Device for measuring the modification time of the physical state

Details Device for measuring the modification time of the physical state Device for measuring the modification time of the physical state

1988-12-30

1990-04-24

Williams, Hezron E.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Vapor pressure

73 57, G01N 1110

Patent

active

049189840

ABSTRACT:
The invention relates to a method and device for determining the time of modification of the physical state of a fluid medium of the kind in which a ferromagnetic ball is placed in the bottom of a cup containing the fluid to be studied and driven with a periodic movement under the effect of an external magnetic field and in which the modifications of the movements of this ball, due to the modification, are detected. The method is characterized by the fact that the ball always follows at each period the same imposed path and in that the amplitude variations and/or the frequency of its movement are detected.

REFERENCES:
patent: 2957338 (1960-10-01), Kennedy et al.
patent: 3073150 (1963-01-01), Fann
patent: 3967934 (1976-07-01), Seitz et al.
patent: 4081242 (1978-03-01), Girolami
patent: 4728500 (1988-03-01), Higo

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