Summary
A differential transformer has been mounted on a filar micrometer eyepiece and has been coupled to a recording circuit, to make possible automatic recording of the hairline positions. The apparatus greatly reduces the time required to make measurements with a filar eyepiece; e.g., as when measuring the multiple Coulomb scattering of tracks in nuclear emulsions.
Riassunto
Un trasformatore differenziale è stato montato su un oculare cou micrometro a reticolo ed accoppiato a un circuito registratore, onde rendere possibile la registrazione automatica delle posizioni della linea di fede. L’apparecchio riduce notevolmente il tempo richiesto dalle misure con oculare a reticolo; ad esempio nella misura delto scattering coulombiano multiplo di tracce in emulsiont nucleari.
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References
A. G. Ekspong has reported an apparatus which graphically records first differences between successive positions of the hairline in a filar eyepiece, (Ark. f. Fys.,9, 49 (1954)).
ATCOTRAN differential transformer, Class 6208; Automatic Temperature Control Co., Philadelphia, Pennsylvania.
P. H. Fowler:Phil. Mag.,41, 169 (1950).
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Stiller, B., Louckes, P.I. Semi-automatic recorder for filar micrometer eyepiece and its application to track measurement. Nuovo Cim 4, 642–647 (1956). https://doi.org/10.1007/BF02745389
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DOI: https://doi.org/10.1007/BF02745389