Method of determining the relative air content in an air-contain

Details Method of determining the relative air content in an air-contain Method of determining the relative air content in an air-contain

1975-03-27

1976-07-13

Gill, James J.

Measuring and testing

Gas content of a liquid or a solid

By vibration

G01N 700

Patent

active

039686787

ABSTRACT:
A method and an apparatus for determining the relative air or gas content in a product flowing through a conduit. By means of two substantially synchronized pistons moving in opposed cylinders, a sample of the product is transferred from the conduit to a sampling chamber defined in one of the cylinders between the pistons. After the sample has been isolated from the material flowing through the conduit, the pistons are moved towards one another whereby the volume of the sampling chamber is reduced to a predetermined value. The compression of the sample results in an increased pressure, and when the pressure has reached a predetermined value, an overflow valve is opened to let excess material flow from the sampling chamber back to the conduit. When the movement of the pistons towards one another has stopped and said predetermined pressure has been established in the sample, a predetermined expansion of the sample is effected by moving the pistons a predetermined distance from one another. The pressure in the sampling chamber after the expansion has been effected, is then representative of the relative air content in the sample.

REFERENCES:
patent: 2138141 (1938-11-01), Cromer et al.
patent: 2141977 (1938-12-01), Gray
patent: 2736190 (1956-02-01), Bockelman et al.

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