US732319A

US732319A - Ore-concentrator.

Info

Publication number: US732319A
Application number: US6654801A
Authority: US
Inventors: Edward B Rogers; Fredrick P Hanson
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-06-29
Filing date: 1901-06-29
Publication date: 1903-06-30
Anticipated expiration: 1920-06-30

Description

Hm-732319 PATEKTED J N 30, 1903. E. B. ROGERS -& F. P. HANSON.

ORE GONGEN'I RATOR.

APPLICATION IILBD mm: 29, 1901.

2 SHEETS-SHEET 1.

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. PATENTED JUNE 30, 1903.. E. B. ROGERS & F. P. HANSON,

ORE GONGENTRATOR. APPLIUATION FILED mm: 29, 1901.

N0 MODEL.

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. Q a 1% a N 3/ x Q III III III H In It UNITED STATES Patented June 30, 1903 PATE T OFFICE.

OF SAN FRANCISCO,

ORE-CONQENTRTATOR SPECIFICATION forming part of Letters Patent No. 732,319, dated June 30, 1903.

Application filed June 29, 1901.

bined influence and action of the vibratory motion of the table and currents of water fiowing over the table-surface transversely across or in directions more or less opposed to the motion. In concentrators of this description it is customary to providethe surface of the table with riffiesor standing strips ektending longitudinally and in the general direction of the motion, provision being made also for varying the inclination of the table-surface transversely for the purpose of accelerating or retarding the flow of the water.

The present invention in this class of concentrators has for its object mainly to provide an improved construction of riffled surface by which the mineral particles will be effectively separated and concentrated, and at the same time the gangue, of varying degrees of richness,will be closely graded and the grades separated one from the other for additional treatment either upon the same table or by passing it to another table.

The invention has for its object, further, to provide a simple and efficient means for-setting and fastening in place the spring-stand ards that carry the shaking-table and for adjusting the degrees of inclination of the tablesurface while the machine is at work.

To such ends and object our said improvements consist in a peculiar construction of riffied table surface and in certain novel parts and combination of parts, producing an improved machine for the purpose specified, as hereinafter described, and pointed out in the claims at the end of this specification, reference being had therein to the accompanying drawings, forming part thereof.

Figure 1 of the drawings is a top plan of a troduced.

Serial No. 66,548. (No model.)

concentrating-table havinga riffled table-surface constructed in accordance with our invention, a portion of the table between the feeding-on end and the concentrates-dischargin g end being broken out to reduce the length of the figure within 'the limits of the sheet. Fig. 2 is an elevation of the table, taken from thehigher side, where the material is first in- Figs. 3, 4, and 5 are details, on an enlarged scale,'of the spring-standards on which the table is mounted, showing the manner of securing the top end of the standard to the table and the bottom end or foot to the stationary frame, Fig. 3 being a vertical longitudinal sectional view of the sockets and fastenings,Fig.4 a vertical transverse section, and Fig 5 a top plan of the removable key that secures the ends of the standards of the sockets. Fig. dis a vertical transverse section taken through the table-surface, showing in cross-section the peculiar form of riffles employed.

The table a is mounted on spring-standards Z) Z) in the usual manner, with an inclination breadthwise or transversely of the surface,

the foot of each standard being secured to the stationary frame and the top end to the bottom of the movable table by sockets and fastenings,in the construction of which provision is made for securely fixing the standards so that they will not be loosened by the vibrations, and at the'saine time allowing a standard to be removed and another set in place without loss of time.

In Figs. 1 and 2 of the drawings We illustrate a simple mechanism for giving a rapidlyvibrating motion to the table of the character or quality necessary for producing a continuous progressive movement of the mineral upon the-surface of the channels or spaces between the riffles, but as no special novelty is claimed for the construction there shown a detailed description of such mechanism is not necessary to a clear understanding of the present improvements, which relate especially to the other parts of the machine. Other means than that therein illustrated can be employed for giving vibratory motion to the table.

The shape of the table in outline is prefer- I00 ably an irregular parallelogram, decreasing in width from end to end along one side of the longer sides and having the remaining side and the top ends at right angles to one another. This reduction in the width of the table from the feeding-on end to the concentrates-discharging end is a feature observed in the construction of many styles of tables now in use and one that is allowed by the reduction in the mass or body of the material in its progress from the feeding-011 side to the head or upper end, where the mineral is collected and discharged.

Our present construction of rili'led surface is applicable, however, to tables that are of other shapes in outline, and while we describe and show a table-surface varying in width transversely we do not desire or intend to confine our improvement to that particular shape of table.

