US669928A - Dry-washing machine for gold. - Google Patents

Description

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L. n. HUBBARD.

DRY WASHING MACHINE FOR GOLD.

(No Il odelJ (Application filed Apr. 5. 1900.}

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No. 669,928. Patented M ar. I2, {90L L. n. HUBBARD.

DRY WASHING MACHINE FOR GOLD. (Application flied Apr. 5, 1900.}

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LEMOTT D. HUBBARD, OF CHICAGO, ILLINOIS.

SPECIFICATION forming part Of Letters Patent N0. 669,928, dated March 12, 1901. Application filed April 6,1900. Serial No. 11,743. (No model.)

To all whom it may concern:

Be it known that I, LEMoTT D. HUBBARD, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented new and usefullmpro'vements in Dry-Washing Machines for Gold, of which the following is a specification.

My invention relates to .a dry-Washing machine forgold.

My invention is intended for use in placermining, and has for one object to provide an improved apparatus for rapidly and eco nomically recovering gold by mechanically forcing the gold-bearing sand to travel over a series of grooves or pockets containing mercury, with which the gold may amalgamate, while the refuse sand will be carried forward and out of the apparatus.

Other objects of the invention relate to certain details of construction and to combinations or arrangements of parts, all as more,

fully hereinafter described, and particularly pointed out in the claims.

In order that my invention may be fully understood, I have illustrated the same in the accompanying drawings, wherein- Figure 1 represents a sectional side elevation of an apparatus constructed according to my invention. Fig. 2 represents a plan view of the same, and Fig. 3 a cross-sectional view taken on the line 3 3 of Fig. 2.

The numeral 4 indicates a cast-iron bedplate, which is planed perfectly smooth on its upper surface, so that the sand may pass readily over the same, and said upper surface is provided at regular intervals with a series of transverse grooves or pockets 5 for holding mercury or quicksilver. Each of these grooves 5 has at one side of the machine an upwardly-extending pipe 6, through which the mercury may be supplied to the groove, and on the opposite side of the machine a cook or faucet 7 for drawing off the mercury therefrom. Along each side of the bed-plate from endto end thereof extends a relatively wide angle-iron 8, these angle-irons being bolted to the bed plate and tending to strengthen the same. On their upper edges these angle-irons have an upright flange 9, which serve as a lower track for an endless brush to be presently described.

The machine as a whole is supported on a ated manually by a handle 23.

series of an gleiron standards 10, to which the bed-plate 4 and angle-irons 8 are securely bolted, these standards being offset, as indicated at 11, to provide a support for said angle-irons, as clearly shown in Fig. 3. The standards 10 are extended upward beyond the offset portion 11 and have bolted to their upper ends, as indicated at 12, angle-irons 13, which extend from end to end of the machine on each side thereof and serve as the upper track for the endless brushing apparatus. This brushing apparatus consistsof a series of rectangular frames 14, which are pivotally connected one to the other by means of aseries of rods 15, having journaled on opposite ends grooved wheels 16, designed to run on the tracks 9 and 13. Each of the frames 14 has secured in it a brush 17, which is made by inserting steel wires 'in a perforated steel plate. Two standards 10 are arranged relatively near to each other at the center and at each side of the machine, to which standards are secured cross-beams 18, which afford supports for the journal-bearings 19 of a shaft 20, extending transversely of'the machine. Near opposite ends of this shaft are secured sprocket-wheels 21, which are adapted to engage in their revolutions the rods 15 to cause the travel of the endless brushing apparatus, as will be understood. The shaft 20 is revolved by means of a drive- Wheel 22, fast on one end thereof and oper- The track 13 is shorter at each end than the track 9 and is provided with downwardly-curved ends 24, while the track 9 projects at each end beyond the track 13 and is curved upwardly at its ends, as indicated at 25, sufiicient space being provided between the tracks to permit the passage therebetween of the wheels 16, which at this point will be in contact with both rails, so that they will pass readily from one to the other in the travel of the endless brush. The curved portions 24: will also serve as supports for the endless brush at the ends of the machine in lieu of stationary wheels,

as will be seen.

The machine is made to incline from one end to the other and at its upper end is provided a sand-box 26, supported on a leg 27. On the top of this sand-box may be arranged a sieve 28 for sifting the sand into said box.

in construction and operation and having no complicated parts or delicate mechanism may be cheaply manufactured.

Having thus fully described my invention, what I claim as new is 1. In a machine of the character described, a bed-plate arranged at an inclination and provided on its upper face with a series of transversely-extending grooves for containing mercury, an endless brushing apparatus consisting of a series of brushes suitably spaced apartand pivotally connected together and adapted to contact with and pass over said upper surface of the bed-plate, and means for causing the travel of said endless brushing apparatus' 2. In a machine of the character described, a bed-plate having transversely-extending grooves on its upper surface for containing mercury, suitableinlets and outlets for said grooves, an upper track provided with downwardly-extending curved ends, a lower track having upwardly-extending ends overlapping the curved ends of the upper track, an endless brushing apparatus provided With a series of brushes pivotally connected together and means engaging said pivoted connection brushes pivotally connected together and suitably operating between said standards, a series of grooved wheels connected to said brushes and traveling upon said tracks, and means foroperating said brushing apparatus.

4. In a machine of the character described, the combination with a bed-plate provided on its upper surface with a series of transverselyextending grooves, an upper and lower track, and means for suitably supporting said bedplate and tracks, of an endless brushing apparatus consisting of a series of rectangular frames pivotally connected together by a series of transversely-extending rods carrying grooved wheels, and a brush secured to each of said frames and adapted to contact with said upper surface, and means engaging said rods for transmitting motion to said endless brushing apparatus.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- IIOSSGS.

LEMOTT D. HUBBARD. Witnesses:

WILLIAM B. KENNEY, LYMAN A. BENDER.

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