klydonographn.
/klʌɪˈdəʊnə(ʊ)ɡrɑːf//klʌɪˈdəʊnə(ʊ)ɡraf/ Electrical Engineering.
An instrument for making a photographic record from which the voltage and polarity of a surge can be inferred, consisting of a point electrode resting (in darkness) on a stationary or moving film behind which is a plate electrode.
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the world > matter > physics > electromagnetic radiation > electricity > voltage > [noun] > pulse, surge > instrument recording
klydonograph1924
1924 J. F. Peters in Electr. World 19 Apr. 769 (heading) The Klydonograph. An instrument for accurately measuring and recording voltage surges.
1924 J. F. Peters in Electr. World 19 Apr. 769/1 The word ‘klydonograph’ was coined by Dr. Roscoe M. Ihrig of the Carnegie Institute of Technology.
1940 Nature 22 June 982/1 Three klydonographs were coupled to the line by means of concentric-cylinder type capacitance ‘potential-dividers’.
1963 D. J. Malan Physics of Lightning xi. 92 Since the Klydonograph indicates voltage, it is necessary to know the surge impedance of the system of conductors in order to calculate the peak current.
This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2018).
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n.1924