US687920A - Apparatus for charging or discharging cyanid-vats, &c. - Google Patents

Description

No. 687,920. Patented Dec. 3, I90I.

A. D. JANSEN. APPARATUS F03 CHARGING 0R DISCHARGING GIANID VATS, 8m.

Application mea July 5, 1 899.)

l f W THE Nonms Psfsns no Hom LITHo WASHINGTON D c a., E C H I@ JVE' Patented Dc. 3, IQOI.

4 Sheets-Sheet 2.

INVENTOH A TTOHNEYS YN QM A. D. JANSEN.

APPARATUS FOR GHARGING 0R DISCHARGING CYANID VATS, &0. l `hllppliczantion filed July 5, 1899.) v(No Model.)

Niv w No. 687,920. Patented-nec. 3, v190|. A. n. JANSEN.

APPARATUS FOR CHARGING 0R DISCHAARGING CYANID VATS, 8m, l

(Application led July 5, 1899.)

(No Model.) 4 Sheets-Sheet 3.

Patented Dec. 3, |90I.

4 Sheets-Sheet ,6I

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A. n. JANSEN. APPARATUS Fon cHAnem onmscnAnama cvAnm vATs, ac.

(Application led July 5, 1899.)

(I0 Nudel.)

UNITED STATES PATENT CEETCE.

ALEXANDER DUNCAN JANSEN, OF JOHANNESBURG, SOUTH AFRICAN REPUBLIC.

APPARATUS FOR CHARGING 0R DISCHARGING CYAN|D-VATS, &c.

SPECIFICATION forming* part of Letters Patent NO. 687,920, dated December 3, 1901.

Application filed Tuly 5, 1899. Serial No. 722,873. (No model.)

To @ZZ whom, t may concern.-

Be it known that I, ALEXANDER DUNCAN JANSEN, a subject of the Queen of Great Britain and Ireland, and a resident in Royal Chambers, Simmonds street, Johannesburg,

in the South African Republic, have invented certain new and useful improvements in and relating to apparatus for charging or discharging, particularly adapted for use in connection with the discharging, rbc., of cyanid-vats and the like, of which the following is a specification.

This invention relates to improvements in connection with charging waste products, and

is particularly designed with the object of doing away wit-h manual labor in the process thereof.

The invention is particularly adapted for use in connection with the discharging of cyanid-tanks employed in the process of extraction of precious metals from reduced ores.

The reduced ore or sands7 after having been treated with cyanid solution have to be discharged either from one tank to a second or from the second tank to the dumping-site,

whereby a great amount of manual laboris involved, owing to the fact that it is neces sary to handle the tailings or sands twice.

By this invention the uppermost tank (or that one in which the first treatment is carried out) is automatically emptied into a second tank which is placed beneath it. From this second tank the tailings or sands are discharged onto a conveyer, as hereinafter de` scribed, which deposits the tailings to be discharged into a sump. From this sump the tailings are withdrawn and transported to the dumping-site by means of an improved conveyer, for which application for a patent has been lodged at the same time with this present application.

My invention will be fully described on referring to the accompanying drawings, in which- Figure l shows a general view of the arrangement of my apparatus in relation to two cyanid-tanks, one being placed above the other in the ordinary manner. Fig. 2 shows a plan View of rotating scraping-arms and doors at the bottom of the tank; Fig. 3, a detail sectional view of scraping-arm Fig. 4, a

shown, A is a central vertical rotary shaft formed at its upper end with a collar or block A', rigidly secured thereto.

B is a bearing-block bored so that the central shaft A may easily pass through it and machined ou its upper surface to form a race for the balls or rollers B', which are interposed between the collar A and the bearingblock B and are free to revolve thereupon independently. The `bearing-block B is provided with projections or wings B2, which project through longitudinal slots cut in the vertical fixed framework C, so that the said block B slides vertically in the guides thus formed in the vertical framework C. The central rotatory shaft A whileV revolving may be raised or lowered by this means at will. This raising or lowering of the bearingblock B is automatically accomplished by means of an outer hollow rotatory shaft D of an inside diameter sufficient to contain within it all the previously-described mechanism, the said hollow shaft D being Acut on its inside surface with a screw-thread which engages a corresponding male screw-thread cut upon the outer surfaces of the projections B2, which project beyond or outside the fixed vertical framework C. The outer hollow shaft D is furnished at its lower end with a spur-wheel D', which is rigidly secured there-V to and stidened by means of the brackets, as shown. The said spur-wheel DQ with outer hollow shaft D attached, is supported by means of the roller or ball bearings D?, the lower races of which are formed in the fixed framework C", to which the vertical upright framework C, already mentioned, is firmly secured. The said vertical fixedframework C is of tubular construction, provided with vertical slots through which the wings B2, attached to the bearing-block B, project.

