US888077A - Pulverizing or grinding mill. - Google Patents

Description

No. 888,077. PATENTED MAY 19, 1908. J. W. FULLER, JR. PULVERIZING OR GRINDING MILL.

APPLICATION FILED AUG. 22, 1907.

2 SHEETS-SHEET 2.

,4 TTORNEY.

JAMES W. FULLER, JR, OF CATASAUQUA, PENNSYLVANIA.

PULVERIZING OR GRINDING MILL.

Specification of Letters Patent.

Patented May 19, 1908.

Application filed August 22, 1907. Serial No. 389,645.

To all .whom it may concern:

Be it known that 1, JAMES W. FULLER, Jr., a citizen of the United States, residing at Catasauqua, in the county of Lehigh and State of Pennsylvania, have invented certain new and useful 1m rovements in Pulverizing ,or Grinding Mil s, of which the following is a s ecification.

My invention has relation to a pulverizing or grinding mill of the type in which the materials are ground by balls traveling Within an annulus or ring; and in such connection it relates particularly to the constructive arrangement of the working parts of the mill, in which the matter to be ground is fed directly onto a revolving cone-shape device and therefrom by gravity through the revolution of the device directly onto balls su ported by a ring or annulus having a latera extension and forming the runway therefor and which balls are actuated by pushers revolved by said device so that materials to be ground pass directly by the action of said balls against the ring onto a revolving sweeper located beneath and caught and delivered thereby into the discharge ports of the mill, to effect as practice has demonstrated, a decided saving of power as well as conditioning of the materials for further treatment by said direct feed and sup ly of the materials to the grinding means om the feed and of a nick liberation of the ground matter there roni through the discharge ports of the mill' The nature and scope of my invention will be more fully understood from the following description taken in connection with the accompanying drawings forming part hereof, in which Figure 1 is a view, illustrating partly in vertical central section and partly in elevation, a pulverizing or grinding mill, a grinding ring having a laterally extending projection supporting the grinding balls, a spider or frame carrying pushers for rotating the balls within the ring, a cone carried by the ipider at a certain distance above the ring an balls and terminating a certain distance from the interior or the grinding surface of the ring, and a sweeper arranged below the ring. Fig. 2 is a view illustrating partly in horizontal section and partly in top or plan, the cone, the grinding ring and grinding balls, the pushers for the balls, and the spider-frame for supporting the pushers and cone; and Fig. 3 is a view illustrating the underside of the cone and the means for removably connecting the same with the spider-frame.

Referring to the drawings 4, represents the bed-plate of the pulverizing or grinding mill to which is secured a standard 5, supporting the bottom 7, of a sectional casing 6. Upon the casing 6, is arranged a second casing 8, of a diameter less than the casing 6, and closed at the upper end by a removable'plate 9, carrying a bearing 10, for a driving shaft 11, and a feeding device 12, for materials to be ground. These materials enter the casing 8, through an opening 14, arranged in the plate 9. In addition to the opening 14 the plate 9, is provided with a second opening 15, through which materials may be introduced into the casing 8, of a size which=cannot pass through the opening 14. ,The shaft 11, passes through thecasings 6 and 8, and between the casing 6 and the bed-plate 4, is arranged a pulley 16, by means of which the shaft 11, is driven from any suitable source of power, not shown. The casing 6, is provided with a laterally projecting annular ledge 18, serving as a support for an annulus or grinding ring 19, which is held in position on the ledge 18, preferably by an annular rib 20, engaging a groove 21, arranged in the ledge 18. At the upper face the ring 19, is provided with an annular rib 22, engaging a groove 23, arranged in the casing 8. The ring 19, is thus securely held in position by the casings 6 and 8, and is prevented from turning between the same by a projection 43, of the ring engaging a projection of thecasing 6, as shown in Fig. 2. provided with a laterally and inwardly extending projection 24, of sufficient width to support the grinding balls 28', and to form the continuation of the grinding surface 25, of the ring 19, which terminates in a projecting straight portion 26.

