US846483A - Gold-saving apparatus. - Google Patents

Description

H. LEGGETT.

GOLD SVING APPARATUS.

APPLICATION I'LED DEC. 14, 1906.

PATBNTED MAR.l 1"2, 19o?.

3 SHEETS-SHEET .L

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No. 846,483. PATENTED MAR. 12. 1907. J. H. LEGGETT.

GOLD SAVING APPARATUS.

APPLICATION FILED DEC.14, 1905.

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WITNESSES: IN VENT 0R.

ATTURNEI.

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Us" rn i srarns JAMES H. LEGGETT, oFoaovILLE, can" oRNIA.

GOLD-SAVING APPARATUS.

Specification of Let.: .gs Patent.

Patented March 12, 1907.

Application led Dettdftcr 14, 1905. Seria; o. 291,734.

To LZ1 wiz/0m, it m/a/y concern:

'Be it known that I, JAMES H. LEGGETT, a

citizen of. the United States, residing at Oroville, in the county oi Butte and State of California, have invented certain new and useful Impro'i` ments in Gold-Saving Apparatus, of which the following is a specification.

This mvention relates to improvements in gold-saving apparatus used on dredges.

The object or' the invention is to provide :zn apparatus of this character which for a given size offdredge will furnish a larger extent of sin'lace for the material to pass over, will deliver the material much ne arer to the stern of the dredge, thus avoiding the use et long side Huines, and will occupy less room than heretofore without interfering with the operation of the stone-stacker.

A further object of the invention is to provide an apparatus 'which will be more en`ecf tive in saving the fine gold.

In the accompanying drawings, Figure 1 is a broken side elevation of a dredge equipped with my improvement. Fig. 2 is a plan view of a grizzly used in connection therewith. Fig. 3 is an enlarged longitudinal section oit' a portion of the apparatus. Fig. 4 is an enarfred broken plan vie-ff' ci the apparatus.

.Referring to the drawings, 1 represents the body of the dredge provi ed with the usual digging-buckets and bucket-elevator 2, the

is shown as revolving on rollers 5.

.to the bottom of the riiiies.

buckets discharging into a delivery-chute 3, which chute discharges the material into a perforated screen 4, which may be either a revolving or a shaking screen, but in this case Frein said revolving screen the material drops onto the upper pan 5provided with riii'les 7. In order to render the riffles more eil'ective in saving the iine gold, at the upper end of the revolving screen are formed a suitable number of holes 8, about two inches square or larger according to the conditions, through which holes a suiiicient number of small rocks can drop onto the tables to find their way int-o the riffles, and thus keep said rifiies always supplied with rock, and as these small rocks pass over the riflles they tap the same, and thus help the gold to find its way The material falling down the upper pan' 6 impinges against a wearing-plate 9 and then falls u on a second or lower pan 1() underneath the st pan and inclined downwardly-in the opposite /'direction to said upper' pan.

This second pan is likewise supplied with ritiies 1 1. The

material then falls from said second pan onto 5 a wearing-plate 12 and thence to a bottom pan 13, likewise supplied with rifiles 14, from which it i'alls onto a cross-thune. 15, leading to the side iumes 16, which have extensions 16 and their extensions 17 likewise have rif- `iies 18 thereon. The material which does not pass through the perforations Vin the screen is carried to the elevator-buckets, which discharge it over the stern of the dredge. Any material'dropping from the deliverychute will fall onto a grizzly 19, by which the rocks are separated trom the iiner material, said rocksbeing dumped into the water, while the iiner material falls ont; a flume 20, having riffles 21, and discharging into the upper end ci: the pan 13.

The several pans are closed by doors 23 24 25. Water is supplied to the screen by a water-pipe 26.

I claim* 1. In an apparatus of the character described, the conliination of'a bucket-ladder I and digging-buckets, a movable solei... screening the material raised by said` buckets, a pan beneath said screen, a grizzly located beneath the upper end of the bucketladder and adapted to catch the material discharged from the buckets and not reaching the screen, and a flume beneath the grizzly and connected with the pan beneath the screen, substantially as described.

2. In an apparatus of the character de scribed, the combination of a bucket-ladder and diggin -buckets, a movable screen for screening t e material raised by said buckets, a pan beneath said screen, a grizzly located beneath the upper end of the bucketladder and adapted to catch the material discharged from thc buckets and not reaching the screen, and aiiume beneath the grizzly having riHles and connected with the pan be neath the screen, substantially as described.

8. In an apparatus of the character described, the combination of a bucket-ladder and digging-buckets, a movable screen for screening the material raised by said buckets, a vertical series of pans beneath said screen, a grizzly located beneath the upper end of the bucket-ladder and adapted to catch 'the material discharged from the buck- Ls and not reaching the screen, and a flume 1 beneath the grizzly and connected with one i oi said pans, substantially as described.

digging-buckets which does not fall into the' 17 over the stern of the dredge. Said ilumes IOO IIO

4. In an apparatus of the character described, the combination of a bucket-ladder and diggin -buckets, a movable screen for screening t e material raised by said buckets, a vertical series of pans beneath said screen, a grizzly located beneath the upper .end of the bucket-ladder and adapted to i 5 ets, of a movable cylindrical screen for screening the material raised by said buckets, and a pan beneath the screen for saving the fine gold, said screen being provided at its upper end With a number of holes adapted to permit a suitable number of comparatively large rocks to fall therethrough into the said pan to assist in saving the gold, substantially as described.

In Witness whereof I have hereunto set my hand in the presence of two subscribing vvitz5 nesses.

JAMES H. LEGGETT. Witnesses z MINNIE A. WELLS, CARLETON GRAY.

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