US851757A - Ore-mill. - Google Patents

Description

PATENTED APB.. 30, 1907.

J. JOHNSON.

lORE MILL.

APPLIOATIDN FILED MAR. 12. 1906.

2 SHEETS-SHEET 1.

/NVE/vrof? Jumus JoH Nsom A TTOHNE YS PATENTED APR. 30, 1907. J. JOHNSON. ORE MILL.

APPLIUATION FILED MAB. l2. 1906.

2 SHEETS-SHEET 2.

fwn/Tof? Juuus Jo HN s oml A TTOHNEYS .preferred mechanism.

mounted a cylinder or drum A so as to re EATENT OFFIO E.

JULIUS JOHNSON, OF MESA, ARIZONA TERRITORY.

Specification of Letters Patent.

ORE-MILL.

Patented April 30, 1907.

Application filed March 12,1906. Serial No. 305,540.

Be it known tha' I, JULIUs Jonsson, a citizen of the United States, and a resident of Mesa, in the county of Maricopa and Territory of Arizona,A have invented a new and Improved Ore-Mill, of which the following is a specification.

My invention relates to that class of mills which are intended and adapledfor crushing, grinding, and thus pulverizmg ore and other substances, the 4 lass being distinguished by a toothed, or armed, cylinder, or shaft, rotating in fixed hearings, and` a greatly enlarged drum, or cylinder, inc-losing such cylinder or shaft, and revolving around it by the im pact or friction of the two.

The details of construction, arrangement, and operation are as hereinafter described, and illustrated in the accompanying drawings, in which Figure l is a cent-ral longitudinal vertical section of my improved ore mill. Fig. 2 is an end View of the interior armed c 'linder and the inclosing drum or cylinder supported and adapted to rotate thereon. Fig. 3 is a vertical transverse section on the line 25--3 of Fi f. 1. Fig. 4 is a horizontal section of the mil. Figs. 5 and 6 are sectional views of portions of the peripheries of the outer and inner cylinders, res ectively.

A horizontal sha t 1, see Figs. 1,4, rotates in bearings supported u on pedestals 2 which may be constructed) of any suitable material and which as indicated in Figs. and 4 form part of a casing or inclosure 2 for the mill. This shaft is providedowith fast and idler ulleys as shown, but i-'h is to be understood) that in place of belt gearing for driving the shaft l may employ anyother Upon the shaft is volve with it. The shell of this cylinder is preferably constructed of steel and its outer peripheral portion. is formed 'of a series of parallel bars, Fig. 3, in the form of railroad rails, the 'same being arranged longitudinally of the cylinder as shown.

As indicated in several figures, see especially Fig. 6, the bases of the rails 3,wh1ch are flat are laid upon wooden blocksor strips 4, which are curved on their inner sides to conform to the periphery 5 of the cylinder A. 'lhe rails are secured by means of clamping ieces 6,which are laid between the rails an( under-cut en opposite sides to receive thenflauges of'theflatter, iuidserew.-

l bolts 7 which pass through the said pieces 6, g between the wooden base pieces el and |I through the periphery 5 of the cylinder A. j lt will be seen that by this means the rails 3 l are secured firmly in place while in use, but l that they may be readily removed when worn, to provide for the substitution of others. The said bars or rails 3 constitute a working surface g in other words, they constitute so many .dies or stamps which in the operation of the mill, act upon the ore or other material for reducing 1t. A drum B having more than twice the diameter of the l before described cylinder A is mounted and .chiefly supported upon the cylinder A. The

periphery of this drum B is Apreferably formed of sheet steel and its inner working Vsurface is formed of rails S similar in form to railroad rails, the same being laid parallel cireumferentially and secured with their bases against the inner side of the drum. As shown in Fig. 5, the bases of the rails S are spaced apart and bolts 9 pass through the same for securing them dctachably, so that they may be removed when required; as in the case of the rails 3 of the cylinder A, as described.

An annular screen lO-sce Figs. 1, 2, 4 forms a portion of one end of the drum E, .a large central opening being left as indicated.

screen 10 may be formed as a door 11, to facilitate admission to the drum whenrequired. The other ond of the drum is formed by an annular plate 101. The oro or other material to be rcduced is fed into the drum B, through a spout 13 having a hopper 13, and projecting into' the central opening, see Fig. l. lt will be seen that the weight of the large drum B is imposed upon the armed cylinder A, its rails 8 thus bearing directly u )on the rails 3 of the cylinder A. The cylin er A being revolved with the shaft 1, it is obvious that a slower rotation will be imparted to the drum B, and thus the ore or other material contained in the latter will be carried up by centrifugal action and come between the meeting surfaces of the two parts A, B, and be subjected to a cruslung, grinding or pulverizing action whereby the desired reduction is rapidly effected. In brief' the drum B is driven by friction with the cylinder A and the speed of the latter may be ver rapid, say 100() revolutions a lminutc. Vach of the rails'b seeured to the surlace of `thecvlinder A con'stlutelwhatmay As further shown in Fig. 2a portion of this I OC.

be termed an individual die or stamp Wlntih' upon coming in contactwitlr the large diiim.

