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July 19, 1938. V H. w_ Mom. . 2,124,205 AMALGAMA‘I'OR v Filed Feb. 16, 1937 5 Sheets-Sheet‘ l Wale.’T11 'A/wem M/Vw/e I ‘ INVENTOR. 1:‘ ATTORNEYS. ,3 ‘ July 19, 1938. 2,124,205 H. w. MOIR AMALGAMATOR Filed Feb. 16, 1937 3 Sheets-Sheet 24 42/ 7 , %/AQ /// . 7/2 MWIJ| 12IilJ.| w. INVENTOR; /////?/?Y W?ane ATTORNEYS. 2,124,205 Patented July v19, 1938 1 UNITED STATES PATENT OFFICE AMALGAMATOR Harry W. Moir, Seattle, Wash., assignor to. Robert . Gillespie, Seattle, Wash. . ‘ Application February 16, 1937, Serial No. 125,983 12 Claims. (Cl. 209—-j54) This invention‘ relates to improvements in amalgamators for the recovery of free gold 'from ore or'sand, and it has for its principal objects to provide a mechanical, rotary amalgamator for I the above purpose, of relatively inexpensive con free mercury without fouling has always re mained. . struction; of a kind that is readily adapted to whereby those disadvantages are present-day milling or sluicing operations; which minimum. requires little power for its operation, and is ca pable‘ of recovering a much greater percentage 0 :of gold than has been» possible by the use of amalgamators of the various kinds heretofore ‘ commonly used. More speci?cally stated, the present invention resides in the provision of a rotary amalgamator lincluding a housing designed for the passage making the gold particles amenable’to amalga mation. . . " Explanatory to the advantages of the present .‘device, it may be here stated that the recovery 3 O of metallic gold by amalgamation has been prac tised for many years.‘ The af?nity of quicksilver for gold and silver in their‘metallic'states has long been well known, and the method of recov -; eringfgold most widely used heretofore has con 85 sisted in passing gold bearing sands or ground over silvered copper plates whose surfaces have been treated with mercury. Although this old method of gold recovery is still widely used, it is ‘ 46. being gradually discarded in favor of more mod ern methods, since it is now well known that only a fair percentage of gold in any material is re r. . companying drawings, wherein Fig/1 is a perspective view of the machine,v illustrating the removal of the discharge end spout and a partial Withdrawal of the plates. Fig. 2 is a partial elevation, showing the driv of the plates. " by oxidized coatings are removed from free gold, . , the improved details of construction, the pre-‘ tion, and wherein there is contained a plurality plates by direct impact, and also taking advan- ‘ , tage. of the abrasive effect of the material where reduced to ‘ a ferred‘ forms of which are illustrated ‘in the ac ing gears. to contact with the plates in its passage, thereby e?ecting a cleaning action of the pulplupon the ‘ In'accomplishing these objects,.I have provided therethrough of pulverized material from the mill ‘discharge or the flow from the sluicing opera— ‘ of quickened plates that are associated with ‘ means in the housing for causing all solid matter ~ In view of'the above mentioned disadvantage of amalgamators as heretofore‘ used, it has been the object of this invention to provide a machine it“ ‘ -Fig. 3 is a detail in perspective of a part of one ' _ . , Fig, 4 is a central, longitudinal section‘ of the machine. war Fig. 5 is an end elevationshowing the driving gearing. , Fig. 6 is a cross section on line 6-.-6 in Fig. 4. Brie?y described, the present invention com prises .a cylindrical housing that may be disposed horizontally, or substantially in a horizontal po as: sition, and rotated. This housing is equipped in~v teriorly along its walls with spaced, longitudi-' nally extending ribs or ?anges, whereby the sand ‘ in a placer operation, or pulverized material in at? a milling operation, delivered into one end of the rotating housing, will be caused’ to be turned and rolled in its passage to the opposite discharge end of the housing. Supported within the housing, lengthwise thereof, by a removable frame con struction, are quickened plates against which the moving material is caused to contact in its pas; sage through the housing as it is rolled over and over and Washed through‘ the ‘ machine. 