US 1010239 A
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Description (OCR text may contain errors)
SEPARATOR AND PURIFIER. I
APPLICATION FILED DBO. 7, 1910.
O 3 A v 8 6' M Patented Nov. 28, 1911 2 SHEETSSHEET 1.
J, 00x. SEPARATOR AND PURIPIER.
APPLICATION FILED DEO.191Q.
Patented Nov. 28, 1911.
2 SHEETS-SHEET 2.
Jfirz Coac M M @W JOHN COX, OF SAN FRANCISCO, CALIFORNIA.
SEPARATOR AND PURIFIER.
Application fi1ed December 7, 1910. Serial No. 596,059.
To all whom it may concern:
' Be it known that I, JOHN Cox, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Separators and Purifiers, of which the following is a specification.
This invention relates to an apparatus for cleaning and purifying white carbonate of lead and particularly pertains to a machine for removing tan-bark and other foreign matter from, carbonates, preparatory to grinding.
It is the object of. this inventionto provide a simple and effective means for separating and removing tan-bark and other materials of lighter specific gravity than carbonate of lead from the carbonates prior to grinding.
In the process of corroding lead buckles in corroding bins and removing them therefrom prior to separating the carbonates, considerable tan-bark, dirt and other foreign substances become mixed therewith, which it is necessary to remove before crushing and grinding the carbonates, in order. to prevent discoloration of the product. Heretofore, this separating process has been done largely by hand which requires considerable time and labor, and is not' efficient because fine and dust-like particles of tanbark are not removed, and by reason of its coloring character this dust causes a discoloration of the finished product when ground therewith. The difficulty of entirely removing the tan-bark and other foreign matter necessitated considerable care in removing the corroded lead buckles, but by the use of this invention such care is not required as all dirt is completely removed thereby.
The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which Figure l is a side elevation of the invention. Fig. 2 isa partial plan view. Fig. 3
is a partial end elevation. Fig. 4 is adiagram illustrating the process.
In the embodiment of this invention I employ a series of slightly inclined shaking A disposed one above'another with- "m a su table housing or casing 2. These screens A are suspended on links 3 which are pivoted at one end to the frame of the screens and at the other to the frame of the housing 2 in such manner that the screens A may be oscillated or vibrated in the directionof their length.
The vibrating of the screens A may be accomplished in any suitable manner but they are here shown as actuated by eccentric disks 4 mounted on drive shafts 5 driven by any desired power. The eccentric disks 4 operate straps 6 which are pivotally connected to the u per ends of the screens A. The wire mesh 7 of the screens A is graduated in fineness from the uppermost to the lowermost screens A, the coarsest screen disposed at the top and the finest at the bottom, as is common in grading machines employing vibrating screens.
A shaking table B may be disposed beneath the lower screen A upon which the fine particles delivered from the latter will be received and carried forward to be discharged from the lower end of the table, as later described.
The housing 2 is designed to completely Specification of Letters Patent. Patented Nov, 28 1911.
side of the end of the housing 2 and converge at their lower end in a common point of discharge. These conveyer tubes 11 are connected at a point near their lower end with a suction fan or other suitable means for creating a downward current of air in the tubes which is drawn in through the ori fices 10, the purpose of which will become apparent hereinafter.
Disposed above the outer projecting end of each screen A and table B, adjacent each slot 8, is a suction nozzle 12, having a long and narrow mouth or intake 12 which is situated in close proximity to the screen or table surfaces, and extending the full width thereof.
The nozzle 12 is connected to a throat 13 leading to a vertically arranged general or main suction pipe 14 disposed in front of the housing 2. The suction pipe'14 is connected near its upper end to a suitable fan ward current of air through the nozzle 12 and throat 13. The lower end of thepipe' 14 terminates in a hopper 16 the bottom of which is normally'closed by a slide plate 17.
