Abstract: A dampener configured to augment the mounting of a lamp in a socket by resisting displacement of the lamp relative to the socket. The dampener is made from a material able to absorb vibrations and to reduce or prevent vibrations in the lamp. The dampener is made in one piece or more pieces, wherein each piece is interposable in whole or in part between the socket and the lamp base to insulate the lamp in whole or part against the vibration translated through the socket or surrounding air.

Abstract: The present invention relates to a method of and a vertical pumping device (1) for internally distributing Hg in a fluorescent tube body (3). The bottom (7) of the fluorescent tube body (3) is closed. The device (1) arranges, in a first position, a first solid body (9?) comprising a predetermined first amount of bound Hg. The device (1) arranges, in a second position, a second solid body (9?) comprising a predetermined second amount of bound Hg. A first release (E1) of the first amount of Hg is achieved in the fluorescent tube body (3) by gasification with heat and under pressure for purification of contaminant particles in the fluorescent tube body. A second release (E2) of the second amount of Hg is achieved in the fluorescent tube body (3) by gasification attained for the occluded mercury vapour of the fluorescent tube body (3).

Abstract: The present invention relates to a metal halogen lamp comprising, inside an outer casing (7), first (3) and second (5) arc tube members, which are electrically parallel-connected and are connected via conductive members (9) to a base part (11), each arc tube member having a first end (15), facing toward the top part (17) of the outer casing (7) opposite the base part (11), and a second end (19), facing toward the base part (11). The first arc tube member (3) is arranged closer to the top part (17) than the second arc tube member (5), and the second end (19) of the first arc tube member (3) and the first end (15) of the second arc tube member (5) adjoin an imaginary plane (P) defined substantially transversely to the center line (CL) of the outer casing (7), which center line extends from the top part (17) to the base part (11).

Abstract: The invention relates to a metal halogen lamp comprising an elongated arc tube enclosed in a transparent casing, wherein the arc tube is made up of a hollow glass body comprising two end portions and a middle portion, and electrode is arranged on the respective end portion, which electrodes, each having an electrode end, upon connection to a power source and during operation of the metal halogen lamp, generate an arc between them; and the glass body encloses halogens (h) and metal atoms (m) and has a wall thickness which is thicker on the end portions than on the middle portion. The thicker end portions each have a length (L1) of at least one-third of the total length (L) of the arc tube.

Abstract: The invention relates to a fluorescent lamp (1) adapted for cold environments, which comprises an elongated main tube (11), fixing devices (12) at each end of the fluorescent lamp (1) for fixing the fluorescent lamp (1) in a light fitting (27), two electrodes (15) placed inside the main tube (11), a heat-insulating outer tube (20) that surrounds the main tube (11) and creates an airspace (22) between the main tube (11) and the outer tube (20). Each fixing device (12) comprises an end cap (41) with a radial part (41b), that delimits an outer end plane of the fluorescent lamp (1), and with an axial peripheral part (41a), that is connected to an end of the outer tube (20).

Abstract: A dampener configured to augment the mounting of a lamp in a socket by resisting displacement of the lamp relative to the socket. The dampener is made from a material able to absorb vibrations and to reduce or prevent vibrations in the lamp. The dampener is made in one piece or more pieces, wherein each piece is interposable in whole or in part between the socket and the lamp base to insulate the lamp in whole or part against the vibration translated through the socket or surrounding air.

Abstract: The present invention relates to a metal halogen lamp comprising, inside an outer casing (7), first (3) and second (5) arc tube members, which are electrically parallel-connected and are connected via conductive members (9) to a base part (11), each arc tube member having a first end (15), facing toward the top part (17) of the outer casing (7) opposite the base part (11), and a second end (19), facing toward the base part (11). The first arc tube member (3) is arranged closer to the top part (17) than the second arc tube member (5), and the second end (19) of the first arc tube member (3) and the first end (15) of the second arc tube member (5) adjoin an imaginary plane (P) defined substantially transversely to the center line (CL) of the outer casing (7), which center line extends from the top part (17) to the base part (11).

Abstract: The invention relates to a metal halogen lamp comprising an elongated arc tube enclosed in a transparent casing, wherein the arc tube is made up of a hollow glass body comprising two end portions and a middle portion, and electrode is arranged on the respective end portion, which electrodes, each having an electrode end, upon connection to a power source and during operation of the metal halogen lamp, generate an arc between them; and the glass body encloses halogens (h) and metal atoms (m) and has a wall thickness which is thicker on the end portions than on the middle portion. The thicker end portions each have a length (L1) of at least one-third of the total length (L) of the arc tube.

Abstract: The present invention relates to a compact fluorescent tube (1) designed for cold spaces, which compact fluorescent tube (1) comprises at least one fluorescent tube body (13) formed into a U-shape and comprising two fluorescent tube body legs (17), which latter have an interspace (19) between them and each comprise a base part (9), enclosing a cathode chamber (11), and a top part (15) facing away from the said base parts (9), which base parts are fixed to a socket part (3), comprising current feeder members (5) for electrical contact with the cathode chambers (11). An insulating member (21, 47, 55) is arranged on the top part (15) of the compact fluorescent tube and is configured with at least one insulating cavity (23, 49), which, during operation of the compact fluorescent tube (1), is heated by the self-produced heat of the compact fluorescent tube (1).

Abstract: The present invention relates to a high pressure sodium lamp comprising an evacuated cover including a base part, an arc tube comprising a first and a second electrode each being connected to the base part via conductor members. At least one conductor member is arranged isolated by a shielding member for preventing, during operation of the high pressure sodium lamp, the photo electronic stream from the at least one conductor member to the arc tube. The lamp comprises a second arc tube.

Abstract: Compact fluorescent lamp comprising a fluorescent lamp body (3), a cathode space (9) comprising a screened space (11) around an electrode (5) arranged inside the compact fluorescent lamp (1), and a power supply device (19) so arranged as to provide an electrical connection between the electrode (5) and a contact device (21) positioned next to the contact end (13) of the compact fluorescent lamp. The screened space (11) is formed by the electrode (5) enclosing the internal wall (7) of the fluorescent lamp body (3) and by a neighboring electrode (5) and beyond it a disc-shaped cathode screen (15) in a direction away from the contact end (13) containing a central opening (17).

Abstract: The present invention relates to a high pressure sodium lamp comprising an evacuated cover including a base part, an arc tube comprising a first and a second electrode each being connected to the base part via conductor members. At least one conductor member is arranged isolated by a shielding member for preventing, during operation of the high pressure sodium lamp, the photo electronic stream from the at least one conductor member to the arc tube. The lamp comprises a second arc tube.

Abstract: Cathode unit for installation in a fluorescent tube body (3) belonging to a fluorescent tube (1), which cathode unit (5) comprises a cathode screen (15a, 15, 15?-15??) which partially surrounds an electrode (9) which is electrically insulated from the said cathode screen (15), a power supply device (11) arranged to make an electrical connection between the said electrode (9) and a contact (13), the said cathode screen (15a, 15 , 15?-15??) comprising a first end (19) facing towards the discharge, which first end (19) comprises a central opening (21), and a second end (39) facing towards the said contact (13). The first end (19) of the cathode screen (15a, 15, 15?-15??) is designed with a rounded-off part (25) in order to facilitate the insertion of the cathode unit (5) in the said fluorescent tube body (3).