At the bottom of the central rotatory shaft A a set of scraping-arms E E are attached of a radius slightly less than the radius of the tank in which they are intended to revolve. Motion is imparted to the hollow shaft D by means of a pinion F, which gears with the teeth on the spur-wheel D4. This action causes the central rotatory shaft A, with scraping-arms E attached, to rise or fall according to the direction in which the pinion F is driven owing to the screwthreads on the projections B2 gearing with the internal screw-thread of the hollow shaft D. The central shaft A, with arms E attached, is also simultaneously caused to revolve by the same pinion F driving a lower spur-wheel G, which is supported from the fixed framework C' by means of the ball-bearings The fixed framework C is constructed with a projecting piece C2, which is recessed so as to form the lower seating for the balls G. Corresponding projecting pieces G2 are bolted to the spur-wheel G, forming the upper bearingsurface for the balls G'. The shaft A is provided with longitudinal projections A2, and the central boss of the spur-wheel G is machined with corresponding longitudinal recesses. By this construction the rotatory motion of the spur-wheel G is communicated to the central shaft A without interfering with its upward-and-downward motion, thus allowing it to rise or fall according to the impulse of the hollow shaft I) with the screw-thread on its inner surface actuating the bearingblock B.

With reference to the upper tank, H is a center fixed tube rigidly secured at its base to the bottom of the upper tank, the internal diameter of the said tube H being such as to receive the hollow shaft D of the lower tank and the whole of the mechanism inside D when it is at its highest, the object of this construction being to avoid the necessity of increasing the distance between the two tanks, which would be necessary if the same arrangement as described in Fig. 4 were adapted to the upper tank.

To the top of the fixed tube H. a circular casting H is rigidly secured, to which casting H a further tube H2, of larger diameter than the inner tube H, is firmly keyed. To the bottom of tube H2 is firmly secured a circular casting H2, which is machined on its upper side to form races for the balls H4.

J is a spur-wheel provided with races on its lower side to rest upon the balls H4 H4, aforementioned. J is an outer tube or hollow shaft secured at its lower end to the spurwheel J, so that the two revolve together, the hollow shaft J being cut with an internal screw-thread, as shown. The fixed tube or framework H2 is forlned with longitudinal slots 7s, through which the win gs or projections K', rigidlysecured to the upper end of another tube K2, project, the outer surfaces of the said wings K being cut with a male screwthread to correspond with and be engaged by the internal screw-thread of the hollow shaft J The tube K, which passes downward easily in the space between the fixed framework formed by the two fixed tubes H and H2, terminates at its base in the boss K2, which boss K3 is machined to receive the ball-bearings K4.

L L' L are revolving scraping-arms secured to the hub or boss L, which is machined, as shown, to form corresponding races for the balls K4, so that the arms L rotate about the boss K2.

L2 L2 L2 are rods secured at their lower ends to the revolving arms L', passing upward through vertical slots or bushes L2, formed in the spur-wheel J, so that while the rods L2 L2 L2 are free to rise or fall through the said bushes L3 L3 L3 yet the motion of the spur-wheel J as it revolves is transmitted, by means of the rods L2, to the revolving arms L4. Motion is imparted to the spur-wheel J by means of the pinion J2, which is driven from any convenient motive source. The rods L2 are preferably connected at their upper ends to an annular framework L4 in order to stiffen them.

A4 is a central tie-rod passing through the center line of the discharging apparatus of both tanks, being secured at the lower end to the bottom tank and at the upper end to the circular casting H', the object being to provide a central guide for the shaft A in its vertical motion.

K2 is a light iron cylinder attached to the outer edge of the circular casting H and inclosing the whole of the mechanism of the top tank in order to prevent the dust and rain from entering.

