Flow-through capillary viscometer

Details Flow-through capillary viscometer Flow-through capillary viscometer

1975-07-11

1976-09-21

Queisser, Richard C.

Measuring and testing

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

Viscosity

G01N 1106

Patent

active

039811824

ABSTRACT:
A capillary viscometer for measurement of viscosity of liquids conprising, in addition to the usual capillary tube and measuring bulb, a filling tube leading to an inlet bulb with a tube opening between the capillary tube and the measuring bulb. The inlet bulb is connected by an overflow tube with an outlet tube of the viscometer situated below the measuring capillary tube. The inlet bulb is also connected by a subsidiary capillary tube with the overflow tube. When determining the viscosity, the liquid is poured into the filling tube, flows through it into the inlet bulb; the excessive liquid flows out through the overflow tube. At the same time the measuring bulb is filled from the bottom by the liquid flowing from the inlet bulb. The first portion of this liquid washes the measuring bulb from the preceding sample, and the contaminated portion of the liquid flows out through the overflow tube. Simultaneously a small quantity of the liquid flows through and washes the measuring capillary tube. The pure portion of the liquid then flows freely through the measuring capillary tube and the corresponding time of flow is determined. All operations, i.e., the filling of the viscometer, the filling of the measuring bulb, the flow of liquid through the capillary tube, and washing of the viscometer for the next measurement are performed in one single step. The viscometer may be equipped with a reservoir for tempering of the liquid positioned above the filling tube or with a siphon positioned above the filling tube.

REFERENCES:
patent: 2048305 (1936-07-01), Ubbelohde
patent: 2095282 (1937-10-01), Payne
patent: 2095324 (1937-10-01), FitzSimons
patent: 2343061 (1944-02-01), Irany
patent: 3559463 (1971-02-01), Tovrog et al.
patent: 3864962 (1975-02-01), Stark et al.

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