Thomson-csf

Thomson-brandt

Compagnie Des Lampes

Didier Grauleau

Arvind Shroff

Dominique Henry

Jacques Villain

Jean Mourier

This invention pertains to a travelling wave tube with a helix-type delay line attached to a sleeve through the use of boron nitride dielectric supports, which have a layer of insulating material with a secondary emission coefficient greater than 1, such as aluminum or beryllium oxide, for example.

Travelling wave tube with a helix-tube delay line attached to a sleeve

A complementary grid made from a volatile material is formed on the surface of the cathode, which is then covered with the material of the grid (parts 5 and 6). After the volatilization of the complementary grid there leaves an integrated grid (part 6) on this surface.

Process for producing an impregnated cathode with an integrated grid,

A device for collecting solar energy and conveying it to a zone to be heated. It comprises a tube in two parts, the first part (evaporator) being surrounded by a vacuum and being covered with a heat absorbing material and exposed to the solar radiation. The tube contains a fluid which vaporized in the first part and absorbs heat and condenses in the second part and gives up the previously-stored heat. The fluid in the liquid phase is returned to the first part by a capillary system.

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Paris, France

Didier Grauleau