US1769461A - Mechanism for sampling materials - Google Patents

Description

C. F. RHODES MECHANISM FOR SAMPLING MATERIALS July 1, 1930.

Filed July 27, 1929 2 Sheets-Sheet 1 ATTORNEY! E QN July 1, 1930. c. F. RHOD ES 1,769,451

MECHANISM FOR SAMPLING MATERIALS Filed July 27, 1929 2 Sheets-Sheet 2 INVENTOR.

W MW

ATTORNEYS,

Patented July 1,1930 e VUN ITEDSTAT SZ cnARLEs arrows, on eLnNsFALLs, YoRK, fnssrenoit 'ro w mmsu PAPER COMPANY, 01? new YORK, 1v. Y., A oonronn'rron or new YORK!" mncnmrsM-Fon SAMPLING'MATERIALS Application file d July 27,

I: relates to-what are knoWn as-automatic samplers for taking at. periodic intervals,iuniform quantities orsamples of substancesor materials, which samples on being mixed together will give an: average of the quality and condition of the material as it existed during the sampling period.

.The invention has; reference more particularly to an automatic sampler for use in connection .with liquids containing a matter in suspension,- such for instance asthe socalled white water, whichflowsi'from the paper making machines usuallythrough a weir or conduit,;an'd which usually holdsin suspension such constituents as clay, pulp fiber, and-other ingredients, it being desirable ,for the proper and economic operation of the paper making machine, that the attendant-be kept informed as to the nature and amount of the constituents that are passing away from the machinev in the white. water, to the endthat the proper stepsmay be taken in the preparation and handling ofthe stock, and in the adjustment and oper'ationof the machine to preventundue waste. .In an applicationior Letters Patent of the, United, States filedby me on August l0th, -l 928, Serialf No. 298,823, a sampling mechanism for thispurpose is disclosed in which a sampling dipper is constantly revolved by a. power operated driving member and j at relatively slow speed in such manner as to dip down into the material to be sampled, and'then rise therefrom. so as to elevate the samplesand discharge the same into a suitable receptaclepwherein they are mixeditogether'to be lateranalyzed.

In the use. ofsuch apparatus. for sampling liqui-dsj containingmatter in suspension, such? as the white water flowing I from paper making machines, it; has been found thatthe passage of the sampling dipper through the white water at such speed as was contemplatedby the nrechanism disclosed in said application, would; give an opportunity for the fibers and other matters tosettle in the dipper to anundue extent, with the result that, the samples taken would contain a greater proportionof solid matter 1929. Serial .No; 381,418;

than would b-contained ';iii the body white water being sampled, and the mixed sampleswould not .representfas true and accurate an average of the suspended matters "as'wouldbe'desirable. 1 Y i "The present? invention is an improvement over that of said, application, and hasifor its object to obtain .a more representative 7 and "accurate: sample of the liquid material with respect to the proportions of the suspended constituents containedtherein, and the invention consists in an improved-zip paratus in which the dipper is accelerated at that partof its revolution where it is iin-- mersed in the waterto be sampled,with the result that-the motion of the dipper through the water will hey at such speed as to prevent the matters held'in suspension in the liquidfrom accumulating in the dipper to an undue extent, sothat the individual samples will represent more accurately and truly the proportions of solid constituents contained in the liquidat the moment thesamples are taken. v f

In the specification. to follow, the improved mechanism will be described in detail and the novel features thereof. will be pointed out in the appended claims.

a In the drawings :Fig. 1 is a plan view of the improved apparatus; I v

Fig. 2 is a side elevation of the same, and Fig. 3 is an end elevation looking from the right of Figs. 1;and.2.

. Referring-to the drawings: 4

The;machine comprises as its chief elements, a driving member 1 adapted in the present instance to be operated by the flow of the liquid material to be sampled, such for instance as the white water from a paper making machine; aisampling member or dipper 2 movable down into the flowing water to .takea sample thereof, and then upwardly toelevate the same so that the successive samples may bemixedtogether; and suitable transmitting connections 3 between the. driving member and dipper to impart to the latter its periodic movements and to accelerateithe speed of the dipper in its passage through the water. .These parts are mounted in and sustained by a suitable rect'angular open frame 4 consisting of longitudinal side frame bars 5 and transverse end connecting frame bars 6. 1

