GB1102311A - Centrifugal basket and method of manufacture thereof - Google Patents

Abstract

1,102,311. Centrifugal strainer basket. AMERICAN FACTORS ASSOCIATES Ltd. 11 Jan., 1966, No. 1211/66. Heading B1D. [Also in Division B3] A basket for a centrifugal strainer (Figs. 1 to 4, not shown) provides support for an internal filtering cloth or wire screen and comprises a helical coil of stainless steel wire of flat crosssection supported in turn by external axial ribs and upper and lower rings, all welded to the wire at their intersections. In Fig. 1 the ribs carry a conical shroud (15) and the upper ring (14) carries a dependent shroud (17), for the guiding of filtrate. In Fig. 2 the ribs are in two pieces, forming V-shaped sections, and are supported by outer, axially spaced rings (30- 35). The baskets shown are frusto-conical, but a cylindrical basket is mentioned. In manufacture, wire is fed by driven rolls (55, 56) (Fig. 14, not shown) through straightening roller assembly 41 (Fig. 13, not shown) to peripherally grooved rolls 110, 111. 112. Roll 112 is progressively advanced towards roll 110 by means of a cam (135) (Fig. 6, not shown), which is moved by a handle (140) or by a drive 150 - - (155) from the drive rolls (55, 56). Thus the curvature given to the wire is increased to form a helical, conical coil which is wound on to assembly 160-164. The coil is then placed on a welding jig (Fig. 7, not shown), which comprises circumferentially spaced bars (190), with external notches (191) to receive the wire (Fig. 12, not shown), and a single rib-supportng frame (200) which is rotatable round the jig to hold successive ribs or pairs of ribs (Fig. 11, not shown), against the coil for welding thereto. The jig also supports the end rings (10, 14) for welding to the ribs and wire ends. The jig is constructed for easy dismantling from inside the finished basket. Figs. 15, 16 (not shown) illustrate a further jig which is mounted on the shaft of that in Fig. 7, after removing rib supporting frame (200), to hold the external rings of the Fig. 2 embodiment while they are welded to the ribs.