Abstract: A hard-glass halogen gas-filled incandescent capsule with a single-end or a double-end has a tungsten filament with a primary coil extending from the barrel into the legs, and a secondary coil forming the barrel. One of the legs of the tungsten filament of the single-ended capsule extends into a pinch or press seal of the glass envelope to result in passive extinction of the electric arc at end-of-life. The end of the filament leg near the press seal may be connected to and/or supported by a molybdenum lead wire of the capsule that is within the pinch or the press seal via a clamp formed on the molybdenum lead wire. The passive extinction occurs when the electric arc is conducted through the filament extending into the press seal. Reliable extinction of the arc within the capsule is achieved with simplicity in construction and minimal materials. The primary coil is preferably stretched out to assume the diameter of the tungsten wire where it is embedded in a pinch seal.

Abstract: An electric lamp according to the invention comprises a lamp vessel (10) which is closed in a gastight manner, which has an end portion (11), and which surrounds a light source (12). The lamp vessel supports a cylindrical collar (30) with an axis (31) at its end portion (11). One or several projections (33a, 33b, 33c) of a first coupling member (30) which each grip into a respective recess (41a, 41c) of a second coupling member (40) couple the collar (30) to a mounting member (40) for fastening the lamp to a carrier. At least one of the coupling members (30) is made of an elastic material.

Abstract: An electrodeless low-pressure discharge lamp according to the invention has a lamp vessel (1) which is closed in a gastight manner, which contains an ionizable filling, and which has a cavity (10). In the cavity (10) an elongate coil (2) is positioned with a primary and a secondary winding (21, 22, respectively) of an electrical conductor (20) around a coil former (3) which has a tip (30) which points into the cavity (10). The electrical conductor (20) from which the secondary winding (22) is formed extends from a first end (22a) of the secondary winding (22) facing the tip (30) into a recess (32) of the tip (30) of the coil former (3) and is clamped therein. The first end (22a) of the secondary winding (22) can be easily fastened in this manner.

Abstract: An electrodeless low-pressure discharge lamp according to the invention is provided with a lamp vessel which is closed in a gastight manner and which has an ionizable filling. The lamp vessel has an end portion with a cavity in which an electric coil is accommodated. The cavity further contains a heat conductor which extends to outside the cavity and has a flange there with an axis, a circumference, a surface which faces away from the lamp vessel and a surface which faces the lamp vessel. A mounting member is connected to the lamp vessel and fastened against the flange. The mounting member is provided with at least one hook which points radially inwards and which cooperates with a recess in the surface of the flange which faces away from the lamp vessel. The recess issues into an axial groove at the circumference of the flange extending into the surface facing the lamp vessel. This construction renders possible a quick assembly of the mounting member with the flange.

Abstract: A capped electric lamp is disclosed having a cap of insulating material. The cap has a base provided with concentric contact faces which are separated by a circumferential channel. The shell of the cap has a first axial portion near the base, which has a circumferential groove and a diameter smaller than the diameter of a second axial portion remote from the base. A third narrowest axial portion may be present adjacent the base and a fourth axial portion between the first and the second, having an intermediate diameter. The capped lamp may be mounted in an electrically safe, slim push-in/push-out lampholder.

Abstract: The push-in/push-out lampholder has a guide track for an unlocking member which is permanently coupled to a fixation member. The guide track may be heart-shaped and be partly traversed by the unlocking member when a lamp cap is pressed into the lampholder. The lamp cap must be released if it is to reach an operational position under the influence of a spring. The fixation member permanently coupled to the unlocking member is then in engagement with a profile of the lamp cap and retains the lamp, pressed against contact members. It is not until a second, separate push is given that the unlocking member continues its path through the guide track. In a special embodiment, the fixation member and the unlocking member are combined into an integrated member, which may be a ball which is enclosed in inwardly narrowing bores of a cylindrical ball holder and in the guide track. The lampholder can be slim and can be manufactured mainly from metal or from synthetic resin.

Abstract: The electric reflector lamp has a reflector body with a neck. A lamp vessel containing an electric element is secured in the reflector body, held by a mounting member which has a securing portion. A lamp base is secured around the neck. The mounting member has a circumferential wall which surrounds the neck and which has relief cooperating with relief of the neck so as to couple the circumferential wall to the neck. Elastic elements of the circumferential wall seize in the recesses in the ceramic lamp base so as to secure the base. The reflector lamp is readily assembled using a small number of components.

