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805,211
supporting frame, of a series of helical turns of wire, said wire having a broadened face outermost and laterally projecting upset de- pressed portions at intervals along said outer 5 face to engage contiguous wires, substantially as described. 10. In a well screen, the combination with . a supporting frame, of a screening surface formed of turns of wedge-shaped wire having to a greater depth than width wound. upon the frame edgewise and spaced apart, and means on the wire to hold it edgewise on the sup- port, substantially as described. 11. A screen having its screening surface 15 formed of a helically wound wire which in cross section is of greater depth than width being wound edgewise, and the space between the turns of wire increasing in size toward the interior of the screen, and having the outer 20 edges higher than the surface between them. 12. In a screen a straining wall composed
of wire having a depression on the outer face between the edges of the wire. 13. A wire for well screens having a de- pressed longitudinal groove in its outer face, 25. substantially as described. 14. A well screen comprising a supporting structure,,.and a screening surface formed of turns of band-shaped wire spaced apart and having one edge thinner than the other, the 30 said wire being wound edgewise on said sup- porting structure and forming an underfiow chamber between adjacent portions of the wire and the supporting structure. In testimony whereof I have hereunder 35 signed my name in the presence of the two subscribed witnesses. MAHLON E. LAYNE. Witnesses: C. J. MILLER, MABEL NORTON.