US1591092A - Sampling apparatus - Google Patents

Description

July 6, 1926.

A. G; M GREGQR Y SAMPLING APPARATUS Filed A ril 19, 1924 6 sheets-Shoot 1 Y July 6, 1926,

A. G. MCGREGOR SAMPLING APPARATUS Filed April 19, 1924 6 sheets-sheet 2 July 6 1926.

. A. -(3. MGREGOR smmme APFARATUS Filed April 19, 19 24 6 Sheets-Sheet 5 July 6 A. G. MCGREGOR SAMPLING APPARATUS Filed April 19, 1924 I 6 Sheets-Sheet 5 Inue niar:

July 6, 1926.

A. G. M GREGOR SAMPLING APPARATUS Filed April 19, 1 924 6 Sheets$heet 4 A. G. M GREGOR SAMPLING APPARATUS Filed April 19; 1924 'July .6

6 Sheets-Sheet 6 Z Zr WM 2 a Patented July 6, 192%.

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" f SAMPLING Animat "'A pneation filed April 19, 1924. Serial 1%. 707,628. i

= 'This invention relates to an apparatus or machine for sampling ores, or the like,

which will work more conveniently "and-to -better advantage than the sampling ma? chines. at present in use, in ore mills,

In an ordinary ore sampling mill, such as are now generally in use, a; ten or twenty per cent sample of the coarse ore del vered to the mill is taken at the top of the mill I" 10 in some such sampler as the Brunton, V'ez in, 'Snidertetcx llhe ore is'crushedfin a sub sequent crushing; machine: and vanother sample'isjtaken of the ore discharged from the crushing machine. gA second samplefl is further c'rushed by asecond'crushing ma; chine. Athirdfsample is takenof the ore discharged from the latter machine, and this. is delivered to athi'rd crushing fnaf. chine A [sample is taken of the product 2 from the third crushing machine and is usually: delivered to a sample safe or hopper.

In sucha 'mill each sampler cuts anfapproximately definite percentage of the material fed to it, and no-change can be made. 0

without installing a diflt'erent'sampler,which is not practical in ordinary mill operation, I and is not resorted to. 4 3O vSuclrsamplers asthose suggested have 7 sampler for collectingthe sample. In order to get an accurate sample itis necessary.

that the sampler collect a uniform section through the stream of ore flowingto it, and r this requires that the'slots or openings in the 'sampler be large enough so thatfthc coarsest material coming-to v it will not be" prevented from passing through-and so that i aflproperfamount of coarsematerial wilL pass intothe sampler; In usual practice the width of the sample opening must be several times the diameter of the coarsest-ore fed,

to it; As the diameter of the usualsamp ler width of the opening amounts to usually.

scribed by the sample slot.

the sample finer before taking the next sample, and with large amounts of ore pe lot, and with this large proportion of sample} reat amount of crushing is wiredn t e sampling mill: H

in vthepercentage taken by the sampler slots or openings in the periphery of the *of the type suggested is not greaterthan; about 60 inches, it results that, in orderto get aproper opninglfor coarse ore, the

about ten per cent of thecircumference de-* Oftent mesit is twenty per cent. It is necessary to -crusu W fQftentimes' in" order to cut" down the amount-0f crushlng in thesampling mill, the sample Jopen ng 1S made'narrower than it should be for accurate resultsfand 'for getting p p P QP f OD of coarse ore. the coarse-ore willnot a alyig Very often the same'as' the fine. In an ordinary-Sam; pling 111111 the several sampler'sfre'qui thei 1" belts and pulleys on'eachfloor; The present own drives which increases-the number of mechanical ore samplers in use, suchfas" those mentioned, Wll'lnot-operateon stic y f ores, sueh as"fiotationfconcentrates.

the percentage-of sample to' be varied. from t1me to time. large lot szof 'o'res'it' is not necessaryto cut as big a percentage on small lots. Another object 'is-lto get small percentage] sample -ofcoarse ore and yet have sufficient width ofbucket in order.

o g an fl Q s mplei' I accomplish .j e1P rP "Of "my. nve o i to en l 7 this having a sample' bucket with a" (50111 l l p r i y Wid pen top, andwvhich is;

icaused to travel on a much larger circle than inbe fore referred to.

is common in samplers of the types here-,

A further objectis to cut samples on the various floors of a sampling Inill'WitlTa self-contained machine hav ng only one driv' In the accompanying drawings 'Fig, .1 is.

an endwise elevation of a sampling mill having several floors fitted with a preferred form ofsampling and reducing apparatus.-

I l I Fig. 1s "a sidewise 'elevatioIl.,,Q-fJthe same, show ng the sampling andyreducing ap paifatus in duplicate. Figs. .3, 4, 5,. 6 and;

7 are detail views of-sampling buckets, their carrying 'armsland attached parts. Figs isa detail plan v1ew, and F ig.'9 a detail elevation of "the lbujcket turning cam ridgei, ,Fig. 10 1s a diagrammat c view illustrating l the turning movement of a sampling bucket,

Figs. '11 and 12 are enlarged detail views j of the Jaeger' samplershownfin Figs. land 2.

