Accession Number : ADD016105

Title :   Antenna Erector for a Towed Buoyant Cable.

Descriptive Note : Patent, Filed 24 Jul 92, patented 21 Dec 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Dickinson, Stuart C

Report Date : 21 Dec 1993

Pagination or Media Count : 6

Abstract : An apparatus is provided for erecting and stowing a communications antenna from an underwater buoyant cable. In its stowed position, the antenna is approximately parallel to the cable. In its erected position, the antenna is approximately perpendicular to the cable. A hinge, spring biased to maintain the antenna in its stowed position, is connected to the cable and to one end of the antenna. A shape memory alloy actuator is connected to the cable and the antenna. The actuator overcomes the spring bias of the hinge to raise the antenna to its erected position when energy of activation is supplied thereto. Further, the actuator allows the spring bias of the hinge to return the antenna to its stowed position when the energy of activation is removed therefrom.

Descriptors :   *ACTUATORS, *COMMUNICATION BUOYS, *UNDERWATER CABLES, ACTIVATION, ALLOYS, ANTENNAS, BIAS, ENERGY, HINGES, SHAPE, UNDERWATER, BUOYANCY, PATENTS

Subject Categories : Radio Communications
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE