US796485A - Rotating screen. - Google Patents

Description

PATBNTBDAUG. 8, 1905.

W. W. WINDLE.

. ROTATING SCREEN.

A?PLIGATION FILED MA-B.. 3, 1900.

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N0.79,4s5. PATENTED AUG.8,1905. W. W. WINDLE. ROTATING SCREEN.

APPLICATION FILED MAB. s, 1900.

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UNITED STAITES PATENT OFFICE.

ROTATING SCREEN.

Specification of Letters Patent.

Patented. Aug. 8, 1905.

Application filed March 3, 1900. Serial No. 7.178.

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Be it known that 1, WILLIAM W. l/VINDLE, a citizen of the United States, residing at Millbu ry,in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in Rotating' Screens, of which the followingis a specification, reference being' had to the accom panyingd rawings, forming a part of thev same, in which#- Figure l represents an end view of a rotating' screen embodying my invention, the view showing the receiving' end of the screen. Fig. 2 is a side elevation with theinclosing case removed on the line 2 2, Fig. l. Fig. 3 is an end view showin g the delivery end of the screen and represented in sectional View on line 3 3, Fig'. 2; and Fig. LlE-is a top view of a portion of the screen, showing the delivery end with the casing removed on line 4 4, Figs. l and 3.

Similar reference-letters refer to similar parts in the different views.

vWy invention relates to a' rotating screen designed to remove dust and other impurities from the articles screened, and particularly from wool, cotton, and other fibrous material; and the object of my invention is to provide a screen for this purpose which shall be auto- .matic in its action, and I accomplish these results by means of the construction and arrangement of parts as hereinafter described, and pointed out in the annexed claims.

Referring to the drawings, A denotes an inclosing case which, however, maybe omitted, if desired. Contained within the chamberinclosed bythe case A is a rotating screen, consisting in the present instance of aframework comprising the hexagonal heads B B', having circular openings B2 and connected by the long'itudinal strips or bars B3. The outer hexagonal surface of the frame is covered with wirecloth or wire-netting C, having a suitable mesh to retain the fibrous material being screened and permit the escape of dust and other impurities. Surrounding the framework of the screen and attached thereto are rings D D and D, the rings D D being provided with iianges to hold the screen from longitudinal movement on its driving-pulleys, and each of the rings rests upon friction-rolls E, which are carried by parallel shafts Fi', journaled in bearings E2, which are supported upon a framework F, resting at the end F upon the iioor and supported at the end F2 upon wedges F, which are arranged to slide upon ways Fl and are actuated by a screw-threaded shaft F5, having at its center a hub F, provided with holes to receive aspanner by which the screw-threaded shaft may be rotated in order to separate' the wedges or draw them nearer together. The purpose of the sliding wedges F3 is to elevate the end F2 of the supporting-frame F, and thereby incline the axis of the rotating screen by raising the receiving end of the screen higher than the delivery end, so that as the wool or other fibrous material is placed within the screen at the highest or receiving end it will be gradually moved lengthwise the screen bygravity as the screen is rotated. A series of pins Cr are inserted in back of the longitudinal bars B3 at a slight angle to a radial line, the pins being inclined in the direction in which the screen rotates, as indicated by the arrow 1, so that the material to be screened will be caught by the inclined pins Cr and carried from the bottom of the screen to the `top, where it slides off the pins Cr and falls by gravity to the bottom of the screen. The continued concussion of the iibrous material against the bottom of the screen as it is raised and allowed to fall causes the dust to be liberated and fall through the meshes of the wire-cloth C upon an apron H, which is curved concentrically with the axis of the screen and arranged to gather thedust falling through the meshes of the screen. The rotating screen carries a longitudinal blade I, extending the entire length of the screen, the blade projecting radially beyond the rings D Dl far enough to sweep the dust gathered on the apron H off the end H and allow it to fall by gravity through a chute H2.

As the fibrous material is carried by the pins G to the top of the screen and allowed to fall it will be carried by gravity in a vertical line to the bottom of the screen, and as the axis of the screen is raised at the receiving end the falling material will drop each time upon the bottom of the screen at a point slightly nearer the delivery end of the screen, the distance being determined by the inclina tion of the axis of the screen. The time required to move the fibrous material-from the receiving end to the delivery end of the screen can therefore be varied by the operator by' raising or lowering the receiving end of the screen by means of the sliding wedges F3.

