Abstract: The method of making a vacuum tube collector or X-ray tube, which includes a matching glass-metal joint, includes providing a glass tube (1) made of a glass with a composition, in percent by weight on the basis of oxide content, consisting of B2O3, 8-11.5; Al2O3, 5-9; Na2O, 5-9; K2O, 0-5; CaO, 0.4-1.5; balance, SiO2; and bonding, preferably fusing or melting, an end portion of the glass tube (1) with a metal part (2) in order to bond or attach the glass tube to the metal part, thus forming a long-lasting glass-metal joint. The method of making the glass-metal joint is performed without using intermediary glass compositions of varying thermal conductivities. In the case of the vacuum tube collector the method can provide the basis for an automated manufacture of the vacuum tube collector.

Abstract: The present invention relates to a method for producing a glass body with at least one inner tube which is closed off on one side and one outer tube which is closed off at least on one side, with the inner tube being connected not coaxially with the floor of the outer tube and the inner tube comprising an opening, with the inner tube being fixed in the outer tube in such a way that the outer tube comprises a projecting portion, a floor is formed by the projecting portion on the outer tube, an opening is formed by the removal of the glass on the inner tube, and the outer tube is evacuated at the end and molten off.

Abstract: The method of making a vacuum tube collector or X-ray tube, which includes a matching glass-metal joint, includes providing a glass tube (1) made of a glass with a composition, in percent by weight on the basis of oxide content, consisting of B2O3, 8-11.5; Al2O3, 5-9; Na2O, 5-9; K2O, 0-5; CaO, 0.4-1.5; balance, SiO2; and bonding, preferably fusing or melting, an end portion of the glass tube (1) with a metal part (2) in order to bond or attach the glass tube to the metal part, thus forming a long-lasting glass-metal joint. The method of making the glass-metal joint is performed without using intermediary glass compositions of varying thermal conductivities. In the case of the vacuum tube collector the method can provide the basis for an automated manufacture of the vacuum tube collector.

Abstract: The invention relates to a method for the interior metal-coating of glass tubes, with the metal-coated surface being a cylindrical shell. In accordance with the invention such a method comprises the following process steps: the glass tube is sealed off at either end; the glass tube is brought to a horizontal position: a sensitizer solution is introduced into the interior space of the glass tube in such a quantity that the interior space is only partly filled; the sensitizer solution is removed from the interior space after a certain dwell period; a mirror-coating solution is introduced into the interior space of the glass tube, with the entire interior surface of the glass tube being wetted by the mirror-coating solution; the used-up mirror-coating solution is removed from the interior space of the glass tube.

Abstract: The invention relates to a method for the interior metal-coating of glass tubes, with the metal-coated surface being a cylindrical shell.

Abstract: The present invention relates to a method for producing a glass body with at least one inner tube which is closed off on one side and one outer tube which is closed off at least on one side, with the inner tube being connected not coaxially with the floor of the outer tube and the inner tube comprising an opening, with the inner tube being fixed in the outer tube in such a way that the outer tube comprises a projecting portion, a floor is formed by the projecting portion on the outer tube, an opening is formed by the removal of the glass on the inner tube, and the outer tube is evacuated at the end and molten off.