Jeffrey Glenn Stevens

US Patent:

49560840, Sep 11, 1990

Filed:

Aug 21, 1989

Appl. No.:

7/396034

Inventors:

Jeffrey G. Stevens - Redmond WA

International Classification:

C02F 148

US Classification:

210222

Abstract:

The apparatus comprises two magnets or stacks of magnets, two cover boxes, two backing plates and at least two connecting straps. The magnets are rectangular in all views with their length in the range of 2 to 10 times the diagonal dimension of the rectangular crossection. The magnets are permanent and polarized such that two opposite long faces are the pole, one north, the other south. The magnets are positioned on a conduit, one on each side with their long axes parallel to the axis of the conduit and their south poles contacting the conduit. The backing plates are the same length as the magnets, positioned centrally width-wise on the north pole surfaces and as wide or wider than the magnets. The magnets and backing plates are held in place by placement of the cover boxes over them and attachment of the boxes to each other by the connecting straps. The straps are threaded through slots in the sides of the covers.