US1128807A - Jig. - Google Patents

Description

J. H. MAGBE.

JIG.

APPLICATION IILED JULY 13, 190s.

)[vee.

5 SHEETS-SHEET l.

Patented Feb. 16, 1915.

m E- -li HWMJWHHII 1 i IVIM. 5 Kv. 1 heh J. H. MAGEE.

APPLICATION FILED JULY V13, 1908y J. H.l MAGBB.

JIG.

APPLICATION FILED JULY 13, 1908.

Patented Feb. 16, 1915.

' a EBTS-SHEET S,

IIIIII Wiz J. H. MAGEE. RUG. APPLICATION FILED JULY 13, 1908.

1, 128,807. Patented Feb. 16, 1915.

5 SHEETS-SHEET 4.

A "H11 W" y wilma; y [H111 UNErED STATES PATENT OFFICE.

JOHN H. MAGEIE, 0F CARTHAGE, MISSOURI.

JIG.

l Application led IulylS, 19GB. Serial No. 443,3252 *N ,taken Part-1y .through the frame-of .the

To all whom it may coneerm-` f f Be itknownV that I, JOHN H. Meana, a citizen of theA United States of America, residing` at Carthage, in they county of Jasper and State'of Missourhhave invented certain new and useful Infipro'vements in Jigs, of whichv the following is afull, clear, and exact descriptiommeferenc'e being had-fte the accompanying drawing, forming part of this'v specification'. -f

l Myv invention relates to that class of jigs coal or other mateits ob'ect theprovision of improved means where y the entire top stratum of material being jigged may be movedforwardly in the jig continuously andintermittently ina horizontal direction toward -the discharge end offthe jigindependent of the means usedto stratify the materiall and out ofcon'- Hict with such means. -It is a well known4 fact that in the use of jigs as at present inV use, the stratificationv of the materials being jiggedis greatly disturbed and the top stratum remains in the jig. fora greater period ottime than is necessary, thereby lnterferring with thel pif, r opration of the4 jig and causing imper y the waste. constituents from the valuable constituents iii the material being jigged.`

By my present invention, I furnish a means whereby the entire top stratum is gradually carried from the receiving end of the jig to the .discharge end'lwithout interference with the descent by specific gravity of the .heavier constituents in the material being' jigg'ed asthey become separated from the constituents in the top stratums Figure I is a vertical Vlongitudinal section taken tl'ough my improved jig. Fig. II is an enlaliged 'view partly in end elevation and partly in cross section. Fig. III is an enlarged elevation of a fragment of one of the main` sprocket wheels used in. the conveyor lifting mechanism and with the shaft upon which said sprocket wheel is mounted shown incross section, taken on line III-III, Fig. II. Fig. IV is'an elevation of the wrench portion of the crank arranged for engagement with the sprocket wheel and shaft shown in Fig. III. Fig. V is' an enlarged elevation of the conveyer operating mechanism. Fig. VI is a horizontal cross section taken on lincy-Vl-VI, Fig. V.

I. Fig. VIIis-an enlarged verticalcross sec- Specication of Letters Patent.

ect separation 'of cated at a higher elevation Patented Een. 16, 1915.I

V.oeive the conveyer. frame and the means `for xuiusting'` said rest bar. Fig. X' iena diai grammaticyiew of one of theeccentrics byh5 which Vthe jig box is operated. FigQXI is van enlarged sideelevation of the .to members ofl the conveyer operating mec anism. Fig. XII is a top or plan view of the parts shown in Fig. XI. Fig. XIII is a vertical longitudinal section of a jig diering in form from that illustrated in Figs. I to .XII inclusive and with my inventionl applied thereto. Fig. XIV is a vertical .cross section. taken on line XIVf/XIV through-the jig shown in Fig. XIII. l A In the' accompanyingdrawings: 1 designatos the water tank ofmy jig, within which is contained a series of bins 2 that are separatedffrom each other by partitions 2 and 30 are-adapted to contain water as usual.