A slide damper 15 is disposed in each throat 13 between the nozzle 12 and the suction pipe 14, for the purpose of regulating the suction at the intake 12' of the nozzle 12. The operation of this invention is as follows: The white carbonates after being separated from the lead buckles, are delivered to the uppermost screen A through a feed chute 18. The finest particles'ofthe carbonate and other substances mingled therewith, pass through the uppermost screen Aupon the screen there-beneath and so on throughout the series; each screen A retaining such particles of carbonate and other materials as are too coarse to pass between their respective meshes. The mat'erials supported upon the screen surface are caused to move downward toward the lower end of the screens by means of the sloping incline of the latter andthe vibration motion transmit-ted thereto by the eccentric disks 4. These particles of carbonates and other materials on passing through the slots 8 are subjected to the action of the suction nozzle 12 which action is to draw or separate such material or particles of lesser specific gravity than the carbonates, and draw them into the main or general suction pipe 14. The suctional area of the suction pipe 14 being greater than the intake of the nozzle 12, or the opening in the throat 13 and as governed by the damper 15, causes the volume of-air drawn in through the nozzle 12 to expand, thereby permitting or causing the heavier or larger particles of the materials therein to fall, downward into the hopper 16 from whence they can be removed as desired, by opening the slide bottom 17.
, The purpose of the graduating screens A is to grade the dust particles of tan-bark and other impurities that the suction of each nozzle 12 may be so regulated by means of adamper 15 that thesuction will not affectthe particles of white carbonates delivered or passed under the intake 12' of the nozzle.
For example; .if but one nozzle and a single shaking table were employed a draft at the nozzle 12 sufficiently strong to lift the large and coarser particles of tan-bark and the like, would also carry away the fine and dust-like" particles of" the carbonates: but
by subjecting the carbonates and dust-like particles to a preliminary grading process and subjecting each separate grade to a suction draft, which is regulated inproportion to the size and weight of the dirt particles in that grade, it will be readily seen that nothing but the dirt particles will be drawn into the general suction pipe 14 other than the minutest particles of carbonates such as will be caused to rise and float in the air by the agitation of the screens A. The lower most screen A is provided with a screen mesh of approximately 100 meshes to the square inch, so that the particles delivered upon the table B will be extremely fine.
The lowermost nozzle 12 will be so adjusted by means of the damper 15 that the fine dust and dirt particles of this grade will be separated from the finest particles of carbonates. These graded carbonates are'delivered tubes through the orifice. 1 0 and also pre-f vents the dust from rising in the conveyer tubes 11 and passing out the orifices 10.
The poisonous nature of the carbonates makes it desirable that the dust be prevented from floating in the air about the machine.
The dust particles drawn into the pipe 14 by the fan 18, Fig. 4, are delivered to a separator 19 through a pipe 20, and the dust drawn from the conveyer tubes 11 by the auxiliary fan 21 is likewise delivered to the separator 19- through the pipe 19'.
It is obvious that as many shakingscreens A and nozzles 12 may be employed as may be found necessary in order to effect a thorough cleaning of the carbonates.
In this description I have referred to lead buckles and in order that this may be fully understood I will state that in the method known as casting the buckles the pig lead is melted in a large iron kettle and al lowed to flow continuously on to an endless double belt of molds, which form the lead into perforated disks of about one pound each, these disks being commonly known as buckles, due to the fanciful resemblance to the large metallic buckles used as ornaments on shoes in the earlier times. It is absolutely necessary that these buckles be cast, as a rolling process would harden or change the crystalline nature of the lead to such an extent that it would be impossible to corrode it.
Having thus described my invention, what I claim and desire to secure by Letters Patent-is" 1. In an apparatus for removing light foreign substances from heavier substances,
the combination with a series of vibrating superposed screens of success1vely-dimm1sh-- receiving trough mounted on the discharge end of each of said screens, a vertically disposed conveyer tube into which all of said troughs discharge, and means for creating a downward suction in said conveyer tube.
2. An apparatus for removing tan bark and like substances from dry carbonate of lead, said apparatus including a series of superposed inclined screens of successively diminishing fineness, upwardly inclined nozzles with intakes disposed in close proximity above the lower ends of the screens, a suction apparatus and a vertical tank extending therefrom into which all the nozzles discharge, transversely disposed inclined troughs below the outer ends of the screens, conveyer tubes into which said troughs discharge, and a suction device of less power than the first named one, with which said conveyer tubes connect.
3. An apparatus for removing tan bark and like substances from dry carbonate of lead, said apparatus including a series of superposed inclined screens of successively diminishing fineness,upwardly inclined nozzles with intakes disposed in close proximity above the lowerends of-the screens, a suction apparatus and a vertical tank extending therefrom into whichall the nozzles discharge, transversely disposed inclined troughs-below the outer ends of the screens, conveyer tubes into which said troughs discharge, a suction device of less power than the first named one, with which said conveyer tubes connect, and a receiver into which both suction devices discharge.
In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.
C. C. CooK.