Referring to the drawings, 12 denotes a dumping miXer and the Vezin vertical shaft having a stepped hearing .at i 13 at its lower end and havingsuitable bear-:-

ings in theseveral floors ofjth'e mill. The 'shaft 12 is driven from amotor .14, they motor shaft carrying a. bevel pinionflfi nected with the shaft 13 and I protected by a safety housing 17.; V

'lim 1 meshingwith a b'cvehgear 16 rigidly con- 1 V the preferred-farm t fitheinventienil mi rie's several sets of arms 18 to each of which isattached, preferably by a knuckle joint pivot 19, 3a rotatably mounted sampling bucket 20 each sampling bucket being connected with a sleeve 21' mounted ona jouring it from its supporting attachment to an nal rod 22' preferably formed integral with a yoke 23 forming part of the knuckle joint 7 pivot.19. The yoke 23 has, integral therewith, an inwardly extending arm 2a through theinner end 2480f which passes a locking -pin 2-5 having a bent-over end part 25Tarranged to enter a recess in the outer face 1 of a lug 26011 the arm 18, so as tohold the said arm in working posit on; but when it i's'desired to throw .abucket out or working position thelocking pin 25, passing through i a sleeve'27 on said arnninay, by'a proper manipulation of a handled locking nut 28,

be loosened and withdrawn so that the pive .otally fmountedbucket may be displaced from or moved out of working 1.1. 1 1 :1 shown in dot-Led nnes in'r o.

Each bucket 1201s prov ded 7 roll 29 arranged tofengage a curved cam position, as

ridge 30 mounted-on a sample hopper 3 1,

81* and 31P,, so that asthe shaft rot-ates,

carrying the buckets 20 around with it, each bucket, when it arrives over a sample hopper, will by engagement or the cam roll 29' with theisaid cam ridge 30, be turnedupside down'so as to empty its conten ts Inf/O a H 1 V buckets 1s dumped into the hopper 31 and sample hopper.

To insure a proper discharge of the sa m )les" from the sam )ling buckets 1 arare each furnished with abayonet-shaped scraper or cutter 32, the inner portion or the shank 32 of said scraper or cutter being, approximately at a right, angle to the body 32. The shank 32 is'secured'by an attaching screw 33ftoa journal rod 22, on which a sleeve 21, rigidly connected withai same pling ,1 bucket 20, is mounted for turning movements, and with which 'JOHIHZLl rod the scraper or cutter- 32, 32 is rigidly connected,

so that as the sampling bucket is turned upside down to discharge-its contents the said scraper or cutter will remain stationary and" Will thus assist in clearing the'said bucket of its contents. J V I I V The ore to; be sampledis discharged ironr a conveyor 84: into a hopper or chute 35 at the top of the mill and beneath which hopper or chute the sampling buckets 20 are carried tit-intervals. In the form ofthe invention herein illustrated there are Jourmaterial bein dischar ed from the ho er percentage ofsample material from the or "chute I If, however it be desired to take afless'er with cam,

sampling buckets of each set were in opera tion one ormore or said sampling buckets may be thrown out of operation by loose-narnr 18,- and displacing it from Working position, as indicated by dotted lines in hat portion of the stream otmaterial being discharged from the chute orhopper. 35cwlnch1s not carr ed away bytheisampling buckets 20, falls into' a [reject recep tacleor chute 38. from which it may be .dis-

chargedito conveyor 37 and be carried away to any suitable place of deposit; The

ore sample which has been segregated from 7 the stream, or massof ma'terial discharged from the hopper 35 and dumped into the hopper 81 by the sampling buckets is ,;con

veyed by suitable means, as bya chuteSS to a crushing mill 38 which may; behdriven from a motor 39, and the, product from said mill passes into a hopper 22 beneathwhich the sampling buckets'of a .second'set pass at intervals,-cutting through the stream of iiaterial discharged from said hopper '22. Thereject materialnot beingtaken by this second set otsampling buckets passes down- I ward through a chute 40; while the sample material from this second set of sampling passes thence through achute ll to a roller crushing mill 42 for-further reduction, said crushing mill being driven froma motor .43. The products from the crushing mill 42 pass into a hopper 44: beneath which sam pling buckets of a third set pass atin- 'tervals, said sampling buckets dumping their contents into the hopperfil while-the. material discharged from the said hopper a l, not taken by said sampling buckets, passes into a reject hopper 45, and thence through a chute; 46 which discharges. onto erably be of the Jaeger typelsuchf shown:

in the Jaeger Patents Nos; 1,322.57?) and 1 414548, so that the sample materiahnow properly reduced, may be thoroughly mixed; The mixer is'arranged'toi dischargeinto a trough or chute 51 which in turn discharges into a'hopper 52 beneath which rotates a VeZin'sampler hopper 53 Vofvwell known form, said sampler taking any desired proportion of the material discharged from the 1 hopper 5 2and discharging it into a sample bucket or receptacleel The material from the hopper 52, not taken by the sampling hopper 58?, is discharged into a reject chute 'whence it passes into a chute" material passing'fromithe uppermost hop perq35 to thereceptacle 36 ,"as'also'the re- ,1. jected material from the hoppers 22 and- 56 discharging onto the reject conveyor.

