provided wjth lgngi .tndirial troughsorrecesses I,' I' coniniunidat- V ingat the .tail end of ⁇ the mach ne with the second sieve Ktfor catching the loose, orsmla ll particles which are drawniby thetair from the .jtroilg-hs J. To. thesides of the machine-frame .work Almay also ,be fixed.
  • Suitable stops, 1? are also provided for preventing any materia l ,frbm .enteringintothe troughsJ or sidetrays lf 1 from the compartment a i n-which therol ler .is arranged, without previously passing onto the main sieve 11 The spacer?
  • the chamber a above the main sieve i is divided into any desired number of practically air-tight compartments by the partitions .a".
  • Four of such compartments are shown in the drawings.
  • the first of these compartments is placed the fe d roller and hopper H, and to the roefi or division-board n of each of the other compartinen tgat'asuitable distancevabove the main -sieve this or' are fixed one er more Venetian dust-eatchersjN,'ari ranged n to comm'unicatewith'd'usfi-chamber a byrmeans of one'for rj oi'e openings in ,made in thedivision-bo'ard 61 5, ii roug' hj'which the exhaustcurrent; is' drawn for separating the .hseti r Pa t le ,t e i'bin and r i y g theatre-la e Jan.
  • Each dushoatcher consists of any heater-numberof square, polygonal, or circular-tapering louverszor riugs t, hereinafter teimed conical? louvers.
  • each of these conical leuvers' n may,when re'quired, be fixed'aentral parallel tube n' +say'about ,tl r ee ipc hes in; d ainetep 'yfhen the largest diameter'ef the h parl uyers is, say; about twelve inches.
  • Openings are also formed in the division-board a (which forms the roof of chamber a and floor of chamber a) between the dust-chamber and fan-chamber. Over these openings (1 the fan 0 is placed, and suitable valves 0 may be provided for regulating their area. Any air drawn from the dust-chamber through the openings aiiafter passing through the fan, isdischarged into space.
  • Brushes O and P mounted on endless chains or bands 0' and P, may'also be arranged, respectively, to travel under-and act upon the main sieve t for cleaning its meshes and for removing any dust accumulating on the floor of the dust-chamber and depositing it through one or more openings n onto the troughs at the end of the machine or onto the second sieve K at the tail of the machine.
  • the action of the machine is as follows: The material to be operated upon is admitted to the feed-roller and hopper H through the spout G. From the roller II it is allowed to fall onto the head of the main reciprocating sieve 11 and to gravitate to the tail of the machine. In so doing it passes over the reticulated covering of the main sieve.
  • any portion of the material that passes through the meshes of the main sieve falls into trough b, and is conveyed by the Archimedean screw B to the rolls; while by causing a current of air to be drawn by the fan 0 through the main sieve and material passing over it the bran, dust, and other extraneous material are carried up with the air-current between the interstices of the grid J into the compartments of the chamber a the dust-laden air fall into the troughs j (which prevent it returning to the main sieve) on side trays I I and gravitate onto the second sieve K, where the troughs pass, as previously described, into worm-box Z for conveyance to the second purifier or where required, and the tailings pass into worm-box Z, the lighter particles passing, as already described, through the Venetian dust-catchers N, where the particles are again separated from the air prior to its entering the dust- The heavier particles of chamber and out into space through the fan, while the particles are deposited in the troughs,
  • a middlings-purifier the combination, with the framework, of a main sieve divided into sections and having side trays running parallel with its reticulated covering, said sieve being interposed between a dust-chamber and an Archimedean screw, asecond sieve lineal with the main sieve, but a little distance therefrom, a grid of troughs mounted above said sieves, arranged to reciprocate therewith and to deliver their contents onto said second sieve, means for reciprocating the same, an inclosing casing, and means for producing an upward air-current through the sieve and casing.
  • a reciprocating frame I mounted within the framework A, having a main sieve t divided into sections,
  • dust chamber a,and brushes O :and P;:sub-I 40 istantially asisetforth.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Description

(No Model.) 4 SheetsSheet 1.
. J. H. GOODALL.
MIDDLINGS PURIFIER.
Patented Oct. 18,1892.
(No Model.) 4 Sheets-Sheet 2.
J. H. GOODALL.
MIDDLINGS PURIFIER. No. 484,633. Patented Oct. 18, 1892.
4 SheetsSheet 3.
(No Model.)
J. H. GOODALL.
MIDDLINGS PURIPIER.
No. 484,638. Patented Oct. 18, 1892.
m a Gav 1 mm-H o un m: Norms versus cm, mum-mum, WASNINGYUN, n. c.
UNITED STATES PATENT OFFICE.
