Abstract: A digital microscope includes a stage for holding a sample, a monochrome digital camera, an optical system, an illumination assembly for illuminating the sample, and a control unit for controlling the monochrome digital camera and the illumination assembly. The optical system is arranged between the stage and the monochrome digital camera. The illumination assembly is configured to provide illumination with three different wavelength ranges. The control unit is configured to control the illumination assembly to sequentially provide illumination with the three wavelength ranges. The control unit is configured to control the monochrome digital camera to take separate images during illumination with the three wavelength ranges.

Abstract: A method for optically evaluating an operating accuracy of a digital microscope includes: placing a photo mask on a movable table of the digital microscope, the photo mask including an orthogonal grid of line structures, wherein the orthogonal grid of line structures forms a two-dimensional array of photo mask subfields and wherein at least a subset of the two-dimensional array of photo mask subfields and wherein at least a subfield identifiers; taking a digital image of a portion of the photo mask with a digital camera of the digital microscope; determining a relative position of the orthogonal grid of line structures in the digital image of the portion of the photo mask; analyzing at least one unique subfield identifier in the digital image of the portion of the photo mask; and on the basis of said relative position of the orthogonal grid of line structures and said at least one unique subfield identifier, analyzed in the digital image of the portion of the photo mask, determining an absolute position withi

Abstract: A method of providing an assembled image using a digital microscope (2), the digital microscope (2) including an optical system (21) having an objective revolver (24) equipped with a plurality of microscope objectives (25, 26, 27, 29), an image sensor (120), and a stage (10) for holding a sample (12), the stage (10) being movable in relation to the optical system (21) and the image sensor (120), is provided.

Abstract: A digital microscope includes: a stage for holding a sample; a monochrome digital camera; an optical system, arranged between the stage and the monochrome digital camera; an illumination assembly for illuminating the sample; and a control unit for controlling the monochrome digital camera and the illumination assembly; wherein the illumination assembly is configured to provide illumination with three different wavelength ranges, and wherein the control unit is configured to control the illumination assembly to sequentially provide illumination with the three wavelength ranges and wherein the control unit is configured to control the monochrome digital camera to take separate images during illumination with the three wavelength ranges.

Abstract: A membrane valve for fluid media, comprising a valve body, a membrane, a pressure piece, and a drive) for the pressure piece. The membrane is coupled to the pressure piece by a connecting element, having a wall which projects from the membrane in the direction of the pressure piece. A latching hook laterally protrudes from one side and a free space is provided on the other side such that the wall. The latch hook can be deflected in order to connect the latching hook to a corresponding receiving portion on the pressure piece. A stationary pin engages into the free space when the membrane is raised from the valve seat of the valve body and protrudes out of the free space when the membrane is resting on the valve seat.

Abstract: The invention relates to a membrane valve (10), in particular for fluid media, comprising a valve body (20), a membrane (22), a pressure piece (44), and a drive (14) for the pressure piece (44). The membrane (22) is coupled to the pressure piece (44) by means of a connecting element (24), said connecting element (24) having a wall (56) which projects from the membrane (22) in the direction of the pressure piece (44) and on which a laterally protruding latching hook (58) is provided on one side and a free space (50) is provided on the other side such that the wall (56) can be deflected in order to connect the latching hook (58) to a corresponding receiving portion (63) on the pressure piece (44). A stationary pin (74) is provided which engages into the free space (50) when the membrane (22) is raised from the valve seat (32) of the valve body (20) and which protrudes out of the free space (50) when the membrane (22) is resting on the valve seat (32).

Abstract: An apparatus for producing adhesive tape for sheathing of extended products, having two tape plies, having a carrier material with an adhesive coating. The carrier material being unwound from a feeding roll, the one tape ply with its adhesive coating being laminated against the other tape ply with a lateral projection (Ü1, Ü2) on at least one side. The carrier material is unwound from a feeding roll, which is configured as a wide roll, on which the carrier material has a greater width than its width required for laminating, and the carrier material is cut into two strips extending in along the tape which have the width required for laminating, the strips being separated and laminated such that each strip forms a tape ply in at least one adhesive tap.