At the delivery end of the screen I provide a circular drum J concentric with the circu-4 lar opening B at the delivery end of the screen, into which the material is delivered from the screen as it rotates. The drum J is closed at its outer end, but open at its inner the fibrous material afterit has been screened` through the opening' Jeither upon the floor or through a vertical chute.` (Indicated by the broken lines J3, Figs. 2 and 3.) The shafts E' are rotated by meansof the gears K K, en-

gaglng a gear Ix on acounter-shaft K whlch carries the tight and loose pulleys K3 K'l and is driven by a belt connection with a main driving-shaft.

The sleepers F F, composing the frame, are extended rearwardly and are adapted to support the hanger L, in which are journaled the ends of the shafts E E and the shaft K2, carrying the pulleys K3 K2. Thus when the wedges F3 F3 are operated against the inclined lower faces of the front ends F2 F2 of the frame F, which front ends are cut away to receivethe wedges, the frame F and its connected parts is raised or lowered on its ends F' F as fulcrums, the movement at the ends F F being very slight, owing to the length of the machine.

The operation of my improved screen is as follows: The wool, cotton, or other fibrous material to be screened is placed in the screen through a circular opening in the head B at the receiving or highest end of the screen, and as the screen rotates the material is caught by the'projecting pins G and carried in the direction of the arrow l to the top of the screen, from which it falls by gravity to the bottom to be again lifted as the screen rotates. As the end F2 of the frame F is raised, by means of the sliding wedges F3, to give the proper inclination to the axis of the screen the fibrous material will be gradually carried toward the delivery end of thev screen as it rotates, and the inclination given to the axis of the screen determines the time the material is subjected to the action of the screen, a suflcient time being allowed to thoroughly screen the dust and all impurities, which will pass through the meshes of the cloth from the material. In case the material delivered from the end of the screen is not sufciently clean the wedges FS are moved outwardly to lower the axis ofthe screen at the receiving end, and thereby increase the time the fibrous material is subjected to the action of the screen before it is delivered into the drum. During the operation of screening not only dust and dirt but burs, short fibers of wool, and all particles which are small enough to pass through the meshes of the wire-cloth C are extracted from the material and deposited upon the apron H, from which the accumlation is scraped by the blade I and delivered through the chute H2, while the cleaned material is caught in the drum J and delivered therefrom by the blades J through the spout J2 and chute J3. rIhe apparatus is therefore entirely automatic in its action, and after having covered the revolving frame with a screencloth of suitable-sized mesh and adjusted the inclination of the axis of the rotating screen to cause the material to be retained until thoroughly screened the operation will be automatically continued by simply feeding material to the receiving end of the screen, and both the screened material and the impurities removed therefrom will be delivered through separate delivery-openings.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. The combination with a rotating screen, of a frame capable of inclined adjustment, means on the frame for supporting and rotating the screen, the screen provided with inlet and discharge openings, a fixed drum located outside of and adjacent the dischargeopening and a blade carried by the screen and projecting' longitudinally beyond its discharge end, the blade received within the independent fixed drum and adapted to scrape ythe interior thereof.

2. The combination with a rotating screen, of a frame capable of inclined adjustment, means on the frame for supporting and rotating the screen, the screen provided with inlet and discharge openings, a drum located outside of and adjacent the discharge-opening and a blade carried by the screen and projecting outside the discharge-opening and into the drum to scrape the interior thereof.

3. rIhe combination with a rotary screen, of a frame, means carried by the frame for supporting and rotating the screen, the screen provided with inlet and discharge openings, a stationary drum located beyond the screen and adjacent the discharge end thereof, the drum adapted to receive the material delivered from the screen, a chute leading from the drum for the Aconveyance of the material therefrom and means for scraping the drum.

In testimony whereof I have sign ed my name to this specification, in presence of two subscribing witnesses, this the 28th day of February, 1900.

WILLIAM W1 VINDLE. Witnesses:

AVA T. MURPHY, RUFUs B. FowLnR.`

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