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Emergency transmitter buoy for use on marine vessels

  • US 5,218,366 A
  • Filed: 10/24/1991
  • Issued: 06/08/1993
  • Est. Priority Date: 10/24/1991
  • Status: Expired due to Fees
First Claim
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1. An emergency radio beacon comprising transmitter electronics contained in a housing and an external antenna for radiating radio signals, the beacon comprising:

  • a conductive shield surrounding the transmitter electronics, wherein the conductive shield forms the second half of an antenna in which the external antenna is the first half;

    a two-position sliding element on the exterior of the housing for controlling the transmitter electronics;

    a magnet mounted on the two-position sliding element;

    a magnetic switch mounted on the inside of the position and closed in the other position of the two-position sliding element; and

    a plurality of conductive grids and a battery in the housing which form the conductive shield.

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