Abstract: An electric reflector lamp is disclosed having a reflecting surface and a neck. A light source having a glass lamp vessel with a pinch seal is accommodated in the reflector body, the pinch seal being located in the neck. A mounting plate is present on the pinch seal. The plate is the bottom of a bush which extends axially along the lamp vessel towards the reflecting surface and which has a transversely extending rim which closes the neck.

Abstract: The electric reflector lamp has a molded reflector body having an optical axis. A neck is present around the axis. A light source is disposed in the reflector body, enveloped by a lamp vessel which has a seal. A metal mounting member through which the seal extends is present in the neck. The lamp has a ceramic body which surrounds the seal to lower the temperature during operation thereof. A mirroring disk may be present between the lamp vessel and the mounting member to reflect radiation away from the seal.

Abstract: The electrodeless low pressure discharge lamp has a lamp vessel (1) which is fused to the flared portion (6) of a flared tube (5) which extends into the lamp vessel. A power coupler (20) is demountably secured to the lamp vessel and comprises a soft magnetic core (21), surrounded by an electric coil (22), and a heat conducting element (23) in the core. This element is a solid rod, the coil (22) is present in a region (8) adjacent the flared portion (6) of the flared tube (5), and an elastic material couples the rod (23) laterally to the core (21). The construction of the lamp avoids the use of an expensive heat pipe as a heat conducting element.

Abstract: A high-pressure discharge lamp includes a discharge vessel which is enclosed with intervening space by an outer bulb. The lamp is provided with a starter circuit constructed as a starter unit comprising a bimetal switch and glow switch starter. The bimetal switch has a bimetal element which is fastened with a fastening point to a conductor, and rests in the cold state against a break contact point of a break contact. The fastening point and the break contact point form part of an insulating rigid body.

Abstract: The electric lamp includes a moulded reflector body (1) having a neck-shaped portion (12) which has an end portion (13). A lamp cap (2) is connected to the neck-shaped portion (12). An insulator body (5) surrounds the end portion (13). The insulator body is a ring which is wider than the lamp cap (2), and extends completely about the neck-shaped portion (12). The lamp cap (2) surrounds the end portion (13) and is directly attached thereto. The electric lamp is able to comply with an IEC requirement, while components of the lamp can be used to assemble a lamp complying with an ANSI requirement, without employing additional or different components.

Abstract: The electrodeless low-pressure discharge lamp has a lamp vessel (1) having a cavity (2) at an end portion (3) thereof. An electric coil (4) surrounding a plastic sleeve (5), wherein a liquid-filled tubular container (7) surrounded by a soft-magnetic core (6) is present, is accommodated in the cavity (2). The plastic sleeve (5) is substantially filled up with an elastic polymer. Additionally, the tube (5) may be enveloped by an elastic polymer (9). The elastic polymer ensures a relatively low operating temperature of the members inside the cavity (4).

Abstract: The electrodeless low pressure discharge lamp has a lamp vessel (1) having a cavity (3) at an end portion (2) thereof. An electric coil (4) surrounding a plastic tube (5), wherein a liquid filled tubular container (7) surrounded by a soft-magnetic core (6) is present, is accommodated in the cavity (3). The tubular container (7) is at a portion outside the cavity (3) rigidly secured in a recess (82) present in a protrusion (81) present at a flange (8). A mounting member (9) bearing the plastic tube (5) and the lamp vessel (1) is securable to the flange (8).

Abstract: The electric lamp has a lamp vessel (1), which is secured to a cylindrical collar (20). A mounting member (40) is rotatably coupled to the collar (20), in that an end portion (41) thereof which is provided with a groove (42) projects into the collar (20) and in that the collar has hooks (21) gripping into the groove (42). The groove (42) has widened and deepened portions (42') extending to outside the collar (20), giving a special tool access to the hooks (21) to disengage them from the groove (42).

Abstract: An electrodeless low-pressure discharge lamp has a tube of synthetic material in a cavity in the discharge vessel, which tube surrounds a core of magnetic material and is itself surrounded by an electric coil. The tube is bipartite, extends to outside the cavity, and has a flange which is fastened to a mounting plate and is coupled to the discharge vessel. A heatpipe extending inside the tube has a second flange clamped between the flange of the tube and the mounting plate.

Abstract: The electric lamp has a printed circuit board (7), on which a supply unit (6) is present. Contact elements (11) are connected to the printed wiring and to current supply conductors (4) to an electric element (3) of the lamp. The contact elements (11) comprise a metal strip provided with two pairs of tongues, which are in contact with the printed wiring and with a current supply conductor, respectively.