3` designates a reciprocatingr jig box that is 3 1 diomove vertically therein and which is `preivdedwith a perforated bottom or con- 85 cave screen 4,ral'so with a screenl plate 5 lohan the bottom orv Screen 4 in the plane o the entiretop stratum of the material and at the discharge end of the jig above the final bin 2 and up 90 and overv which the tailings are discharged from the jig. 6' is a feed spout or feed -hopper through which the material'to be jigged is delivered intoNthe jig box. The jig box has vertical-reciprmtion impartedntoit in order that the material in` the vjig box J\ be agitated by the movement of 'water through the perforated bottom or screenof said jig box. A Y

The means just mentioned comprises the following parts: 7 are straps'attached to the sides of the jig box and which are 'connected to vertically disposed rodsl 8 that are Aat#- tached at their upper endsto yoke's 9 that are fitted to adjustable eccentric disks 10. wir,` The eccentric disks 10 are .mounted upon rock shafts 11 journal'ed insu'itable bearing boxes mounted on the frame work f the jig above the jig box, there beingfpkefernbly two of said rockv shafts extendln `longitudnally of the jig, one at each si e thereof. In order that th eccentric disks may have an oscillatory or rocking motion iinparted to l which are united connecting rods 13. The

connecting rods 13 are in turn fitted to a lever arm 14 attached to a drive shaft 15 equipped with a belt wheel 16 to which power may be trasmitted from any suitable source. It will be seen that when the drive shaft 15 is operated, reciprocatory'motion will be imparted to the connecting` rods 13 j and said connecting rods act to impart a rocking motion to the lever arms 12 and the rock-shafts carrying the eccentric disks 10 with the result of causing said eccentric disks to impart the desired vertical motion to the jig box 3.

I now come to the escription of the end! less chaineonveyer forming a part of my jig and which controls the delivery of the material to the jig-box' and prevents the piling up of the material and by which the entire top stratum of the material delivered into the jig box is moved from the receiving end of the jig box to its discharge end without causing the bedding or lower stratum of the material deposited to travel or creep horizontally beneath the top stratum of the material deposited. while at the same time permitting'free stratification of the material in the jig box. The endless chain conveyer illustrated in the drawings and which is lol :cated above the jig box comprises a pair of endless sprocket chains 17 having flights 18, made of any suitable material, solid or perforated, secured at intervals to sait. endless sprocket chains 17. see Figs. I and II. The lower part of the endless chain conveyer is adapted to travel in a horizontal direction above the bedding or lower startum of the material in the jig' box, so that its flights will conduct the entire top stratum in a forward direction with the result of causing this entire top startum to he gradually discharged up and over the screen 5 at the discharge the jig. The endless sprocket @kilns crate at one end upon idler jvfockr reels 19 that are carried by idler shaft 20 and at the other end upon drive sprocket wheels 21 {ixed to a driven shaft 22 that is operated by mechanism to be presently described. The endless spfiocket chains of the conveyer operate 1n guide frames each of which comprises a lower channel bar 23 having flaring ends., an upper channel bar 24 having flaring ends (see Figs. I. II and V) and l.supporting bars 25 with which the channel bars 23 and 24 have slot rnd pin connection and which are loosely fitted to the idler shaft 20 and the driven shaft 22. The vguide frame just described is loosely mounted as mentioned and its parts are pivotally and loosely connected to pio 'the other end vide lfor yielding of the frame when either end of the conveyer is elevated more than by means to be hereinafter set forth. y

During the operation of my .jig the endless chain conveyer may be supported by the jig box 3 and reciprocate vertically .there-4 with.- In such instance the lower channel bars of the conveyer uide frame seat upon Z-shaped rest bars 2g having ledges 27 located adjacent to the side walls of the jig box and flanges 28 surmounting said side walls, see Figs. II, VIIand IX. The rest bars 26 are adapted to be adjusted vertically for the purpose of positioning the conveyer at a desired height above the bottom of the jig box and relative to the material that is present in the jig box during the operation of the jig. To provide for the vertical adjustment of said rest bars, I utilize adjusting screws 29. most clearly seen in Fig. IX which are seated in internally screw threaded bushings 3() in the top of the side walls of the jig box and internally screw threaded shift collars 31 fitted to said adjusting screws and adapted to operate in suitable perforations in the top flanges 28 of the rest bars. There may be any desirable number of the adjusting screws 29 and the parts companionable therewith in order that the rest bars may be raised-and lowered to any desired degree.

