Measuring and testing – Gas content of a liquid or a solid – By vibration
Patent
1977-07-18
1979-08-14
Goldstein, Herbert
Measuring and testing
Gas content of a liquid or a solid
By vibration
G01N 2504
Patent
active
041641361
ABSTRACT:
The state of mobility of a substance--e.g., the pour point of a liquid, is determined by disposing in or in contact with the substance a shear device at the bottom end of a substantially vertical elongate probe mounted for rotation about its vertical rotational axis. The probe is urged to a datum position by suitable means (e.g. a pair of magnets) and, intermittently, a rotational force is momentarily applied to the probe at its top end to cause rotation about the probe axis away from the datum position. If the probe rotates, because the mobility of the substance so permits, a member attached to the probe interupts a light path between a light source and a light sensor, giving rise to a signal indicative of the mobility of the substance. When there is no, or slow, rotation, the non-interruption of the light path over a selected time interval indicates a reduced mobility of the substance. The probe preferably has a temperature sensor at the bottom end for correlating mobility and temperature, and is preferably formed from a freely suspended upper part and a detachable/replaceable lower part. The two parts are mechanically and electrically connectable by a plug and socket type of connector.
REFERENCES:
patent: 2423687 (1947-07-01), Davis et al.
patent: 3229506 (1966-01-01), Bross et al.
patent: 3285057 (1966-11-01), Zurik
patent: 3590627 (1971-07-01), Campbell et al.
patent: 4045999 (1977-09-01), Palmer
Campbell et al., "The Automatic Determination of Pour Point", in Journ. of the Inst. of Petroleum, vol. 56, #551, 9/70, pp. 243-253.
Wiggins Brian H.
Williams Harold D.
Exxon Research & Engineering Co.
Goldstein Herbert
Paris F. Donald
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