B, as they both revolve strikes With more or less force, thus increasing the crushing and l! grinding effect desired.

The ore is in any case exposed to the stamping, crushing and grinding action until it is reduced sufiiciently to pass though the screen and into an outside receptacle or it may be removed before described. y It is apparent that the operation of the inill is most effective without a greatexf# penditu're ofpcwer, since the. Weight Yof they -large drum with the contained ore is con.

ably located a little belowthe plane of the axis of the drum. In order to preventtooinuch material accumulating in the drum Bfl rovide an automatic cut-off and improved eveler or evener for the ore within the drum'. For this purpose l employ a swinging bar 14, the central portion'of the saine being parallelto the periphery of the drum`B, andthe side arms being bent and extended vlaterally and upward to pivotal point 15-see Figs. 1 and 3. Such points are located preferably at one side of the axis of the cylinder A and slightly below the saine. .'lo the middle portion oi' one of the arms ofthe bar 14 is attached a plate 16, which when the free end of the bar raises to a suiiicient height covers the mouth of the feed pipe i8 and thus arrests tlic llow of ore therefrom. In Figs. 1

and 3, the bar 14, as shown in full lines, is in sucli position that the month of the feed pipe 13 is uncovered; ybut when in the position shown b dotted lines, the mouth is covered by the pli/ate 16. By this means l provide an automatic-feed regulator which is simple, and equally effective in preventing the overload, ing of the mill. It will be seen that the central straight portieri of the bar coming in contact with the orc which may be irregularly deposited and distributed on the 'bottoni of the drum B, serves to leveland spread the saine, which operation facilitatesl the grinding and pulverizing action. l

ln practice the inner cylinder Arnay-be iilled with sonic materiale-say cement-for `theA purpose of increasing its solidity, andV thus enabling it to resist more efl'ectually t ie impacts or blows incident to rotation and cling thereon.

'llie mill mar be operated with the expenditure ol' coiiipaiatlvely little power. lt n iay be transported in a disiiieinliered conthrougli a door 11 provided inthe screen as ore 'or other' y periphery of?l the cylinder yrails detacliably to the periphery of the cylcontact with the ore druii'i B resting and travdition, and V'thus set up in the mountains or other place which Would be'inaccessible tostructed since they are individually a'n article of ordinary manufacture.

ll hat l claim is- 1. The improved ore mill formed of a hori- Zontal cylinder having its peripheral grinding portion formed of aseiies 'of bars extending transversely and parallel; and an inclosing drum resting, and its Weight entirely supported upon, sucli cylinder, so that it constitutes the ore-crushing medium, said drum having its grinding surface formed of a series of bars extending circumferentially parallel and thus in planes perpendicular' to the bars of the cylinder, as described.

2. In a mill for the purpose specified, a ro tatableycylinder, a series of .rails similar to railroad rails and having flat bases and interposed hlocks which are curved on the inner 'side and flat on the outer side to forma suitable bearing for the flat bases of ltli'e rails, and bolts passimr through said blocks and the for securing the inder, substantially as described.

3. In aiiiill for the purpose specified, the combination with a horizontal rotatable cyl inder, a drum inclosing the saine andresting and traveling thereon, and a feed spout fixed to a suitable support and projecting through the open end of the drum :below the cylinder,l of a feed regulator comprising a bar pivo'ted at its ends and having a middle portion which is out of alineinent with said ends and adapted to come in contact with and sweep over the ore in thev cylinder, and having a plate secured to it and arrangedin a vertical plane so that it is adapted, when the fre'e end of the bar is raised,.to cover the inouthof the feed spout and thus arrest the flowof material into tire drum and lateral supports in which said bar is journaled, lsubstantially as set forth. l j

4.Tlie combination, with the'horizontal rotatable cylinder and a drum inclosing'and, resting upon the saine and traveling theren with, of 'aiirorefleveler and distributer com sisting of an angular bar Whose ends are piv.- oted Vexterior to the drum, its side arms eirallel'to the periphery of the drum and Vso located that it may come in contact with aci j tendedthrougli the openings in theends of', 'the drum and its central portion `loeing par-

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