The part or feature of our improvement which relates to the construction of the riffled surface consists in dividing that portion of the working surface a from the end nearest the feeding-on trough c, which for distinction may be termed the lower end, to about the middle line of the table into a number of parallel channels 3 by a series of rifiles or standing strips 2 of uniform length extending lengthwise of the table in the general direction of the motion. Commencing at the lower end before mentioned, the rifiles 2 terminate on a common line or a: running transversely across the table and in about the middle thereof from the higher to the lower side, and for the principal portion of that surface be tween the lower end and such median line the riffles are set and spaced at relatively wide distances apart. ()n that portion of the same surface which lies ii-nmediatelyin front of the feeding-on trough and which first receives the material from the trough the riflies 2 increase in number and are closely set and that portion of the table-surface is composed of narrower channels ithan the principal portion below. On this higher side of the table the material as it flows from the fecdingon trough is at first retarded, and its movement laterally is resisted by the closely-rittled section to such an extent or degree that the mineral particles are kept under the influence of the vibratory motion, to be acted on by the motion to a greater degree than by the flow of the wash-water and the inclination of the table-surface, while that portion of the material which by virtue of its light and valueless character is carried by the wash-water over the riftles last mentioned is allowed to pass more freely across the remaining portion of the riilied surface below because of the reduction in the number of riiiles on such lower section. On that part of the table a further variation in the character of the rifiied surface is made by inserting a series of intermediate rifiies 5 between the widely-set riflies 2, so as to increase the number of riftles for a portion of the table-surface without affecting the character of the remaining portion of the openly-riffled surface nearer the lower end of the table. For this purpose the intermediate rifiles 5 are set between the rifiles 2, starting from a line 1 y running diagonally across the openly-rifiled section from the higher corner downward to the lower side of the table and terminating at the median line a: w, or thereabout. Starting from that diagonal line y y, the intermediate rifiies are carried beyond the transverse median line :0 00 toward the foot of the table, and upon that portion of the surface lying between that line and the concentrates-discharge end they are arranged in stepped position extending beyond the ends of the principal rifiies 2 so as to terminate on a diagonal line from the higher to the lower side of the table, and dividing that surface also into a smooth or unriflled portion nearest the head of the table of a triangular shape and a riffled portion or section between the diagonal line 2 z and the adjacent ends of the principal rifl les 2. The three series of riifies 2 4 5 set in this manner produce a strip or section of rifiied surface that extends diagonally across the table-surface from the higher feeding-011 side to the relatix'elylower end, where the clean concentrates are discharged and on which the riflles vary in number both in a transverse direction directly across the table from the higher to the lower side and also in a longitudinal direction or coincident with the vibratory motion. In addition to this the rifiies will be seen to vary in number in a diagonal direction, producing a graduated surface that presents regularly-decreasing resistance in the diagonal path or course in which the middlings are caused to travel by the combined action of the motion and the inclination of the table and the currents of Water. By varying the character of the riflied surface in this manner we secure a thorough grading of the mineral-bearing gangue, holding the different grades under the influence of the vibrations without retarding too much the lateral movement and discharge of the worthless portions from the lower side of the table. In this operation we have found that the best results are secured by retarding or holding back the material to the greatest degree or extent, at first on the highest part of the table-surface, where the riliies are increased in number for that purpose, and causing the separation of the mineral to take place mostly on the highest part, where it is first introduced.

In concentrators of this class or description, in which the moving table is set on spring legs or standards, it is necessary to attach the ends of the standards rigidly both to the table and to the stationary frame, as well as to fasten them securely, so that they will not by working loose affect the character of the vibrations set up in the table, and it is desirable also to provide for readily taking out a standard when it becomes broken and for placing a new one in position without throwing the machine out of service. In this part of our improvement the top and bottom ends ICQ the construction of which will be understood.

from Figs. 3 and 5 of the drawings. The standard I) has a fl at and relatively wide shank 1), reduced in thickness to give the proper structed of wood. The top socket-iron d isprovided with a flange d, with screw-holes for securing itagainst the under side of the table, and the front side of the socket is open to admit the head of the standard, which is inserted and removed from the front side by a lateral movement, a slit (1 in the bottom of the same being provided to admit the flat shank of the standard. The lower socketiron 6 being longer than the top iron, it has a seat e at the bottom for the wedge-shaped foot b of the standard, and it is also open on one side for inserting the standard. The top rim is provided with aprojecting rim or flange e to rest on the cross-timber f, through which the socket-iron is let, as shown in Fig. 3. The lower socket-iron is made longer than the upper socket-iron for the purpose of dropping the foot of the standard, allowing a long standard to be used, and at the same time enabling the surface of the moving table to be kept at a convenient height above the base. The head and foot of the standard after they are inserted in their respective sockets are fastened in place by a forked slotted key g, inserted from one side of the socket, so as to straddle the shank of the standard just at the junction with the wedge-shaped head. This key, which is made sufficiently long for the purpose, extends beyond the side of the socket-iron and in line with a lug 71. on that part, and by means of a short bolt and nut 2', passed through the lug and the end of the key, the latter is held in place, embracing the shank of the standard and preventing that part from working out of its position in the socket.

