Low pressure dew and frost point indicator

Details Low pressure dew and frost point indicator Low pressure dew and frost point indicator

1977-12-16

1979-12-25

Goldstein, Herbert

Measuring and testing

Gas content of a liquid or a solid

By vibration

G01N 2568

Patent

active

041799178

ABSTRACT:
A low pressure dew and frost point indicator of the type having a vortex tube which directs a cold air stream against the back of a viewing mirror for observation of the initial formation of frost. The mirror has means for simple and automatic centering with respect to the cold air stream of the vortex tube for maximum temperature transfer. The mirror engages no heat conducting elements and has means for improved cold temperature transfer. A venturi nozzle passes the warm air output of the vortex tube around the cold air output for adjustment to provide optimum cold air generation by reduction of the vortex tube outlet pressure. A temperature control valve controls the temperature in the sample chamber by mixing the warm and cold air outputs of the vortex tube.

REFERENCES:
patent: 2624195 (1953-01-01), Van Alen
patent: 2680371 (1954-06-01), Donath
patent: 2769339 (1956-11-01), Brailsford
patent: 3152475 (1964-10-01), Ford et al.
patent: 3281814 (1966-10-01), Roth
patent: 3460373 (1969-08-01), Ford
patent: 3874220 (1975-04-01), Sheldon
patent: 3886784 (1975-06-01), Sheldon
"The Lectrodryer Dew point Apparatus" in McGraw-Edison Bulletin LAB-A1 SM271.
General Eastern Corporation, 1200 Series Dew Point Hygrometer Specifications.
E.G.G. Model 444, Dew Point Hygrometer Bulletin, 3-140.

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