Abstract: A device surrounding a canister filter providing a magnet having one pole located on the end of the canister at or near the axis of the canister while providing a second pole to the surrounding surface of the canister via a helical metal bar surrounding the canister and conforming thereto. Accordingly, a magnetic field is created within the canister housing to include substantially all of the filter fluid passing through the canister housing. Thus, the invention provides significantly improved filtration of magnetic particles.

Abstract: A brick edging device is disclosed for use as an interface or boundary of a bricked region In one aspect the edging device includes an elongate extruded aluminum strip extending in a longitudinal direction having a flange portion attached to an edge of the aluminum strip and extending in a transverse direction outwardly from one side of the strip. The flange is provided with a series of V-shaped cut-out portions spaced along the length thereof with the flat apex of the V being spaced from the edge of the elongate strip. The portion of the flange located between the cut-outs form individual flaps, each flap having an aperture extending therethrough to receive a spike. The apertures are countersunk so that the spike heads are flush with the flaps. There is an angle of at least 90 degrees between the sides of the V shaped cut-out portions and the aluminum strip is bendable at points adjacent to the apex to at least 90 degrees.