US209829A - Improvement in roller-mills for reducing grain - Google Patents

Description

i L, NEMBLKA; y Roller-Mill. for Reducing Grainlv y No. 209,829. Patented Nov. 12,1878.

A2 Sheetssheen 1.

L. NEMELKA. l Roller-Mill lfor Reducing Grain.

No. 209,829. Patented *,Novf; 12'111s7sl x if@ #2A Wndded N-PETERS, PNOT-LITNOGRPNEEL WASHINGTON. I!A C.

, according to my invention.

"Nrrnn STATES PATENT FFW? LORENZ NEMELKA, OF SIMMERING, NEAR VIENNA, AUSTRIA.

IMPROVEMENT IN ROLLER-MILLS lFOR-REDUCING GRAIN.

Specification forming part of Letters Patent No. 209,829, dated November 12, 1878; application iiled May 11, 187s.

To all whom# may concern.- v

Be it known that I, LORENZ NEMELKA, of Simmering, near Vienna, -in the Empire` of Austria, have invented certain new and useful Improvements in Roller-Mills, ot' which the following is a specication:

The object of this invention is, first, to furnish means for adjusting the rollers of ro1ler` mills for grinding into flour grain already coarsely ground,or whatis known as Sharps or middlings, the said adjustment being effected in such a manner that the rollers will produce the best effect and with the requiredpressure, but without being liable tov be jammed together, and yet allowing obstacles accidentally introduced to pass through withl f out injuring the machinery; secondly, tovenable the grain or iour to pass twice through the rollers while using onlya set of three roll eis; and, thirdly, to arrangements for llubrieating the bearings of thero'llers ofrollermills v In .the.anpexedd-rawin-gs,ligireis a side `viewafrtiy in sectiomand Fig. 2 a front-view, partly' in section, of a rollermill constructed Fig. 3 is a longitndinal, and Fig. 4 a cross, section of the axlebearin gs, with my arrangement for lubricating the same. l

The construction of roller-mill shown in the' drawings consists of two independent sets arranged in the same framing, and as bot-h sets are of exactly the same construction the same letters of reference have been used for the single parts of each set; and it is evident that, without departing from the nature of this invention, the roller-mill may be constructed with a single set instead of double sets.

\ rlhe sharps or middlings are introducedinto the hopper a, and pass from here over the deliveryroller b, which is provided with a pivoted d or, c, to regulate the quantityn to be admitte From hence they pass first between the middle grinding-roller, e, and upper griiidingroller, d, and then between the middle roller, e, and lowest roller, f, and are finally led oft through the delivery-hopper g. The roller is arranged in iixed bearings h, and cannot be displaced during the workin g 5 but the bear'\r11gs of the two rollers d and f are arranged fn swinging brackets i, pivoted at k li: on the eccentrics L l, which are formed of onepiecevwith the axles 7c k. It is evident that, by displacing vthe'levers m m, which are keyed to `the axles 7c k, the rollers d and f may be adjusted nearer to or farther from the roller e, as may be required by the material to be ground. To prevent the possibility of the noniadjustable roller e, their swinging brackets t' .i rest on the setscrews n n.

The central axial lines of the rollersl and f lie alittle above the straight lines o k, drawn from the center of the axial line of the rollers to the center'of the axlesk ,a and it is evident that the nearer the central axial lines of the rollers d and f approach the straight lines o k, the greater will be the pressure of the rollers el and f,resp'ectively, on the roller e. It is also evident that thisV pressure is self-acting, being caused by the weight of the swinging rollers 'd and j', and that therefore the said rollers d and f will give way and be lifted if an unusually hard substance should come between them and the roller y e. screws an, on which the bearings of the swinging rollers d and f rest, the pressure of the rollers d and j' on the roller e may be variedy a-srequired.

The levers m on are provided with set-screws p p, the ends of which iit into. slots formed in the standards q, andr by means of these setscrews p p the levers m m may be fixed in any desired position.

The standards q and 1', in which the axles 79 7c E v have their bearings, are so arranged, as shown inFig. l, that when the bearings are worn the said` standards may be adjusted bymeans of the set-screws t. n

All the bearings of the rollers'areprovided with self-acting lubricating arrangements, as4v 'adjustable rollers d and f being jammed to the By adjusting the shown in Figs. Sand 4. Alubrieatingdi/skgu, a

is ixed tothe shaft, and' the oil raised by it from below is scraped off by the scraper v and distributed over both sides of the bearing.y The o'il then flows back through the passages w together into the middle,.from whence it is again lifted bythe disk a. Each roller is pr0. vided with a scraper,

lt is evident that, without departing from the substance of this invention, the arrange- 'ment ofthe parts for enabling a roller of a .A

roller-mill to swing' on an. axle and to be adjustable, as described, may be used in a set of a pair of rollers instead of a set of three rollers, and that therefore either the roller d or the roller fmay be omitted Without altering the character of this invention.

I claim- 1. In a middlings-grinding machine7 the means employed for zuljusting,` the position of the yielding grinding-rolls relatively t0 that of the roll mounted in stationary bearings, which consist in the combination7 with said yielding rol1s,oftl1e fulerumed bearings 2, shafts k, eceentrics l, levers my, and their grooved segments, the setscre\vs p, and the brackets q, all arranged and operating substantially as described.

2. The combination of the roller l or j', brackets z'7 axle k, eccentrics l, and levers m, essentially as deseribed,and for the purpose described.

in the set-screws u and a ixed support or` abutment for such set-screws either on the frame or fixed bearing h, in combination with said yielding or swinging bearings, substantially as shown and described.

In witness that I claim the foregoing I have hereunto set my hand this 23d day of March, 1878.

L. NEMELKA.

Vitnesses:

C. O. PAGET, T. BARTA.

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