Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1993-11-12
1995-04-11
Swann, Glen
Communications: electrical
Condition responsive indicating system
Specific condition
340541, 340652, G08B 13187
Patent
active
054062632
ABSTRACT:
A simple trip-wire or magnetic circuit associated with a shipping container monitors continuity, which is detected electrically. Simply, if continuity is disabled by a forced entry of the container, electrical detection means, such as a radio-frequency-identification (RFID) tag, will alert the owner or monitoring station. The trip-wire concept would require the replacing of a broken trip wire (resulting from forced entry), while the magnetic circuit concept can be reused repetitively. In a second embodiment a magnetic circuit and the detection device (RFID tag) are embedded into the shipping article during manufacturing. The preferred detection device, an RFID tag, could also be a battery backed transceiver type on which a replaceable or rechargeable battery could be mounted on the inside of the shipping container during manufacturing. The RFID tag would communicate with an interrogator unit, which could be connected to a host computer. The interrogator and/or the host computer and/or other alarm devices would then monitor the shipping container's status (opened or closed).
REFERENCES:
patent: 3426166 (1969-02-01), Canceill
patent: 4262284 (1981-04-01), Stieff et al.
patent: 5111184 (1992-05-01), Heaton et al.
patent: 5169188 (1992-12-01), Kupperman et al.
patent: 5189396 (1993-02-01), Stobbe
Micron Communications Inc.
Paul David J.
Swann Glen
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