Патент USA US2066257код для вставки
Dec- 29, 1936. w. F. EPPENSTElNER 2,066,257 APPARATUS FOR SWEATING OUT FUSIBLE METALS Filed Dec. 6, 1934 6 Sheets-Sheet l ~~~~ " l i / I/ D a 2 ow 1H. 9 3 6. 2,066,257 W. F. EPPENSTEiNER APPARATUS FOR SWEATING OUT FUSIBLE METALS Filed Dec. 6, 1954 6 Sheets-Sheet 2 ‘\ils R7 b .V@/mW.// 11/‘////1/ 4/2 1///Hl,.1////l/.Y .l1///l1// - \ u w R Li ‘ INVENTOR BY w M ‘ Dec. 29, 1936.' 2 0, 6 6 2, 5 7 W. F. EPPENSTEINER APPARATUS FOR SWEATING OUT FUSIBLE METALS Filed Dec. 6, 1934 6 Sheets-Sheet 3 , will II! I/Ir11 II H . \W. h I I 1/1/H, /1/ 1// //1/ 0,1, .1, r / AR //I!r/ //1// /11 //1/I/llI! I”/l// ///1//1//l _/. /// /f L¢////// /// ///// _I1 . v INVENTOR Dec. 29, 1936. 2,066,257 w. F. EPPENSTEINER APPARATUS FOR SWEATING OUT FUSIBLE METALS Filed Dec. 6, 1934 6 Sheets-Sheet 5 I" .6. 311/ \\ \\ \\ \\ \\ \\ \\ \ ]u \\ \ \\ \\ \\\ H \\ \ \\ \\\\\ \\\\ \\\\\\ \\\\\\\ \\\\\ \\\\\ \ \ \\\x \\\\\ \ \ INVENTOR BY .3)‘ ' A'r‘TgziEYs’y' Dec.‘29, 1936. 2,066,257 w. F. EPPENSTEINER APPARATUS FOR SWEATING OUT FUSIBLE METALS - Fiuled Dec. 6, 1934 ‘ GSheets-Sheet 6 INVENTOR BY ' fZAT-rmvs. 2,066,257 Patented Dec. 29, 1936 UNITED STATES PAT QFEIQE 2,066,257 APBARA'I‘US FOR SWEATING OUT FUSIBLE METALS William F. Eppensteiner, Rahway, N. .L, assignor to The American Metal Company, Limited, New York, N. Y; a corporation of New York Application December 6, 1934, Serial No. 756,271 9 Claims. My present invention relates to apparatus for reclaiming more readily fusible metals from those of lesser fusibility by the application of 5 heat. More speci?cally it relates to the recovery of such fusible metals by the sweating out there of from their union with metals of lesser fusibility by the application of superheated steam. The invention is applicable to the salvaging of various metals from articles or defective structures con 10 taining them, such, for example: solder from (Cl. 266-33) articles to remove therefrom contaminating and oxidizing in?uences and also raise their tempera ture before they are subjected to the sweating process. The invention Will be better understood from the detailed description which follows, when preheating and heating chambers of the ap paratus. Figures 1 and 1a are fractional front elevations of an apparatus embodying my invention. Fig. 2 is a transverse section taken substan automobile radiators, lead from electric cable tially along the plane of the line 2--2 of Fig. 1. ' coatings, Babbitt metal from bearings, tin from tin-plate on cans and the like, and in numerous other instances where a more‘ fusible metal or section through the adjacent portions of the" preheating and heating chambers of the ap 15 alloy is to be separated from a less fusible metal or alloy. ' 20 the material to be treated in an oven or retort and subject it to the heat of combustion applied either externally or internally thereof, the more fusible metal or alloy falling into a receiver or tray beneath, while the less fusible metal or al 25 loy is pushed out or otherwise removed from the Various means have already been pro posed for agitating the metals being treated to promote separation of the fused from the non fused metal to increase the yield of the metal 30 to be recovered. . Fig. 3 is an enlarged ‘fractional longitudinal paratus. ~\ 15 Fig. 4 is an enlarged fractional longitudinal ' The method and means heretofore commonly employed to bring about such separation of metals of the class described has‘ been to place container. 10 ~ The objects of the present invention are to pro vide an apparatus whereby the treatment of metal articles or structures from which metals are to be reclaimed can be carried out on a large 35 scale and in a continuous manner, wherein the percentage yield of the recovered metals will be substantially greater than has been heretofore possible of accomplishment, and wherein the ob jectionable effects of oxidation on the recovered metals will be practically eliminated. The foregoing and other objects of the inven tion' not speci?cally enumerated are accom plished by subjecting the metals or articles from which the desired metals are to be salvaged to a 45 heat treatment in a non—oxidizing atmosphere at elevated temperature, preferably by superheated steam contained in a chamber while said articles section through the remainder of the heating chamber and showing the bosh pit into which the articles, after being treated, are discharged. Fig. 5 is a section taken substantially along the 20 plane of the line 5——5 of Fig. 4 and showing the connection between the heating chamber and a superheater. Fig. 6 is a section taken substantially along the plane of the line 6--6 of Fig. 4. Fig. 7 is a transverse section taken substantial 1y along the plane of the line ‘l-—‘l of Fig. 4 and showing in elevation the conveyor for carrying away articles from the bosh pit, and a baling press for acting upon such articles. , 30 In the accompanying drawings which illustrate ‘a practicable embodiment of my invention, the apparatus