Abstract: A strut for a system for constructing devices for clamping workpieces in defined and reproducible positions is made of an angle section or a U-shaped section or a rectangular section. The strut has grid bores of identical diameter arranged at a regular grid spacing relative to one another. The grid bores are provided on legs of the strut and are accessible from both sides of the legs, respectively. Several struts are combined to a receiving part in that the struts are arranged parallel to one another and connecting elements are used to connect the struts to one another. The connecting elements are inserted into the grid bores.

Abstract: An attaching and coupling element for a system for building devices for clamping workpieces, which system comprises a T-groove section having T-shaped grooves extending longitudinally and vertical bores spaced apart at a grid spacing from one another in the longitudinal direction and extending vertically into the T-shaped grooves, has a holding member provided with sliding blocks on an underside of the holding member and a coupling plate having an underside with a recess for receiving the holding member. At least two of the sliding blocks are spaced at the grid spacing from one another. The holding member has passages spaced at the grid spacing from one another. The coupling plate has centering pins and at least two of the centering pins are spaced at the grid spacing from one another. The centering pins are insertable through the passages of the holding member into the vertical bores.

Abstract: A strut for a system for constructing devices for clamping workpieces in defined and reproducible positions is made of an angle section or a U-shaped section or a rectangular section. The strut has grid bores of identical diameter arranged at a regular grid spacing relative to one another. The grid bores are provided on legs of the strut and are accessible from both sides of the legs, respectively. Several struts are combined to a receiving part in that the struts are arranged parallel to one another and connecting elements are used to connect the struts to one another. The connecting elements are inserted into the grid bores.

Abstract: A sandwich board for erecting workpiece clamping devices has an upper plate forming a clamping surface provided with fastening bores and a lower plate forming a support surface. Support bodies are positioned between the upper plate and the lower plate. The support bodies are pin-shaped and are friction-welded to a first one of the upper and lower plates and glued to a second one of the upper and lower plates.

Abstract: A sandwich board for erecting workpiece clamping devices has an upper plate forming a clamping surface provided with fastening bores and a lower plate forming a support surface. Support bodies are positioned between the upper plate and the lower plate. The support bodies are pin-shaped and are friction-welded to a first one of the upper and lower plates and glued to a second one of the upper and lower plates.

Abstract: A base plate for building devices for clamping workpieces in a defined and reproducible position has first grid points arranged in a uniform grid pattern defined by perpendicularly crossing center lines spaced from one another by a uniform grid pattern spacing. The first grid points describe an ideal surface of the base plate. Each first grid point is a first concave spherical depression having a center point. Each center point is located on a point of interception of the perpendicularly crossing center lines.

Abstract: A system for constructing devices for chucking workpieces in defined and reproducible positions on machine tools and measuring machines includes a mounting pipe which has grid points formed at regular coordinate distances and is provided in the longitudinal direction of the pipe with chamfers uniformly distributed over the circumference, wherein the grid points are formed on the chamfers in the form of concave spherical recesses, and wherein the center points of the spherical recesses are located on lines which extend parallel to the chamfers outside of the pipe body and which describe the ideal pipe shape.

Abstract: A coupling for parallelepiped-shaped or block-shaped mounting components for chucking workpieces in defined and reproducible positions, wherein the mounting components are provided with fitting bores and transverse bores having the same cross-sections and being arranged in regular coordinate intervals. The coupling includes a coupling member having a projection which can be inserted with precise fit into a hollow space provided at the end face of a mounting component to be connected. A plurality of hook elements are arranged in the projection, wherein the hook elements can be pivoted so as to produce a positively locking engagement with the wall surface of an adjacent fitting bore or transverse bore.

Abstract: A diagonal strut for a system for the construction of arrangements used for mounting workpieces on machine tool tables in a defined and reproducible position. The system includes a base plate and receiving members connected to each other by the diagonal strut. The base plate and the receiving members have connecting bores whose axes are arranged spaced from each other at unit spacings. The diagonal strut has transverse connecting bores whose axes are spaced apart at a distance which corresponds to five times the unit spacing or a multiple thereof. Two end faces are arranged at each end of the diagonal strut. The end faces extend at a right angle relative to each other and one of the end faces includes an angle of 36.87.degree. with a centerline extending through the axes of the transverse connecting bores and the other end face includes an angle of 53.13.degree. with the centerline.

