Abstract: An electrical illumination device for generating saturated colors with at least two illumination units. The illumination units each have a discharge vessel with a low-pressure discharge and a phosphor coating on the inner wall of the vessel, characterized in that at least one illumination unit has a discharge vessel with a xenon fill and a dielectric barrier discharge.

Abstract: In the dielectric barrier discharge lamps according to the invention, the elongate, for example strip-like or linear, electrodes are each separated into two electrode elements (14a, 14b; 15a, 15b) by a gap in the longitudinal direction. This makes it possible, as intended, to operate one element (14a, 15a) of the electrode elements separately from the other element (14b, 15b) and, as a result, to cause either only one part of the lamp to illuminate or the entire lamp. For this purpose, one element (14a, 15a) of the electrode elements is connected to a first operating device (22), and the other element (14b, 15b) to a second operating device (21).

Abstract: The invention relates to contact-making of dielectrically impeded discharge lamps by means of a mechanical procedure with plastic deformation of a contact surface 17. It is thus possible to dispense with thermal steps such as soldered connections or welded connections and to therefore make savings in terms of time and on the complexity of the apparatus used.

Abstract: In the case of a dielectric barrier discharge lamp, the discharge vessel (1) is composed of an outer bulb (3) and an inner bulb (4) arranged within the outer bulb, with the result that a discharge space (8) filled with a discharge medium is formed between the inner and the outer bulb. Strip-like electrodes (11) are arranged on the outer side, which is remote from the discharge medium, of the wall of the inner bulb (4). Since there are no longer inner electrodes having a dielectric coating and there is no gas-tight current bushing, this concept combines simple manufacture with protection of the outer electrodes, for example against electric shock.

Abstract: An electrical illumination device for generating saturated colors with at least two illumination units, the illumination units each having a discharge vessel with a low-pressure discharge and a phosphor coating on the inner wall of the vessel, characterized in that at least one illumination unit has a discharge vessel with a xenon fill and a dielectric barrier discharge (R, G, B).

Abstract: In the dielectric barrier discharge lamps according to the invention, the elongate, for example strip-like or linear, electrodes are each separated into two electrode elements (14a, 14b; 15a, 15b) by a gap in the longitudinal direction. This makes it possible, as intended, to operate one element (14a, 15a) of the electrode elements separately from the other element (14b, 15b) and, as a result, to cause either only one part of the lamp to illuminate or the entire lamp. For this purpose, one element (14a, 15a) of the electrode elements is connected to a first operating device (22), and the other element (14b, 15b) to a second operating device (21).

Abstract: A coupling element (2) is proposed for the combining of at least two elongate lamps with in each case two ends. For this purpose, the coupling element (2) has a continuous receptacle area which is provided for receiving an end of each lamp. The receptacle area comprises a reflector (6) in order to reduce the luminance decrease in the region between the lamp ends. With one or a plurality of coupling elements according to the invention in conjunction with two or more elongate lamps, illumination systems having different luminous lengths can be realized in a modular manner.

Abstract: A dielectric barrier discharge lamp having electrodes arranged on the wall of the discharge vessel has a VUV/VIS reflection layer (6) made of a material with a high secondary electron emission coefficient on at least a part of the inner wall of the discharge vessel. A luminescent material layer (7) is in turn applied on the VUV/VIS reflection layer (6). Moreover, at least one partial region (8) without luminescent material is provided in the luminescent material layer (7), this at least one partial region (8) partially uncovering the underlying VUV/VIS reflection layer (6) and additionally being arranged at least in direct proximity to one or more electrodes (4) of the lamp. As a result, the ignition behavior of the lamp is improved, in particular during ignition in darkness.

Abstract: A dielectric barrier discharge lamp (1) having a tubular discharge vessel (2) and a luminescent material layer on at least a part of the inner wall of the discharge vessel (2) and having elongate electrodes (3) is provided with a coating (10) on a partial region of the inner wall at least at one end of the tubular discharge vessel (2), which coating additionally covers an end of at least one elongate electrode (3). The material of said coating (10) has a high secondary electron emission coefficient. As a result, the ignition behavior of the lamp is improved, in particular during ignition in darkness.

Abstract: In order to improve the starting of a dielectric barrier discharge lamp it is proposed to provide means for igniting an auxiliary discharge inside the exhaust tube (5) of the lamp.

Abstract: Dielectric barrier discharge lamp having a starting aid A dielectric barrier discharge lamp has elongated electrodes (3) that are arranged on the inside of the wall of the discharge vessel (2) and are covered by a dielectric layer (4). Arranged on the outside of the wall of the discharge vessel (2) is an electrically conductive means (8) that is limited with reference to the longitudinal axis to a subregion (B) of the discharge vessel wall, for example a metal ring. The startability of the dielectric barrier discharge lamp when first being started or after long operational pauses is improved thereby.