Abstract: A diaphragm valve includes a valve body and a compressor which is actuatable by a valve stem for operating a diaphragm and has an outer circumference which is formed with at least one axial groove. The compressor is guided by an intermediate piece in axial direction and restrained by the intermediate piece against rotation. The intermediate piece has an inside wall which is formed with at least one axial guide nose for engagement in the groove of the compressor.

Abstract: A diaphragm for a diaphragm valve in particular for liquid fluids includes a backing membrane and a primary membrane which are supported by a central connection pin. Disposed axially between the backing membrane and the primary membrane is a reinforcing element.

Abstract: A compressor for operating a diaphragm of polymer material for a diaphragm valve includes a base body having a diaphragm-proximal surface, and a material layer at least partially provided on the diaphragm-proximal surface and having a very low coefficient of friction.

Abstract: A diaphragm valve includes a valve body defining a passageway constructed to form a valve seat, and a diaphragm. A compressor moves the diaphragm between a closing position in which a flow of fluid through the passageway is barred as the diaphragm is caused by the compressor to seal the valve seat, and an open position in which at least part of a cross section of the passageway is bounded by the diaphragm to thereby enable a flow of fluid through the passageway substantially without narrowing the cross section of the passageway.

Abstract: A flowmeter for measuring a flow velocity of a fluid in a pipeline includes a measuring tube having opposite ends. Two ultrasonic transducers are disposed respectively at the opposing ends of the measuring tube, and two connection pipes are provided for attachment of the flowmeter to the pipeline and extend in axial relationship to the pipeline.

Abstract: A driving apparatus for a linear movement of elongated bodies is provided with a holding device for holding the elongated body on its circumference during a rest state and/or during a motion state, and a moving device for initiating a movement of the elongated body in a direction of its longitudinal axis, with the holding device and the moving device each having piezoelectric elements.

Abstract: A valve body for a valve assembly includes a main passageway in which a primary valve is received which has a weir constructed to define a valve seat and to interact with a valve element in the form of a diaphragm. Integrated in the valve body is a secondary valve having a weir which defines a valve seat and interacts with a second valve element in the form of a diaphragm. The secondary valve is constructed to allow establishment of a fluid communication upstream of the valve seat of the primary valve between the main passageway and a branch line, via which a medium sample can be extracted and/or steam and/or condensate can be, optionally, released.

Abstract: A flowmeter for measuring a flow velocity of a fluid in a pipeline includes a measuring tube having opposite ends. Two ultrasonic transducers are disposed respectively at the opposing ends of the measuring tube, and two connection pipes are provided for attachment of the flowmeter to the pipeline and extend in axial relationship to the pipeline.

Abstract: A valve housing includes a housing body having the shape of a hollow sphere to define an interior for accommodation of at least one valve seat. The housing body is made of at least two shells.

Abstract: A diaphragm valve includes a valve body defining a passageway constructed to form a valve seat, and a diaphragm. A compressor moves the diaphragm between a closing position in which a flow of fluid through the passageway is barred as the diaphragm is caused by the compressor to seal the valve seat, and an open position in which at least part of a cross section of the passageway is bounded by the diaphragm to thereby enable a flow of fluid through the passageway substantially without narrowing the cross section of the passageway.

Abstract: A diaphragm valve includes a valve body and a compressor which is actuatable by a valve stem for operating a diaphragm and has an outer circumference which is formed with at least one axial groove. The compressor is guided by an intermediate piece in axial direction and restrained by the intermediate piece against rotation. The intermediate piece has an inside wall which is formed with at least one axial guide nose for engagement in the groove of the compressor.

Abstract: A diaphragm for a diaphragm valve in particular for liquid fluids includes a backing membrane and a primary membrane which are supported by a central connection pin. Disposed axially between the backing membrane and the primary membrane is a reinforcing element.

Abstract: A flowmeter includes a floating body which floats freely in a stream in a measuring tube, and is acted upon by a flowing force, buoyancy and a weight. In order to generate a counterforce, a measuring spring is fixedly connected to the floating body. The floating body is preferably self-stabilized through a selection of corresponding geometrical relationships. The measuring spring can optionally be rotatably supported on the floating body and/or the measuring tube. The floating body is suitably made of light weight plastic material, so that the density (mass/volume) of the floating body matches the density of the flowing medium.