Referring now to the mechanism for operating the conveyer of the jig: 32 is a ratchet wheel fixed to the driven shaft 22 of the conveyer and which is held from retrograde movement by a detaining pawl 33. 34 is u push pawl and 35 a hook pull-pawl arranged for engagement with the ratchet wheel to impart rotation thereto and to the driven shaft 22, the said pawls being connectedl by the spring 36 that holds then in such positions as to maintain engagement of the points of the pawls with the'ratchet wheeL The pawls 34 and 35 are pivotally connected by a pivot pin 37 to anfoperating rod 38 preferably jointed at 39 in order that the upper portion of said rod may move laterally relative to the lower portion when the rod is reciprocated by means' to be hereinafter described. The lower member of the operating rod 38 has slot and pinconnection with a guide block 40 that is adjustably wardly through the material. In other in- 13 L lessee? 4'stances more satisfactory. results may be nc- {omplished by moving 'the' entire to'p stratum during both the rising and falling movements of the water through the` inamember upon the ratchet wheel 32 and the other of which is operable as a pulling member upon said ratchet wheel, I -provide for an intermittent actuation of the ratchet wheel and the convever of the jig upon both the downward and upward strokes of the operating rod 38. Either of said pawls may be thrown out of operative position, however, so that the other pawl alone will be operative upon the ratchet" Wheel and to permit of either pawl being moved out of its operative position, I mount in thI operating rod, threaded stems 42 protecting `laterally from the said operating l mrd and extending through lugs on the heels of the pawls and place upon the projecting ends of the threaded stems 42 thumb nuts 43 for engagement with the lugs on the heels of the pawls, in order that the points of the pawls ma)T be retracted from the ratchet wheel.

' 44 designates a bell crank lever loosely mounted upon one of the rock shafts 11 atits end adjacentto the upper end of the pawl operating rod 38 and to one arm of which is attached a loop 45 that receives the upper member of the operating rod and is adjustably held therein'by a set screw 46, see Figs V, XI and XII. The other arm of the bell crank lever 44 has loosely fitted to it a connecting rod 47 that unites said bell crank lever to a crank arm 48 carried by the main drive shaft 15, of the jig. During the operation of the jig, the, bell crank lever '44 is rocked to and fro bjureason of its connection to the main drive shaft and as a consequence, it acts to impart vertical reciprocation to the pawl operating rod 38, whereby either or both of the pawls 34 and 35 are caused to impart continuous intermit- 'tent movement to the ratchet wheel 32,

driven shaft 22 and the conveyer operated by said members. In Figs. II and XI I have shown in the arm of the bellcrank lever 44 to Which the loop 45 isapplied, a slot 44 and the loop is connected to said arm by a bolt that may be adjusted in said slot longitudinally of the arm. By thisfcon struction, I provide for the impartation of different lengths of strokes to the operating rod 38 and its pawls, and variations in the operations of the conveyer ofthe jig, according to the adjustment of the loop on said lever arm, irrespective of the speed at which the indriving shaft 15 is operated. It is obv ous that the same result may be accomplished, if desired, by providing an adjustable connection between the connecting rod 47 and the arm of the bell crank lever 44 to which said rod is attached.

' of said shaft.

I movida in myaiig means whereby the 'conveyor may be elevated to" be operatedf'lit a greater. elevation than that providedfor when" it' is supported bv' the restbas-Z. This means also Vserves to supportA the con'- veyer sufliciently above the box to permit ji ready access to the jig box igor the purpose of cleaning its screen.

49 and 50 designate drum shafts mounted in suitable bearings supported v'by the framework of the 'ig and extending transversely of the jig. hese shafts have'fixed to them above theframes of theconveyer, drums-5 52 are suspension chains attached' to t e drums 51 and having connection at 53' with ably positioned in guides 41.l The guides 41 are secured to end uprights of the frame of the jig and said boxes receivethe idler Shaft 20 and driven shaft 22A around `which the,

conveyor ofthe jig operates.

56 designates a sprocket wheel' loosely mounted upon the drum'shaft 49 neurone of its ends and in the outer face of the hub of which is a non-circular socket 57,' see Figs.

