Patent ID: 7543467
Filing Date: 2009-06-09
Classification: E05B,G01S,Y10T

Abstract:
1. A portable locking device comprising: (a) a housing for retaining a cylindrical latching mechanism, said cylindrical latching mechanism comprising a first end, a first electrically non-conductive spacer, an electrically conductive catch portion, a second electrically non-conductive spacer, and an electrically conductive second end; (b) said first end of the cylindrical latching mechanism comprising a lock mechanism capable of interacting with a cooperating portion of the housing to lock the cylindrical latching mechanism in place relative to the housing; (c) said cylindrical latching mechanism positionable between a normal locked position when the lock mechanism is locked, and an unlocked position when the lock mechanism is unlocked; (d) said housing further defining an opening to the second end of the cylindrical latching mechanism; (e) said housing further comprising a latch cavity, said latch cavity opening onto the catch portion of the cylindrical latching mechanism; (f) a flexible cable having proximate and distal ends and an insulated electrically conductive wire within the cable, said insulated wire running from the proximate end to the distal end of the flexible cable, said flexible cable connected at the proximate end to the electrically conductive second end of the cylindrical latching mechanism through the opening in the housing, said flexible cable further connected at the distal end to a latch sized to be removably received within said latch cavity; (g) said latch comprising an electrically conductive bolt extending therefrom, and one or more magnets about its periphery, said electrically conductive bolt electrically connected to the insulated wire at the distal end of the flexible cable; (h) said bolt being electrically connected to and retained by contact with the catch portion of the cylindrical latching mechanism when the latch is inserted within the latch cavity and the cylindrical latching mechanism is in the normal locked position, and said bolt not being electrically connected to or retained by the catch portion of the cylindrical latching mechanism when the latch is inserted within the latch cavity and the cylindrical latching mechanism is in the unlocked position; (i) a wireless transmitter housed within said housing; (j) a power source housed within said housing; (k) a normally open magnetic contact switch housed within the housing adjacent to the latch cavity; (l) an armed circuit and a disarmed circuit, said armed and disarmed circuits being parallel electrical circuits; (m) said armed circuit being completed only when the latch is inserted within the latch cavity and the cylindrical latching mechanism is in the locked position said armed circuit comprising, in series, the power source, the wireless transmitter, the normally open magnetic contact switch, the catch portion of the cylindrical latching mechanism, the bolt of the latch, the insulated wire of the flexible cable, and the second end of the latching mechanism; (n) said disarmed circuit being completed only when the cylindrical latching mechanism is in the unlocked position, said disarmed circuit comprising, in series, the power source, the wireless transmitter, and the catch portion of the cylindrical latching mechanism.