Buckles – buttons – clasps – etc. – Having magnetic fastener
Patent
1991-02-19
1992-06-30
Brittain, James R.
Buckles, buttons, clasps, etc.
Having magnetic fastener
A44B 2100
Patent
active
051251345
ABSTRACT:
A magnetic fastener has a female member comprised of a permanent magnet having an axial hole therethrough and a ferromagnetic plate on one pole surface thereof, and a male member comprising a ferromagnetic plate-shaped member removably engageable against the other pole face of the permanent magnet and having a projection extending therefrom insertable into the hole of the permanent magnet, the hole in the permanent magnet having an oblong or elongated shape having a longer diameter and a shorter diameter, the shorter diameter providing little or no clearance between the hole in the area of the shorter diameter and the projecting portion on the removable member, and the longer diameter being substantially greater than the diameter of the projection so that when the parts are separated for unfastening and attempt is made to incline or tilt the projection with respect to the central axis of the hole in the direction of the shorter diameter, the outer surface of the projecting portion will engage against the sidewalls of the hole and retard separation of the parts, but when the projecting portion is inclined or tilted in the direction of the larger diameter the projecting portion will not contact the sidewalls of the hole but can move freely therein, thus making it much easier to open the fastener in the direction of the larger diameter than in the direction of the smaller diameter.
REFERENCES:
patent: 1198227 (1916-09-01), Hinchey
patent: 2340781 (1944-02-01), Wagner
patent: 2397931 (1946-04-01), Ellis
patent: 2475226 (1949-07-01), Ellis
patent: 2521885 (1950-09-01), Vasquez
patent: 2585714 (1952-02-01), Wrobel et al.
patent: 2615227 (1952-10-01), Hornik
patent: 2623256 (1951-12-01), Feibelman
patent: 2627423 (1953-02-01), Copeman
patent: 2693654 (1954-11-01), Clark
patent: 2698917 (1955-01-01), Van Ukr et al.
patent: 2726110 (1955-12-01), Teetor
patent: 2784757 (1957-03-01), Bosca et al.
patent: 2812203 (1957-11-01), Scholten
patent: 2818655 (1958-01-01), De Gaston
patent: 2826328 (1958-03-01), Moen et al.
patent: 2884698 (1959-05-01), Wursch
patent: 2901278 (1959-08-01), Robinson
patent: 2915681 (1959-12-01), Troy
patent: 3027617 (1962-04-01), Gray
patent: 3038232 (1962-06-01), Wean
patent: 3100663 (1963-08-01), Loeb
patent: 3111736 (1963-11-01), Budreck
patent: 3111737 (1973-11-01), Heil
patent: 3141216 (1964-07-01), Brett
patent: 3192747 (1965-07-01), Stupell et al.
patent: 3223898 (1965-12-01), Bey
patent: 3264970 (1966-08-01), Hersh et al.
patent: 3269608 (1966-08-01), Weber, III
patent: 3292225 (1966-12-01), Burniski
patent: 3324521 (1967-06-01), Humiston
patent: 3376615 (1968-04-01), Heckman
patent: 3502318 (1970-03-01), Merz
patent: 3509734 (1970-05-01), Lederer
patent: 3618174 (1971-11-01), Schainholz et al.
patent: 3722360 (1973-03-01), Blakey et al.
patent: 3895330 (1975-07-01), Yost
patent: 3897288 (1975-07-01), Fayling
patent: 3919743 (1975-11-01), Cutler
patent: 4021891 (1977-05-01), Monta
patent: 4033013 (1977-07-01), Peterson
patent: 4200852 (1980-04-01), Aoki
patent: 4438164 (1984-03-01), Pfeifer et al.
patent: 4455719 (1984-06-01), Morita
patent: 4458395 (1984-07-01), Aoki
patent: 4480361 (1984-11-01), Morita
patent: 4593736 (1986-06-01), Morita
LandOfFree
Magnetic fastener does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic fastener, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic fastener will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1854655