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A pressure-operated safety circuit for use in high-vacuum serum-drying plants

Published online by Cambridge University Press:  15 May 2009

F. B. Byrom
F. B. Byrom
Affiliation:
From the Post-Graduate Pathology Unit, the University of Sydney
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A form of Pirani vacuum gauge is described for obtaining a continuous record of the total residual pressure in a high-vacuum serum-drying cylinder of the Greaves-Adair type. The circuit incorporates an automatic relay which breaks the electric current heating the frozen serum if the pressure rises to a dangerous level, and so delays materially the onset of fusion of the serum.

Type
Research Article
Information
Journal of Hygiene , Volume 43 , Issue 5 , April 1944 , pp. 349 - 351
Copyright
Copyright © Cambridge University Press 1944

References

REFERENCES

Greaves, R. I. N. & Adair, M. E. (1939). J. Hyg., Camb., 39, 413.Google Scholar
Kaye, G. W. C. (1927). High Vacua, p. 144. London: Longmans, Green and Co.Google Scholar