Abstract: Dielectric barrier discharge lamp The discharge tube (1) of a dielectric barrier discharge lamp is closed off in a gas-tight manner with the aid of a disk-like closure element (7) but without the use of joining means. For this purpose, the discharge tube (1) has a constriction (10), which surrounds the edge of the disk-like closure element (7) in the form of a ring.

Abstract: In a liquid-cooled generator including a generator structure disposed in a housing in spaced relationship therefrom so as to form a narrow space between the generator structure and the housing wherein the housing has inlet and exit opening for conducting a coolant through the annular space, a restriction is disposed in the annular space between the inlet and the exit openings and the inlet opening extends essentially tangentially to the inner wall of the generator housing so as to establish in the annular space an essentially circumferential coolant flow.

Abstract: In a valve actuating system for a multicylinder internal combustion engine having a camshaft supported in bearing pedestals on the cylinder head of the engine with rocker arms pivotally supported by rocker arm support shafts also mounted on the bearing pedestals and coupling levers arranged adjacent at least some of the rocker arms and including hydraulically operable coupling devices for engagement with the adjacent rocker arms, at least one of the bearing pedestals includes a pressure control space to which oil under pressure is supplied and the rocker arm support shafts have internal fluid flow passages in communication with the pressure control space and with the coupling devices so that pressurized fluid can be admitted to the coupling devices under the control of valve means disposed in the bearing pedestal.

Abstract: The invention resides in a hollow rocker-arm shaft with multiple internal passages for an internal combustion engine which rocker-arm shaft consists of two shell sections forming circular segments which are welded together by a weld seam extending along the longitudinal edges of the circular segments and at least one dividing wall extends through the interior of the hollow shaft between the weld seams and divides the interior of the hollow shaft into at least two passages.

Abstract: In a method of minimizing the play in a valve operating mechanism having first and second valve operating rocker arms mounted side-by-side on a support shaft wherein each rocker arm has one end disposed on a cam of a cam shaft to be actuated thereby and, the first rocker arm has its opposite end disposed on a gas-change valve for operating the valve while the second rocker arm has at its opposite end a coupling bore disposed adjacent a coupling bore formed in the first rocker arm and a coupling pin is arranged in the coupling bore of one of the rocker arms and projects into the bore of the other for engagement of the rocker arms with one another, the two rocker arms are mounted in a coupled state on the shaft of a measuring arrangement, a force is then applied to the valve engaging end of the first rocker arm for firmly biasing the first rocker arm against a base circle location of its associated cam and a force is applied to the one end of the second rocker arm to force it away from its associated cam into f

Abstract: In an apparatus for valve actuation in a multi-cylinder internal combustion engine, a valve is actuated by two actuation levers which can be coupled together by coupling elements. The actuation levers are driven by two cams with different cam protrusions. In order to avoid wear-causing incomplete coupling for all the coupling elements when the cam protrusions become effective, their triggering for coupling and decoupling only takes place within an interval of time fixed with respect to the camshaft position. When the cam protrusions become effective, the coupling or decoupling procedure is either concluded or at least a sufficient overlap of the coupling elements is produced.

Abstract: In a cylinder-head-mounted camshaft bearing structure for an internal combustion engine in which the camshaft bearings are mounted on the cylinder head by bearing caps arranged in spaced relationship from one another and the bearing caps have aligned mounting holes receiving rocker-arm support shafts for pivotally supporting the rocker arms between said bearing caps and the bearing caps are further interconnected by longitudinal webs so as to form an integral frame-like bridge unit, transverse webs are disposed between said caps in spaced relationship therefrom and interconnect the longitudinal webs so as to define between the transverse webs and between the webs and the adjacent bearing caps spaces receiving the rocker arms.

Abstract: In a valve operating system for an internal combustion engine with overhead valves and a camshaft supported by a bearing bracket mounted on the cylinder head for the actuation of the valves via a rocker arm arrangement comprising for at least one of the valves a main rocker arm and adjacent thereto an auxiliary rocker arm adapted to be coupled to the main rocker arm for superimposing its movement as controlled by its associated cam structure onto the main rocker arm which operates the associated valve, a spring supporting element which engages the auxiliary rocker arm so as to maintain it in contact with the associated cam structure engages with its one end the auxiliary rocker arm and is supported with its other end on said bearing bracket.

Abstract: A valve actuation appliance for an internal combustion engine having an actuation lever and a coupling lever which can be coupled thereto. The levers are driven by different cams. In order to prevent coupling of the two levers in a region relative to the camshaft position, particularly when it is not certain that the coupling procedure will be concluded without interruption, it is proposed that the base circle of one of the two cams be lowered in that region by a slight amount relative to the rest of the base circle.