Abstract: A shoe device. The device includes a shoe body such as a sports shoe and a coupling plate removably mounted on the shoe body. The coupling plate has a lower side mounted with a sporting device suitably used for various sports, such as a skate, an in-line skate, a roller skate or the like. The shoe body has a coupling hole and an engaging groove formed on a base portion of the shoe body, whereas the coupling plate has an upper side formed with a coupling protrusion and an engaging groove. The shoe body and the coupling plate are strongly coupled by engaging the coupling protrusion of the coupling plate with the coupling hole of the shoe body, and by inserting a fixing member between the engaging groove of the shoe body and the engaging groove of the coupling plate.

Abstract: A lock device includes a lock body with a lock shell, a key plug received in the lock shell, and an anti-dusting cover assembly secured on a front end of the lock shell. The key plug has a front end which is formed with a recess that has an end wall which is formed with a keyhole. The cover assembly includes a cover plate with a key slot that is aligned with the keyhole, and an anti-dusting plate mounted pivotally to a rear wall surface of the cover plate. A magnet is mounted on a rear wall surface of the anti-dusting plate. A magnetic conductor is provided on the front end of the key plug in a pivoting direction of the anti-dusting plate. A magnetic reed switch is provided on the lock shell and is normally disposed adjacent to the magnetic conductor. The magnetic reed switch is activated by the magnet via the magnetic conductor when the anti-dusting plate pivots rearwardly to locate the magnet adjacent to the magnetic conductor due to insertion of an article into the keyhole of the key plug.

Abstract: A safety cover plate for covering an electric socket includes an external plate member with an opening aligned with the receptacle. The sliding plates are slidably mounted to the inside of the external plate member to shield the opening of the external plate member. A biasing member is provided to urge the sliding plates to engage and shield the opening. The sliding plates are mounted between two rails. A notch misaligned with the slots of the receptacle is formed on one of the sliding plates so that a user can separate the two sliding plates from each other and insert a plug into the receptacle.

Abstract: A lock includes a hollow lock body with a plurality of aligned first transverse holes, a cylindrical key plug rotatably disposed inside the lock body and having a plurality of second transverse holes aligned with the first transverse holes, and a plurality of tumbler pins extending into each set of aligned first and second transverse holes. The lock further includes a first control switch actuated by inserting a key into the key plug, a second control switch actuated by rotating the key plug relative to the lock body, and an electrical control circuitry including a first timer circuit connected to the second control switch, a second timer circuit connected to the first control switch, a warning device and an electromagnetic control unit both actuated by the second timer circuit. The first timer circuit disables the second timer circuit for a predetermined time period when the first timer circuit is actuated.