US434028A - Roller-mill - Google Patents

Description

(No Model.)

0. P. WALTERS & P. SHELLENBAOK.

ROLLER MILL.

Patented Aug. 12, 1890.

wib atkozmu fa UNITED STATES PATENT OFFICE.

CHARLES F. WALTERS AND PETER SHELLENBAOK, OF RICHMOND, INDIANA.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 434,028, dated August 12, 1890.

Application filed February 13, 1890. Serial No. 340,355. (No model.)

To all whom it may concern.-

Be it known that we, CHARLES F. \VALTERS and PETER SHELLENBACK, of Richmond, in the county of Wayne and State of Indiana, have invented certain new and useful Improvements in Roller-Mills; andwe do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the letters of reference marked thereon.

This invention relates to roller-mills for grinding grain, &c., and particularly to the means employed to adjust, align, or tram and relieve the pressure on the grinding-rolls, the object of the invention being to simplify the mechanism employed, reduce its cost, and increase its efficiency and ease of manipulation; to which ends it consists in certain novel details of construction and combinations and arrangements of parts, to be hereinafter described, and pointed out particularly in the appended claims.

Referring to the accompanying drawings, Figure 1 is a side elevation of a portion of a roller-mill, showing the application of our invention to a single pair of rolls. Fig. 2 is a detail of the tension-bar employed in Fig. 1. Fig. 3 is a view similar to Fig. 1, showing a slightly different embodiment of the invention. Fig. 4 is a detail of the tension-haremployed inFig. 2; Fig. 5 is a detail of the spring-pressed follower for the tension-bar, Fig. 3.

Similar letters of reference in the several figures indicate the same parts.

A A indicate the frame or supporting casing of any approved form, B and O the yielding and non-yielding rolls, respectively, and D E the spring-supports for the respective rolls. A casting F is fastened rigidly to the side of the casing or formed integral therewith below the rolls, and serves as the base for the supports D E, which are attached thereto by bolts d e; or, if desired, one orboth of said supports, as E, in Fig. 3, may be formed integral with said casting, in which instance the resiliency of the cast metal is relied on to permit the necessary movement of the roll,'as described in our prior application, Serial No. 320,287, filed August 9, 1889.

At the upper end of support E is formed or attached a bearing E for the non-yielding roll 0, having at one side an arm or extension 6*. On the casing, and in proximity to the position occupied by the arm e, is a log or projecting portion 6', having a set-screw c passing through a slot therein and engaging the arm 6, said lug also serving as the base against which the set-screw c in the arm 6 rests. The screw (2 may be adjusted to move the roll vertically, and the screw 6 serves to hold the roll back tight after being put in tram.

The yielding roll B is mounted in bearings B, secured to the upper ends of the steelspring supports D, before referred to as attached to the casting E, the tendency of such springs being preferably in a direction to separate the rolls. Now in order to adjust the yielding roll horizontally, or, in other words, to regulate the distance between the grinding-surfaces of each pair, we provide what we term a tension-bar H, which at the upper end rests against the bearings B and its lower end against a spring-support, an intermediate fulcrum, preferably adjustable, being provided for retainingthe tensionbar in position.

In Fig. 1 the lower end of the spring-sup port D is curved forward and upward, as at D, and serves as the spring against which the lower end of the tension-bar II rests, the tendency of the spring being to force the lower end of the bar outward, and as it (the bar) is fulcrumed at a point intermediate the spring and roll-bearing, of course tends to force the upper end and roll inward against the tension of the spring-support D, but at the same time permitting the roll to readily yield outward when any foreign substance passes between the rolls. The tension-bar is held up to its work in Fig. 1 by means of a rod K, held at k by a through-shaft, having eccentrics k thereonsuch as are ordinarily employed-s0 as to enable the rolls to be readily spread by relieving the pressure 011 the tension-bar, a hand-wheel screwing onto the rod K, which forms the direct connection between the ten- Fig. 2 is a front elevation of the tensionbar just described, and shows the slot through which the rod K passes.

Referring now to Fig. 3, it will be seen that instead of employing the upturned end of support D, a separate spring-pressed follower M is provided for pressing the lever end of the tension-bar outward, and a slightly-modified form of fulcrum and spreading mechanism is employed, as will now be described.

