Emergency transmitter buoy for use on marine vessels
US5218366A · kind A · utility
45Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1991 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Oct 24, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H3/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.