JOSHUA HAMILTON GOODA LIJ, OF OASTLEFORD, ENGLAND.
MIDDLINGS-PURIFIER.
.SPECIPICATION forming part of Letters Patent No. 484,633, dated October 18, 1892.
Application filed May 17. 1892. Serial No. 433,324. (No model.) Patented in England February 10, 1892, No. 2,575, and May 2,
To all whom it may concern:
Be it known that I, JOSHUA HAMILTON GOODALL, a subject of the Queen of Great Britain,'residing at Gastleford, in the county of York, England,have invented new and useful Improvements in MiddlingsPurifiers, (for which I have filed a provisional specification in England on the 10th day ofFebruary, 1892, No. 2,575, and on the 2d day of May, 1892, No. 8,225,) of which the following is aspecificatio'n.
My invention relates to improvements in middlings-purifiers in which a horizontal reciprocating sieve operates in conjunction with a grid of catch-trays and an arrangement of dust-catchers for more thoroughly purifying middlings, semolina, and the like.
The object of my improvements are, first, to provide a grid of catch trays or troughs above the horizontal reciprocating sieve; sec 0nd, to afford facilities for separating the loose or small particles from the dust-laden air and depositing the settlings onto the catch-trays, and, third, to reduce the amount of material passing to the offal-sack by means of a second sieve arranged at the tail of the horizontal sieve. I attain these objects by mechanism illustrated in the accompanying drawings, in which Figure 1 is a sideelevation of the machine; Fig. 2, an end elevation of the head of the machine; Fig. 3, an end elevation of the tail of the machine; Fig. 4, a longitudinal section of the entire machine on line .1: at, Fig. 2; Fig. 5,
a transverse section on line 20 '10, Fig. 4; Fig. 6, an enlarged view in section of the horizontal sieves and catch-trays; Fig. 7, an enlarged transverse section of the same on line y y, Fig. 8; Fig. 8, an enlarged plan of the same; Fig. 9, an enlarged sectional elevation of a dustcatcher.
Similarletters refer to similar parts throughout the several views.
Ais the framework orcasing of the machine, which is of ordinary construction and divided into chambers in the usual manner; but it is made narrower than machines now in use; B, the Archimedean screw which works in the trough 1) near the base of the machine for conveying the throughs, the material which has passedthrough the sieves, to the rolls, and O,the exhaust-fan, which is preferably fixed 1n the .chambers cat the top of the machine. D and E are windows for the inspection, respective ly, of the dust-chamber o, and sieve-chamber a F F are frames provided with louvers for the admission of air below the sieve for purifying the material operated upon. G is a spout for the admission of the material to the feed-roller and hopper II. All the above-described parts and the means for imparting motion to the machine may be of ordinary construction.
In or about the center of the machine is a reciprocating frame I, made of iron or wood, arranged to fit between the sides of the framework A, and preferably to work at a slight inclination longitudinally-that is, from head to tail of the machineand provided with recessesi t' for the reception of frames 2' 2' covered with any suitable reticulated covering, such as silk,wire, or perforated glass, orparchment, which form and are hereinafter termed the main sieve.
Instead of making the sieve in one piece, as is usually done, extending from end to end of the machine, I divide it into any number of portions or sections. In the drawings I have shown the main sieve divided into three such portions or sections, and an opening a is provided in the framework at the head of the machine, whereby the portions or sections of the main sieve may be readily withdrawn whenever it is required to change the same.