The. driving "member 1 is in the present instant? inane ni'of arswatergwheel re- 1 videdwitlipaddles"7, which wheel is xed said shaftto risefhsf-the worm remade 'to a horizontal transverse driving-shaftS e rotatablyamounted in bearing'sron the side the partsbeing ate thawhen the frame is set in position'xover fihQmCOIldilitj01""2W811ij' through which; the white; water flows from c the paper making 'ihachine, the water time? teraiztte rorm constructioii of wheel will be at its; lower side a 'flowing wa'ter tobe ei ten d;eiid isfjournalledina bearingopenrial-le at its ends inouterand 'inner standards 17'-'"a'nd SeXten'ding upwardlyfrom the" siaefiam'etersa-ht 'a' point adjacent the worm wheel, the longitudinal frame .barat that side ef -the machinefhas fiii dto it a standard; formed with guiding. slot 20 cii rv e d 'in a jarcfs'truckfrorn theaxis of the.

shaft 8 asacenter, in whiclislot is' guideda" pin 21 projectin laterally from a sleeve 22 :1 lebselyi 'siirfoiind in gi the transnii tting shaft H 11, which sleeve is confined on th'eshaf-t by in'eains ofgtwo"collars 23' pinned tolthe shaft. A tension sprmgea is connected at; its upper end to the sleeve 23 andatiits lower 'end'to the longitudinal l-frame" tat, and te'nds j to draw j'the'f transmitting shaft do'wn'w' ardly and a thereb ama th l wo'rinin I mesh with thewonm wheehfwhile permitting the,

wheel is its eccentric xis.

11311;, tithe c nstruction-described, be unde'r stoodthat due to the y'eccentr ie meii'iiting offthe worm wheel, the tota i 'tidir thereo f will beimparted 'tothe driven shaft? 16 ht variable speed,jfr om 'a'maximumspeetiavhenthe werm nearest the axis of the worm wheel; to a minimum speed when the iwcrm isati'tsggteatest distance from; the

\viirma whee1,?" othat are certainperiod inltheirotatiomfofthe worm wheel, I the "mo- *on a transverse 'driv en shaft 16 our tion of the driving shaft 16 is accelerated the purpose of which will resently appear.

The driven shaft 16 has xed to it a collar 25 provided with a hole in which extends a rod 26 held fixedly in place in the collar by a set pin 27,;which; rod extends'jat right angles to'the shaft and "constitutes a carrier for the dipper 2, before referred to, and

,which carrier, in the rotation of theshaft,

Will be revolved in a the axis thereof; I The ;dipperis in the present lnstance in the form of a' cup provided near its openend andzat diametrically opposite points, with alinedbearing holes whichloosely receive a lateral journal, arm 28 on'the end of the rod 26;"where bythe cup issupported by its car rier so 3 that "it may rock relatively thereto about an axis parallel tothe drivenshaftlfi,

collars 29 being fixed tothe journal armat V opposite sides of the cup to confine the same thereon. In the revolution of the cup by the rotation "of the driven shaft, it 'will by gravity assume an uprlght recelvlng posi ct tion, and will be carried down'wardly'and immersedinto 'the stream-of white water flowingithrough the conduit beneath, and becoming filled with the white water, the cup will be elevated by the'continued movement of its carrier; 1 I '-Means are provided for causing the automatic discharge of 'the'contents of the cup whenelevated, so that successive samples of the water taken' from the stream in the successive cycles of operation of the cup, may Ice-mixed together. Toaccomp'lish this obvject,-the cup 'has -fixed to it at one side, "a

finger 30 in position to engage 'a'fixed stop arm 31 extending laterally inw-ardly f-rom a vertical rod 32 extending upwardly from the longitudinal frame bar; the "said stop armbeing arranged in'the path offmovement of the finger as-th'e cup is carried upwardly and reaches the highest I point of its travel. arm, the continued movement 'of thecup by its carrier 'Will cause the cup to rock onits journal on the carrier to discharging position,-as shown by' dotted lines in Fig. 2,

Wherebytlie contents of thecup willbe dis charged into'a trough'33 supported by theframe of'the machine,and" le'ading to a suitable receptacle or pail "34 at. the side of the frame.- As the cupfcontinneson its :Way,