may be said to consist of a charging conveyor A‘, feed conveyors _B and C, a trommel D, a bosh pit E, a discharge conveyor F and a 35 baling press G. The conveyor C, the trommel D and the bosh pit E, are preferably enclosed in a steel casing or box H to provide a substantially air-tight closure for the unit comprising said parts. The steel box H may conveniently be formed with double, spaced apart walls It and 2h, suitably reinforced, the space between said walls being ?lled with a heat insulating material 3h, such as diatoma'ceous earth. The steel box H, it will be understood, will have a con?guration 45 adapted to enclose the aforementioned parts of the unit, suitable provision being made to take care of expansion and contraction of the plates in view of the considerable difference in tempera tures between the interior of the casing and the 50 are being conveyed therethrcugh, agitating said articles to free the more readily fusible metal therefrom and collecting said fused metal in reservoirs from which it may be intermittently outside atmosphere under operating conditions. tapped. Preferably the articles being treated are The entire unit may be supported upon a suitable subjected to a preliminary heating by the spent ‘foundation of concrete .or' the like J, while the housings A’ and B’ enclosing the conveyors A and steam after‘ leaving - the treatment chamber 55 proper, moving in a direction counter to said B, respectively, may be suppormd upon a frame 55 2,066,267 work or foundation J’ constructed of steel, rein ing, andvat their lower ends are ?tted with dis forced concrete or the like material. charge or tap-off tubes 2m which extend through the wall of the casing, and said tap-off tubes, in turn, are ?tted at their ends with rotatable elbow’ » The charging conveyor A may be of any stand ard link belt, apron type'construction, and may 5 ‘be driven by means (not shown) around the sprocket wheels a and 2a, and b and 2b, respec tively. The charging end of the conveyor A ex tends beyond the housing A’, and to preclude the free admission of air into the housing during the 10 charging operations there is provided within the .housing A’ a pair of longitudinally spaced apart ?at doors 3a and 4a, so arranged that one of the doors will be closed, as shown at 3a, when the other will be open. The charging conveyor is in clined upwardly and is adapted to discharge the articles carried thereby to the feedconveyor B ' over a downwardly sloping apron 5a leading from the discharge end of the conveyor A to the charg ing end of the conveyor B. 20 Between the housings A’ and B’ and extending upwardly, therefrom at the place of union‘is a vent stack K of a height and diameter to provide the necessary draft to draw the heating medium (superheated steam) through the casing H from 25 the discharge end thereof ‘and through the hous ing B’ from the discharge end thereof. The feed conveyor B extends through the hous ing 3' which constitutes a preheating chamber for the articles to be acted upon. Said conveyor 30 . B, like the conveyor A, may be of any standard link belt, apron type, and as ‘shown in Fig. 2, _ consists of carrying plates or pans 2b supported or L-tubes 3m which act as valves which are adapted when turned downwardly to draw of! the ‘ molten metal from the troughs into suitable re ceiving receptacles or molds 4m. At the opposite or higher ends of each of the troughs M the ‘casing is formed with an opening 5m for facilitating the 10 cleaning out of the troughs or the removal of dross and dirt from the top of the molten metal. Each of these openings is fitted with a door 6m suitably hinged in any conventionalmanner to open and close and provide atightly closed joint. 15 The ends of the troughs adjacent the doors 6m are provided with inclined closures 1m, while at the opposite ends the troughs are provided with ba?le plates 8m which extend over the entrance of the tap-off tubes 2m so that all metal to be 20 tapped off must ?ow underneath the ba?le, there by precluding the passage of dross and dirt from the troughs unless they be tapped practically dry. The trommel D into which the articles being treated are discharged from the conveyor C may 25 be of any desired or preferred construction, and ‘as herein shown, consists of a cylindrical screen d suitably reinforced by longitudinally extend ing T-beams 2d and by circumferentially disposed encircling hoops 3d and by end hoops or rings 4c!v and 5d, respectively. The end rings each carries‘a machined steel tire 6d or 1d, respec tively, which ride upon trunnion rollers 8d mount 3.0 by rollers 3b adapted to ride over tracks 4b. T0 prevent the articles being carried by said conveyor , ed upon suitable pedestals or bearings. The tire 35 from jamming within the chamber and from con id is formed around its periphery with equally 35 tacting the walls of the housing; there are mount spaced recesses or sockets 9d, within which en ed within the casing above the conveyor, skirt gage the teeth on a driving wheel