Tamper-proof device for detecting opening and closing of a secure container
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United States of America Patent
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-
May 5, 1992
Grant Date -
N/A
app pub date -
Feb 25, 1991
filing date -
Feb 25, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tamper-proof device for detecting opening and closing events of a secure container is characterized by a fiber optic cable having a first portion connected with a fixed member of the container and a second portion connected with a movable locking member of the container so that the cable is bent or flexed when the container locking member is moved between open and closed positions. Light pulses are transmitted through the cable and variations in the pulses resulting from bending of the cable are detected to indicate opening and closing of the container.
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