Patent ID: 8740491

Claim:
A locking apparatus for locking a first object to a second object, comprising: a first threaded member comprising a first threaded shank, wherein a threaded accommodating hole is defined through a center axis of the first threaded member, the first threaded shank engages in mounting holes of the first object and the second object to connect the first object to the second object; a second threaded member comprising a second threaded shank; first and second conductive pins extending from the accommodating hole through a bottom of the first threaded shank and insulated from the bottom of the first threaded shank; an alarm; and a micro-control unit comprising a power terminal connected to a first end of the first pin located outside the accommodating hole, an input/output terminal connected to a first end of the second pin located outside the accommodating hole, and a control terminal connected to the alarm; wherein when the second threaded shank engages in the accommodating hole and contacts with second ends of the first and second pins located in the accommodating hole, the first and second pins are connected to each other, such that the power terminal is connected to the input/output terminal, the micro-control unit deactivates the alarm; when the second threaded shank disengages from the accommodating hole, the first and second pins are disconnected from each other, such that the power terminal is disconnected from the input/output terminal, the micro-control unit activates the alarm.