US678551A - Ore sizer and classifier. - Google Patents

Description

No. 678,55l. Patented luly I6, l90l. J. U. DIMMICK. ORE SIZER AND CLASSIFIEB.

(Application led July 9, 1900.) (No Modal.)

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FFllCEt JOSEPH O. DIMMIOK, OF DENVER, COLORADO, ASSIGNOR TO THEDIMMIOK OONOENTRATING COMPANY, OF SAME PLACE.

@RE SIZER AND CLASSIFIER:

sPEciFI'cATIoN forming part of Letters :Patent No. 678,551, dated July 1e, i901.

Application nea muy e, 1900.

To all whom t may concern,.-

Be it known that l, JOSEPH O. DIMMIOK, a citizen of the Unit-ed States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented a new and useful Skimming Device for Ore Sizers and Classiiiers, of which the following is a specification.

This invention relates to that class of oreseparators in which the pulverized ore is classified through the agency of water-such, for instance, as shown in my prior patent, No. 653,568, granted July 10, 1900.

The object of myinvention is to provide a skimming device for carrying off the slimes which accumulate upon the surface of the water in sizers and classifiers of the type referred to.

The invention will be more fully described hereinafter with reference to the accompanying drawings, in which the same is illustrated as embraced in a convenient and practical form, and in which- Figure l is a longitudinal vertical sectional view showing my device as applied to a sizer and classifier. Fig. 2 is a plan view of my device removed from the sizerand classifier, and Fig. 3 is a vertical sectional view thereof.

Similar reference characters indicate the same parts in the several figures of the drawings.

The sizer and classifier with which my present invention is illustrated in Fig. l is fully shown and described in myprior patent previously referred to and will therefore be only briefly described here in order that the operation of my improved skimming device may be understood.

A tank,preferably V-shaped in cross-section, is provided with a trough N or other suitable inlet,through which the pulp from the stamps or pulverizer is delivered. Across the center of the tank isk located a partition G, near the bottom of which is an opening provided with avertically-sliding gate. The size of the opening may be regulated by sliding the gate up or down by means of a rod extending from the gate to a point above the tank. At approximately the center of the gate is inserted a tubular coupling or nipple having a valve J located therein.. A rod H2 is operatively connected to the valve J and extends up- Serial No. 23,035i (No model.)

` Wardly above the top of the tank, permitting ready adjustment of the opening through the coupling. A iiexible pipe K, slightly longer than the distance from the gate to the end 5 5 wall` of the tank to admit of the free adjustment of the gate, extends from the coupling in the gate to a nipple projecting through the end Wall of the tank. A valve L is provided in the nipple on the outside of the tank. A 6o series of transverse partitions divide the bottom of the tank into a number of chairnbersM, each of which is provided with a dischargeoutlet M2, passing through one of the side walls of the tank, near the bottom thereof. These partitions are preferably of a height substantially equal to the portion ofI the center partition below the opening therein. The

end of the tank is provided with an overflowspout N2. 7o

Reference letters A indicate vertical posts forming part of the framework for supporting the tank.

My present invention comprises an attachment for conveying the slimes from the surface of the water to the exterior of the tank, where they may be delivered to a table orconcentrating device. In the form of my invention illustrated I provide a skimmer which nfloats upon the surface of the water and which 8o is provided with a central opening below the Water-level. A iiexible pipe leads from such central opening to the exterior of the tank, which in the sizer and classifier shown in Fig.

l may be accomplished by connecting the pipe with the coupling or nipple which passes through the adjustable gate in the central transverse partition G.

The details of the skimming-disk are best illustrated in Figs. 2 and 3, in which O indicates a rim projecting upwardly from a bottom C5, which is preferably concave. Holes O2 are provided in the rim vC at suitable intervals, and an opening C3 is formed in the center of the bottom C5. A nipple C4 pro- 95 jects downwardly from the opening C3, to which is coupled one end of a flexible pipe D, the other end of which leads to the exterior of the tank, or, as shown in Fig. l, to

the nipple extending through the adjustable ma gate.

A table or support E, having legs E2, is

preferably though not necessarily placed upon the bottom C5 of the skimmer over the opening C3. The table E is adapted to support a weight F, which is of such size as to submerge the openings C3 below the waterline, (indicated by letter Bin Fig. 1.) The table is preferably open at the top to permit weights being added or removed to give the exact weight required.

The operation of my invention is as follows The pulp is discharged into the tank, and the slimes,which are too light to be drawn down by the downward current, accumulate upon the surface of the water. These floating slimes then pass through the openings in the rim of the skimmer, and thence through the opening inthe bottom of the skimmer to the pipe, from which they are discharged to a separate table or concentrating device. The volume which may be drawn off through the skimmer may be regulated by varying the weight F, so that the openings C2 will be more or less ysubmerged, or by plugging up some of the openings O2 to produce the desired amount of inflow. The conduit or pipe D being longer than the distance from the gate to the surface of the water allows the skimmer to adjust itself upon the surface of the water to any point to which the current may carry it. The slimes and skimming device being controlled by the same influence will always be at the same'point upon the surface of the water.

Although I have illustrated my present invention as applied to the siz'er or classifier covered by my prior patent, itis equally applicable to other ore sizers and classiers of the washer type. I do not wish to be understood as limiting myinvention to the more or less precise froms and details described, as I contemplate changes in form, the proportion of parts, and the substitution of equivalents as circumstances may suggest or render expedient Without departing from the spirit of my invention.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In combination with an ore-classifier, a skim ming-disk adapted to oat, and comprisof the skimmer may be governed, substantially as described.

2. In combination with an ore-classifier comprising a tank divided into chambers by a partition, a gate in said partition, a iexible conduit passing through said gate and one of the end walls of the classifier, and connected yat its other end to a skimmer in the first chamber, said skimmer comprising a bottom, perforated rim, and a table supported by legs over the central exit and adapted to receive weights to regulatethe submergence of said skimmer, substantially asdescribed.

3. In an ore-classifier, the combination with a skimming device, adapted to oat, comprising a bottom having an outlet-opening therein, and an upwardly-projecting rim surrounding the bottom, and haviuginlet perforations therethrough, of means for adjusting the weight of said skimming device whereby its submergence may be governed, and the position of said inlet perforations relative vto the water-line Vso adjusted that the desired volume of liquid may be drawn olf through the skimming device, substantially as described..

4:. In an ore-classier the combination with a tank having outlets, ot' a floating skimming device, means for adjusting the Weight of said skimming device, a conduit leading from said device to the exterior of the tank, whereby the heavier particles of ore pass through the said outlets in the tank, while the slimes which accumulate on the surface of the Water are drawn off through the conduit leading from the skimming device, the volume of such slimes drawn off being determined by the degree of submergence of the skimming device, substantially as described.

JOSEPH O. DIMMICK.

W'itnesses ORvILLE L. DINEs, HELEN E. KENNEDY.

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