US1725765A - Horizontal and vertical riffle - Google Patents

Description

Aug. 27, 1929. REA

HORIZONTAL AND VERTICAL RIFFLE Filed Aug. 27, 1928 l'lilllllllllllllllll Rm WF .N R m w WW 6 My Patented Aug. 27, 1929.

. N ITED A -155 1,725,765 PATENT: OFFICE.

"l nrcnaanin nn, Lone 'inAc CALIFORNIA.

HoRI'zoNThuAiqn vEarIc L RIEFLE.

Appli cationfiletl-Augu st 27, '1928." Seria1=No. 302,255.

This invention relates to a rifle for the separation of metals from the pulp. or sand. An object of my invention is to provide a riflle, the bafles of which extend both vertically and horizontally and which is effective in recovering a maximum amount of the metals from the pulp, sand, or the like.

Another object is to provide a rifle which also acts as a classifier to prevent the large and heavy particles from mingling with the pulp containing the metal.

A further object is to so break up the flow of pulp by means of eddies therein so that the metals are prevented from flowing over the top of the pulp in a scum but are thrown downwardly and deposited on the floor of the rifle.

Other objects, advantages, and features of invention may appear from the accompanying drawing, the subjoined detailed description, and the appended claims.

In the drawing:

Fig. 1 is a. fragmentary side elevation of my rifle with parts broken away to show the interior. a

Fig. 2 is a fragmentary plan view of the same with the upper perforated plate broken away.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2.

Fig. 4 is a fragmentary perspective View of the upper perforated plate.

Fig. 5 is a fragmentary enlarged plan view of the perforated plate.

Fig. 6 is a fragmentary transverse sectional view of the same.

Fig. 7 is a view similar to Fig. 6 showing the depending lip at an angle.

Fig. 8 is a view similar to Fig. 6 showing the depending figure in another angle.

Referring more particularly to the drawln z The numeral 1 indicates a sluice box of any desired size and of usual construction. This sluice box is set at an angle so that the pulp travels therethrough by gravity, all of which is usual and well-known in the art. On the floor 2 of the sluice box I provide 7 horizontal rifles 3, the rifles extending transversely of the box. The rifle 3 may be constructed in a number of different ways, namely, they may be formed integral with the floor of the box by forming transverse grooves thereon, a separate metal plate may be provided having grooves thereon, or a coarse corduroy may be utilized. The corduroy may be either cloth, rubber, or some suitable composition material.

The rifle 3 extends the full width of the box and extends substantially the entire length thereof. A rifle tray 4 is provided in the box 1 over the rifle 3, said tray extending substantially the full width of the box and over the length thereof. The tray I is provided with a series of rows of holes 5 so that the pulp is permitted to pass downwardly through the tray. In cutting the holes 5 the lips 6 thus formed are downwardly bent, either at right angles to the tray, as shown in Figure 6, or at an angle rear-wardly or forwardly, as shown in Figures 7 and 8. These lips rest upon the rifle 3 and are passed tightly thereon so that no liquid can pass under the same.

The rows of holes 5 are placed in staggered relation to each other so that there is no free continuous passage from one end to the other under the tray 4. That is, the pulp, in passing through the sluice box must impinge upon the depending lips 6. The action of the rifle is such that as the pulp flows through the box, first downwardly through the openings 5, and then around the fingers or lips G, eddies are formed which tend to throw the metal held in suspension in the pulp,'downwa1'-dly so that it will be caught in the vertical rifle 3. The tray 4 may be formed of metal or any other material which is found desirable.

Having described my invention, I claim:

'1. In a sluice box, a vertical rifle in said box, a plate spaced-above said rifle, said plate having rows of openings therein, said rows being in staggered relation each to the other, and depending lips extending from the plate and resting on said rifle.

2. In a sluice box, a vertical rifle in said box, a plate spaced above said rifle, said plate having rows of openings therein, said rows being in staggered relation each to the other, and depending lips extending from the plate and resting on said rifle, said lips being formed by the sections cut out to form the openings in the plate.

3. In a sluice box, a rifle in the bottom of said sluice box, said rifle being formed with transversely extending grooves therein, a plate spaced above said rifle, said plate having openings cut therein, and lips bent downwardly from the plate and resting on the rifle.

4. In a sluice box, a rifle in the bottom having openings cuttherein, and lips bent downwardly from the plate and restin'g'on the rifile, said lips being. set .in rows and ad aCent rows being in staggered relation.

5. In a sluice box, a rifiiewin the bottom of said sluice box, said riflie being formed with transversely extending grooves therein, 10

said riflie being; removable from the sluice box and separate from the bottom thereof, a plate spaced above said riflle, said plate having openings cut therein, and lips downwardly bent from the plate and resting on the rifi'tle.

In testimony whereof, I ailix my signature.

RICHARD REA.

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