Abstract: A lamp includes an envelope of a vitreous composition, having a pinched part at least one end to form a seal isolating an interior of the envelope from the environment of the envelope, and an arrangement for conducting electrical current to the interior of the envelope, having a section embedded in one of the pinched parts of the envelope and a section external to the envelope. At least part of embedded section of the arrangement for conducting electrical current is at least partly surrounded by a composition including at least one of phosphorus in a non-volatile form and an acid thereof.

Abstract: A lamp includes an envelope of a vitreous composition, having a pinched part at at least one end to form a seal isolating an interior of the envelope from the environment of the envelope, and an arrangement for conducting electrical current to the interior of the envelope, having a section embedded in one of the pinched parts of the envelope and a section external to the envelope. At least part of embedded section of the arrangement for conducting electrical current is at least partly surrounded by a composition including at least one of phosphorus in a non-volatile form and an acid thereof.

Abstract: A high-pressure discharge lamp comprising an outer envelope (1) accommodating a discharge vessel (11) having a wall with an inner and an outer surface arranged around a longitudinal axis (22); the discharge vessel enclosing, in a gastight manner, a discharge space (13) provided with an ionizable filling; the discharge vessel having first and second, mutually opposite end portions (2, 3) through which a first and a second current-supply conductor (4, 5), respectively, extend to a pair of electrodes (6, 7) arranged in the discharge space. The lamp according to the invention has the special feature that the discharge vessel is provided with a weakening line (20) extending along at least a part of the circumference of the discharge vessel (11) so as to allow the discharge vessel to break into two parts along said weakening line in the case of breakage of the discharge vessel.

Abstract: An electric lamp has a lamp vessel accommodating an electric element. The element is connected to current conductors including molybdenum portions which have a coating of material chosen from the group of chromium-manganese, chromium-cobalt, chromium-iron and chromium-boron alloys as a protection against oxidation.