摘要:
The invention relates to an operating theater lamp comprising a housing having a light outlet opening at the bottom with a light source being arranged centrally in the housing and deflecting light all around it to a concave reflector, preferably a ring-like concave reflector arranged in the housing, which reflects the incident light rays to the light outlet opening and concentrates them as uniformly as possible onto a main light field arranged at a distance from the light outlet opening. The invention hereby provides that the concave reflector, and/or at least one auxiliary concave reflector arranged in its vicinity and in particular concentric to it, is or are so designed and/or arranged that a part of the light rays transmitted from the light source is reflected into an outer light field extending around the main light field and preferably adjoining the latter, in such a way that a brightly illuminated main light field and a stepped-down, less brightly illuminated outer light field is present.
摘要:
A nuclear reactor installation includes a reactor pressure vessel and a reactor core in the reactor pressure vessel. A supporting and protective structure supporting the reactor pressure vessel and surrounding the reactor pressure vessel on the bottom and laterally, has a bottom region and a circumferential wall. A core catcher device for the reactor core has a collecting basin for a core melt being installed below the reactor pressure vessel. The collecting basin has a bottom wall and a jacket wall being respectively separated from the bottom region and the circumferential wall of the supporting and protective structure by a spacing gap. Cooling channels are disposed in the spacing gap at the bottom wall and the jacket wall for exterior cooling of the collecting basin with a cooling liquid. Turbulence bodies are disposed in a surface region of the bottom wall for generating a turbulent flow of the cooling liquid flowing from the inside to the outside over the bottom wall toward the jacket wall. There is also a method for starting and maintaining exterior cooling of a core catcher device of a nuclear reactor installation.
摘要:
An operating theatre lamp with a main reflector (13) which illuminates the area of the operation (11) with a convergent main light beam (12) and an auxiliary reflector (15) can be arranged inside the main reflector to deflect a part of the used light beam (16) at a steeper angle to the site of the operation (11).
摘要:
Heat-insulation building block of all-metal construction variable in size and having mutually spaced thermally displaceably mounted metallic insulation foils defining insulation cells therebetween together with spacer elements holding the insulation foils at a distance from one another, as well as metal housing sheets carrying and at least partly enclosing the insulation foils and the spacer elements, including at least two building block parts nested within one another with the metal housing sheets and the insulation foils thereof having a mutual convection-inhibiting sliding fit and, in sliding direction of the mutual sliding fit, the adjacently disposed insulation foils and metal housing sheets having respective overlap lengths greater than a predetermined maximum enlargement of the building block resulting from sliding apart of the building block parts in the sliding direction.
摘要:
Lifting device for a horizontally seated cover of a nuclear-reactor pressure vessel includes a traverse having means for holding a cover to be lifted and having a substantially central point of application for a lifting tool, and means for compensating for deviations from the horizontal of the cover held by the traverse, the compensating means including a pair of mutually connected eccentrics cooperable for adjusting the point of application on the traverse in a horizontal plane.
摘要:
A nuclear reactor pressure vessel is installed in the pit of a biological shield forming a concrete wall surrounding the vessel and which defines an annular space around the vessel. A heat insulating layer of concrete surrounds the vessel within the annular space and partially fills the latter, and between the insulation and the concrete wall, steam I or H beams are vertically positioned with their flanges engaging the heat insulating layer and the concrete wall so as to support the heat insulating layer against radial motion when the pressure vessel thermally expands radially, thereby providing the latter with rupture protection. The steel beams are circumferentially interspaced very closely together and possibly with their flange edges abutting, thus forming a large number of vertically extending coolant flow passages which are open at the tops of the vertical beams around the periphery at the top of the vessel, and which are interconnected by an annular manifold at their bottom ends so that a coolant under pressure can be introduced for upward flow, thus protecting the concrete wall from excessive thermal stressing.
摘要:
The invention relates to a surgical light having at least one discharge lamp which is arranged in a lamp body and which illuminates a surgical field via a reflector, wherein a mechanically adjustable diaphragm means is provided in the lamp body for changing the intensity of illumination and includes a plurality of lamellae which are pivotable about a vertical axis and which have a light impermeable material with cut-outs.
摘要:
A medical lamp has a closed housing having a front side, a rear side and a peripheral side connecting the front side and the rear side. A light source and a reflector are provided in the housing and means are provided to reduce the heat dissipation to the outside from the rear side of the housing.
摘要:
An operating theater lamp has at least one lamp body with a discharge lamp, which illuminates a site of an operation via optical means. The illuminance of the operating theater lamp can be changed in the region of the site of the operation by a mechanically adjustable diaphragm means. The adjustable diaphram means has adjustable lamellae that extend along a longitudinal axis of at least one discharge lamp. The adjustable lamellae pivot about a longitudinal axis. The adjustable diaghragm means include openings that restrict a maximum dimming effect of the adjustable diaghrahm means.
摘要:
The invention relates to a medical lighting unit for clinical use comprising a lighting unit body containing at least one lamp and having at least one light outlet side, with the lighting unit body being vertically adjustably mounted on at least one flexible, coilable tensile carrying element supported on a room wall, in particular on the room ceiling. The tensile carrying element is connected at one end to the lighting unit body and at the other end to a drive unit secured to the room wall and containing a drive motor for extending and retracting the tensile carrying element, with the tensile carrying element extending vertically between the drive unit and the lighting unit body. The invention lies in the fact that the carrying element is a single chain with measures being taken, or means being provided, in order to be able to set the lighting unit body in a desired illuminating position despite the single chain suspension.