V is the flexible pipe which conducts the sands about to be treated into the upper tank.

The construction of the scraping-arms is shown in cross-section in Fig. 3, from which it will be seen that each arm is composed of an ordinary rail E', with front and back plates E2, bolted thereto, the front or scraping plate E2 being formed with a cutting edge e, as shown. The cutting edge is of course operative only when the arms are workingin a downward direction into the tank, the dischargedoors at the bottom being open-'z'. e., when the discharging apparatus is at work. On the 4return journey-t'. c., when the tank is being filled with tailings for the next treatment--` the revolving arms answer another purpose-- viz., that of leveling the sands in the tank.

The revolving arms of the lower tank may also, if desired, be utilized as distributers of the cyanid solution when they are working upward in the tank and leveling the sands which are about to be treated by means of the following construction: On referring to Fig. 3 it will be noticed that the construction of the arms is such as to provide a channel. By boring holes E4 at intervals it is obvious that if cyanid solution be introduced into the aforementioned channels it will flow along the arms and pass through the holes E4 E4. At the bottom of the rotatory shaft A an annu-l lar trough E5 is fixed, from which pipes E6 are IIO led into the channel aforementioned formed by the upper portion of the scraping-arms E. The cyanid solution is led along the fixed pipe E' into the fixed annular trough E8, which is 5fprovided with apertures at its bottom close to the rotatory shaft A, the number of the said apertures being regulated according to the flow required. The solution falls from the trough E8 around the shaft A into the trough E5, whence it is distributed through the pipes E6 into the revolving arms. The revolving arms of the upper tank may also, if desired, while stationary be utilized as distributers of the cyanid solution after the top tank has been filled with the sands requiring treatment. The cyanid solution is led along the fixed pipe T and falls into the box T' and thence into the arms L' L' L' and through the apertures therein onto the sands.

The operation of the part of my invention just described is as follows: Motion having been imparted to the pinion J2 is communicated to the hollow shaft J', owing to J' being attached to the spur-wheel J, thereby causing the projecting wing K' and with it the tube K, with the rotatory arms L' L' L', attached, to rise or fall, according to the direction in which the apparatus is driven. At the same time the spur-wheel J rotating carries the rods L21.2 L2around with it, and these rods communicate this rotatory motion to the arms L' L' L'.

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

l. In combination with a cyanid or like tank, a vertical rotary shaft, scraper-arms carried thereby, an outer hollow rotary shaft having an interior screw-thread, and a block or nut carried by the inner shaft and threaded to engage the threads of the outer shaft, said shaft being free to rotate within said nut but being prevented from longitudinal movement through the same, substantially as described.

2. In combination with a series of two tanks placed one above the other, a vertical rotary shaft centrally of the lower tank, scrapingarms carried thereby, a threaded bearingblock at the upper end of said shaft, in which block said shaft is permitted to rotate while being held against longitudinal movement therethrough, an outer hollow shaft having interior screw-threads engaging said bearingblock, and means for driving said inner and outer shafts substantially as described.

3. In combination, a pair of tanks placed one above the other, a vertical rotary shaft A centrally of said tanks, scraping-arms carried thereby within the lower tank, a threaded bearing-block at the upper end of said shaft, in which block said shaft is permitted to rotate while being held against longitudinal movement therethrough, an outer hollow shaft having interior screw-threads engaging the bearing block, means for operating said shafts, a vertical tubular framework encircling the upper portions of said outer shaft and a tubular shaft K encircling said framework and having threaded projections, a tubular shaft J' encircling said shaft K, the projections carried by said tube or shaft K having threads engaging corresponding threads in shaft J', means for rotating the shaft J', a boss K3 on said shaft K within the upper tank, a hub L rotatably mounted thereon carrying scraping-arms, and means for rotating said hub, substantially as described.

4. In combination, the pair of tanks situated one above the other, stirring mechanism for said upper tank, having a hollow supporting or operating mechanism, and stirring mechanism in said lower tank having its operating mechanism in line with the hollow mechanism of the upper tank and means for raising said operatin g mechanism of the lower tank into said hollow mechanism of the upper tank, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

ALEXANDER DUNCAN JANSEN.

Witnesses:

ADDIE C. GLEAsoN, LOUISE J. HoAc.

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