US1420354A - Crusher and pulverizer - Google Patents

Description

.15 rial passing into the grinding-cliamber and U-Nrren 'sra Tas PATENT carica MILTON F.; WILLIAMS, OF ST. LOUIS, MISSOURI, 'ASSIGNOR TO WILLIAMS PATENT 'CRUSI-IER & PULVERIZER COMPANY, YOF ST. LOUIS, MISSOURI, A CORPORATION j or MISSOURI.

`To all ywhomvt muy concern.' Be it known that I, MILTON F .-lViLLiAiwis,

a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Crushers and Pulverizers, of which the fol-` lowing is aspecification.

This invention relates to'certain new and useful improvements in Crushers and pulverizers, the peculiarities of which will be hereinafter fullyfdescribed and claimed.

The main object'of my invention "is to provide an arcuate cage having a series of driven off tangentially from the ends of the rharniners, will be y divertedv from said tangential directionito'practically a radialA direction Overrenewable cutting edges of relatively harder material andl thus transversely to the hammer-circle-which is in close proximity to said cutting edges,-and as the material successively passes .from cove to covearound the cage, and is returned again and again by said coves into the path of the hammers it is successively reduced upon the sliarpedges ofthe cage coves in conjunction with said hammers; and second to graduate the size of the renewable pieces of said cove serrations in diminishing ratio in the direction of rotation of the rotor to accord with the successive liieness of the material being reduced. g

In the accompanying drawing on whichv like reference letters indicate corresponding parts, Fig. V1 represents a vertical sectional elevation across the shaft of-'amachine exem-` phfying my invention; and F1g.'2 a sec-'- tional perspective view of a portion of my cove serrated cage.

The letter A designates a rotorshaft, and- B hammers preferably pivoted on discs C or other suitable hammer mounts. suitable casing D is provided with a hopper E above the rotor chamber, and a suitable metal catcher F of thesawftooth or other variety is mounted on .the casing adjacentto the Y hopper.`

Mounted in the casing preferably con-` centricfwith rotor, is a cage extending more or less around on the inside of the grinding chamber and provided with series of cove serrations on its inner face,each cove having a plane surface G-tangentto the hammer-'circle or substantially so, and also hav-- CRUSHER AND PUL VERIZER.

from the hammer circle.

Specification of Letters Patent. Patented June `2O, 1922, Application filed October 28; 1921. Serial No.*511,0'3. l

ing. a plane 'surface HA substantially radial -to theirotor shaft and these planes connected by a curved surface I set back away This curved surface thus located intermediately of the laiteral surface on both sides lof it and thus lalternating with the cuttingfedges, acts to deflect the material driven off tangentially from the ends ofA the hammers, 'and'divert such material back again into the rotor `chamber in a substantially radial' plane as the material lea-ves the cove and into the path of the hammers traveling in close proximity. lThe radial-plane surface H in each cove intersects the adjacent tangent plane surface Gr of the next cove in a sharp cut- Ating edge which I have preferabl;v provided with a cutting piece of relatively harder material inserted at said intersection so as to forma renewable cutting edge. This in- .sert piece may be of two legs J`-J havingV intersecting surfaces meeting in an acute angle lforming a cutting edge. One of the legs J ,is held in position by fastening means such as screws K or otherwise, as shown in Fig. 2. One leg lies in a recess back of said tangential plane surfaceof a cove and the other leg J fits in a radial slot at the end of the cove so that only a portion. of it near the sharp edge blends with the curved plane `-surface I that overlapsthe radial surface and that deflects the material across the cutting edge into the path ofthe hammers.

Referring to Fig. 1 it will be seen that the cove serrations gradually diminish in size in the direction of rotation so as to correspond to the iineness of the material being reduced; that is to say, the material entering the chamber is comparatively coarse and is metv by the hammers which drive it into comparativelyvlarge coves which reduce it,"

and as it passes from cove to cove and across y successive cutting edgesA itis repeatedly reducedtogreater fineness. The cage with cove serrations is followed byl a cage of perforated metal L and a screen wire cage M; of-suitablesize to take care of the ma. terial ground fine enough to be vdischarged through .the openings. Any material not passing through these openings orvotherwise discharged Afrom the rotor chamber, is carried upward by thev hammers and further ground upon the upper portion ,of the cage which is mounted in the cover 'of the casing. Cove serrations of similar forms to those of above described but preferably somewhat finer than those next to the discharge cage, are formed on the inner Jface of this upper cage portion-Which is preferably hinged at near the hammer circle and horizontal plane through the. shaft, and is adjustable at the opposite end by any suitable 111eans,-such as a bolt Oy extending through the cover and having a head engaging the upper end 'of this cage portion to pull it outward. while another bolt l threaded into the cover acts compressively'on the said end of the cage portion. Jam nuts are preferably provided on said bolts.

Another portion of the cage having cove serrations mayV be adjustable by mounting it on Va slidable block Q operated by an adjusting bolt S, so that said cage portion carried by said sliding block, can be adjustedA to andfrom the hammer circle.

l. In a pulverizer or disintegrator7 the combination 'with a rotor, of a casing disposedl eccentrically with respect thereto whereby to provide a gradually diminishing space between said rotor and said casing, said casing having a series of reentrant angies of gradually diminishing depths disposed around the face of the casing, said angles having rounded bottomsand the shorter side of said angles extending radially of the rotor.

i 2. The combination as in claim l, further characterized by a removable angular` impinging member disposed along each of the .ribs formed by the intersection of the short and long sides of the adjacent angles.

3. Thecombination as in claim l, further characterized by a series of removable angular iinpinging members of gradually decreasing sides disposed along the ribs formed by the intersection 'of the short and long sides of adjacent angles, said ribs having cut-outs to form seats for said members.

In testimony whereof I have aiiixed my signa-ture.

MILTON F. WILLIAMS.

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