Tokyo Shibaura Denki Kabushiki Kaisha

Hisao Ishiwata

Tetsu Sano

Yoshimitsu Aramaki

Tatsuo Simizu

Takezou Yasuzuka

Tatuo Shimizu

A vacuum vessel, used for such as an X-ray image intensifier, is provided with a radiation-permeable window member prepared from titanium or alloys thereof. The window member is supported on a support frame of iron or alloys thereof by resistance welding. A method of manufacturing the vacuum vessel comprises the steps of: successively spot welding the periphery of the window member by resistive heating to a support frame made of iron or alloys thereof with a pressure of 40-200 kg/cm.sup.2 while interposing a metal foil insert member having a lower melting point than the transformation point of the window member between the window member and the support frame; and hermetically sealing the periphery of the window member in the support frame.

Method of manufacturing a vacuum vessel provided with a

In an image intensifier comprising an evacuated envelope which comprises a cylindrical vessel, an input window member airtightly sealed to one end of the vessel, and an output container formed at the other end of the vessel, at least said one end portion of the cylindrical vessel is formed of metal, the input window member has a multilayer structure including an outer thin plate formed of metal weldable to the metal which constitutes at least said one end portion of the cylindrical vessel and an inner thin plate formed of aluminum or aluminum alloy which is thicker than the outer thin plate, the peripheral portion of the inner thin plate is pressure-bonded to an inner portion of a flange at the one end portion of the cylindrical vessel, and the peripheral portion of the outer thin plate extends beyond the peripheral portion of the inner thin plate and is fused with an outer portion of the flange.

Growing community of inventors

Kamakura, Japan

Hisao Ishiwata