DEVICE FOR TWO-DIMENSIONAL ANALYSIS OF WEISSENBERG PHOTOGRAMS BY MEANS OF WEISSENBERG LATTICES

摘要

1331191 Plotting Weissenberg photograms FREIBERGER PR€ZISIONSMECHANIK VEB 4 Jan 1971 293/71 Heading G1M The apparatus is for two dimensional analysis of X ray reflections in Weissenberg photograms by means of Weissenberg lattices in the examination of crystals. An illuminated stationery frame 1 carries an adjustable transparent plate 2 on which a Weissenberg lattice 3 is traced in blue colour. A frame 4 slidable on guide rails 10 carries a frame 6 hinged at 5 and supporting an adjustable plate 8 having a Weissenberg lattice 9 thereon in red colour. The frame 1 carries a hinged clip 15 to support an analysed Weissenberg photogram (not shown) which may be sandwiched between the lattice 3 and the movable lattice 9 so that the centre lines 11, 12 coincide when the frame 6 is hinged downwardly. In this sandwich position and by appropriate sliding movement of the frame 4 the systems of curves of the lattices 3 and 9 intersect, the frame 4 and 6 are then fixed by screw 14 and catches 16 so that the plotting of the photogram can begin.