351 The spider which supports the quickened plates may be loosened and then bodily removed'from the housing for cleaning the gold from the plates. covered thereby. The low percentage of recovery ‘ 1 Referring more in detail tolthe drawings-— ‘ ' 4'5 40 * is the result of many causes, among them being The cylindrical drum, designated in its en 45 ‘a too rapid ?ow of water to allow the ?ne gold tirety by reference numeral I and constituting to settle and the accumulation of a metallic ?lm what is referred to as’ the housing of the amalga on the surface of the mercury from the base metals in the material which prevents either free or pre-amalgamated gold from contacting 50 the plates, thus causing considerable loss in values. ‘ mator, is supported horizontally, orslightly in clined downwardly from its receiving to its dis-r charge end, for axial rotation upon‘ a portable base frame structure. This structure ‘comprises 501 parallel, opposite side beams 2 and? Z'Whichv are Many mechanical devices have been developed joined across their corresponding‘ ends" by beams in recent years for the recovery of ?ne gold by 3 and 3', forming a rigid and substantial base.‘ amalgamation, but the problem of 'bringing‘?ne Fixed‘upon the base frame at its, cornersarei 55 l‘material into contact with quickened'plateslor ‘ grooved rollers 4 mounted bylhousings 5‘and‘ar--' 2,124,205 , ranged for the support of the drum for rotation thereon as will be understood best by reference to Fig. 6. The drum or housing I is equipped at its op posite ends with annular closure disks ‘I and 8, which, as noted in Figs. 1 and 4, are of larger into the ends of the spider arms to engage with the ribs to retain the frame at a set position. Supported on the shaft 40, just within each of the spider frames 4| and 42, are plate support ing spiders 50 and 5|, each having a plurality of radial arms, corresponding in number and ex tending into the spaces between the longitudinal ribs, as observed in Fig. 6, corresponding arms of the spider frames 50 and 5|, at opposite ends of the frame, support the quickened baffle plates 10 tion. ‘7 .' ~ " VI " ' It will'be observed by reference to Fig. 5, that 50.‘ ‘These plates, as observed by reference to a driving ring gear I0 is ?xed concentrically to, ‘ Fig. 6, are disposed in planes radial of the lon the disk ‘I and this gear is driven by a pinion ||~ " git'udinal axis of the machine and extend from supported in mesh therewith on a driving shaft the central shaft into close, spaced proximity along their outer longitudinal edges to the side 15 15 I2, which shaft is revolubly contained in a walls of‘ the housing. Each plate is made of cop mounting bearing l3. The shaft may be rotate‘ diameter than the drum, and each resting at its lower edge within the grooves of paired rollers 5, thereby to support the housing for easy rota ably driven by any suitable means, such as by " per and is‘ plated with silver. a driven belt operating over-avbelt pulley_.|4 ?xed 20 These plates are what are referred to as “quickened plates”. The core shaft 40 which supports the quickened thereon. In Fig. 4, it will be noted that the end disk 1 I plates, as Well as the baffles formed by the lon 20 which ‘closes the receiving end of the housing, gitudinal ribs .25, are of aluminum. It vwill be noted also by reference to Fig. 4, has a circular, concentric opening l5 over which a collar I6 is ?tted. Thecollar is secured by bolts |'| that. are extended therethrough and through the disk, and having wing nuts |‘|’ threaded onto theirouter ends. Thevcollar pro vides a central opening |8 into the housing about which opening ‘is an inwardly extending and in— wardly. ?ared conical ?ange |9. ' ' > The disk 8 that closes the outlet end of the housing likewise has a relatively large central opening 20, and, over this is ?tted a’closure plate 2| secured by bolts 24 and wing nuts 24', and having a large central opening 22 from which ex-v tends an outwardly ?ared discharge spout 23. ‘ Extending lengthwise of the housing |, at equally spaced apart intervals, are ribs 25, here shown to be six in number. These are ?xed at their ends to the annular disks] and 8 bymeans . of bolts‘ 21. The spaces between adjacent ribs " are closed by wall plates 2|, as seen best in Fig. 6, and these are secured by bolts 28 extended through their edges and threaded into shoulders 25' projecting laterally from theopposite sides 45.: of the ribs. ' In the use of the device, it is understood that a certain amount of mercury is allowed to run free in the drum, and in order that the interior of the housing may notbe acted upon by this mercury, the plates 2| are vulcanized on their inside stu'faces with a layer of rubber 29. The longitudinal ribs 25 are relatively thin and extend a substantial. distance toward the central axis of .the. drum andthereby operate as baffles whereby, incident to rotation of the drum, the ‘sand or milled material passed through the de vice will be caused to be rolledand turned, over‘ and over, incident to the rotation. , The ba?ie forming portions of ‘the several ribs 60. 