US571575A - Screen for sand - Google Patents

Description

(No Medal.)

- J. NORWOOD.

SCREEN FDR SAND, 85c.

Patented Nov 17, 1896.

UNITED STATES PATENT OEErcE.

JOSEPH nonwoon, or BROOKLYN, NEW roan.

SCREEN FOR SAND, 84.0.

SPECIFICATION formingpart of Letters Patent No. 571,575, dated November 17, 1896.

Application filed March 11, 1896.

To aZZ whom it may concern:

Be it known that I, JOSEPH i onwoon, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented an Improvement in Screens for Sand, &c., of which the following is a specification.

Screens have heretofore been made with longitudinal parallel wires and the wires have been kept at the proper distances apart by cross-lacings of wire, and in some instances the lacing-wires have also secured transverse rods. This involves considerable hand labor and the expense is correspondingly increased. In other instances the parallel wires have been let into notches in the edges of bars and the metal at the ends of the notches has been upset or riveted, so as to spread the same partially over the wires and hold them in position; but this mode of securing the wires is unreliable and requires considerable labor in spreading or upsetting the metal to secure the wires.

The object of the present invention is to simplify the construction of the screen, lessen the cost of the same, and render the connection between the wires and the cross-bars stronger and more durable.

I make use of parallel wires held together by one or more cross-bars, each cross-bar being made with diagonal incisions for the reception of the wires, and which wires are held firmly in position by bending down the hook-shaped points of the cross-bars at the acute angles between the slots and the edges of the cross-bars, thus firmly grasping and holding the parallel wires; and in constructing a sand-screen I use similar cross-bars at the top and bottom ends, the same being introduced into grooves or between transverse slats at the top and bottom ends of the screen, and. the ends of the cross-bars are bent up at right angles, so as to firmly hold the side pieces of the screen-frame in their proper relative positions.

In the drawings, Figure 1 is an elevation representing the top and bottom portions of a sand-screen, one of the side pieces being in section. Fig. 2 is alongitudinal section at the line 2 2. Fig. 3 shows part of one of the crossbars with some of the wires in position and with some of the slots open ready for the re- Serial No. 582,719. (No model.)

ception of the longitudinal wires, and Fig. l is a plan of the parts shown in Fig. 3.

The parallel bars A or wires are of any desired size, shape, and length, and the crossbars 13 are applied at suitable distances apart, and each cross-bar is of the desired strength and preferably of a comparatively soft steel, and in one edge of each cross-bar slots 3 are made by the action of a suitable die and punch or by saws or cutters. Each slot is diagonal, so as to leave the metal at one side of the slot in the form of an acute angle, and the slots are sufiiciently deep for the acute angles to form hooks 4, and the wires are introduced into the slots and resting at the bottoms of the slots the hooks a are pressed down orbent over the wires, so as to retain them in position in a very firm and reliable manner, and by making the slots in the form represented in Fig. 3 the acute-angle hooks i can be bent down rapidlybya roller or other tool forcibly brought into contact with the edge of the bar and passed across the same.

It is advantageous to bend the ends of the wires A at right angles, so as to come outside the top and bottom cross-bars of the screen and thus prevent end motion to such wires.

Screens made in this manner can be made up into any desired form, and where they are employed with a wooden frame, as shown in the drawings, for use in screening sand, ashes, or other materials, the top and bottom crossbars and the bent ends of the wires A are re ceived into grooves in the top and bottom cross-pieces O and D, which connect the side pieces E at the upper and lower portions of the screen, or these top and bottom cross-bars B may be received between two of the slats or cross-pieces formingtbe top and bottom ends of the screen.

The intermediate cross pieces B on the screen are made sufliciently long for their ends to project beyond the side pieces E, and such cross-pieces are received into notches or saw-cuts in the back edges of such side pieces E, and they are bent outwardly and at right angles and preferably secured by screws or nails passing through the perforated ends of the cross-bars, so as to connect the side pieces E firmly to the cross-bars, and I usually employ bands F, nailed or screwed to the back edges of the side pieces E, as an adthe frame and the crossbars at the respective ends of the parallel Wires being received with the bent ends of such Wires into the grooves of the top and bottom cross-pieces of the frame, substantially as set forth.

2. The combination in a screen with the par- ---a1leI wires, of cross-bars slotted diagonally and receiving the wires, the acuteangled hooks of the cross-bars being bent downv to hold the wires in position and the ends of the cross-bars being bent at right angles,the crosspieces 0 D and the sideframes connected together, such side frames being notched for the passage of the end portions of the cross bars, and to which side pieces the ends of the cross-bars are connected, substantially as set forth.

Signed by me this 9th day of March, 1896.

JOSEPH NORYVOOD. VVitn esses j Gno. T. PINQKNEY, MARY L. BYRNE.

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