Emergency transmitter buoy for use on marine vessels
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United States of America Patent
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-
Jun 8, 1993
Grant Date -
N/A
app pub date -
Oct 24, 1991
filing date -
Oct 24, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An emergency position indicating radio beacon ('EPIRB') includes a watertight housing with an ON-OFF switch on the outside of the housing which does not require holes through the housing wall. A floatation collar on the housing maintains the EPIRB in an upright position in the water and provides a storage cavity for a lanyard. Conductive grids on the interior of the housing either shield the EPIRB electronics from antenna radiation and form the lower half of the antenna, or couple the antenna to the water which acts as a ground plane, depending on whether the EPIRB is floating in the water or is surrounded by air.
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