Suspended above the main sieve, at a distance, say, about an inch, by rods j so as to reciprocate it, is a grid composed of a number of catch trays or troughs J to permit of the dust and other material arising from the main sieve being drawn up between them by the fan 0 and to prevent such material falling back again onto the main sieve 2' The troughs are arranged longitudinally over and parallel, or nearly so, or at a slight angle to the sieve to permit of the material gravitatin g to the tail end of the machine. The catchtrays J maybe made of metal-such as tin or any other suitable material, and may consist of any desired number of hollow single or double troughs, which are shaped somewhat like the letter S, the troughs extending roo K, to ,be hereinafter describede-that is to say, the troughs J are placed about six or eight inches from the head of the machineand ex tend over the second sieve K to, say, about one or two inches fromthe tail end. Each trough J is made of the shape shown at Fig. 'Zthat is,- the bottom or hollow portion j is semicircular about an-inch in diameter, and the upper or deflector lip portion j may be'aninverted semicircle of the same or slightly larger di-- ameter. The said troughs J are arranged parallel, or'nearly so, with each other at sum able distances apart-say about one elighth or! three-sixteenths of aninch-to permit of, the dust and other material arising from the sieve {i being drawnup between them, and in orderto prevent thesaid material from fall-l, .ing back onto-thesieve the upper rlip po rtion j of each trough is made to overhang the, next trough. V One-half of ,the lipsjjf, are ar-i ranged, tooverhang to the right hand and the other half, to the leftrhand, the centertro'ugh; beingiprovided witha lipjf on each side. L g
At the tail end of the, main sieve. i and n, line therewith is fixed ,inor onto the same, frame I a second short sieve K. fljhis sieye, is arranged at adistance from the sieve *fiof, say, about an inch orso to term a space 15 4 The sieve K isclothed with a reticulated co v ering .of. silk,.,wire, or perforated, glass or, parchment of the samewidth as the sieve 11 r and about, say, eight or ten inches in length; The sieve K is arranged to pass through the framework at thetail endof the machine and partments Z Z ,in which are mounted two small worms Z Z which are about, two, or three. inches in diameter, andiare arranged at right, Iangles, to the sieves 1? and wormsare, arranged to delivertheir contents at either Lend of the, box L, as may be determinedftliat is, worm .l? maydeliver itscontents to aspout communicating witha second purifier, whil-e .worm l idelivers, its ,,contents into the QfEaI- sack. Fhe small particles passingthrough .the'reticulated covering of the sieveKfall into .worm-box l,,aud thetailings frorn thesaine sieve fall into the other box L, Thesidesj oti the main sieve i are also provided wjth lgngi .tndirial troughsorrecesses I,' I' coniniunidat- V ingat the .tail end of} the mach ne with the second sieve Ktfor catching the loose, orsmla ll particles which are drawniby thetair from the .jtroilg-hs J. To. thesides of the machine-frame .work Almay also ,be fixed. inclined or other .'.pieces 1 I for" directing anyportion of, the material escaping fromthetronghs J into the side troughs 1'. Suitable stops, 1?, are also provided for preventing any materia l ,frbm .enteringintothe troughsJ or sidetrays lf 1 from the compartment a i n-which therol ler .is arranged, without previously passing onto the main sieve 11 The spacer? is for thepur- "pose of permittingvthe tailings from the main sieve]; to pass therefrom do wirthe, spout i tothe gravity-exhaust M, which is'p r vided at mwith any desired num ber of louver-boards to ,work over a box L, divided into twq poin for theadmission or a current of air, At the top of the exhaust M is provided a pipe m, which communicates with the chamber a above the main sieve 4? through the pipe m. The di st-Ia'den air is drawn by the fan into the chamber (1*, when the heavier particles will be deposited onto the troughs J, while the lighter dustwill be drawn into the Venetian dust-catchers N to be described.
The chamber a above the main sieve i is divided into any desired number of practically air-tight compartments by the partitions .a". Four of such compartments are shown in the drawings. In the first of these compartments is placed the fe d roller and hopper H, and to the roefi or division-board n of each of the other compartinen tgat'asuitable distancevabove the main -sieve this or' are fixed one er more Venetian dust-eatchersjN,'ari ranged n to comm'unicatewith'd'usfi-chamber a byrmeans of one'for rj oi'e openings in ,made in thedivision-bo'ard 61 5, ii roug' hj'which the exhaustcurrent; is' drawn for separating the .hseti r Pa t le ,t e i'bin and r i y g theatre-la e Jan. a m h, as; r bl prior to its entering the dust-cha n era". 'The'Venetjian deer-catchers N, 'may bein'ad of any sditablepetal, such a t n or the like. Each dushoatcher consists of any heater-numberof square, polygonal, or circular-tapering louverszor riugs t, hereinafter teimed conical? louvers. In Figs}, 5,"and 9 of the drawings I have shown four'si c'h loiuvers arranged one abo vethe other'at a fsui'table'fdistance apart say about three-fonrths of'an inchand attached to each other by 'auy' s'u itable ,mea s -su has, for instauce,'by"p'ie'ces of wire so l deredto them. In the center-of each of these conical leuvers' n, may,when re'quired, be fixed'aentral parallel tube n' +say'about ,tl r ee ipc hes in; d ainetep 'yfhen the largest diameter'ef the h parl uyers is, say; about twelve inches. 