25 are recessed, or, cut awayfor a spaced interval at the receiving end of the machine, as will be noted in Fig. 4 so as to leave a clear annularv space within the drum adjacent the plate 1 for a better distribution of sand, as received, to the spaces between the various ribs; itbeing?undera ’ stood thatin ,use of the device, the material to be treated is delivered with a, ?ow of water intov the machine through the opening l8 from a pipe‘ or the like, as designated at 35. , that a conical closure piece 62 is ?xedhcoaxially of the spout 23 with its base engaged against the spider arms 4|, leaving an annular outlet 53 into the spout. The cone is supported in place by three equally spaced plates 64 ?xed in the spout 23 in planes axially radial thereof. Also, 25.. an annular ?ange 10 is ?xed just within the mouth of the spout 23 to catch any free mer cury. ‘ . Each of the plates 60 has a bar or rib 65 ?xed to its outer the bar are the ends of are held in longitudinal edge, and the ends of adapted to dove-tail into slots 66 in the arms of spiders 50 and 5|, and 3,51 place by bolts 61 extended through the dovetailed parts. - Assuming the device to beiso constructed, and properly charged with mercury, and assuming it to be designed to receive material, such as sluiced sand or crushed ore, into its receiving end, it is apparent that with the drum in rotation, this material, as washed through, will be caused to be turned . over and over byv the ba?ies and thrown time after time into contact with the 45; quickened plates 60. This action not only brings all of the solid material against the plates, but it effects an'automatic cleaning of the latter to keep them from fouling. Furthermore, the action of the machine which throws the material into con stant contact, has which removes the collect on particles When it becomes an abrasive effect thereon oxidizing coating that may of free gold. desirable to clean the quick ened plates 60for the ‘removal of gold, the set screws 45 are loosened. 5.5.; The collar 2| is re moved fromthemachine, and then the entire frame, withvthe plates therein, is ‘bodily moved endwise, from the dischargeend of the machine, as indicated in Fig. 1. The plates 60 may then be removed from their supporting spiders .by re moval of bolts 51 and cleaned, then. replaced, and‘ the parts moved back-again to an assembled operating relationship. . I , _It is a feature of this construction that the 6,51. spiders, 50 and 5| may be rotatably adjusted on thesupporting shaft 40 to locate the quickened' plates closer to or farther from the ba?ies from Supported longitudinally and axially Within the , which material is poured thereover incident to housing is-a shaft 40. This isrigidly supported at its opposite ends =by'spider, frames 4| and 42,, the radial legs of which-are grooved to, slidably receive thereinqthe inner edges of certain ribs, 752: of the housingmand set screws 45 are threaded rotation of the drum. This will be understood. by reference to Fig. 6 wherein’ the drum is ro tating clockwise and a close adjustment of plates to the baiiles .is indicated in dotted lines. ,This machine is relatively inexpensive to con- 75;; 3 2,124,205 struct, is readily portable and can be'driven by use of a one-horsepower motor. By the present means, a method of forcing all solid matter into direct contact with the amal gamating machines has been employed whereby recovery of gold reaches high percentages not possible in ordinary amalgamators. Having thus described my invention, what I claim as new therein and desire to secure by 10 Letters Patent, is-— 1. An amalgamator comprising a rotary, cy lindrical drum provided'at its opposite ends with receiving and discharge openings, and supported in position for turnover of material in its delivery 15 through the drum, and quickened plates sup ported in the drum in planes radial thereof and spaced from the walls of the drum to recurrently receive the material thereagainst. , 2. An amalgamator comprising a rotary, oy 20 lindrical drum provided at its opposite ends with receiving and discharge openings, and supported ings, a plurality of longitudinal baffles in‘ the drum, extending inwardly from its side Walls to effect the recurrent turnover