-' From the foregoing it' will be apparent that the improved wsanfiplingapparatus provides means, by releasing-one or more-of the horizontally rotated open-topped sample buckets or receptacles and displacing it or them from working position, as indicated in dotted lines in Fig. 3, or otherwise,'bywhich the percentage of sample material taken from a stream of material being de-i livered maybe varied, as desired; and this feature of the-invention may of"course be utilized in connection' with a single set of horizontally rotating samphngbuckets or receptacles, as will be understood.

The Operation ofturningthe open-toppe sampling buckets or receptacles upside down for dumping" will be readilyunderstood from the diagrammatic view Figgl O, "which shows, in dotted lines,a sampling bucket in different progressive positionsas it is turned.

fordumping', and then restored to receiving position, by reason of the "contact ofthe cam roll 29 with the horizontally curved cam ridg'e'BO as the bucket carried around" horizontally.

Also'the featureof providing a dumping mixer for thoroughly mixing the sample ma terial which has beenproper-ly reduced, and.

thereby rendering'the same'practically homogeneous, may beused' in connectlon with .a single sampler, ora single set of sampling buckets or receptacles, as will be understood.

In the operation oithesampling appa-- ratus arranged, as SllOWIl lIl F1gs.;1and 2 in a sampling mill having several floors, and

in'which' the vertical shaft '12, having a s ngle drive, carries several sets of horizontal arms '18 at different levels, and which arms are each provided with an open-topped sampling bucket or receptacle 20, arranged V to be turned relativeto saidarms, the "upper set ofsam'pling buckets, as theyarerotated horizontally,1cut through the stream of ma- I 'terial delivered-from the hopper 35 to which hopper such material is+delivered "by the conve orsa, and the'sample material passing into said buckets or receptacles. is dumped into'the upper hopper 31 by virtue of the engagement of the cam'rolls 29 on the bucketsQO with acain" ridge 30 on the hopper The 'material from the hopper 31 is next delivered to the crushing. mill 38 through which it passes to a hopper 22 ofmaterial from hopper 44, and dump ing itinto the hopper31 The rejected 4L4, is carried away through the chutes-heref inbefore described.

ple material-is taken fronrthe'streami'of It willthus be undera stood that while a certain quantity of sain ing samplingbuckets, and" the sample materialibefore iit rea'ches the hopper 31 is again still further reduced bytjhe third or lowermost set of'sampling.buckets or-receptacles. Thus the quantityofsample materialfinally delivered to the hopper 31 is small in quantity relative to theamountof sample material taken by the uppermost set of sampling buckets. a 1

v As ore samplingoperations areat present,

practiced, the sample material collected in a sample safe orhopper sometimesamounts to'several: thousand pounds, and'the operat on of reducing thislarge'quantity of sam Siderableinaccuracy in the samples; -"By 'ple material down: to avsample of say fiity 7 pounds, by fc'oning. .or quartering, involves a great deal of'labor and there is often con-;

using ainixer asoles cribed the, sample'mate rial is rendered-practically homogeneous, as

above referred to, and by using a Vezin" sampler, as hereinbefore described, and which divides the reduced and: WelLmi'xed samplematerial into any desired'reduced.

quantity, much labor will be'avoided'and tofore. i e V t The invention is not to be understood as being limited to the-details herein sh'own rand more accurate results obtainedthan here described, as such "details may bevaried widely, within the province of mechanical skill, without departing fromthe essenceorscope of the invention-as the same isdefinedj by the claims hereunto appended. f N

: Having thus described myinventions ,1

claim and desire to'secure byLetters Patent L In a sampling apparatus, the .c ombina-.

tion with a horizontally rotating openetopped sample receptacle having :a curved bottom, and a verticalrotating shaft by, which, said receptaclefis carried, of means for turning. said receptacle' upside do nJfOrJ dumping,

and a cutter or scraper mounted withinsaid receptacle andstationary relativethereto, so:

as to assist in'clearing said receptacle when the latter is turned for dumping.

