Precision Recording Instrument for Measuring Film Width
The paper discusses a mechanical electronic device which continuously measures the width of film to an accuracy of 0.002 mm. The basic circuit is quartz oscillator having a L.C. circuit which is slightly detuned from the resonant frequency. The percentage detuning gives a measure of the film width. Curve shows that for a film variation of 0.250 mm the relationship between film width and measurable current is linear. An inexpensive 0–1 milliammeter can be used without sacrificing accuracy.
- Print ISSN
- 0097-5834
- Published
- 1943-11
- Content type
- Original Research
- DOI
- 10.5594/J09793
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