II and III. The shaft 49 is provided at lts A `of the other. The shaft 49 has fixed to it adjacent to the sprocket 56 a ratchet wheel 58 that is engaged by a detaining pawl 59 which serves to 60 is a sprocket wheel fixed to the drum shaft 50, and 61 is an endless sprocket chain leading from the sprocket,wheel 56 to said sprocket wheel 60 in order that power mav' be transmitted from said sprocket wheel 56 to the drum shaft 50. When the convcyer of the jig is to be fully elevated to any desired degree relative to the jig box 3, the crank A is so placed upon the d'rum shaft 49 that its wrench head a is fitted to the head 49 of the shaft and at the same time present in the socket. 5T of the sprocket wheel 56. Now, when therrlrank` is rotated, the drum shaft 49 will berotated directl by said crank and the drufmvshaftw wi also be rotated due to the operation of the sprocket wheel 56, the endless chain- 61 and the sprocket wheel 60 with the result of the suspension chains 52 at both ends of the jig being wound-on their respective drums.

It will be seen that asr the suspension chains are wound upon the drums the journal boxes 54 are elevated in the guides 41 whereby the shafts 2O and 22 are raised to prevent retrograde rotation j ias 80 journal boxes 54, see Fig.- II, that 21115:, Slidlift tne conveyer to the desired degree. It shoiild be here noted that previous to the lifting or lowering'of the conveyer in the manner set forth, the operating rod 38 is freed from the loop 45 by loosening the set screwsl46., I desire also to call attention to the following: When the conveyer is supported by the rest bars 26 it partakes of a vertical movement with the jig box 3 and the ratchet or feed wheel 32 moves vertically within the pawls 34 and 35. At such time the conveyer may, if desired, have movement imparted to it by securing the operating rod 38 in a fixed position through the means of the guide block 40, held in a fixed position in the guide 41, and loosening the set screw 46 so that the loop 45 may play on the oper-Y ating rod, while said operating rod and its pawls remain stationary during the vertical movement of the ratchet wheel 32. In order that the conveyer may be sustained in an elevated position when it is desired to so use it' for conducting the material in the jig boxes, I provide tlie journal box 54 with binding screws 62, Fig. II by which the'journal boxes may be tightly clamped in' the guides 41 to retain them in fixed positions. These binding screws so hold the journal boxes as to maintain the shafts 20 and in the positions to which they have vbeen elerated, in order that the conveyer will properly perform its function when operating in the jig box upon the material therein.

It is sometimes desirable to raise one end only of tlie'conveyer and when this is to be done the head of the crank A may be ap plied merely to the head 45) of the shaft 4f* without being introduced into the sprocket wheel 56. Then. when the crank is turned, the shaft 49 will he rotated without motion being communicated to the shaft 56 and as a consequence the chains 52 that are connected to the drums of the shaft i9 will lie wound upon said drums to elevate the end of the conveyer beneath said drums.

63 (see Figs. I. II, VII and VIII) nates chats pockets surmounting the partiu tions 2 in the tank of tbe jig and iwan which the chats that are deposited in Miu pockets, (in handling ore in the jig) through outlet chutes 63 one of wlii1 seen in Fig. II. The chats pockets include upper boxes 64 having closed top ends and lower onen ends and carried by the jig box 3. The upper boxes 64 are telescopically fitted in the portions of the chats pockets supported by the partitions 2 and in the wall of each upper box that faces the receiving end of the jig are orifices 65 of elliptical oval shape. These orifices are present in the walls just mentioned at such points as to be beneath the body of material, such as crushed ore in the .iig when the jig is in operation and the `may be placed 'either high or low in sai wal'ls so that the chats from the crushed ore may be drawn from any portion of the bed of ore. The orifices 65 are controlled by gates 66 containing elliptical or oval shaped openings and suitably fitted to the walls of the upper boxes 64 in aide-ways. These gates are operated by links 67 attached to the gates and the crank arm 68 of the operating rods 69 mounted in the side walls of the jiur box 3 as seen most clearly in Figs. VIID and VIII.

The orifices 65 in the walls of the chats pockets and the openings in the gates 66 which register with said orifices are made of elliptical or oval shape as stated, to furnish passage-ways for chats into the chats pockets which are approximately circular when contracted, as is desirable, and which are increased in dimensions, bothvertically and horizontally, when the to enlarge the passageways.