llld driven by boards 5b of any desired construction and ma a suitableelectric motor (not shown). The axis terial. The housing B’ through which the con of they trommel is tilted slightly toward the dis 40 veyor 13 extends is formed with spaced openings charge end'in order to keep the articles being 40 6b in its side walls, the function for which will treated moving in that direction. Beneath the trommel and extending throughout its length and be presently made apparent. , The conveyor 0 upon which the articles to be treated are sweated, extends through the heating 45 or sweating chamber of' the device and may be of any preferred construction, and as herein shown is of the chain, grate type and consists of plvotally connected links 0 which support angle iron crossbars 2c which may be conveniently 50 -welded to the links with the angles of the bars across the width of the casing are a plurality of V-shap'ed troughs M’, which, in construction, dis position and function, are quitelsimilar to the 45 troughs M hereinbefore described. ' For facilitating the transfer of the material from the. discharge end of the conveyor C to the trommel I provide a transfer apron N, and for taking the thrust of the articles when falling 50 pointing upwardly, as best shown in Figs. 3, 4 . upon the entrance‘ end of the trommel I prefer and 5. The links of the conveyor carry rollers to reinforce the same with a conical plate “6. 1 30 and the link chains are trained over sprocket I also prefer to provide a chamber below the dis-_ wheels 4c and 50, while the rollers 80 travel over charge end of the conveyor 0 and to provide in v55 tracks 6c suitably supported by the inner wall of said chamber an inclined plate 0 extending from the ?oor of said chamber to‘ the top of the apron the casing H. Above the conveyor C and suit ably supported by theinner wall of the casing are N. The function for said plate 0 will be pres . skirt boards 1c somewhat analogous to the skirt ently made apparent. The bosh pit E located at the discharge end boards 51: in the preheating chamber, for pre 60 venting the jamming between the chain and the of the trommel is adapted to receive the articles casing of the articles while being ‘conveyed discharged therefrom. The bosh pit may be suit through said chamber. It is intended that the ' ably constructed' of concrete or the like and ‘has conveyor C in its travel through the heating or, suitable water connections e for ?lling the’ pit sweating chamber beipractically non-agitating. and sewer connections 2e for draining the pit. 65 For transferring the articles from the conveyor Within said bosh pit there are mounted suitable B to the conveyor C I provide an inclined chute L. bearing supports I provided with tracks 2! and bearings (not shown) for rollers 3! and If for Disposed between the upper and’ lower com suitably guiding the lower end of the conveyor ponents of the conveyor 0 are a plurality of V shaped troughs M formed of steel or other suitable within the pit and providing a receiving station 70 material and connected together along their top - for the articles discharged from the trommel. For guiding the discharge of the articles from edges by angle irons m. These troughs M ex tend completely across the width of the casing the trommel to the conveyor F an apron 8e sup ported by the wall of the bosh pit may be pro and cover the entire area beneath the upper com ponent of the conveyor. The troughs are all vided. Where the apparatus is constructed in twin units so that a single bosh pit may serve 75 mounted to tilt slightly transversely of the hous 55 65 70 76 2,066,257 /for both, a second apron 42 may be provided, as shown» in Fig. 4. For excluding access of, the air to the trommel through the bosh pit, the connections between the casing enclosing the trommel. and the‘ bosh pit are all water sealed, for example, by the depending plate 571 (Fig. 4) and the depending plates in (Fig. 7). The discharge conveyor F at its upper end leads to a chute P for transferring the articles 10 after having been passed through the sweating 3 above atmospheric pressure so as to exclude the entrance of atmospheric air from said sweating chambers. The draft created by the stack K will usually be sufficient to cause a normal ?ow of the steam from the sweating chambers through the preheating chamber and also draw cooling air through the openings 61) and cause it to pass in the same general direction as the steam, which is contrary to the direction of feed of the radi ators. It will thus be appreciated that as the 10 process to the baling press G. This baling press steam is being progressively cooled, the radiators may be of any desired or preferred construction, are being progressively heated and freed from and as herein shown is of the screw spindle type, adhering moisture and other volatile matter. From the conveyor B in the preheating cham which may be motor operated and consists of her the radiators will be discharged over the a plunger 9 operable by power applying