Method and arrangement for the automatic observation of interfac

Details Method and arrangement for the automatic observation of interfac Method and arrangement for the automatic observation of interfac

1977-05-04

1979-04-10

Gruber, Felix D.

Boots, shoes, and leggings

73 19, G01N 2512, G01F 1100

Patent

active

041492552

ABSTRACT:
Interfacial phenomena are observed employing an electronically compensated vacuum micro-balance for weighing the specimen mixture under observation. The gas pressure in the vacuum micro-balance is determined by means of a buoyancy element. During the weighing operation the weights of the specimen and of the buoyancy element and also the temperature of the specimen are determined at intervals of 0.1 to 60 seconds. The measured values thus obtained are supplied to converters whereby they are converted into initial values which are computer-readable. The measured values thus converted are stored intermediately in a computer, successive values being compared with one another until 2 to 50 successive values of the weight of the specimen differ from one another by less than 50.gamma. 1 .gamma. means 10.sup.-6 g. The result of this latter specimen weight comparison, together with the values of the gas pressure and of the temperature, is printed out by a printer connected to the computer. Thereafter the above-mentioned observations are repeated, in accordance with a program stored in the said computer for the control and monitoring of the observations in conformity with predetermined instructions and conditions.

REFERENCES:
patent: 3740320 (1973-06-01), Arthur
patent: 3949590 (1976-04-01), Boillot
patent: 3964864 (1976-06-01), Dahms
Smith: Use of Thermodesorption Technique for Studying Gas Adsorption, Journal of Colloid and Interface Science, vol. 34, No. 3, pp. 401-405 Nov. 1970.

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