I wish now to make, mention 0f the fact gates are moved that in jigging various different materials it is, in order that the best results be secured, highly desirable to provide for one character of movement 0r stroke of the jig box for one material and another character ofi movement or stroke of the jig box for another material. In other words, it is. for instance, desirable in jigging one material to have the jig box move slowly at the beginning of its downward stroke, and rapidly toward tliecompletii'in o1 the stroke, and vice versa, upon the upward stroke. In jig'ging another material, it is desirable to have the jig box descend rapidly at the beginning of its downward stroke and mm'e `with a decreasing speed toward the end of the downward stroke, and vice versa. on the npevard stroke. Other characters of strokes. such as to be presently rieiitioneill, are also l 'iiral'il-v In view of what has just been sari, I provide in my construction whereby variations in movements oi' strokes of the jig box, such as those iloted, may be ained bv the adjustment of the eccentric latir@ to 'the lever arms i2, and in n 'f attention. to a dia- Fig. X. vide 'for a downward box in `which the movement rinning and gradually increases in speer.m toward the end of the downward strobe and is fast at the beginning of the upward stroke and gradually decreases in speed toward the end of the upward stroke, I position the eccentric disks l0 and the lever arms 12 relative to each other as illustrated in full lines, Fig. X, and the movement of the center of the eccentric will be that indicated by the quadrant lines at No. 1. To provide for a stroke in which the downward movement of the jig box is first comparatively slow and increases in speed at the center of the downward stroke and Weie? then again becomes slow with,inversemove ment upon,the upward stroke of the jig box, I position the eccentric disks relative to the lever arms so that the centers of the disks will move in Athe path indicated atNo. 2. When thedownward stroke is to belmade `rapid atthe beginning and slow at the ending with inverse movement upon the upward stroke, the eccentric disks are ositioned Arelative to the leijer arms so that t e centers of the disks will move in the path` indicated ratNo. 3 and when it isdesired to cause the 'ters of the disks to move in the path indicated at No. 4.

The Avarious characters of movements of the 'ig box as just previously explained may be o tained either by adjusting the eccentric disks upon their shafts to change the centers ofjthe disks relative to the lever arms 12 or bychanging the positions of the lever arms upon the eccentric shafts relative to the centers of the eccentrics.

In Figs. XIII and XIV, I have shown my conveyer which is the most important part of my present improvement, applied to what is known as the plunger type of jigs, to show its applicability to this form of jig. It is deemed sufficient in so far as the general construction of the plunger jig is concerned, to herein make mention only of the fact that it comprises a Water tank l, a stationary jig box 3 having a bottom screen 4a and plungers Xoperable in suitable wells in the tank or the purpose of forcing the water into the tank upwardly through the screen 4 in the jig box 3*. My conveyer is adapted to oper- 'ate in the jig box" to conduct the material thereinin the same manner as that herein before fully set forth and it preferably comprises elements similar to those previously described, viz: the endlesschains 17'@l and flight 18, the chains being operable upon means`by which travel is imparted tothem to cause movement of the flights in a horizontal direction longitudinally of the jig and in contact with the top strata of the material in the jig box.

I desire to add that while I have herein referred to the pockets Silas chats pockets for the discharge of chats from ores handled in the jig box of my jig, these pockets may also be used as outlets from the jig box for any components of material being jigged and lying beneath the top strata in the jig box. For illustration, these pockets may serve as draw-oli' pockets for the waste in coal when this material is being handled in my iisi I claim:

I. In a jig, the combination of a reciproeating jig box, an endless conveyer having flights controlling the discharge of material from the jig box and operable upon the entire top stratum of the material delivered into said jig box so as to conduct it in a forward direction relative to the jig box from the delivery end to the discharge end, andmeans for raising and lowering said conveyer at both ends simultaneously relative to said jig box to regulate the space between the jig bed and the conveyer, substantially as set forth.

2. In 'a jig, the combination of a reciprov eating jig box, an endless conveyer operable continually upon the entire top stratum of material delivered in said jig box and which includes a driven shaft, means for operating said driven shaft comprising a ratchet wheel fixed to said shaft, a pawl for engagement with said ratchet wheel, means for raising and lowering said conveyer, an adjustable operating rod to which said pawl is connected, andmeans for 'moving said operating rod, adjustably connected thereto, for operating the conveyer irrespective of its elevation, substantially as set forth.

3; In a jig, the combination of a reciprocating jig box, an endless conveyer operable continually upon the entire top stratum of the material in said jig box and which in cludes a driven shaft, means for operating said driven shaft comprising a ratchet wheel fixed to said shaft, a pushing pawl and a pulling pawl engaging said ratchet wheel, means for raising and lowering said conveyer, an adjustable operating rod to which said pawls are connected, and means for ymoving said operating rod adjustably connected thereto, for operating the conveyer irrespective of its elevation, set forth.