of material in its travel through the rotating drum, a frame bodily movable into and from the drum through one end thereof and comprising an axial shaft, spiders ?xed to the shaft at its ends and sup 10 portingly engaged with said baffles, another set of spiders mounted on the shaft and having ra-y dial arms, and quickened plates mounted at their ' opposite ends in corresponding arms of the last mentioned spiders whereby the plates are sup 15 ported for receiving the material thereagainst. "I. An amalgamator comprising 'a rotary cy lindrical drum having receiving and discharge openings at its opposite ends, respectively, and supported for a horizontal travel of material 20 currently receive the material thereagainst, and means mounting said plates and‘ bodily remov able from the drum. 3. An amalgamator comprising a rotary drum, and means for adjusting the frame to vary the spacing between the plates and ba?les. 8. A device as in claim 6, wherein the arms of provided at its opposite ends respectively with the ?rst mentioned spiders are grooved at their‘ ends for receiving the edges of the baffles, and livery through the drum, and quickened plates supported in the drum in planes radial thereof 25 and spaced inwardly from the walls thereof to re receiving and discharge openings, means in the drum to provide for a recurrent lifting and down pouring of material in its passage through the drum, and quickened plates supported in the 35 drum lengthwise thereof and spaced from the walls of the drum to- receive the material there against. 4. An amalgamator comprising a rotary, cy lindrical drum provided at its opposite ends re H) lindrical drum,’ provided at its opposite ends, respectively, with receiving and discharge open therethrough, ba?les extended lengthwise of the drum and radially inwardly from its side‘ walls, a frame supported within the drum and rotatable therewith, and quickened plates mounted by the frame and extended lengthwise of and spaced 25 inwardly from the drum intermediate the baffles, in position for turnover of material in its de '30 6. An amalgamator comprising a rotary cy spectively with receiving and discharge openings, are slidable along the baflles as itrackways into and from the drum, with means associated with said spiders for engaging the ba?ies to lock the plate supporting frame in place in the drum. 9. A device as in claim 6, wherein the second set of spiders is rotatable on the shaft for ad justing'the position of the quickened plates rela tive to the baffles. ' 10. A device as in claim 6, wherein the quick- . spaced, longitudinal means in the drum for ef fecting a recurrent turnover of material in its ened plates are removably mounted by their‘ sup porting arms. travel through the rotating drum, a frame sup ported in the drum and adapted for removal 11. An amalgamator comprising a horizontally disposed rotary drum, means for rotating the drum; said drum having closure plates at its 0p posite ends provided with concentric openings for receiving and discharge of material, baffles in the drum, lengthwise thereof and spaced apart, and extending inwardly from its side walls; said baliies terminating short of the end plate at the receiving end of the drum, and quickened plates supported in the drum and inwardly spaced from the outer walls of the drum, between the baffles; to receive material thereagainst from the baffles. 12. A device as in claim 11, wherein the quick 55 ened plates are disposed in planes radial of the drum and extend from the axis outwardly be tween the ba?ies with their outer edges spaced therefrom, and quickened plates supported by said frame in planes radial of the drum and be tween the spaced means for receiving the mate rial thereagainst from the baffles. 5. An amalgamator comprising a rotary, cy 50 lindrical drum, provided at its opposite ends, re spectively, with receiving and discharge open ings, a plurality of spaced, longitudinal ba?ies in the drum extending inwardly from its side walls as means for e?ecting a recurrent turn 55 over of material in its travel through the rotat ing drum, a frame supported in the drum from said ba?ies and slidable on the baf?es into and from the drum through one end opening thereof, means for securing the frame in functional posi 60 tion in the drum, a plurality of quickened plates mounted in the frame in planes radial of the drum between adjacent baffles to receive the ma terial thereagainst from the ba?‘les. from the side walls of the drum. ' 60 HARRY W. MOIR.