Abstract
THE frequency of an oscillator is usually set by dial adjustments corresponding to a calibration chart from which the exact frequency corresponding to the dial indications may be obtained. The relationships between the frequency and dial markings, moreover, are different for every oscillator, so that a calibration chart must be prepared for each. This is not particularly difficult but is laborious, by reason of the need to refer for every reading to a calibration chart. It is much simpler to employ a dial marked directly in frequencies, but to provide such a scale by usual methods requires much time and labour when the frequency range is large and the accuracy is to be high. Although the scales for different oscillators are similar, they are not sufficiently alike to permit the scales for all oscillators to be printed from a single master film.
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AUTOMATIC PRODUCTION OF OSCILLATOR SCALES. Nature 150, 438 (1942). https://doi.org/10.1038/150438a0
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DOI: https://doi.org/10.1038/150438a0