Ll. ln jig, the combination of a reciproeating jig box, an endless conveyei' operable continually upon the entire top stratum of the vmaterial in said jig box and which includes a driven shaft, means for operating said driven shaft comprising a ratchet wheel fixedotosaid shaft, a pushing pawl and a pulling pawl engaging said ratchet wheel, means for raising and lowering said conveyer, an adjustable operating rod to which said pawls are connected, means for moving said operating rod adjustably connected thereto, for operating the conveyer irrespective of its elevation, and means whereby one of said pawls may be thrown out of engagement with said ratchet Wheel, substantially as set forth.

5. In a jig, the combination of a jig box, a conveyor operable in said jig box, a conveyer frame in which said conveyer is operable, and rest bars for the support of said conveyer frame adjustably fitted to said jig box, substantially as set forth.

6. In a jig, the combination of a jig box, a conveyer operable in said jig box, a cousubstantially as iool veyer frame nwhich saidlconveyer is operable, vertically movable rest bars on which said conveyer frame is adapted to seat fitted to said jig box, and means Whereby'said vertically movable rest bars may be raised and lowered relative to said jig box, substantially as set forth.

7. The combination, with a frame work, having a series of bins and partitions separating thev bins; of the chats pockets surmounting the partitions, and having outlet chutes,a jig box havinga perforated bottom, upper boxes having closed top ends, lower Open ends and orifices in the walls thereof supported by the perforated bottom and telescopicall; fitted to the chats pockets, and means w ereby the jig-box is suspended and raised and lowered within'the frame work.

8. The combination, with a framel work having a' series of bins and partitions sepa- 'rating the bins; of the chats pockets surmounting the partitions and .having outlet chutes, a jig-box having a perforated bottom, upper boxes having closed top ends, ,lower open ends and elliptical orifices in the walls thereof, supported by the perforated bottom and telescopically fitted to the chats pockets, gates, fitted in guide ways on the walls of the pockets, and having elliptical openings adapted to control the orifices and l to register therewith, and means whereby the jig-box is suspended and raised and lowered within the frame Work.

9. The combination, with a frame Work, and a jig box having means whereby it is suspended from the frame work; of an endlessfconveyer comprising a pair of endless sprocket chains carrying nights, an idler shaft, located at one end of the sprocket chains, having idler sprocket wheels, and a driven shaft, located at the other end of the sprocket chains, having drive sprocket wheels, a guide frame having lower channel bars, upper channel bars, and supporting1 bars, the Z shaped rest bars for the guide. frame supported by the ]i g above the jig bed and serving to limit the approach of the jig be'dftoward the flights of the conveyer, -and means for suspending the conveyer within the jig box. A.

10. The combination, with a frame Work, and a jig box having means whereby it suspendedv from the frame work; ofan endless conveyer comprising a pair of endless sprocket chains-carryingi hts, an idler shaft, located at oneend o? the sprocket chains, having idler sprocket Wheels, and a driven shaft, located at the other end of the sprocket chains, having drive sprocket wheels, a guide frame having lower channel bars, upper channel barsJ and supporting bars, means for suspending the 'ponveyer within the jig box, the Z shaped rest -bars for the guide frame, bushings vin the side wallsof the ji box, and screws seated in the bushings aving v`shift collars upon which the Z shaped rest bars are supported.

11. In a jig, a tank, a reciprocably mounted jigbox in said tank, a conveyer within said jig boxadapted to remove the upper stratum ofthe `material therein, a screen forming a bottom tosaid jig box, and au extension screen projecting at one end of said jig box above the bottom thereof, said conveyer extending over the length of'said jig bottom and said extension screen, said extension screen conforming approximately to the path of said conveyer.

. 12. In a jig, the combination with a tank, of a reciprocably mounted ji box suspended within said tank, said jig ox being provided With an upwardly and outwardly curved screen at one' end thereof,fa screen located in the bottom of said jig box, said curvedfscreen overhanging the end of :said tank, and a conveyer extending over the length of said screens suspended within said jig box and arranged to remove-the top stratum of the material therein across said curved screen.

JOHN H. MAGEE. In presence of- WM. H. WATERS, TVM. BLACK.

Images