Abstract: A surgical microscope (100) has a viewing optic (101, 104, 115) which allows a viewing person to view the enlarged display of an object region (116) in a viewing area (117). The viewing optic (101, 104, 115) has a continuously adjustable magnification system (104) with which a viewing optic adjusting unit (119) is associated. The surgical microscope (100) has an adjustable illuminating system (150), which provides illuminating light (151) for the object region (116), to illuminate the object region in an illuminated area (152) using illuminating light (151) of adjustable radiation intensity. An illumination system control unit (175) is provided in the surgical microscope (100), the control unit being connected to the viewing optic adjusting unit (119) for receiving information as to the adjusted magnification of the viewing optic (101, 104, 115).

Abstract: A surgical microscope (100) has a viewing optic (101, 104, 115) which allows a viewing person the enlarged display of an object region (116) in a viewing area (117). The viewing optic (101, 104, 115) has a continuously adjustable magnification system (104) with which a viewing optic adjusting unit (119) is associated. The surgical microscope (100) has an adjustable illuminating system (150), which provides illuminating light (151) for the object region (116), in order to illuminate the object region in an illuminated area (152) using illuminating light (151) of adjustable radiation intensity. An illumination system control unit (175) is provided in the surgical microscope (100), the control unit being connected to the viewing optic adjusting unit (116, 117) for receiving information as to the adjusted magnification of the viewing optic (101, 104, 115).

Abstract: A radiation-emitting optoelectronic component (1) which is connected to a heat sink (3) and is intended for pulsed operation with the pulse duration D, and in which temperature changes of the optoelectronic component (1) take place with a thermal time constant ? during pulsed operation. The thermal time constant ? is matched to the pulse duration D in order to reduce the amplitude of the temperature changes.

Abstract: A laser diode component comprising a laser diode bar on which a specific operating voltage is impressed during operation and with which a bridging element is connected in parallel, which bridging element is in a current-blocking state when the specific operating voltage is impressed on the associated laser diode bar and which bridging element changes over to a current-conducting state as soon as the voltage drop across the laser diode bar exceeds the operating voltage by a predefined voltage value. A circuit arrangement comprising a plurality of such laser diode components which are connected in series is furthermore specified.

Abstract: A method for forming a clamping device comprising of a swiveling body made of plastic, a plain bearing bushing mounted radially inside the plastic swiveling body, a rolling bearing for mounting a clamping roll arranged eccentrically to the bearing bushing, the edges of the plain bearing bushing being wound out of a strip, and joined to each other under intrinsic tension in the area of the butt joint; and, wherein, the lateral surface of the plain bearing bushing and the bore surface of the rolling bearing function as parts of a mold for the injection-molding of the swiveling body and consisting of the steps of placing the rolling bearing assembly and a plain bearing bushing in a mold half in eccentric relation to one another, placing a second mold half over the plain bearing bushing and rolling bearing configured to form ring-shaped projections to hold rolling bearing in a predetermined axial position relating to the bearing bushing, and injecting a plastic material with the mold closed to form the swivel bod

Abstract: A support body used in a tensioning device includes a support element and a bottom plate. The support element is attached to the bottom plate in a radially and axially form-fitting and fixed manner through use of a plastic element that is molded into place by extrusion. The plastic element engages a groove formed in the outer surface of the support element and also engages through holes formed in the bottom plate.

Abstract: An arrangement for fixing a tubular element, such as a shaft, that is provided with a bore and a flange in position with respect to plate element involves the use of a ball that pressed into the bore in the tubular element. To achieve a simple fixation that is secure in both axial directions, the plate element is fixed on one side by the flange of the tubular element and on the other side by the bulge that is created through insertion of the ball into the bore in the tubular element. The ball has a greater diameter than that of the bore in the tubular element so that insertion of the ball into the bore causes the tubular element to become enlarged, thus forming the bulge.

Abstract: Before the exposure of a film, the brightness of the miscroscope image is determined with a sensor by multiple constant (.tau.) which characterizes the dependence of the microscope image with time is determined. The film is subsequently exposed for a single exposure time (D.sub.c) which takes into account the dependence with time of the microscope image. The process is particularly suitable for microphotography of fluorescence pictures with fluorescence which bleaches out (fading). By the display of both the time constant (.tau.) and also the required exposure time, it can be estimated in advance, before exposure of the film, whether the dependence of the fluorescence on time permits microphotography with a sufficient exposure of the film, in the microscope conditions which have been set. A multiple exposure of the film is not required.

