US852173A - Pulverizing or grinding mill. - Google Patents

Description

PATENTED APR. 30, 1907. J. W. FULLER. JB.

PULVERIZING 0R GRINDING MILL.

APPLICATION FILED JAN. 5, 1906.

2 SHEETS-SHEET 1.

rm: mmm: percus ca., msm/mrow. 0.a.

PATENTED APR. 30, 1907.

J. W. FULLER, JR. PULVERIZING 0R GRINDING MILL. APPLICATION FILED JAL s 190e 2 SHEETS-SHEET 2.

UNITED STATES JAMES' w. FULLER, or GATASAUQUA, PENNSYLVANIA.

lFULVEFIIZINGX OR GRINDING MILL.

Specification of Letters Patent.

Patented April 30, 1907.

Application filed January 5, 1906. Serial No. 294,683.

To a/lZwh/om it may con/cern."

Be it known that I, JAMES W. FULLER, Jr.,

a citizen of the United States, residing at Catasauqua, in the county of Lehighl and State of Pennsylvania, have invented certain new and useful Improvements in Pulverizing or Grinding Mills, of which the following is a specification.

Myinvention has relation in a pulverizing io or grinding mill to means for elevating and fanning of matter through the screen of the mill to separate the coarse matter from the fine matter" such as cement, coal, culm, clinker orother lmaterials for various uses;

l and in such connection it relates to the constructive arrangement of said means for the definedpurpose.

The principal objects of my invention are first,gto provide a pulverizing or grinding mill zo with two series otobliquely arranged wings i or blades`- located above each other and adapted when.v actuated to elevate matter from the grinding means,` and deflect the same toward a Screen to permit of the dis- I z5 charge thereof through the same; second, to provide the lower series of wings or blades `with flanges which in conjunction Awith the y'blades or wings are adapted to collect and v conduct coarser matter, not passing through l-3o-thescreen ofthe mill and descending by Y gravity, back into the path of the grinding means of the mill; third, to arrange the lower series of blades or wings so that theyv are I maintained in operativeposition in proxim- 35 ity to the grinding means of the niill to remove matter accumulating on Vcertain portions of the grinding means back into the path of such means; and fourth, to provi'de a su port for the blades or wings to ,i io-permit o :free circulation of air between the same and of the passage of matter to be ground introduced from the upper portion of the mill into the path of the grmding means.

The nature and scope of my present inl vention will be more fully understood fromv the following description taken 1n connection with. the accom anying drawings forming part hereof, in w 'ch' Figure 1, is a view-partly in vertical central f 5o section and p artly in elevation of a pulverizing or grmd `mill containing a farming means 4embodlyigng the particular main features of my said invention. Fig: 2, is a top or. plan view enlarged, of the fanning means and support thereof removed fromthe mill;

and Fig: 3, is `a front elevational View of said fanning means.

Referring to the drawings a, represents the driving shaft arranged vertically in the mill. 0,1, is a driving pulley for the said 6o shaft. Within the casing b, traversed by the shaft a, is arranged an annulus or grinding ring c2. To the shaft a,is suitably secured a frame or carrier c, for the grinding balls c1, and a disk-like platform c3, upon which the fine particles from the mill are collected, after separation, and prior to discharge through a spout or outlet c4. Upon the casing b, is'arranged a frame b1, adapted to support a screen d, and a casing d1. upper end by a ring d2, and a plate d3, removably secured thereto. In the plate d3, is provided an opening d4, adapted to errnitv of the entrance of matter to be groun into the mill. To the carrier c, for the grinding balls c1, is removably secured a frame provided with outwardly and upwardly aring arms f1, serving to hold the balls c1, in position upon the carrier c. To the extension f 2, of the arms f1, is secured an annular skeleton body 8o or support H, consisting of two rings 71.1 and h2, connected with each other by strips or bands h3. To the lower ring h1, at suitable distances apart are rigidly secured by means of brackets h5, obliquely arranged win'gs or 85 blades h4, provi-ded with laterally projecting flanges h, preferably triangular inl outline.