means 15, 2g to compress a mass of material within the top apron-L onto the conveyor C into the heating or of a casing or cylinder 3g to bale the same, after sweating zone. Here the action of the super which said baled mass may be ejected from the ' heated steam upon theradiators as they travel cylinder by an air operated plunger or the like along causes the solder to be sweated out and fall between the angle bars, 0 down into the 20 20 4g into an open top freight car or the like Q. superheated steam for heating the chamber V-shaped troughs M underneath. At the end for sweating operations may be supplied by any of the conveyor C the radiators will be fed over the apron N into the trommel D, where, by the type of superheater R having the requisite ca tumbling action thereof, practically all the re pacity. The steam may be charged to the super maining free or uncombined solder is removed 25 25 ~heater from an ordinary steam supply line S and discharged from the superheater through the from the‘ radiators and caught in the V-shaped pipe T, it being understood that the superheater troughs M’. The traveling conveyor C in the will be equipped with the necessary indicating steam-heated chamber provides for the separa tion of the molten metal under conditions of pyrometers and other'appurtenances for main practically no agitation, while the trommel D 30 30 taining a constant temperature. From the pipe T the superheated steam may be conducted-to provides separation under conditions of violent the casing H at two points, (1) \through the pipe agitation. Separate pans being provided for the collection of the fusible metal under each of these conveyors, it will be appreciated that two types of metal are produced and thus kept sepa 35 veyor C at or near the discharge end of said rate. The metal collected in the troughs M un chamber. The pipes t and T" may be suitably _‘ der the non-agitating conveyor C is more pure formed with holes through which the steam may than that collected in the troughs under the trommel D. More speci?cally, in ‘treating auto— enter the respective chambers. It will be understood that the invention is mobile radiators, ithe solder collected in the 40 40 troughs M under the conveyor C is found to be adapted for use for treating various types of de somewhat richer in tin than that collected in n ' vices for reclaiming more readily fusible metals from the less fusible metals with which they are the troughs under the trommel. From the trommel the radiators are dischargedv associated. Speci?cally the present device has into the water ?lled bosh pit for cooling‘and are 45 been designed for reclaiming solder from auto 45 mobile radiators, and in describing the operation therein received upon the discharge conveyor F and carried to the baling press G where they are of the device such radiators will be considered as baled and discharged into the ?at car Q. Where the articles acted upon. ,. Operation.—The radiators U are manually the radiators have been charged to the device together with their frames, these frames will be 50 50 placed in position on the feed conveyor A, either together with their frames or with their frames manually removed from the conveyor F as» they removed. Depending upon the .capacity of the come up out of the bosh pit so as not to interfere device. the radiators may be charged two wide with the baling of the substantially solder-free and two or three high on the conveyor with their brass. The solder is tapped at intervals‘from hose connections, pointing downwardly. In the the V-shaped troughs through the L-tubes 3m 55 55 course of this feeding and charging operation it into the molds ‘4m. Just prior, however, to the will be understood that one of the flat doors 3a tapping operation. the dross is preferably re or 4a will always be closed so as to exclude an moved from the various troughs through the inrush of air or a discharge of steam from the clean-out doors 6m. As the device is primarily intended to be continuously operating, such tap 60 60 charging compartment of the casing H. From pings may be carried out, say once in every eight the conveyor A the radiators are fed over the apron 5a. onto the conveyor B within what is hour shift or oftener, if found necessary. The entire apparatus may be shut down for a termed the preheating chamber of the device. In this preheater the superheated steam from the thorough clean out once every ten days or two weeks, and in this connection it _may be stated 65 trommel chamber and the heating chamber en closing the conveyor‘ C will slowly pass on its way that the only places whereat trouble has been to the stack K out to the atmosphere, and in said experienced in the practical operation of the device are at the discharge end of the conveyor passage air will be admitted through the open C and at'the entrance to the trommel. To re ings 5b ‘which will serve to lower the temperature duce these troubles to a minimum I have pro of the steam as it approaches the charging end 70 vided