Research Article| Volume 36, ISSUE 1, P158-162, July 1950

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A direct-writing pneumotachograph

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      This article describes a direct-writing pneumotachograph which can be applied to recording visible pneumotachograms on a continuous recording electronic unit. The output of the pneumotachograph could also be fed into other types of rapid response ink writers or recorders. The unit makes use of the electromechano transducer, the RCA No. 5734 tube, and gives satisfactory frequency response and linear displacement with air flow as required for pneumotachography. Other applications for biologic work are under investigation.
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