US922468A - Pulverizing or grinding mill. - Google Patents

Description

J. W. FULLER, JR. PULV'BRIZING 0R GRINDING MILL.

APPLICATION FILED AUG. 22, 1907.

922,468. Paten ed May 25, 1909.

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J. W. FULLER, JR. PULVERIZING 0R GRINDING MILL.

APPLICAIION TILED AUG. 22, 1907.

Patented May 25, 1909.

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

PULVERIZING OR GRINDING MILL.

Specification of Letters Patent.

Patented. May 25, 1909.

Application filed. August 22, 1907. Serial No. 389,646.

To all whom it may concern:

Be it known that 1, JAMES W. FULLER, J12, a citizen of the United States, residing at Catasauqua, in the county of Lehigh and State of Pennsylvania, have invented certain new and useful Improvements in Pulverizin g or Grinding Mills, of which the following is a specification.

My invention has relation to a pulverizing or grinding mill; and in such connection it relates particularly to the constructive arrangement of the mill as hereinafter more fully described and then claimed.

The nature and characteristic features 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 projec tion supporting the grinding balls and forming in conjunction with the bottom of the casing a chamber, a yoke having a substantially conical-shaped body p ortion supporting pushers for the grinding balls and rings for carrying the wings. Fig. 2 is a view, illustrating partly in longitudinal section and partly in top or plan, the yoke for carrying pushers having a bearing for the balls and a curved face forming in conjunction with the balls and ring a chamber to facilitate the entrance of materials to be ground into the path of the balls and exit of ground matter from the ring; and Fig. 3 is a detail view illustrating in section a portion of the mill and arrangement of bolting and protecting screens therein.

Referring to the drawings 4, represents the bed-plate of the pulverizing or grinding mill to which is secured a standard 5, supporting the lower portion 7 of the sectional casing 6, the bottom 8 of which in conjunction with the bottom 9, of the casing 6 forms a discharge chamber 11, for ground material. Within the casing 6, and upon the bottom 9 thereof, is arranged the grinding-ring 12, which is provided with a laterally inwardly extending projection 14, of sufficient width, to support the grinding balls 16 and to form the continuation of a grinding surface 15, of the ring 12, which terminates in a straight portion 18, slightly projecting over the upper portion of the grinding surface 15. The ring 12, is held in position on the bottom 9, preferably by an annular rib engaging a depression 56, arranged in the bottom 9, and by a similar rib 58, engaging a depression 60, in the frame 21. The turning of the ring 12, between the bottom 9 and frame 21, is prevented by lugs 61, engaging lugs 62 of the casing 6. Beyond the ring 12, the bottom 9, is provided with a substantially conical portion 10, which in conjunction with the straight lower portion 19, of the ring 12, forms an annular chamber 20, for a purpose to be presently more fully described.

Upon the casing 6, is arranged a frame or basket 21, adapted to support an outer fine or bolting screen 22, and coarse inner or protecting screens preferably, consisting of perforated metal plates 23. Outside the screens 22 and 23, the basket 21, supports a casing or shell 24, which in conjunction with the screens forms a receiving chamber 25, for ground materials which by means of ducts 26, arranged in the frame 21, semi-circular passages 53 formed by the grinding-ring 12 casing 6, lugs 61 and 62, and ducts 54 in the bottom 9, thereof is connected with the discharge chamber 11. The frame or basket 21, is closed at its u per end by a ring 28, and a plate 29, removiibly secured thereto, and upon this plate is arranged a bearing 30, for the driving-shaft 31, arranged vertically and centrally in the mill. The shaft 31, passes through the plate 29, and the upper and lower bottoms S and 9 of the sectional casing 6, and terminates in a bearing 32, arranged on the bed-plate 4. Between the lower bottom 8, and bed-plate 4, the shaft 31, is provided with a pulley 33, by means of which the shaft is driven from any suitable source of power, not shown. ithin the dischargechamber 11, the shaft 31, serves to support a sweeper 34, the peripheral inclined portion 35, of which terminates opposite discharge ports 36, arranged in the portion 7, of the sectional casing 6.

