US1336327A

US1336327A - Concentrating-table

Info

Publication number: US1336327A
Application number: US41429A
Authority: US
Inventors: Wright Charles William
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-07-23
Filing date: 1915-07-23
Publication date: 1920-04-06
Anticipated expiration: 1937-04-06

Description

C. W. WRiGHT.

CONCENTRATING TABLE.

APPLICATION FILED JULY 23,1915.

1 336 321 Patented Apr. 6, 192 93 4 Z SHEETS-SHEET lmmsm C. W. WRIGHT.

CONCENTRATING TABLE. APPLICATION FILED JULY 23,1915.

Patented Apr. 6, 1920.

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CHARLES \VILLIAM WRIGHT, OF WASHINGTON, DISTRICT OF COLUMBIA.

CONCENTRATING-TABLE.

Application filed July 23,

To all whom it may concern:

Be it known that I, CHARLES l/VILLIAM VRIGHT, a citizen of the United States, residing at lVashington, in the District of Columbia, have invented certain new and useful Improvements in Concentrating-Tables, of which the following is a specification.

My invention relates to tables used for concentrating ores and is more particularly designed to provide a table adapted not only to separate the gangue from the metalliferous minerals, but also to separate such minerals from each other.

It also relates to certain structural features of such tables, whereby there is obtained simplicity and strength of construction, as well as a ready adaptability or adjustment to varying conditions and classes of materials to be treated.

In the accompanying drawings:

Figure l is a plan view of the bottom of the table;

i Fig. 2 is a plan view of the table;

Fig. 3 is a side elevation;

Fig. 4 is an end elevation partly in section;

Fig. 5 is a detail view of tilting device on the table; and

Fig. 6 is a detail of one of the supports.

The details of the construction are shown in the accompanying drawings. The rectangular frame is made of U-irons c, mm. high by 40 mm. wide, and two longitudinal U-bars Z). Small angle-irons cl placed diagonally across each corner are bolted to the frame to give rigidity. Large angle-irons 0 constitute the transverse mem bers of the frame and to these the supports and tilting device are attached. An iron rod or bolt 6 passes longitudinally through the center of the frame and serves to clamp the entire frame rigidly together. The end of this rod extends beyond the end of the table and to it the head motion is attached. This central longitudinal member of the table is important as it distributes the pull of the head motion over the entire length of the table and also acts as a pivot for tilting the table on its supports. The table top is made of l-inch boards f spaced of an inch apart to allow for swelling. These boards are screwed to four longitudinal stringers g of pitch-pine which are bolted to the U-irons. There are six flexible supports 29 for the table 30 cm. wide with Specification of Letters Patent.

1915. Serial No. 41,429.

notches p at the top in which the central rod rests. These supports are bolted to the transverse angle-irons c of the frame and to angle-iron plates 1* bolted to the foundation beam 20.

Another feature of the table is the tilting-device which consists of a double wedge a inserted between the two central supports of the table. This is entirely carried by the table top and thus a tilting frame, or rods connecting with the foundation, or other complicated devices are eliminated.

The bars Z), Z) rest on the upper face of the double wedge, while the lower wedge surfaces rest on bolts 6, t, carried by the supports p, 1), these bolts passing through slots 8, s, in the vertical web of the angle bars 0, c.

To adjust the table the bolts t, t, at the top of the supports 19 should be loosened slightly and when the table is adjusted these should be tightened again. The adjustment is effected by rotating the rod 41, secured at its inner end to the wedge a, this rod having near its outer end screw-threads engaging a nut 10. secured to the frame a of the table. A handle w is secured to the end of the rod 01. By moving the wedge, the table can be given the desired inclination. As the central member or rod passing through the center of the table is pivoted in the grooves of the central supports and the end of this rod is suitably connected with the head motion, the table may be tilted to any desired extent without affecting the driving mechanism or the supports.

The feed trough consists of a band of sheet iron 1 bent to form the front and side of the trough which is about 1 meter long and 8 centimeters wide. The back of the trough is the back board of the table, and the bottom of the trough is the surface of the table which however, within this inclosure, is raised toward the back by the insertion of a wedge-shaped strip of wood 2 under the linoleum. The distribution of the feed onto the table is through a row of small holes 3 at or near the bottom of front side of the trough. To check the flow of the water in the feed as it enters the trough and to cause a classification of the material in the feed, severalsmall screens 4 are secured in the trough at rightangles to the sides. The best results are obtained when the tops of these screens are inclined toward the feed entrance. From this type of feed trough the coarse ore is discharged through holes nearest the head of the table and the slimes nearest the concentrate end. lVash water is supplied through the pipe m, and n is a stanchion for supporting the end of the pipe m.

The upper surface of the table is covered with linoleum on the surface of which parallel riflies are attached or grooves are out. Any shaped riiiie or groove may be used, though these should be tapered to zero toward the concentrate end and terminated so that their termination points on the upper half of the table form a diagonal line and those on the lower half of the table term a convex curve relative to the lower side of the table. The advantage of this arrangement of the riiiles is to cause a more perfect separation of the concentrates from the middling product of the table.

In the treatment of ores on a concentrating table the middling product invariably forms a band which follows the points 0t termination of the ritlles and it these terminate in a diagonal line a portion of the concentrate is dragged along under the mid dlings and discharged with it oil the table. The terminating of the lower rifiles on the table in the form of: a curve so as to carry the middlings more rapidly down the table, allows the concentrate to throw out from under the middlings and discharge oil the concentrate end; which is not the case on tables where only the diagonal line of termination of riflles is used.

My invention has in practice been used for the concentration of ores containing galena and blende, and I have found that by arranging the ends of the rifiles in the manner shown, a practically clean separa' tion of galena from blende, and particularly of blende from middlings, can be obtained. The dotted lines A, B roughly indicate the limits of the area of the dressing zone over which the galena travels; the lines B, 0,

that over which the blende travels; and U, D, the general course of the middlings.

I claim 1- l. A concentrating table on the surface of which the riftles are terminated so as to form a diagonal substantially straight line over the upper half of the table and a convex curved line relative to the lower side of the table over the lower half of the table, the straight and curved lines of termination or" the riiiles together forming a convex line, the table having a dressing zone upon which all of the ritlles open.

2. A concentrating table on the surface of which the riilles are terminated so as to form a diagonal substantially straight line over the upper half of the table and a convex curved line relative to the lower side of the table over the lower half of the table, the curved line extending to the lower edge of the table, the straight and curved lines of termination of the ritlles together forming a convex line, the table having a dressing zone upon which all of the riffles open.

3. A concentrating table having a feed trough secured to same, perforated screen partitions extending across said trough to check the flow of the feed into same and to cause a settling of the coarse material at the head of the trough and of the finer material at the opposite end of the trough, the trough having small holes in its front side through which material is discharged onto the table.

l. A concentrating table, resilient sup porting devices to which said table is pivotally secured, spaced bars carried by said resilient devices, and located on each side of the center line of the table, a doublewedge between said bars and the bottom of the table, means carried by the table for moving said wedge to adjust the inclination of the table, and means for clamping the table in its adjusted position.

In testimony whereof l atlix my signature.

CHARLES WILLIAM WRIGHT.