US324664A - cumming-s - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1. U. CUMMINGS.

ORE URUSHER. No. 324,664. Patented Aug. 18, 1885.

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(No Model.) 3 Sheets-Sheet 2'. U. CUMMINGS.

ORE GRUSHER.

No. 324,664. Patented Aug. 18, 1885.,

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3 Sheets-Sheet 3. U. CUMMINGS.

ORE ORUSHER.

(No Model.)

Patented Aug. 18, 1885.

NITED STATES PATENT OFFICE.

URIAH CUMMINGS, or BUFFALO, NEW YonK.

ORE-CRUSH ER.

SPECIFICATION forming part of Letters Patent No. 324,664, dated August 18, 1885.

' Application filed November 11, 1891. (No model.)

To all whom it may concern;

Be it known that I, URIAH CUMMINGS, of the city of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvement-s in Ore Crushers, of which the following is a specification.

This invention relates to an improvement in that class of orecrushers which consist of a rotating pan or bed-plate and crushing'rollers bearing upon such pan or bed-plate, and which are provided with an annular screen surrounding the bed-plate.

The object of my invention is to improve the construction of the pan and sifter.

My invention consists, to these ends, of the improvements which will be hereinafter fully set forth,and pointed out in the claims.

In the accompanying drawings, consisting of three sheets, Figure l is a partly sectional elevation of my improved ore-crusher. Fig.2 is a sectional top plan view of the same. Fig. 3 is an end elevation thereof. Fig. 4 is a fragmentary sectional elevation, on an enlarged scale, of the pan and one of the crushingrollers. Fig. 5 is a fragmentary top plan View of the pan. Fig. 6 is a horizontal section in line 00 as, Fig. 5. Fig. 7 isa perspective view of two of the bars of the annular sifter. Fig. 8 is a sectional elevation, on an enlarged scale, of one of the roller-bearings.

Like letters of reference refer to like parts in the several figures.

A represents'the sills or bed-pieces of the stationary frame of the machine, A the upright posts resting thereon, and A horizontal pieces connecting the upper ends of theposts A.

B represents the rotating pan or bed-plate, secured in the usual manner to the upright shaft 1), which is provided at its lower end with a step, b, resting in a bearing, b secured to the bedsills A. I) is a bearing supporting the upper end of the shaft b,,and attached to a cross piece, b connecting the horizontal top pieces, A.

O 0 represent the two crushing-rollers, arranged on diametrically-opposite sides of the vertical shaft 1), so as to bear upon the bedplate B. The latter is composed of a suitable number of sections-four being shown in the drawingswhich are provided on their under sides with radial ribs or flanges (Z, secured together by screw-bolts, and forming at the center a hub, d, which rests upon a collar, d", which is secured to the shaft b, and whereby the bed.

plate is supported. The flanges d serve to stiffen the bed-plate and permit a lighter plate to be used without sacrificing strength; and as the bed-plate is made in sections, each section can be readily renewed if a breakage occurs, thereby avoiding the necessity of replacing the entire bed-p1ate,which is the casein bed-plates cast in one piece, as they are usually made.

6 are radial arms secured with their inner ends to the under side of the bed-plate B, and extending outwardly therefrom for the purpose of supporting the annular sifter E, which surrounds the bed-plate.

e are recessed segmental frames resting on the arms 6 and the bed-plate B.

f are radial bars resting on the frames 0, and constituting a grate, through which the material which has been reduced to the proper degree of fineness passes, while the coarse fragments remain on the grate. The bars f are tapered lengthwise and provided at their ends with lateral projections f, whereby the bodies of the bars are kept at the proper distance apart to form intervening slots of uniform width. As the bars are also tapering in cross-section in such manner that the openings between the bars flare downwardly, in order to facilitate the discharge of the material, the wearing away of the upper surface of the bars causes in course of time an enlargement of the openings, which affects the separation. In order to reduce these openings to the proper width when such wear has occurred, it is only necessary to grind off the projections f, whereby the bars will be brought closer together.

Heretofore the annular sifter or screen has been composed of perforated plates, each of whichwas cast in one piece. When these plates become worn to such an extent as to enlarge the slots or perforations in the same, they have to be removed and replaced by new plates, which involves considerable expense and loss of time. All of this is avoided in my improved construction.

The bars f are preferably chilled on their upper or face sides, and will therefore last a long time without requiring any adj ustment,

and if they are adj usted more closely together the open spaces formed in the frames e, are filled with an additional bar or a simple strip of metal.

G is a hoop or cylindrical rim secured to the outer ends of the arms 6, for the purpose of confining the material on the sifter E.

g is a gear-rim secured to the outer side of the hoop G, and h is a gear-pinion which meshes with the teeth of the rim 9 and rotates the latter. The pinion h is secured to the inner end of a horizontal shaft, 11-, which is providedwith a driving-pulley, H. The rim g is composed of'segments, in order to facilitate the operations of casting and securing it in place.

i represents the vertical scraper-plates,

which are arranged above the bed-plate B and l screen E, and whereby the coarse material which has not passed through the screen is brought within reach of the rollers.

The rollers C O are secured to two disconnected independent horizontal shafts, jj, each of which is supported in two independent bearings, 70, which are capable of vertical movement in grooves or ways it, formed'in horizontal pieces K on both sides of each roller. The pieces K are secured between horizontal pieces K, which co'nnectthe posts A.

Z represents springs, which press upon the roller-bearings and tend to hold the rollers down upon the bed-plate- Z represents set-screws working in bridgepieces 1 secured to the horizontal pieces K, and bearing upon followers m, which embrace the upper ends of the springs I, so that by adjusting the set-screws Z the tension of the springs and the pressure which they exert upon the rollers can be increased or lessened as may be desired.

The material is fed upon the bed-plateB by a spout, which receives the material from the preliminary cracker or disintegrator, when such a device is used, and the ground material, which passes through the screen E, falls upon the tight bottom 0, and is removed there from and delivered into the discharge-spout 0 by scrapers 0, which are attached to the lower side of the pan.

My machine is especially designed for grinding cement; but it may also be used advantageously for grinding lime, plaster, phos- .phates, ores, and other hard'substances.

. 1 claim as my invention- 1. 'In a crushing-machine, a circular pan provided with an annular screen surrounding the bed-plate, and composed of detachable bars tapering lengthwise and arranged radially side by side, substantially as set forth.

2. In a crushing-machine, a circular pan provided with an annular screen surrounding 4. Thecombination, with the bed-plate B,

composed of sections provided on their under sides with ribs d, of arms e, extending outwardly from the bed-plate, frames 0, and screen-bars f, resting on said frames, substantially as set forth.

itness my hand this 8th day of November, 1884.

U. CUMMINGS.

VVi tn esscs:

J NO. J. BONNER, CARL F. GEYER.

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