US1424225A - Coved pivoted hammer - Google Patents

Description

M. F. WILLIAMS.

GOVED PIVOTED HAMMER.

APPLICATION FILED FEB,25,1922.

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application filed February 25, W22. serial do. 5%,083.

To all whom it may concern Be it known that I, MILTON l mums, a citizen of the United States, residing at St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Coved Pivoted Hammers, of which the following is a specification. a

This invention relates to certain new and useful improvements in coved pivoted hammers, the peculiarities of which will be hereinafter fully described and claimed.

The main object of my invention is the provision of a coved pivoted hammer, preferably of the the stirrup kind, having a cutting edge wmbined with a curved deflecting surface adapted to throw the material being reduced forward and outward again into the path of the hammer, so that the large particles are again subject to reduction beform of cross bar tion of rotation of tween the cage and the said cutting edge, while the finer particles pass out t rough the cage; secondly,.to provide an adjustablecutting edge in connection with said deflecting surface; thirdly to provide an adjustable reversible plate, adapted to form a cutting edge and deflecting surface in either position; and rourthly, to provide an adjustable cutter-bars in the-cover adapted to co-opcrate with said coved pivoted hammer.

In the-accompanying drawing on which like reference letter indicate corresponding parts, Fig. i represents a vertical sectional elevation across the rotor shaft of a machine exemplifying my invention,the section being taken just inside the side housing of the machine; Fig. 2, an enlarged detail face view of my coved pivoted hammer in the stirrup head and spaced shanks; across section on the lineEZ-Q or Fig. t, a similar detail face view of my adjustale cutter bar in the cover; and Fig. 5, an end view of the same. Y

The letter A designates a rotor shaft mounted in a casing l3 having a hopper G with regulating slide D, and breaker plate E. The shaft A is provided with discs F having rods G on which are pivotally mounted shanks H of pivoted hammers by means of holes at th ir inner ends,said rods being eccentric and parallel to the shaft A.

Fig. 3,

The outer ends ofthe shanks are connected by a cross bar head '1 which is concavely curved at the front-with regard to the directhe hammers as indicated by the hammer circle Fig. 1, and with the outer edge of said head locatedsubstantially in the radial lane R through the plvotal axis X of the hammers and center of the shaft d, and the inner edge located nearer the plvotal axis and forward of said plane R so that the said head is inclined with the concave towards the front. The shanks H are spaced apart substantially the'width of the casing B and on the head is adjustably mounted a similarly curved plate d, preferably curved cylindrically and somewhat more than a halt circle, having its lateral edges K K beveled or otherwise sharpened. One edge, K for instance Fig. 3, is located substantially in radial plane R when in operation and furthest from the pivotal axis, to formthe operative cutting edge. The other edge, K for instance, is located in front of the radial plane R and is bent so much further outward radially than a portion of the connecting intermediate surface of said plate that is nearer to the pivotal axis than the forward edge K,

that this forward projecting edge gives an outward flip to the larger particles of the material being reduced after being deflected upward and inward and outward again over the forward edge K, and'against the cage L concentric with the rotor shaft, as indicated in Fig. 1. The liner particles pass out through said openings in cage. The larger particles are again subject to reduction by the cutting edge K in connection with the cage till they are fine enough to. pass through the cage.

The forward side edge K extends so much further outward radially from the pivot axis than the intermediate portion of the deep cove between the lateral edges, that the forward edge give a decided flip outward to the material deflected from the cutting edge around the cove plate to the said forward edge K. This forward edge likewise serves to guard the deep cove between the lateral edges, from the surplus material not passing under the forward edge to be acted on the cut ting edge'K as described. The surplus material therefore passes over the cross bar head to be engaged by the following hammer and either driven around dicated by the arrows in assing inward over the cross bar head to a following her or hammers. j

The plate I is preferably reversible so that either the edge or K may be located subin the deep cove as in Fig. 1, or again specification of Letters Patent. P$Lt@m$@fl A 1 319%% Mill stantiall in the radial plane R, and the the said head and 'cage. edge with regard to the cage is thus obtainother ge become the forward edge over which is deflected the coarser articles before mentioned. Any suitab e fastening means may be used to connect'the said plate adjustablj; to the head I, such as bolts M passing t rough holes in the center line of the plate and thro htransverse slots 0 in aving nuts P on their outer ends to hold the plate in any adjusted osition or reversed position on-said head.

n account of the curved shape of the plate,

the outer cutting edge when adjusted later- I ally as indicated by dashed lines in F i 3, will project slightly in front of the p ane R, and a further radial distance from the pivotal axisxof the hammer and therefore closerto the inner surfaceof the cage, when adjusted laterally outward as indicated in Fig. 3. Under the reaction of the coarser particles of the material being deflected, the outer cutting edge will normally recede so that it lies substantially in the radial plane R when operating, and further backward movement will cause it to recede from the A close adjustment of the operative able.

forward portions of the materlal being reduced, and I provide in the casing cover B a series of cutter bars Q mounted on radial faces of projections S projecting inward from the cover B. These cutter bars are beveled on their lateral edges and have holes in which are mounted the hook ends of hook bolts T that pass to the outside of the cover and are provided with nuts by which the cutter bars are adjusted against filler strips U so that the inner edge of each bar is close to the hammer circle, and. the bar may be reversed to bring the other edge into operative position; As the material is carried by, and thrown outward against As indicated in Fig. 1, this coved form of hammer is adapted to pick up and carry these cutter bars by the cove hammers, a further reduction occurs.

I claim:

1.'A rotary pivoted hammer com risin shanks s aced apart and provid wit holes at t eir inner ends for pivotal mounting, and a cross bar head connecting the outer ends. of said shanks and curved con- 2. A rotary pivoted hammer comprising a, pair of spaced shanks having holes in their inner ends for pivotal mounting, and a cross bar head connecting the inner ends of said shanks and concavely curved towards the front and having transverse slots, a, similarly curved adjustable plate having a beveled lateral. ed e mounted on saidhead and having bolt oles' matching said slots, bolts passing through said holes and slots to the rear of said head, and nuts.

on said bolts, substantially as shown and described.

3. In a machine of the character described the combination with a casing, cutter. bars radially adjustable in said casing, and means for adjusting said bars radially, of cutters co-acting with said cutter bars and consisting of rotary heads provided with surfaces curved concavelyforward into coves adapted to pick up the material being reduced and carry it lupward and further reduce it on said cutter ars.

In testimony whereof I have afiixed my signature.

MILTON r. WILLIAMS.

pivoted hammers having 7

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