As shown in Fig: 1, the wings or blades h4, are held by the ring h1, in a position, in which v the same project a certain distance over the 9o ring c2, and are held with their anges h, in alinement with the inner upper surface ofthe grinding ring and in proximity thereto, for a purpose to be hereinafter more fully eX- plained. To the upper ring h2, are secured at certain distances apart by means of brackets Y, g1, obliquely disposed blades or Wings g, occupying a position intermediate of the blades or wings h4, and overlapping the same. When the respective series of wings or blades roo h4 and g, are rotated in the direction indi cated by the arrow in Fig: 2, the lower wings or blades 71,4, owing to their different angular positions with respect to the upper wings or blades g, will by producing a current of air v llect the same as well as the current of air 11o The frame is closed at its 702 .y

against the screen d, to cause the particles of matter of certain degrees of fineness to be forced into a chamber d5, formed by the screen d, and casing d1, and this matter to then descend by gravity through passageways d6, into a chamber (Z7, from which the matter 'is removed through the spout c4, by means of the rotatable platform c3. The coarser particles of matter which are raised by the rotation of the wings or blades 7L, and forced by the wings or blades g, against the screen d, will by being prevented a passage through the screen d, descend by gravity and be brought into intimate contact with the lower series of wings or blades h4, and by them directly delivered into the path of the active parts .of the grinding ring c2, and balls c1, by the flanges h6, which confines the matter against centrifugal action upon the blades h4. Certain ofthe particles of matter accumulating on the upper. surface of the grinding ring c2., will also be swept from this ring by the flanges h6, of the lower series* of wings or blades 71,4, which by tending to force the current of air upward parallel to the walls of the frame b1, will remove the particles from the ring c2, into the path of the grinding surface of the ring c2, and balls c1.

The annular skeleton body or support H, due to its constructive arrangement will divide the chamber formed by the frame b1, ring d2, and cover plate d3, into two concentric sections, in the outer of which move the y blades or wings h* and g, and in the inner of which free from any obstruction, feed through the inlet d4, descending. matter to beground to the grinding means of the mill as well as a portion of the current of air raised in the outer section by the lower series of wings h4, anddeflected into the chamber d5, by the upper series of wings g. These wings or blades g, by rotating are prevented bythe annular support H, from greatly affecting the matter descending in the inner central section formed by the same as well as the slight current of air which has escaped the action of the wings or blades g, and which by abutting against the cover plate d3, of the frame b1, will be deflected by the same into the inner section. The influence of the rotating wings or blades g, however, is sufficient to draw finely divided matter descending into the inner section directly into the outer section of the chamber formed by the frame b1, and support H, from which it is conducted by the wings or blades g, through the screen d', into the chamber d5. The

coarser particles of the descending matter owing to their weight and in the absence of any obstruction, will not be sufficiently iniiuenced as to be drawn into the outer section of the frame b1, nevertheless, the same will be deflected sufficiently in a radial direction to descend in an obliquecourse which leads the matter to. the grinding ring e2. In this movement, the matter will be assisted by the grinding balls c1, producing a current of air, which will be directed against the ring c2.

Having thus described the nature and ob-l vintermediate of the blades or wings of the other series and the arrangement being such as to elevate matter from the grinding means of the mill into said central chamber to force thereby finely ground material from said grinding means through the screen of said frame into -said outer chamber and therefrom into said discharge ducts and to permit the coarser or partially ground material to fall by gravity back into the path of the grinding means of said mill.

2. In a pulverizing or grinding mill, a cas'- ing, a grinding ring arranged in said casing, a frame having openings carried by said casg, a screen surrounding said`frame, said casing and frame formin a central chamber, a shaft, a carrier mounte on said shaft, arms supported by said carrier, rings carried by said arms, wings or blades carried by said rings, grinding balls supported by said carrier 'and held by the same opposite said grinding ring, said shaft, when rotated, adapted to actuate said carrier and by the same to rotate said balls within said ring to grind material fed thereto, said arms and rings arranged to form a skeleton frame within said central chamber and adapted to permit of free descent of material to be ground through said rings and between said arms, and said wings or blades, when 'rotated, adapted to elevate ground material from said balls and ring and force the same through the screen of said frame.

In testimony whereof, I have hereunto sety JAMES w. FULLER, JR.

Vitnesses:

A. J. KOPP, GEORGE KOPP.

IOIO

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