To the shaft 31, within the casing 6, is removably secured a yoke or frame 37, hav ing a centrally substantially conical-shaped body portion 38, from the lower portion of which radiates arms 39, supporting pushers 40, between which the balls 16, are arranged and are revolved on the ring 12. Each of the pushers 40, consists of a substantial segmental body, provided with an outwardly flaring and indented active or bearing face 41, against which the ball 16, abuts, during its actuation by the pusher, and with an inactive straight and preferably slightly curved face 42, which in conjunction with the adjoining ball 16, forms an opening 43, to facilitate entrance of unground materials by the conical portion 38, of the yoke 37 into the path of the grinding balls 16, as well as exit of ground matter from the balls 16 and ring 12, by means of Wings, hereinafter more fully described. From the conical portion 38, of the yoke or frame 37, radiate a second series of arms 44, which serve to limit the upward movement of the balls 16, and by means of vertically arranged extensions 47, also support a ring 45, to which are secured a series of wings 48, arranged obliquely with respect to the ring 45. By extensions or distance-pieces 46, the ring 45, supports a second ring 49, to which are secured a second series of wings 50, likewise obliquely arranged with respect to their supporting ring 49. These Wings 50, are arranged intermediate of the lower wings 48, and when both series of wings are set in rotation by means of the rings 45 and 49, yoke 37, and shaft 31, the lower series 48, rotating directly above the balls 16 and ring 12 lift the ground materials from the ring 12, aided in this action by the openings 43, between the balls and pushers. The lower series of wings 48, conduct the ground materials into the path of the upper series of wings 50, which checks and deflects then sidewise the uplifted ground materials under force against and through the screens 22 and 23. The ground materials of sufficient fineness readily pass the outer or bolting screen 22, and reach the receiving chamber 25, from which the same passes through the ducts 26, passageways 53, and ducts 54, into the discharge chamber 11, and onto the sweeper 34, thereof, which latter conducts the material into the discharge ports 36, of the lower portion 7, of the casing 6.

Ground matter which does not pass through the bolting screen 22, drops back onto the portion 14, of the ring 12, into the path of the balls 16, as well as material to be ground, which is introduced into the mill through the opening 51, arranged in the plate 29. This opening 51, is so located as to permit of the descent of the material to be ground through the wings 48 and 50, and rings 45 and 49, directly onto the conical portion 38, of the yoke 37, which conducts the same onto the projection 14, and grinding surface 15, of the ring 12, and into'the path of the balls 16. Foreign matter, such for instance, as metal objects entering the mill with the material to be ground, are removed by the balls 16, from the ring 12, into the collecting chamber 20, away from the balls 16 and ring 12. The chamber 20, although it may be filled with ground matter it will permit any metal objects by their greater weight to embed in the ground matter and thus held by the same without in the least interfering with the proper entrance of matter to be ground to the grinding ring 12.

As the balls 16, are arranged in proximity to the conical portion 10, of the bottom 9, of the casing 6, and to the yoke 37 the space 52, provided for the reception of material to be ground and of the ground matter is so small as to prevent any considerable accumulation of the same at the bottom 9, of the casing 6. Moreover the distance from the projection 14, of the ring 12, supporting the balls 16, to the lower series of wings 48, is reduced to such an extent as to permit of a most effective suction action of the wings on the ground material, aided by the reduction in size of the receiving space 52, for the materials which is thus quickly and effectively removed and elevated into the path of the upper series of wings 50, which force the ground matter against the screens 22 and 23, unhampered by the materials to be ground descending through the central upper portion of the mill.

Having thus described the nature and objects of my invention what I claim as new and desire to secure by Letters Patent is In a pulverizing or grinding mill, a yoke having a base, a grinding ring locked to the base of said yoke, said ring and yoke together forming a chamber to collect foreign matter, and grinding balls, the base of said ring forming the support for said grinding balls and said combined constructive arrangement, as such, facilitating entrance of material to and from said balls, revolving within said chamber, substantially as 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.

Witnesses GEORGE Korr, FERD HEIMPEL.

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