at the discharge end of the‘ conveyor C T’ to the discharge pipes If within the chamber around the trommel; and (2) through the pipe 35 T” into the heating chamber containing the con of .the preheating chamber, and conversely, said steam will serve to progressively heat the radi ators as they approach the heating chamber proper. The superheated steam is charged to 75 the heating and trommel chambers at slightly the chutes or aprons N and O. The trouble aforementioned is primarily caused by the fact that a large part of the radiators when arriving ' at the discharge end of the ‘conveyor C are in 75 4 2,086,257 ribbon form and very often these ribbons are car ried beyond this discharge point between the chamber having air inlets for the admission of air to lower the temperature of the superheated angle bars 0 forming the grate, thus dropping steam as _it is drawn through the preheating underneath the-conveyor. The apron 0 serves to deflect this material down intothe chamber at the ‘foot of said plate, which chamber. is pro vided with the clean out door‘o. The plate 0 has also .been made removable so as to permit access to the trommel proper through said door. 10 Experience has taught that at times the material carried‘ beyond the discharge point, as explained above, accumulates and builds up against the underside of the conveyor, causing a jam which necessitates shutting down the entire unit until 15 said material can be cleaned out. It has also been found- that these ribbons occasionally build ' up in the intake end of the trommel and gradu ally build back to the grate conveyor, causing a Jam at said point. To indicate to the operators 20 that either of these plug ups are taking place, ammeters have been installed on the operating platform to indicate the current consumption of the two main drive motors. By thismeans the operators can check the currentconsumption of the motors, and when these show a constant rise above the normal operating range, the operators know that trouble is developing and can imme diately shut dowri the unit for clean out, which operation can usually be done in a short time 30 without cooling o?f the entire equipment. chamber.“ ' , . 2.~An apparatus for separating out more fusible 5 metals from less fusible metals with which they are .united, comprising a chamber adapted to contain a non-oxidizing high temperature at mosphere, a traveling conveyor and a trommel at the discharge and of the conveyor adapted to re 10 ceive metals treated by the conveyor, both the conveyor and the trommel being movable within ' the chamber, and separate means below the con veyor and below the trommel vfor collecting the molten metal separated from the less fusible met 15 als by the high temperature atmosphere while traveling through the chamber. - 3. An apparatus according to claim 2, wherein the ends of the trommel are open and theaxis of the trommel is tilted slightly'toward the dis 20 charge end thereof. 4. An apparatus for treating metals compris ing a chamber adapted to contain a high-temper ature, non-oxidizing atmosphere, conveyor means having openings therethrough movable 25 in the-chamber, substantially V-shape troughs below the conveyor means and transversely dis posed with respect thereto for'receiving ‘molten metal, said troughs being connected together at As previously pointed out, the clean out door 0 their tops to provide continuous receiving means 30 for the ‘molten metal, and means leading from will serve for cleaning out any accumulations be troughs to the outside of the chamber for low the discharge end of the conveyor C. For ~ said tapping off the molten metal from the troughs. " freeing the front-end of the trommel, a door V 5. An apparatus for treating metals compris has been provided in the roof'of .the casing H over the discharge end of the conveyor C. A clean ing a chamber adapted to contain a high tem 35 out door X may also be provided in the casing perature, non-oxidizing atmosphere, conveyor means having openings therethrough movable H at the feed end of the conveyor C to remove from beneath the apron L any accumulations in the chamber, substantially v-shape troughs below the conveyor means and transversely dis 40 which may take place thereat. , For removing solder‘from radiators, experience has taught that the best operating temperatures are as follows; in the trommel sweating chamber, from 800 ‘to 875° F., and at about six feet inside the intake and of the sweater, from 750 to 775° F. The temperature of the ‘heating or sweating chamber within which the grate conveyor ‘C moves, is‘ regulated by controlling a high'tem perature steam valve Y in the line leading from 50 the superheater to the conveyor‘ chamber, while ta Ll lated primarily by the quantity of saturated steam admitted to the superheater. Thiscan always be controlled .by setting the automatic temperature ‘regulators at whatever degree of heat is required. the temperature to the sweater over all is regu While. I have shown and described an appa