'Each'tube n isfiiiedtogthe ,under side of thel divisiomboard 21 which tfo r n sth e r oof ot'chamber'qfi'aiid the oor of the dustchamber a' i'rnmediatelyuinder an .Quenina at and i sfa 'r i dlt "p j theref r om in a down vvard di'reh't'ion to,"say, about one or more inches'fblow thetop of the we qon a were 'q i fi s laden air passing thrpugh'an bf the'sa'id conical louv ers to be'deliee ted into" the lowest lquvler before passing up the tribe 'nin'to the d i' -ch i llber 0,, thereby permitting the 'particles carried by said air being'deposited in a hog; 01 ,which is provided with one'or i'nore clack-valves n n ,"fii{ed to thelov'veistpart of returning said particles to the troughs J for conveying same to sieve 'K' a'ndworni Z.- In orderto prevent the air-cixrrent 'pgissiii hmo the conical louversn through "the min the two claclgs n nt areiso li ting, 'th'at 'a given weight of the particlesvvill leaanyepa one elael; at a time, while the exhau st keeps the ther-lone closed. Theopenings'n inaybe covered by suitable valves n whereby the the botiorn conical louver "for au'to uia'tioally area of the same may be regulated at pleasure. Openings are also formed in the division-board a (which forms the roof of chamber a and floor of chamber a) between the dust-chamber and fan-chamber. Over these openings (1 the fan 0 is placed, and suitable valves 0 may be provided for regulating their area. Any air drawn from the dust-chamber through the openings aiiafter passing through the fan, isdischarged into space. Brushes O and P, mounted on endless chains or bands 0' and P, may'also be arranged, respectively, to travel under-and act upon the main sieve t for cleaning its meshes and for removing any dust accumulating on the floor of the dust-chamber and depositing it through one or more openings n onto the troughs at the end of the machine or onto the second sieve K at the tail of the machine. I
- Motion for actuating the various. moving parts of the machine may be imparted to the main driving-shaft Q, carried in bearingq q,
fixed to the framework A from any convenient source through driving-pulley Q that is to say, the reciprocating motion is imparted to the main sieve byone or more cranks Q on the driving-shaft Q through connecting rod or rods Q While the Archimedean screw B, fan 0, feed-roller I-I, worms Z Hand brushes 0 and P are respectively actuated by bevel-gearing R, mounted on suitable shaft It, pulleys S S S S S S and belting S S S chain-wheels T T T T T T, and endless chains T T T.
Other parts of the machine not shown or described may be of ordinary construction.
The action of the machine is as follows: The material to be operated upon is admitted to the feed-roller and hopper H through the spout G. From the roller II it is allowed to fall onto the head of the main reciprocating sieve 11 and to gravitate to the tail of the machine. In so doing it passes over the reticulated covering of the main sieve. Any portion of the material that passes through the meshes of the main sieve falls into trough b, and is conveyed by the Archimedean screw B to the rolls; while by causing a current of air to be drawn by the fan 0 through the main sieve and material passing over it the bran, dust, and other extraneous material are carried up with the air-current between the interstices of the grid J into the compartments of the chamber a the dust-laden air fall into the troughs j (which prevent it returning to the main sieve) on side trays I I and gravitate onto the second sieve K, where the troughs pass, as previously described, into worm-box Z for conveyance to the second purifier or where required, and the tailings pass into worm-box Z, the lighter particles passing, as already described, through the Venetian dust-catchers N, where the particles are again separated from the air prior to its entering the dust- The heavier particles of chamber and out into space through the fan, while the particles are deposited in the troughs, as described. The tailings from the main sieve that'fall through opening c' be tween the sieves are again submitted to the action of another air-current in the gravityexhaust M before reaching the second purifier, and the dust and other matter separated therefrom are conveyed through pipe m to chamber a where it is acted on, as above described.
It will readily be understood that when desired the meshes of the sieves t and K may be .of the same or different sizes, and by submitting the material several times, as described, to the action of the air-currents all or nearly all'dust and deleterious" matter will be removed and better results obtained, besideswhich I am enabled to greatly reduce the speed of the fan.
I would have it understood that the various dimensions herein given 'may be varied as circumstances require; also, that I am aware that it has been proposed to construct a grid of adjustable trays and of spouts arranged for directing the dust-laden air to o'ne'side of the machine only. I therefore do not claim such a combination broadly; but
What I do claim as my invention, and desire to secure by Letters Patent, is
1. The combination, in a middlings-purifier, of an inclosing'casing, the main sieve having side'trays communicating with a second short sieve carried by the same framework as the main sieve, but at a distance therefrom, the superimposed grid of troughs, the Venetian dust-catchers, and means, substantially as described, for inducing the air-currents and actuating the moving parts of the machine.
2. The combination, with the feeding-roller and supply-trough, of an interposed reciprocating and divided main sieve having side trays, a second short sieve lineal with the main sieve, but at a little distance therefrom, a superimposed grid of troughs, means for reciprocatin g said sieves from the driving-shaft, an inclosing casing, and means for producing an upward air-current through the sieve and casing.