Secured to the shaft 11, held directly below the grinding-ring 19, and extending beyond the projecting portion 24, of the same, is arranged a swee er 29, having a centrally arranged conica portion terminating in a straight ortion which conical and straight ortions in conjunction with the downwardly inclined ortion 30, is preferablyheldin alinemerit wit discharge ports 31, arranged in the lower portion of the sectional casing 6, forms a sweeper step-like in outline. In addition to the sweeper 29, to the shaft 11 is secured a The ring19, is likewise y the casing 8, through one or both openings 14 grinding-balls 23, and grinding-ring 19, as

spidenframe 32 annular in cross-section at its lower portion, which portion is of a diameter to permit of a certain movement of the balls 28, on the runway 24', of the ring 19, in a radial direction. Moreover, this portion of the frame 32, limitsthe range of movement of the balls 28, towards the shaft 11, and also prevents the dropping of the balls from the runway 24, when forced backwards by ma-' terial passing between the grinding n'ng and balls. The arms 33 of the frame 32, serve to support pushers 3 1, which rotate the grinding-balls 28, on the grinding-ring 29, while arms 35 thereof, support a cone 36, in a position slightly above the grinding-balls 23, and grinding-ring 19. The diameter of the cone 36, at the lower end is slightly less than the diameter of the ring 19, between the straight portion 26 thereof, thus forming in conjunction with the portion 26, of the ring 19, an annular inlet 38, for materials to be ground, which are prevented from falling directly onto the sweeper 29, by the 1projection 24, (if the ring 19. The materia s which enter and 15, in the plate 9, drop directly onto the cone 36, which conducts the same between the Well as dropping the materials onto the projeotion 24, of the ring 19, in the path of the balls. That portion of the materials which drop directly between the balls and the rinding-ring will be quickly crushed by the calls aided in this action by centrifugal force tending to hold the balls against the grinding portion 25, of the ring 19. The portion of the material dropping onto the rogection 2 1, of the ring 19, in the path of t e balls 23, will which in this action are aided by the weight of the same. The crushed materials of sufficient fineness are removed from the projection 2 1, of the ring 19, by the balls traveling on the projection, and drop directly onto the conical shaped central portion of the sweeper 29,Whichinconjunctionwith thestraight portion forming the continuation of the central conical portion and the inclined portion 30,, facilitates the conduct of the materials into and throu h the dischargeports 31, of the casing 6, cm which the same enters isc'harge spouts 40. By this arrangementof seem? the cone 36 and ring 19, the materials pass directly through the mill in a substantially vertical plane, and are crushed in their passage and before reaching the sweeper 29, and

discharge-port 31. The t me required for the materials to pass through themill is thus greatly reduced. Due to the-arrangement of the cone 36, the casing 8, and rinding-ring 19, materials forced upward hy the balls through the space 38, formed by the cone 36, and ring 19, will always be returned to the balls and ring, while centrifugal force will hold the material on the rin 19, until removed therefrom in a groun condition by the balls 28. As the grade of fineness of the ground materials cannot be controlled with accuracy in this type of mill the same is especially adapted to grind, reduce or crush materials to such adegree as to greatly facilitate their further reduction to the required'fineness in another mill. This mill may therefore, be termed a preliminary rinding mill.

In order to permit of the ready removal of the cone 36, from the spider-frame 32, the same at its undersideis provided with ledges or angle irons 12, which engage the arms 35,

of the frame 32, from opposite sides and thus hold the cone 36, securely yet loosely in posi-- tion, on the frame 32.

' Having thus described the nature and objects of my invention what I claim as new and desire to secure by LettersPatent is A pulverizing or grinding mill provided with a spider-frame having two series of supporting arms, a conical material distributing device supported by one series of said arms, pushers carried by the other series of said arms, a grinding ring 'supportin balls between said pushers, a sweeper, a s aft carrying said sweeper and spider-frame and actuating the same and means for removably connectlng said conical device with said supporting arms, substantiallyas and for the purposes described.

In witness whereof, I have hereunto set my signature in the presence of two subscribing witnesses.

JAMES w. FULLER, JR.

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