ratus which was primarily designed for sweating out solder from radiators, it will be appreciated and understood that the invention is not to be 60 ‘construed as limitedv solely for this purpose, since it will be apparent to those skilled in the art that changes in construction, proportions and mechanical details may be varied within the scope of engineering skill without departing from L 65 the spirit of my invention. What I claim is: , - 1. An apparatus for treating metalscomprising a heating chamber, a preheating chamber in open communication with the heating chamber, con 70 veyor‘ means movable through the chambers, means for charging superheated steam to the ' . heating chamber, and means adjacent the arti is cle charging end of the preheating chamber for a drawing the superheated steam through the heat ing and preheating chambers, the preheating posed with respect thereto and declined toward 40 one end for receiving molten metal, means on the outside of the chamber leading from the lower ends of the troughs for tapping‘ off the molten metal from the troughs, and a ba?le in each trough extending down therein below the draw 45 o?’ tube at the draw-oft end to prevent dross from being drawn o?. . ' - , ' 6. An apparatus for treating metals comprising a. chamber, conveyor means having openings therethrough movable in the chamber, substan 50 tially V-shape troughs disposed transversely of and below the conveyor means, means at the out side of the chamber leading from one end of the troughs for tapping oif molten metal from the . troughs and a ,door in the chamber at the oppo 55 site end of each trough for skimming o? the dross from the molten metal and for cleaning out the trough. ' .-'1. An apparatus for treating metals'.compris ing'a chamber, a conveyor grate and a trommel at the discharge end ofthe conveyor grate mov able within the chamber, an inclined slide for transferringarttcles from the discharge end of the conveyor grate to the trommel, and an oppo sitely inclined de?ector slide extending from the first slide rearwardly below the conveyor. 8. An apparatus for treating metals comprising a chamber, a conveyor grate and a trommel-at the discharge! end of the conveyor grate movable within the chamber, an inclined slide for trans 70 ferring articles from the discharge and of the conveyor grate to the trommel, an oppositely in clined de?ector slide extending from the ?rst slide rearwardly below the conveyor, and a clean 75 2,060,257 out door in the chamber near the bottom of the - ’ 5 tating conveyor being adapted to receive the metals being treated from the practically non agitating conveyor, and separate means below 9. An apparatusior separating out more fus ible metals from ‘less fusible rh‘etals with which each conveyor. for collecting the molten metal ‘they are united, comprising a chamber adapted separated from-the less fusible metal by the high temperature atmosphere while traveling through to contain a non-oxidizing, high temperature at mosphere, a practically non-agitating conveyor the chamber. de?ector slide. ‘ WILLIAM F. EPPENS'I'EINER. and a violently agitating conveyor arranged, in tandem within the chamber, the violently agi CERTIFICATE OF CORRECTION. Patent No. 2,066,257. December ‘29, 1956. WILLIAM F. EPPENSTEINER. I It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, second‘ ‘column, lines 6; and '7, strike out "preheating and heating chambers of the a apparatus" and insert instead the words and colon considered in conjunction with the accompanying drawings, wherein: ; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office. ' - v -- -: ' Signed and sealed this 16th day of March, A. D. 1937. ' Henry ‘Van Arsdale (Seal) _ 'Activng Commissioner of Patents. 2,060,257 out door in the chamber near the bottom of the - ’ 5 tating conveyor being adapted to receive the metals being treated from the practically non agitating conveyor, and separate means below 9. An apparatusior separating out more fus ible metals from ‘less fusible rh‘etals with which each conveyor. for collecting the molten metal ‘they are united, comprising a chamber adapted separated from-the less fusible metal by the high temperature atmosphere while traveling through to contain a non-oxidizing, high temperature at mosphere, a practically non-agitating conveyor the chamber. de?ector slide. ‘ WILLIAM F. EPPENS'I'EINER. and a violently agitating conveyor arranged, in tandem within the chamber, the violently agi CERTIFICATE OF CORRECTION. Patent No. 2,066,257. December ‘29, 1956. WILLIAM F. EPPENSTEINER. I It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, second‘ ‘column, lines 6; and '7, strike out "preheating and heating chambers of the a apparatus" and insert instead the words and colon considered in conjunction with the accompanying drawings, wherein: ; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office. ' - v -- -: ' Signed and sealed this 16th day of March, A. D. 1937. ' Henry ‘Van Arsdale (Seal) _ 'Activng Commissioner of Patents.