US429381A - Adjustable scraper for roller-mills - Google Patents

Description

J. HARVEY. I ADJUSTABLE SOBAPBR FOR ROLLER MILLS.-

(No Model.)

Patented-June 3, 1890,

//v VENTOI? W/ TN E SSE 8 NITED STATES ATENr FFICE.

JOHN HARVEY, OF BROOKLYN, NEW YORK.

ADJUSTABLE SCRAPER FOR ROLLER-MILLS.

SPECIFICATION forming part of Letters Patent No. 429,381, dated June 3, 1890.

Application filed March 22, 1890.

To all whom it may concern.-

Be it known that I, JOHN HARVEY, of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Adjustable Scraper for Roller-Mills, of which the following is a full, clear, and exact description.

This invention relates to improved means for the removal of crushed grain from the rolls of a roller-process mill used to disintegrate grain and reduce it to flour.

In the manufacture of flour from grain by the roller process it is essential that the crushed material should be continuously removed from the rolls; otherwise the accumulation of the same on the surface of the contiguous rolls will become solidified and embedded in the surface of said rolls, causing injury thereto. Y

The objects of my invention are to provide a roll-scraping device for roller-mills which is of simple form, adjustable and non-abrasive in contact, thorough in operation, and that avoids all danger of fire from its action on the rolls.

To these ends my invention consists in certain features of construction and combination of parts,which are hereinafter described, and indicated in the claims.

Reference is to be made to the accompanying drawings, forminga portion of this specification, in which similar letters of reference indicate corresponding parts in all of the figures.

Figure 1 is a side elevation of one roll of a roller-mill revolubly mounted on the upper portions of side frames of the crushing-mill,

the improved roll-scraper being shown in positi on below the roll in contact therewith. Fig. 2 is a transverse elevation in section of a series of three rolls in operating position upon Serial No. 344,907. (No model.)

scraper-frame is proportioned to the width of the frame of theroller-mill,between the sides A of which said scraper-frame is introduced at right angles, so that its end portions willbe close to the inner faces of these sides. At each end of the scraper-frame ears 0 are integrall y and oppositely projected, having their outer faces aligned with the ends of the vertical flange b and base-plate a, these 'ears being re-enforced on their inner faces by abutting ears 0, formed on extensions of the free edge of the base-plate, a, on which edge projections of the base-plate other ears cl, nearer the longitudinal center of the scraper-frame, are formed integrally. The cars cat the ends of the frame are perforated laterally and are screw-threaded for reception of set-screw bolts e, which by their adjustment longitudinally will secure the frame between the sides of the roller-mill. Threaded holes are made in the ears d for the introduction of set-screw bolts f, the use of which will appear. A wooden clamping-strip O is provided,which is of such relative form as to fit loosely between the vertical flange b and the parallel ears d, said strip having a rabbeted recess formed on the face that is adjacent to the flange b, which recess is of a suitable depth vertically and laterally considered to admit a strip of leather D or other proper material of like nature. The leather piece D is designed to afford a scraperedge; hence it is made to project a short distance above the clamping-strip O and vertical metal flange b, the thickness of the leather piece slightly exceeding the lateral depth of the rabbet-recess in which it is seated,so that it may be firmly clamped between the piece 0 and flange opposite when the set-screw bolts f are properly adjusted. To prevent the embedding of the set-screw bolts f into the wooden strip 0, washer-plates 9 (shown in Fig. 2) are introduced to receive the end-thrust of the bolts and distribute their impact over a larger surface on the clamping-strip.

The metal rolls E, that are of the usual approved construction, are adapted to revolve in contact, or nearly so, for the crushing of wheat or other grain. These, being made to rotate with proper speed toward each other in pairs, are supplied with grain on top and crush it by their revolution in the usual way. The movement of the rolls is not a feature of this invention; hence it is not necessary to show the means for efiecting the same.

Below each roll, at any preferred point for contact, the scraper-frame is adjusted to 10- 5 cate the upper edge of the scraper-strip in close contact with the periphery of the cylindrical roll, so that the bearing-edges of all the scrapers will remove the adhering crushed materialfrom the roll-faces and keep them 10 clean.

While it is feasible to employ hard"- rubber and compressed paperboard froinwhieh to manufacture the scraper-strips D, preference is given to good hard rolled leather for the I 5 purpose, which, if properly prepared and adjusted,will Wear well and afford good results, all danger of fire or abrasion of the rolls being obviated.

\Vhen the scraper-strips D are worn on the 20 edges, they can be elevated by an adjustment of the set-screw bolts h,'which engage threaded holes in the base-plate a near the ends and bear upon washer-plates g, set into the strip, and if necessary to raise the leather strips 25 from their seat in the clamping-piece 0, this can be done by insertion between them of a liner of any suitable material, as shown at 2 in Fig. 2.

Having thus described my invention, I

claim as new and desire to secure by Letters 0 Patent 1. A scraper for a roll of a roller grain-crush ing mill, comprised of a metal frame, a nonmetallicelampingstriplaterallyandvertically adjustable, and a non-metallic scraper-strip 5 clamped between the clamping-strip and an integral metal flange on the f rame,the scrap erstrip being seated 011 the clamping-strip and adjustable with it, substantially as set forth.

2. In a scraper for a roll of a grain-crush- 4o ing roller-mill, the combination,with an elongated metal frame comprised of a base-plate and vertical flange integral with the bascplate, set-screws adapted to hold the frame in position below a roll it is to scrape, and a 5 wooden clamping-strip rabbeted to form a seat for a non -metallic scraper-strip, of a leather or other non-metallic scraper-strip seated on the clamping-strip, set-screw bolts which bear against the clamping-strip to ele- 5o vate it, and other set-screw bolts which are adapted to adjust the clamping-strips laterally, substantially as set forth.

JOHN HARVEY. WVitnesses:

WM. P. PATTON, O. SEDGWICK.

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