Abstract: A photomicroscope includes a port for a still camera (11) and an additional video camera (14). The video image of the video camera (14) serves both for the operation of a passive autofocusing system (23, 24) and for the determination of the exposure time for the still camera (11). The image areas that are used for exposure metering can be selected via a control panel (27). The integration time of the video camera (14) can be varied up to the range of minutes. The selected image areas are superimposed on the object image.

Abstract: A tensioning device is provided with an adjusting element that is adapted to be affixed to the tensioning device after the tension spring therein has been tensioned. The tension can be adjusted to a desired work point after the tensioning element has been mounted on a motor frame or the like.

Abstract: A method for adjusting the tension of a drive belt wherein a tensioning device is pretensioned, e.g., after manufacturing at the plant, with a force corresponding to the force desired for subsequent operation. At this position, calibration markings are formed which can be checked during subsequent adjustments. After being mounted, the drive belt is tensioned until the markings line up.

Abstract: Liquid pump assembly comprising a pump housing having a pump chamber, a drive shaft in the pump chamber mounting a pump rotor, a pump chamber cover and a molded member (12,18) partially defining the shape of the pump chamber (8) located on the inside surface of the pump cover (1).

Abstract: A tensioning device for drive belts includes a pin pivotable about an axis and having an eccentric surface on which a cam is pivotally mounted. A roller adapted to engage a belt is rotatably mounted on the cam. The cam pivots in reaction to forces on a spring acting between the cam and pin. The spring may be preloaded to a specific operating point by rotation of the pin. Markings or projections acting as stops facilitate adjustment of the preloading of the spring.

Abstract: Pulley for driving the shaft of a water pump, especially a pump for the cooling system of an internal combustion engine, the shaft being designed to be integral with a pulley body carrying the rim of the pulley, characterized in that the rim (15, 25, 31, 37) is designed as a sleeve and is attached to the pulley body (13, 22, 29, 39) in a form-locking or friction-locking manner.

Abstract: In a pre-mounted tensioning device the fastening bolt is covered by the idler wheel. The fastening bolt is serviced through a recess provided in the wheel surface. A pre-mounted unit is created through the insertion of a fastening bolt whose head is pushed by spring elements against the wheel surface, thus preventing the idler wheel from turning and forcing the recess to coincide with the fastening bolt.

Abstract: Two springs inserted in series, which press a tension roller against a drive belt, are provided in a tension device for a drive belt. The tension spring essentially effects adjustment of the tension roller during assembly and after that effectively is inoperative. The working spring is active during operation and within a limited range of adjustment of the tension roller. The tensions of the two springs are designed so that during assembly equilibrium of forces exists at a middle working point within the path of adjustment. These features result in a simple and precise adjustment during assembly.

Abstract: In a swivel bearing for a braking device the fixed machine part is provided with a flange which has friction surfaces for damping the swivel motion. A flange sleeve made of sheet metal axially and radially surrounds a flange which adjoins the front side of a sleeve section belonging to the swivel arm. The resulting annular space contains, besides the flange, an axially acting spring washer. The flange sleeve itself may optionally have an axial spring action. The flange sleeve is secured axially and against torsion at the sleeve section by means of a turned edge or similar means. The result is a compact arrangement which does not easily disassemble, even in an unmounted condition.

Abstract: A ring-shaped machine part of relatively hard material with an essentially cylindrical seating surface which has at least one ring-shaped milled section on which a machine part of relatively soft material with a corresponding seating surface can be seated coaxially in a form-locking manner. The milled section is provided on at least one axial end of the hard machine part and extends, starting from the cylindrical seating surface, to the end surface.

Abstract: A tensioning mechanism for drive belts which consists of a support arm, a rotating tensioning roll mounted on the arm, and a pivot bearing on the support arm a certain distance away from the tensioning roll. The tensioning mechanism is attached together with a mounting plate by a fastener to a machine block. A spring urges the tensioning roll away from the mounting plate and toward the drive belt. In the area of the pivot bearing, the mounting plate has, in the axial direction of the bearing, a fork-shaped cross section with shank sections which support the pivot bearing on both sides, radially and axially, by way of the fastener.

Abstract: A tension roller has a rolling bearing supported by a multipart support which is swivable about an eccentrically arranged mounting bolt. A rolling sleeve for a belt is arranged on the outer ring of the bearing. The support includes two side parts which abut the side surfaces of the bearing inner ring, thereby preventing axial movement. A central body is provided with respect to which the side parts are fixedly arranged. The central body is adapted to provide radial support for the bearing inner ring.