Hughes Electronics Corporation

Steven A McPhilmy

Harry M Johnson

Ghassan Zamat

Mark Wickham

Jack Lundstadt

A hydrogen getter device includes a package made from a material that is hydrogen permeable and moisture impermeable. A preferred hydrogen getter is a particulate zeolite having a portion of its sodium ions exchanged by an activated metal, such as silver. The package can be a flexible enclosure made from the hydrogen permeable moisture impermeable sheet material and surrounded by a porous protecting material. In one embodiment, the package includes an internal wall to define a first enclosure containing the hydrogen getter and a second enclosure containing a moisture absorbing agent or desiccant, such as a zeolite. The package is suitable for use in electrical enclosures having an internal volume of about 5 liters to about 100 liters or more.

Hydrogen getter package assembly

A protective coating for reflectors and a feed of a satellite terminal. The protective coating includes a multiplicity of removable sheets that can be removably attached to any of the reflective surfaces of the reflectors or to the transmitting or receiving surface of the feed, which can be referred to as the critical surfaces of the satellite terminal. The sheets can be removed one at a time when the uppermost sheet becomes dirty. Each sheet includes a substrate layer made of a suitable material such as mylar or polyester, a metallic layer on top of the substrate layer that can be, for example, specular aluminum or silver, an ultraviolet stable hydrophobic layer, such as acrylic, on top of the metallic layer, and a mild adhesive layer beneath the substrate layer allowing each sheet to be removed from the remaining sheets. The bottom sheet is attached to one or more of the critical surfaces of the satellite terminal and has a thermal coefficient of expansion substantially equal to that of the critical surface to which it is attached. The protective coating can cover either the entire reflective surface of each reflector of the satellite terminal, or only a portion of each reflective surface. Each sheet can be removed by hand without special tools.

System and method for restoring performance to a weathered satellite terminal

A method and apparatus for unambiguous, precise and self-calibrating detection of unreliable semiconductor operation is provided. The apparatus includes an optically coupled sensor positioned over a semiconductor device and an electrical feedback control loop for adjusting the operating range of the semiconductor device. The method includes the steps of measuring optical emissions from a semiconductor device and adjusting compensation circuitry connected to the semiconductor device in response to the measured emissions.

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Frederick, MD, United States of America

Steven A McPhilmy