Device with continuous variable scale, applicable to photocolorimeters and spectometers, that allow direct reading in concentrations. (Machine-translation by Google Translate, not legally binding)

摘要

"DEVICE WITH CONTINUOUS VARIABLE SCALE, APPLICABLE TO PHOTOCOLORIMETERS AND SPECTROMETERS, THAT ALLOWS DIRECT READING IN CONCENTRATIONS", characterized by the fact that it consists of a luminous source, whose beam of light is reflected by the mirror of a suspension galvanometer equipped with the corresponding adjusting command, having provided, in the device, a peephole to be able to carry out the direct reading, which appears on a graph or continuous variable scale that slides in front of said peephole, driven by a transmission system constituted by controlled rollers, in its advance or retraction, by a drag control of said graph or scale, proceeding, firstly, to adjust, by means of the blank test, the zero of the optical density of the apparatus, for which purpose the standard tube is introduced and to move the scale in one or the other direction, until the position reflected by the galvanometer coincides with the concentration of the standard, Then, place the problem carrier tube in the device, which will give a new position of the galvanometer reflected in the scale allowing its reading, which will directly give the concentration of the problem. (Machine-translation by Google Translate, not legally binding)