Abstract: The magnetic chuck for chucking or raising workpieces has differently poled (S and N) magnetic pole pieces (1), between which is located a pole pitch (2) of non-ferromagnetic material. In order to make the magnetic chuck more universally usable for workpieces made from non-magnetizable or weakly magnetizable material, it is additionally constructed as a vacuum chuck. This is brought about by correspondingly differently designed bores or slots, which are preferably filled with sintered metal and by means of which the vacuum is applied through corresponding vacuum lines. Due to the fact that the magnetic force and/or the force applied by the vacuum is available as a retaining or holding force, a universal use of the same tool is possible and simultaneously a considerable holding force can be applied.

Abstract: A system for the assembly of devices for fixing workpieces to machine tool tables, including a base plate, which can be fixed to the machine tool table, or the like. Fitting holes are formed in the base plate with regular coordinate spacings. In the base plate, in a plane at right angles to the fitting holes, are formed preferably intersecting cross holes, whose diameter corresponds to that of the fitting holes. Nuts for the fitting screws are inserted both in the cross holes and the fitting holes, in order to fix mounting parts to the base plate. The cross-section of each nut corresponds to that of each cross and fitting hole. The mounting parts are preferably provided with cross and fitting holes similar in arrangement to the base plate.

Abstract: An apparatus for clamping workpieces made from varied materials and complicated shapes comprises a body and clamping member, which are formed by adhesive films which can be used a number of times. These adhesive films can be moved from a position above the clamping surface of the body into a position below the clamping surface. In the first position, the workpiece is e.g. reliably fixed by pressing down. The adhesive film is then lowered into the plane of the clamping surface, so that the workpiece rests thereon and is reliably and firmly supported there for machining purposes. The adhesive film simultaneously secures the workpiece in the machining position. When machining is ended, the adhesive film is lowered beneath the plane of the clamping surface, so that the adhesive connection can be broken and the workpiece removed. The adhesive film can be moved mechanically, e.g. by an eccentric drive, or alternatively by a hydraulic or pneumatic mechanism.

Abstract: The present invention pertains to a continuously variable gear device for converting a rotary motion into a linear motion which is dependent on the angle of rotation. The gear device comprises a swivel arm which is rotatable about a fulcrum and is attached to a guide structure on the input and output sides, respectively, of the gear device. Each guide structure is provided with a sliding member to which strings are attached. The swivel arm has guide slots formed on either side of the fulcrum and each guide structure has a roller bearing which engages one of the slots. The mutual distance between the two guide structures is adjustable, by moving one of the guide structures along a positioning rail to vary the transmission ratio of the device.

Abstract: A yieldable roof support structure for mine passages and the like includes inner and outer hollow segments attached end-to-end to form a closed or an opened support frame, the segments including separating walls defining chambers associated with the joined together ends so that, upon application of pressure to the chambers, the joined segments are moved apart to facilitate a disassembly of the frame.Alternatively, piston and cylinder units may span the joined ends of the segments for separating them upon the application of external pressure.

Abstract: Disclosed is an improved transport mechanism for cyclically conveying an original past an optical scanning device in an electrophotographic copying machine of the type in which a gripping unit engages a leading edge of an original during the entire cycling time, which reduces distortion, maximizes utilization of the transport mechanism, and enables the use of lower illumination intensities by optically scanning the original as a planar surface and by providing a pair of transport rollers downstream of the optical scanning device to insure a fast cycling and delivery of the original.

Abstract: An apparatus for developing diazo material according to a semi-dry process comprising an applicator roll with a liquid absorbing cover, a press roll having a grooved hard surface, a backing roll biased against the press roll, and a blade for reducing the amount of developer liquid on the applicator roll and the press roll. The press roll is displaceable toward the applicator roll. The plane of transport of the diazo material to be developed passes between the applicator roll and the press roll. The axial moment of inertia of the press roll relative to the axial moment of inertia of the applicator means is determined in accordance by an equation containing weight components of the press roll, weight components of the applicator roll, the contact pressure component of the backing roll, and the sum of the components of the tangential force and normal force of the contact pressure of the blade and the frictional force along the line of contact of the blade on the applicator roll.

Abstract: Disclosed is a sheet conveying mechanism for an original to be reproduced in a reproducing apparatus, comprising means, including a rotatable drum having an air-permeable circumferential shell surface, for supporting the original; non-rotatable means disposed within the drum for dividing the space within the drum and the circumferential shell surface of the drum into three separate regions; means associated with the drum for selectively producing positive and negative pressure within each of the separate drum regions; means for exposing and scanning the original, positioned adjacent a first one of said separate drum regions; means, associated with the drum and being responsive to movement of the original around the drum, for controlling the pressure-producing means; and first and second means, cooperating with the drum and located adjacent the circumferential shell surface of the drum in the area of a second one of the separate drum regions, for transporting the original around the drum.