Engageable article using permanent magnet

  • US 4,453,294 A
  • Filed: 03/25/1983
  • Issued: 06/12/1984
  • Est. Priority Date: 10/29/1979
  • Status: Expired due to Term
First Claim
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1. A magnetic fastener comprising:

  • a magnetic member having a substantially circular cross-section, a first side and a second side of opposite polarities, and a substantially cylindrically shaped peripheral edge;

    a cover member of non-magnetic material configurationally conforming and adjacent to said second side and said peripheral edge of said magnetic member so that it encloses said magnetic member except said first side;

    a first ferromagnetic material member positioned against said first side of said magnetic member and having at least two prongs rigidly secured thereto and extending outwardly therefrom for attaching said first ferromagnetic member to a first surface;

    means for securing edge portions of said first ferromagnetic material member to regions of said cover member of non-magnetic material in the vicinity of said peripheral edge; and

    a second ferromagnetic material member removably positioned against said non-magnetic cover member adjacent said second side comprising;

    a base plate adjacent said non-magnetic plate, andan elongated projection extending from said base plate adjacent the periphery therof toward and contacting said first ferromagnetic material member, and a plurality of prongs rigidly secured to said base plate and extending outwardly therefrom for attaching said second ferromagnetic member to a second surface, and futher comprising a concave arcuately shaped groove in said peripheral edge of said magnetic member extending between said first and second sides and a concave arcuately shaped groove in the peripheral edge of said cover conforming thereto, said elongated projection being substantially commensurate in shape with and adapted to be received in said groove in said cover in radially spaced relationship thereto and having a substantially circular cross-section of greater dimension than the thickness of said base plate.

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