' thefi-ngenwillbe disengaged from the stop arm, 1 whereupon the cup will right itself by gravity ready" to receive another "charge of water as'it 'is again lowered to the flowing Wate'i' 1 I The relation of-theicup to the eccentri c worm wheeland worm is such that the cup will be" at the low-est point "in its path oi revolution, when the worm is nearest to the axis otthe wheel, the result being'that the speed ef-revolution oftheicup will be accel- Whenthe finge'r engages the $1 01 its erated as the cup passes through the water, and with a flow of water of approximately 104 feet per minute, whichis a fair average of the flow from a paper making machine, the complete revolution of the cup will consume about eight minutes, and its immersed passage through the water will occupy about eight or ten seconds. With the cup passing through the water at this speed, it has been found that there will be little or no opportunity for the settlingrin the cup of the fiber or other matters held in suspension in the flowing water, hence the sampletaken at any one time will be representative with respect to the proportion of suspended matters in the body of water at the time the sample is taken. In this waythe mixed samples will present a true and accurate average of the condition of the white water flowing by during the sampling period.

While the inventionhas been described with particular reference to its employment in taking samples of the white water 'flowing from paper making machines, containing as it does matters held in suspension, it is not intended that the invention be limited to such use, as it is applicable as well for taking samples of other liquids con taining matter held in'suspension, for instance screen rejections, and the invention is applicable also for taking samples of other liquids in which solid matter is held in suspension.

In the use of. the sampling machine in connection with paper making machines, it is perhaps preferable to operate the driving member or water wheel by the fiowof the liquid to be sampled, so that these samples will be taken in frequency, dependent upon the rate of said flow. But good results can be obtained by operating the driving member by means independent of the liquid being sampled, in which case the water wheel may be supported free of said liquid, and may be operated by a Water jet impinging upon the wheel, or, by other independent operating means.

I do not claim broadly herein the movement of the sampling dipper through the liquid to be sampled at such speed as tOprevent the undue settling of the suspended matter, as this is claimed both as to the method of operation and the apparatus, in broad terms in my co-pending application filed August 2nd, 1929, Serial No. 383,076. The present application is limited to mechanism by which the dipper is accelerated in its movement in such manner that for a portion of its movement it will advance at a given speed, and at another portion, that where it passes through the liquid, the motion is accelerated so as to be rapid. The present application is therefore limited to a specific means for accomplishing the result 'clainiedbroadlyin my-rsaid copending 'apT- plicationabove referred to. 1 T; Inlthe foregoing description and accompanying drawings, the 1 invention has been set forth in the particular detailedform and-arrangement of the parts which in practiceshave' been found to answer toa satisfactory degree the ends tobe'attained: It will be understood however, thatthese details may be variously changed and: modified by the skilled mechanic without departing from the limits 7 of the invention, and

I further, it will be understood that the in of the same, and movable from the material to elevate said samples, and connecting gearing between said driving member and dipper to accelerate the motion of the dipper when passing through the material.

2. In a sampler for materials, the combination of a driving member,'a revoluble dipper movable at one part of its revolution through the material to take samples of the same, and connecting gearing between the driving member and dipper to accelerate the motion of the dipper when passing through said material.

3. In a sampler for materials, the combination of a rotary driving member, a rotary driven member, a sampling dipper revolved by said driven member to pass through the material to take samples thereof, and means for accelerating the motion of the driven member at a given point in its rotation.

4. In a sampler for materials, the combination of a rotarydriving member, an eccentrically mounted gear wheel, a power transmitting shaft geared to the driving member and to the gear wheel to move the latter with accelerated motion at a iven point in its rotation, and a sampling dipper operatively connected with the eccentric gear wheel to be rotated thereby.

5. In a sampler for materials, the combination of a rotary driving member, an eccentrically mounted worm wheel, a power transmitting shaft geared to the driving member, a worm on said shaft in mesh with the worm wheel, :said shaft being movable to and from the axis of the worm wheel to maintain the worm in mesh with the worm wheel, and a sampling dipper operatively shaft journalled in the iframe, a worm wheel mounted eccentricallyon Isaid shaft, 9; longi- V itudinailyyextending 11p and down movable :poweritransmitting shaft geared to said driving 'membema; worm on said shaftin.

mesh'with theworm wheel, a: spring acting w I -pn the power transmitting shaft to maintain

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