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

• Current Assignee: Dynamark Limited
• Original Assignee: TAMAO MORITA, 47-1, 6-CHOME, ARAKAWA, ARAKAWA-KU, TOKYO,
• Inventors: Morita, Tamao
• Primary Examiner(s): Hirsch, Paul J.
• Application Number:
  US06/477,838
• Time in Patent Office: 445 Days
• Field of Search: 24/201 B, 24/303, 24/113 MP, 24/94, 292/231.5
• US Class Current: 24/303
• CPC Class Codes: E05C 19/16 Devices holding the wing by magnetic or electromagnetic attraction E05C17/56 takes precedence
• CPC Class Codes: Y10T 24/1959 Magnetic, adhesive, or snap type fastener connects tie to shirt
• CPC Class Codes: Y10T 24/32 having magnetic fastener
• CPC Class Codes: Y10T 24/45911 and formed from or fixedly attached to projection or cavity portion
• CPC Class Codes: Y10T 292/11 Magnetic

Abstract

A magnetic fastener using a permanent magnet. A first ferromagnetic plate and a permanent magnet attached thereto are mounted on a body of a handbag or the like, and a second ferromagnetic plate is mounted on a cover thereof so that the second ferromagnetic plate may be magnetically fastened to the first when the cover is closed.

Claims

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, and

an 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.

2. The magnetic fastener as claimed in claim 1, wherein said securing means comprises locking tabs on the peripheral edge of said cover member of non-magnetic material, said locking members being bent around edge portions of said first ferromanetic material member to secure said member to said cover member and thereby completely enclose said magnetic member.

3. The magnetic fastener as claimed in claim 2, wherein a second elongated projection is provided on said first ferromagnetic material member having substantially the same shape and size as said first projection extending in said groove for contacting engagement with said first elongated projection and correspondingly radially spaced with respect to said groove.

4. The magnetic fastener as claimed in claim 3, wherein said elongated projections are cylindrical in shape and the cross-section of each said groove is a circular segment.

5. A magnetic fastener comprising:

a magnetic member having a first side and a second side of opposite polarities, and a 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, and

an elongated projection extending from said base plate 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, said securing means comprising locking tabs on the peripheral edge of said cover member of non-magnetic material, said locking tabs being bent around edge portions of said first ferromagnetic material member to secure said first ferromagnetic material member to said cover member and thereby completely enclose said magnetic member, said magnetic member, cover member and first and second ferromagnetic members being substantially rectangular in cross-section so that said peripheral edges meet at substantially right angles, and said elongated projection is substantially rectangular in cross-section and extends along one peripheral edge of said cover member in close spaced proximity thereto for the entire distance between said first and second ferromagnetic members, and the cross-sectional dimensions of said projection are greater than the thickness of said base plate.

6. A magnetic fastener comprising:

a magnetic member having a first side and a second side of opposite polarities, a substantially central hole extending between said sides, and a 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 substantially central hole in said cover member coaxial with said hole in said magnetic member, a cylindrical flange on said cover member at said hole therein extending axially into said hole in said magnetic member and in engagement therewith to retain said magnetic member in radially fixed relationship with respect to said cover member;

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 positionable against said non-magnetic cover member adjacent said second side comprising;

a base plate adapted to engage said non-magnetic cover, and

an elongated projection extending substantially centrally from said base plate through said holes in spaced relation to said hole in said magnetic member 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, said securing means comprising locking tabs on the peripheral edge of said cover member of non-magnetic material, said locking tabs being bent around edge portions of said first ferromagnetic material member to secure said member to said cover member and thereby substantially enclose said magnetic member.