The means for varying the inclination of the table consists of a wedge-shaped slideblock m, under one end of each of the crosstimbers f, that carries the socket-irons e of the standards, and a fixed incline n on the under side of the timber directly over the slideblock, the inclined faces of the two parts being in working position to produce vertical movement of that end of the cross-timber from the longitudinal movement of the slide-block. All the slide-blocks are connected by a long rod p, running along the side of the stationary frame, for setting them simultaneously and with an equal throw, the outer end of the rod being screw-threaded and fitted to a threaded nut or sleeve 0", with a hand-wheel s for turningit. The ends of the movable OlOSS-illlllbers that are raised and lowered by the wedges above described are detached from thelongitudinal bed-timbers in which they rest, but

are confined against lateral movement by angle-irons t, bolted to the stationary timbers on each side of the movable timber. The construction will be clearly understood from Fig. 2 of the drawings.

In situations where it may be desired to return different portions of the tailings to the higher side of the table for a second running through the table a rotary cylindrical elevator can be connected with the main shaft of the vibrating mechanism, as illustrated in Figs. 1 and 2, the connection being conveniently made by a counter-shaft y, driven from the main shaft o by belt and pulleys as and c011- nected to the shaft w of the elevator by a belt and pulleys 2', as illustrated in Fig. 1. A pipe 1, leading from the elevator to the feeding-in trough, conducts the material over the table and delivers it for a second distribution on the table surface. The construction of this elevating means is not described or shown in detail by us, for the reason that it contains no specially novel features.

Having thus fully described our invention, what we claim as new therein, and desire to secure by Letters Patent, is-

1. A laterally-inclined, vibrating ore-concentrating table having its surface divided by riffles extending longitudinally thereof, and in the general direction of the vibratory movement, the riffles at the high end of the table being arranged uniformly close together for a short distance, the remaining riffles upon the table being arranged uniformly comparatively far apart, and intermediate rifl'les ar-' ranged to extend from a line extending diagonally across the surface of the table, over the portion thereof containing the widely-arranged riffles, substantially as described.

2. In an ore-concentrating table, the combination with a transversely-inclined table-surface having a vibratory motion in the general direction of the length of the table, of a plurality of parallel longitudinally-set rifiies, variably spaced in a transverse direction, pro ducin g a closely-set uniformly-spaced section in the vicinity of the feeding-on side of the table, and an openly-set, uniformly-spaced section below, and intermediate, uniformlyspaced riffies arranged in stepped position from a line extending diagonally across the table between the openly-set riffles and parallel with the principal riffies below said closely-set section.

3. Atransversely-inclined ore-concentrating table having a riffled surface, a group of riffles being set close together at the high side of the table while the remainder of the table is covered with riffles set far apart, intermediate riffles arranged to extend diagonally of the table, so that the widely-spaced riffies project between every other pair of diagonally= arranged riffles, substantially as described.

4. The combination with an inclined ore vibrating concentrating-table, and a stationary bed, of a spring-standard having wedgeshaped heads and socket-irons having flanges for securing them to the table and the bed respectively, said socket-irons having wedgeshaped sockets adapted to receive the heads of the standards, keys for securing the standards therein and means for detachably fastening the keys.

5. The combination with a vibrating oreconcentrating table, of the stationary bedtimbers, the movable cross-timber f, socketirons (l e secured therein, spring-standards I) having their ends fixed in the lower ends of the sockets on the stationary frame but being free to vibrate in said sockets above that point, inclines 'n on the movable timbers, wedge-shaped slide-blocks m setin operative position thereto, and the rod p, threaded nut and hand-wheel as a means for moving and setting the slide-blocks, the sockets holding the standards against endwise movement.

6. In an ore-concentrating table the combination with a transversely-inchned tablesurface having a vibratory motion in the general direction of the length of the table, of a plurality of longitudinally-set riilies 2, variably spaced in a transverse direction producing a closely-set section in the vicinity of the feeding-on side of the table and an openlyset section below, and intermediate rifiies arranged in stepped position between the openly-set riflies and parallel with them.

7. The combination with an inclined ore vibrating concentrating-table, and a stationary bed of spring-standards for supporting the table on said bed, sockets upon the table for receiving the upper ends of the standards, and comparatively deep sockets formed EDWARD B. ROGERS. [n s] FREDRICK P. HANSON. I L. s.j

\Vitnesses:

EDWARD E. OSBORN,

M. REGNER.