Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1991-10-24
1993-06-08
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
441 11, 441 80, 455128, 200549, G01S 100, B63B 2200, B63C 900, H01H 1506
Patent
active
052183661
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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patent: 3790912 (1974-02-01), Murphy
patent: 4101894 (1978-07-01), Warner et al.
patent: 4484041 (1984-11-01), Andres et al.
patent: 4777656 (1988-10-01), Wade
patent: 4976641 (1990-12-01), D'Amico
patent: 4981453 (1991-01-01), Krishan et al.
patent: 5034847 (1991-07-01), Brain
patent: 5067920 (1991-11-01), Brisky
Cardamone David P.
Keohane Eugene F.
Malloy Robert J.
Muir Robert L.
Paulovitz Albert C.
Issing Gregory C.
Lett Gerald L.
Litton Systems Inc.
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