At the bottom of the casting F is formed a seat for a spring M, with a set-screw m at the rear for adjusting the tension of the spring, and a follower M at the front for engaging the tension-bar, the end of the follower being sharpened or reduced, and adapted to rest in a slot or recess in the said bar. A setscrew m is provided for limiting the outward movement of the lower end of the bar, and consequently regulates the space between the rolls. 7

The upper end of the tension-bar rests against the bearing of roll B, as in the former instance, but instead of being held by the direct pull of a rodsuch as K, Fig. 1a bellthe rollers, one mounted in bearings on a cranlglever N is provided, pivoted on the casing at n and having one arm extending out into position to be engaged by the eccentric lo on the through-shaft 7c, and the other extended upward and provided with a bearing for the threaded shaft N, having the hand-wheelN thereon and adapted to rest against the tension-bar within an elongated recess n Vith this arrangement when it is desired to increase the leverage of the tension-bar it may be accomplished by changing the point of connection between the tension-bar and bearing 13'', as by shifting it to one or-the other ofthe series of recesses b formed in said bearing. It will be observed that the support E extends upward and then horizontally, or follows these general directions, the object being to give the support a sufficient length to yield 1 readily and at the same time enable the roller 0 to be adjusted vertically, and while the particular forms of supports shown in both instances are to be preferred we do not wish to be limited thereto, as it is obvious that other forms may be substituted and will answer the desired ends in a more or less perfect degree.

it will be seen that all the movement of the rolls found necessary in the higher development of the art may be performed-tl1at is to say, the vertical movement to bring the rolls into tram, the horizontal movement to adjust the space between the rolls, the release movement to permit the passage of foreign matter, and the spreading movement for separating quickly a single or any number of pairs of rolls by means of the through-shaft having the cams thereon and turned by a hand-wheel or otherwise. The mechanism employed is itself simple in the extreme, inexpensive, and capable of being manipulated by unskilled labor. It is obvious, however, that the mechanism may be modified and used in connection with other styles of roller- WVith a mechanism such as herein described,

mills without departing from the spirit of our invention.

Having thus described our invention, what we claim as new is- 1. I11 a roller-mill, the combination, with the casing or frame and the rollers, one movable with relation to the other, of the tension-bar, one end of which engages the movable rollerbearing, a spring-support for the tension-bar engaging its opposite end, an adjustable fulcrum for the said bar intermediate the spring and roller bearing, and an eccentric controlling said fulcrum, whereby the rolls may be quickly spread,substantially as described.

2. In a roller-mill, the combination, with the rollers, one mounted in bearing on a springsupport, of a tension-bar engaging the rollerbearing, an adjustable fulcrum for the tension-bar, and a spring engaging said bar and acting to press the rollers together, substantially as described.

3. In a roller-bearing, the combination,with

spring-support, of a tension bar bearing against the movable roller-bearing, a fulcrum for said bar, mounted on a support held in adjusted position by an eccentric, as described, a hand-wheel for adjusting the fulcrum on its support, and a spring engaging the bar and 4. In a roller-bearing, the combination,with

, the rollers, one mounted on a spring-support, of the tension-bar bearing against the roller- I bearing, and the spring for pressing the rollf ers together, the bell-crank lever having the screw bearing against the bar, the hand-wheel on the screw, and the eccentric engaging the bell-crank lever, substantially as described.

5. In aroller-mill, the combination,with the yielding roller mounted in bearings on a spring-support, of an adjustable tension-bar engaging said bearing, an adjustable fulcrum for said bar, and a spring engaging the bar to press the rolls together and permit them to separate for the passage of foreign material, substantially as described.

6. In a roller-mill, the combination,with the yielding roller mounted in bearings on a spring-support, of a tension-bar engaging said bearing, an adjustable fulcrum for said bar, a spring engaging the bar to press the rolls together, and the limiting-screw for regulating the distance between the rolls, substantially as described.

7. In a roller-mill, the combination,with the springsupport, of a tension-bar for engaging said bearing, a fulcrum for said bar, a spring engaging the bar to press the rolls together, and a set-screw for adjusting the tension of the spring, substantially as described.

8. In a roller-mill, the combination,with the 1 yielding roll mounted on a spring-support and a non-yielding roller mounted on a springsupport,with set-screws for holding it in adjusted acting to press the rollers together, snbstantially as described.

IIO

yielding roller mounted in a bearing on a position, of thetension-bar engaging the bearing of the yielding roller, the adjustable fulcrum for said bar, and a spring engaging the lower end of the bar to hold the rolls together, substantially as described.

9. In a roller-mill, the combination,with the casing or frame, the bracket or-casting mounted on the side thereof, the spring-supports connected to said casting, and the rollers journaled in the ends of said supports, of the set-screws for holding the non-yielding roller in position, the tension-bar engaging the bearing of the yielding roller, the adj ustable fulcrum for said bar, and the spring for holding the bar against the roller-bearin g and therollers together,substantiallyasdescribed.

10. In a roller-mill, the combination,with the casing or frame, the bracket or casting se- CHAS. F. WALTERS.

PETER SHELLENBAOK.

WVitnesses:

CHARLES T. SEAMEN, CHAS. E. SHI ELY.

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