Self-check for a detector detecting the proximity of a transportation vessel
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United States of America Patent
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May 11, 2004
Issued Date -
N/A
app pub date -
Jun 3, 2002
filing date -
Apr 4, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A frequency detector that detects a frequency signal indicative of the proximity of a transportation vessel or an intrinsically-safe area. The frequency detector may be associated with any type of electronic device. The frequency detector detects the presence of a frequency signal that is emitted by a transportation vessel and/or a frequency beacon associated with the transportation vessel. The frequency detector and/or container may disable, shut down, or reduce power of any electro-magnetic field generating devices associated with the frequency detector and/or container if the frequency detector receives a frequency signal indicative of the inside or proximity of a transportation vessel or an intrinsically-safe area. The container also includes a self-check frequency generator that emits a frequency signal capable of being detected by the frequency detector. If the frequency detector is operating properly, the frequency detector will successfully receive the frequency signal emitted by the frequency generator.
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