Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1974-08-05
1976-06-15
Rolinec, R. V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 71E, 204274, G01N 2742
Patent
active
039639797
ABSTRACT:
A salinometer apparatus for measuring the salinity (conductivity) of a liquid sample from a standard sample bottle or other container having an elongated tube having one end adapted for insertion into a sample bottle or container, a conductivity measuring cell formed of a glass tube having an elongated main body portion, four upwardly extending branch tubes connected to the main tube and having liquid seals at their upper ends, metal electrodes mounted inside the four branch tubes, two of the electrodes forming potential electrodes and the other two forming current electrodes, electrical leads passing through the seals and connected to the four electrodes, said cell being connected at one end to the elongated tube and the other to waste, a temperature controlled liquid bath, temperature changing means associated with said bath, an electric heating and control circuit connected to said heating means, the said conductivity cell and a portion of the elongated tube being immersed in said bath, means for flushing the conductivity cell between sample measurements, air pressure means for connection to the sample holder for positively forcing a portion of the liquid sample out of the sample holder into and through the elongated tube and conductivity cell, and a conductivity, measuring circuit connected to the potential and current electrode leads for measuring the conductivity of the liquid contained in the cell.
REFERENCES:
patent: 2901327 (1959-08-01), Thayer et al.
patent: 3561917 (1971-02-01), Michaels et al.
patent: 3645802 (1972-02-01), Keough
patent: 3701006 (1972-10-01), Volkel
patent: 3781675 (1973-12-01), Augel
Canadian Patents and Development Limited
Hughes James R.
Rolinec R. V.
Tokar Michael J.
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