US97989A - Improvement in bark-mills - Google Patents

Description

N iltttrd gratte prima )pitre WILLIAM TANSLEY, OF SALISBURY CENTRE, ASSIGNOR TO STARBUOK BROTHERS, OF TROY, NEW YORK.

` Letters Patent No. 97,989, dated December 14, 1869.

IMPROVEMENT IN BARR-MILLS.

... awww The Schedule referred to in these Letters Patent and making part of the same T0 au Whom t ma?! Concern: The base of the lower cone is provided with arms 'Beit known that I, VILLIAM TANSLEY, of Salis- G, G, Ste., merging at the centre, and forming a bearbury Centre, in the county of Herkimer, and State of ing, through which the shaft B passes, andprojecting New York, have invented certain new and useful Imdownward a short distance, forming stops, against provements in Bark-Mills; Vand do hereby declare the which the driver J comes in contact, as will be presfollowing to be` a full, clear, and exact description ently explained, and extending upward a short dis thereof, reference being had to the accompanying tance, and forming a ring, K, which fits into the holdrawings, makng'part of this specification, and `,in low bearing Lof the core M. whichl -The shait B passes up through the shoulders of the Figure lis a side elevation of my improved mill; arms a, (which are secured to the lower side of the Figure 2, a vertical section through the centre of curb, at the ears c, and support the same. in a xed the same; position,) through the ring K, and up through the Figure 3, a top view of the same; centre ot the core M, and is provided with a suitable Figure 4, a side view of the runner and shaft; and bark-breaker, O, which is secured to the shaft by Figure 5, a central vertical section ofthe runner. means of a feather.

The object of my improved mill is to so arrange the To the lower part of the shaft B, and the proper l grinders or graters on both the revolving and station distance from the end, is cast, or otherwise secured aryparts of the mill, one above the other, that the thereon, a driver, J, which, when the shaft is in posihark, coarsely ground bythe upper', is discharged dition, is interlocked between the shoulders H of the rect-ly into the lower grinding-surfaces, where it is rearms G, so that the rotation ofthe said shaft produces ground to the requisite neness, and more evenly a similar movement of the runner F.

than has heretofore been done, wherethe bark re- The ring'or annular journal K, tting up into the quired rehandling before being inished. central hollow bearing L, keeps the stationary and To enable those skilled` in the art to make and use revolving parts true, one with the other. my improved mill, I will proceed to describe the same, A hopper may be attached to the top of the curb, referring byletters to the drawings, ,similar letters deto the ears c, by means oi' bolts. noting likeparts in the several views. The formation of the steps, on the apex of the up- A represents the curb of the mill, provided at to per cone of the runner hereinbefore mentioned, proand bottom with earsc, for the purpose presently exvides grippers, which, when `the runner is in motion,

plained. grasp the bark, and drag it into the space between the This curb has what I willl designate a core, M, and grinding-surfaces, and force it down. i the interior face of the curb proper and exterior face I am aware that bark-mills have been `heretofore of the core are serrated, or provided with grindingconstructed with `concentric conical rings, forming an l teeth, in Vtwo sets, the faces being divided longitudiinside and outside or double grindiiig-surface.` nally, the upper set O being coarse, andthe lower' one, I am also aware that mills have been made, having I), tine; `the teeth of the former having a pitch of one runner above another, each runner acting indeabout one inch and aneighth, and the latter, a pitch pendently of, and discharging its grindings at a dilferof' about ahalf inch. ent outlet from the other. I do not wish to claim The core M is held in position, and leaving an anany of these features; but having described the connular space between it and the iiiterior face of the struction and operation of my improved mill,

curb proper, by means ot' arms E. IVhat I claim as new, and desire to secure by Let# .The coreis hollow, and has arranged therein centers Patent, isl trally a hollow bearing, L, for the purpose hereinafter 1. Constructing the upper conical ring of the runspecified. i ner with a series of steps, supported on a continuous l y F is the runner, formed of two concentric conical concentric base, and provided with interior andextei rings,rthe base of the upper resting on the apex 'of rior grinding-teeth, substantially in the manner and the lower. 'The inner and. outer peripheries oi' both for the purposeset forth. are serrated *or tinted to correspond with the two sets 2. In combination withthe above, the upper and of grinding-teeth on the core M and the curb A. lower grinding-sin'faces G and D, one directly over The apex ofthe upper cone of the runner is cut the other, the upper discharging the coarsely-ground away, forming a series of steps 1, 2, `3, 85e., the said material into the lower, substantially in the manuel' steps projecting about equal to the pitch ofthe teeth, audvfor the purpose setforth. and` dropping about three-quarters of an ,inch to the 3. The central hollow bearing L 0f the core M, in step,` the number of steps depending upon the size of combination wit-h the ring or annular journal K, the runner, a base-ring being leftfor support. arms G, `(having stops H,) and shaft B, withthc driver J, all constructed and operating substantially lower, where the bark is .finely ground.y and finished,

as described, for the purpose set fort-h. substantially as and for the purpose set forth.

4. In bark or other mills, the combination aud a-r- In testimony whereof, I have hereunto'set my hand, rangement of the upper and lower continuous grindthis 18th day of August, A D. 1869. ing-surfaces, the buse of the former resting upon and Witnesses: VILLIAM TANSLEY. slightly projecting vover the top of the latter, grind- L. D. GILMAN,

ing coarsely and evenly, and discharging into the FRANK H. RICHARDS.

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