3. In a middlings-purifier, the combination, with the framework, of a main sieve divided into sections and having side trays running parallel with its reticulated covering, said sieve being interposed between a dust-chamber and an Archimedean screw, asecond sieve lineal with the main sieve, but a little distance therefrom, a grid of troughs mounted above said sieves, arranged to reciprocate therewith and to deliver their contents onto said second sieve, means for reciprocating the same, an inclosing casing, and means for producing an upward air-current through the sieve and casing.
4:. In a middlings-purifier, a reciprocating frame I, mounted within the framework A, having a main sieve t divided into sections,
and a short sieve K, mountedthereon, as de "scribed,'in combination with side itrays'l" I,
a grid of'troughs J, as described, suspended.
on rods j ebove main sievelfor =delivering 5 their eonteu'ts onto said second: sieve,'an 1in-= clUsingeasiugPand means for aprodueing :anf
upward air-cu rren'ti thro ugh the sieve andcreasin'g,=- all-' substantialllyi asset forth. i 5. In'e m-iddlings+pu rifier, "a r reciprocating IO fmmed; interposed on f remework A between an Archimedean screw B and a. dustechamber a, a. main sieve tidivided .inte kse'etionsa:
secnndsiereK; mou ntedi in frame :I;side trays 1' I, a grid ef troughs J, substantially-as des r 5 :seribed' andvenetiau diust catchers Nyanmed; with 'claek-bexes 7L said1dust -eatehers'.cen1-' mnl uicati rxg wvit-h the dust-hamber a by a: tube n; means for reciprocatingwsaid sievesg 1 an i'n'closing 'easin g; and means tor; producing: an upward air-current throughitiheisieve and ca'sing; allsubstantidlly as+setfort-h.
6. In aflmi'ddling s-puri fier; thercombinabion: "of hsievesiien d K; mounted int t hesajme: re-= 'rcjprocati ng frame I ate; small distanceaparh? said fra'meiLbeing i interposed ibetween l. the dust-ehamiber a and Arehimedeamserew B 011 framework A,: side trays :I ll thengrid of: troughs J,' as described; forudirecting the air-j current i to both sides of the machine at the: same time,'chamber' a g-dividedr into :compart-1 mentsyvenetiam dust catehers: N; provided with elabk-boxes ni dustfohalirber a,'divi-ded5 loox L, wor1ns Z Z fem Quandvchaimber a; an substantiallyas set forth.
* 7. Thec0mbination ofsieves E amid-K; frame 1, troughs Jyconical louvers m; tube nZ-clack-a boXesmF;claeksm 'nfl'divisi (ill-b03111 n, hav- "ing'opeuingsnfi'communicatingwith tube n,
8. In! a middlings-purifier, theeombination of -sievesi l andIii-mounted -in rthersammm- -ciprocatingaf-rame Petra smalb distance, apart, -said sframe'I rbeing interposed .-between "the dust-chamber azandArehimedearr serewrB on frame-work :A, side trays 51 111,, the grid 0f "troughs zLrasdescribed; for: rlirectiqg! the-air- :sameitime; chamber a3; divided intoxcompartmentwVen-etian dust-catchers N,: ar-m,edvwith uelaek-boxes m2; dustrehambenaf dividedr box L, worms 1 1?, ffan 'C; elm-ambena spout- 11, tailings rgnavitating r;exhaa1st lVI,-.aud ibrushes O 5:afld 1 ,-fll1 substanti-ally'zasrspecified.
1 9. 'Thenombination, in-a middliugsmurifier, 10f dram-ework A havin-g :WiIldOWS D ,and E and 'lOHVGI'r-fI'HI'DGS' FF, Archimedeanserew B, trough t b, chambers 11: a 1 (1, fan; (,1, spout' G, 5 feed roller and hopper, Hy frame! Li havi-ugre cesses i i, mai sieve 4?, divided iutdseetions, 1 --sidetnaysl I spoutmiitroughs Jgsieve K,
? box L, worms 1% i tailingslgra/vi tlyr exhaust M,
JOSHUA HAMILTON: GOODALL.
:Witnesses:
FAr-RBURN-Hmm, .ADAM O.= HART.
dust=chamber a,and brushes O :and P;:sub-I 40 istantially asisetforth.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU660191B2 (en) * 1991-10-17 1995-06-15 Texas Instruments Deutschland Gmbh Method of reading the data stored in a passive responder by means of an interrogation device comprising a receiving section

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU660191B2 (en) * 1991-10-17 1995-06-15 Texas Instruments Deutschland Gmbh Method of reading the data stored in a passive responder by means of an interrogation device comprising a receiving section

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