Acoustic beacons
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United States of America Patent
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-
Jan 19, 1982
Grant Date -
N/A
app pub date -
Jul 7, 1980
filing date -
Jul 7, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Acoustic beacon for use at sea and having a pipe-shaped housing in the onend of which is space for a battery which drives a transmitter disposed coaxially around the housing at the other end where there is arranged a pressure switch covered by a membrane. The transmitter is switched on by the pressure switch when the pressure on the outside of the membrane exceeds a certain limit when the beacon falls in water.
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