2. In a samplingapparatus, the conibination with avertical rotary shaft having a:

plurality of horizontal arms, sample receptacleseachhaving a pivotedconnecti'on with one of said arms,' releasable means forholding said-receptacles :rigdjd with said-arms, but

permittingv any desire hum-beret said reeepf tacles to be displaced from their working positions to vary the percentage of sample taken from a supply of" descending material, and means for turning said sample receptacles for, dumping.

3. In a sampling apparatus,the combina-' tion, with a vertical. rotary shaft having a plurality of horizontal arms, sample-re ceiving receptacles each havinga pivoted connection with one of said arms, releasable means for holding: said receptacle rigid with said arms, but permitting any desired number of said receptacles to be displaced from? their working position to vary the percentage of sample taken from a supply of descending material, a sample receiving i hopper, and means for emptying said receptacles asthey pass over saidhopper.

4. In a sampling apparatus,- the combination with sampling means, of a mixer into whichrthe segregated sample material isdischarged, so that said materialwill is thoroughly mixed and thus be rendered practically homogeneous o .7

511 11 a sampling apparatus, the combination with sampling. means, of a crushing mill through which the segregated sample is passedfand a mixer into which the crushed sample is discharged, so that said sample will be thoroughly mixed and, thus be rendered practically homogeneous V 6. In a sampling apparatus, tne'eombinationwith sampling means, of a crushing 7 be practically a true sample of the mixture.

tion with sampling means, of a crushing mill and a grinding mill through which the sample material is passed,a batch mixer into whi ch the crushed andground sample mill and al grindingmill through which the segregated sample material is passed, anda mixer-into which the'crushed and grounr'l sampl material is discharged, so that said sample material will be thoroughly ,mixed and thus be rendered pract cally homogenee ousr V 7. In a sampling plant having successive mechanical samplers'and crushing machines atdifi'erent levels, a sample safe or hop-V per containing the segregated sample cut from the lowermost crushing machine, in

combination with a mechanically operated batch mixer for receiving and mixing the accumulated contentsfrom' said sample safe orhopper.

8. In a sampling plantvhaving successive mechanical samplers and crushing machines at different levels, asample. safe or hopper containing: the sample cut from the lowesmost crushing machine, in combination with a mechanically operated batch mixer forreceiving' and thoroughly mixing; the accumulated contents from said sample safe or hopper, so that: each small quantity of the mixed material selected: at random will 9. In a sampling apparatus, the'combinamaterial is discharged, so that said materialwill be thoroughly mixed and thus be rendered practically homogeneous, and a dividing sampler for reducing the quantity of the mixed material 10. In a sampling mill, the combination with a vertical shaft; extending through several floors of said mill, and means for rotating said shaft, of a plurality of sets of horizontal arms fixed tosaid shaft at" differentlevels, sampling bucketsor receptacles carried by said arms, means for emptying said sampling buckets or receptacles' as they are rotated horizontally, a sample-' receiving hopper-beneath each set of samplingbuckets' or receptacles, a crushing mill through which the sample mater-ial from the upper sample-receiving hopper is passed, a grinding mill through which the crushed sampled material from the next lower sample-receiving hopper ispassed, anda dump ing batch mixer into: which crushed" and ground sample material from the lowermost sample-receiving hopper is discharged.

11. In a sampling mill, the combination.

with a vertical shaft, extending through several floors of said mill, and means for rotating saidfshaft, of a plurality of sets of horizontal arms fixed to saidv shaft at different levels, samplingabuckets or recep .tacles carried by said arms, means for emptying said sampling, bucketsor receptacles as they are "rotated horizontally, asamplereceiving hopper beneath each set of sampllng buckets or receptacles, a. crushing mill through which the samplematerial from the upper sample-receiving hopper is passed, a grinding .mill through which the crushed, sample material from the next lower samplereceiving hopper is passed, a dumping batch mixerinto which crushed and ground sans ple material from the lowermost sample receiving hopper is discharged, and means' for carrying away the rejected material from the points at which the several sets of sampling bucketsor receptacles-rut zontal arms fixed to said? shaft at different levels, sampling buckets or receptacles car ried by said arms, means for emptying'said sampling buckets as they are rotated horizontally, a sample rec-eiving hopper beneath each set of sampling bucket-s or receptacles,

a crushing mill through which the sample;

material from the upper sample-receiving hopper is passed, a grinding mill through which the crushed sample materialfrom the; second sample-receiving hopper is passed, a dumping mixer into "which crushed and. ground sample material from the lowermost sample-reoeiving hopper is discharged, and

' a dividing sampler for finally reducing the sampled material to a desired and relatively small quantity. V

13. In a sampling mill having several floors, the combinationwith a vertical shaft extending through several floors, a plurality of sets of horizontally rotating, open-topped dumping sampling buckets connected with said shaft at diflerent "levels, eo-operating 1o I means for diverting the material downward through the mill and feeding it to the differ- ALEXANDERGRANT MCGREGOR.

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