Alcatel

Bertrand Brevart

Thierry Youssefi

Michel Maignan

Philippe Charbonnier

Michel Blanquet

Vincent Barbet

Frédéric Rouchaud

Damien Pacaud

Emmanuel Bodin

The invention relates to a rigid multilayer material for thermal insulation, in particular in a vacuum, the material comprising at least one insulating plate of honeycomb material sandwiched between two aluminum- or gold-coated skins of low emissivity. In order to optimize thermal insulation, the diameter of the cells is at least twice their height. The multilayer material may have as many layers as needed. The cells of adjacent layers may be offset in order to further minimize paths for heat conduction through the structure. Holes may be pierced in the side walls of the cells in order to allow them to empty out when the material is put into a vacuum. The invention also provides a method of making such a material.

Rigid multilayer material for thermal insulation

A resonant cavity device comprises a waveguide body having a lateral wall extending in a longitudinal direction, having a first coefficient of thermal expansion, and delimiting a resonant cavity in conjunction with opposite first and second end walls. The first end wall has a second coefficient of thermal expansion lower than the first coefficient and has an internal face fastened to a first assembly comprising at least one main plate having a third coefficient of thermal expansion lower than the first coefficient and dimensions in a plane perpendicular to the longitudinal direction less than but substantially equal to those of the cavity. An intermediate member has a fourth coefficient of thermal expansion lower than the third coefficient and an end portion fixed to the main plate which, in the event of a temperature variation, converts a dimensional variation in a direction perpendicular to the longitudinal direction into a dimensional variation in the longitudinal direction inducing longitudinal translation of the main plate inside the cavity.

Resonant cavity device converting transverse dimensional variations induced by temperature variations into longitudinal dimensional variations

A structure for reducing shock transmitted from a source ( ) to an equipment unit ( ) in a hardware system, which structure includes a honeycomb cellular support member ( or ) carrying the equipment unit to be protected from shock and/or the source. At least some of the honeycomb cells are filled with rigid microgranules whose dimensional characteristics are preferably heterogeneous, within given limits.

Shock reducing structure

Fixing arrangement with damping for a device which is protected from

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Toulouse, France

Bertrand Brevart