Isobaric dilatometer

Details Isobaric dilatometer Isobaric dilatometer

1992-01-03

1992-12-22

Yasich, Daniel M.

Thermal measuring and testing

Thermal testing of a nonthermal quantity

Expansion or contraction characteristics

73 38, G01N 1500, G01N 2516

Patent

active

051729776

ABSTRACT:
An isobaric mercury dilatometer for measurements of volume changes of solid specimens under a constant hydrostatic pressure either as a function of time or as a function of temperature. It includes structures for minimizing entrapment of air in the system, accurate computerized measurements in spite of the presence of some air. A two-piece stainless steel container is equipped with a horizontally situated volume-measuring stem, a filling device, an air vent and a temperature sensor. The specimen to be studied is placed in the container which is subsequently filled with mercury up to the stem. The volume changes of the specimen is reflected to the capacitance signals of an aluminum sleeve around the stem, while the temperature sensor generates temperature-related electronic signals. Both signals are received by a computer which translates them into volume and temperature data.

REFERENCES:
patent: 3085441 (1963-04-01), Sarian
patent: 3106086 (1963-10-01), Hughel
patent: 3242729 (1966-03-01), Keller
patent: 3262313 (1966-07-01), Hanna
patent: 3327524 (1967-06-01), Osgood
patent: 4354219 (1982-10-01), Akita
patent: 4453398 (1984-06-01), Demirel et al.
patent: 4762424 (1988-08-01), Baricevac et al.
patent: 4923307 (1990-05-01), Gilmore et al.

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