Abstract: A retaining device has a base plate, a swingable plate and a permanent magnet. The swingable plate is swingably connected at its one end to the corresponding end of the base plate such that the other ends of the base plate and the swingable plate oppose each other. The permanent magnet is secured to the opposing end of either one of the base plate and the swingable plate. A retaining member is provided on the base plate to cooperate with the permanent magnet in retaining an object to be thereon, when the other end of the base plate or the swingable plate is held in close contact with the permanent magnet by the magnetic attracting force produced by the permanent magnet.

Abstract: A magnet clasp a stationary part and a movable part, the stationary part including a permanent magnet, ferromagnetic plates secured to the permanent magnet, a ferromagnetic pillar and a non-magnetic case and cover which encase and cover the permanent magnet and associated parts, while the movable part has a ferromagnetic plug adapted to received by a central hole of the stationary part. The magnetic attracting force acts between the permanent magnet and the ferromagnetic plug to firmly hold the stationary and movable parts only when the ferromagnetic plug is placed in the central hole of the stationary part, whereas, when the ferromagnetic plug is placed on other portions of the stationary part, no substantial magnetic attracting force is exerted.

Abstract: A magnet clasp a stationary part and a movable part, the stationary part including a permanent magnet, ferromagnetic plates secured to the permanent magnet, a ferromagnetic pillar and a non-magnetic case and cover which encase and cover the permanent magnet and associated parts, while the movable part has a ferromagnetic plug adapted to received by a central hole of the stationary part. The magnetic attracting force acts between the permanent magnet and the ferromagnetic plug to firmly hold the stationary and movable parts only when the ferromagnetic plug is placed in the central hole of the stationary part, whereas, when the ferromagnetic plug is placed on other portions of the stationary part, no substantial magnetic attracting force is exerted.

Abstract: A magnet clasp comprising a stationary part and a movable part, the stationary part including a permanent magnet, ferromagnetic plates secured to the permanent magnet, a ferromagnetic pillar and a non-magnetic case and cover which encase and cover the permanent magnet and associated parts, while the movable part has a ferromagnetic plug adapted to received by a central hole of the stationary part. The magnetic attracting force acts between the permanent magnet and the ferromagnetic plug to firmly hold the stationary and movable parts only when the ferromagnetic plug is placed in the central hole of the stationary part, whereas, when the ferromagnetic plug is placed on other portions of the stationary part, no substantial magnetic attracting force is exerted.

Abstract: A magnetic switch for attractive latch which has an attractive latch including a permanent magnet with a hole in its center, in which a ferromagnetic plate being fixed at its one side surface and a ferromagnetic plate, which has a projection in its center, being installed freely detachable at the other side, and the projection is set to be freely movable inside of the center hole of the permanent magnet, outside surface of the fixed permanent magnet being provided with a switch, which has an insulator, a fixed piece, a movable piece, and an insulator pin, moves corresponding to engaging or disengaging motion of the ferromagnetic plate, and the insulator pin is attached at the center of movable piece and is engaged or disengaged with the projection in the center hole of the permanent magnet.

Abstract: An improved magnetic locking apparatus includes two elements which are magnetically attached, whereby the first magnetic supply element both magnetically attracts the second element and engages it for being coupled therewith. The construction of the two elements permits the elements to be securely attached against accidental external forces perpendicular to and parallel to the coupled surfaces of the elements.