Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1980-04-15
1982-06-08
Swisher, S. Clement
Measuring and testing
Sampler, sample handling, etc.
Capture device
7386434, 137 99, 422 63, 422 81, G01N 3508
Patent
active
043333567
ABSTRACT:
A mixing apparatus utilizes piston burettes driven by stepping motors as metering pumps to deliver component liquids to be mixed into a liquid stream in a selectable constant mixing ratio. A computer-based automatic control system is used to control the regulated take up of the respective components by the burettes and the delivery of them to a mixing device. The computer calculates the rates of stepping of the respective motors so that each component is delivered over the same period of time and at a respective uniform rate. The computer also controls associated switching valves via an interface device and may be a desk top machine with keyboard or pre-programmed data input.
REFERENCES:
patent: 3398689 (1968-08-01), Allington
patent: 3570314 (1971-03-01), Wagner
patent: 3620134 (1971-11-01), Conlon et al.
patent: 3666420 (1972-05-01), Paatzsch
patent: 3831618 (1974-08-01), Liston
patent: 4096972 (1978-06-01), Bartels et al.
patent: 4275822 (1981-06-01), Juffa
Krottinger et al., "High Speed, Automatic dispenser/diluter, etc.", Journal of Automatic Chemistry, vol. 1, No. 1, pp. 15-21, Oct. 1978.
Mieling et al., "Fully Automated Stopped-Flow Studies with a Hierarchical Computer Controlled System", Analytical Chem., pp. 1686-1693, vol. 48, No. 12, Oct. 1976.
Bartels Hermann
Huber Walter
Mez Hans-Christian
Stolz Hans-Peter
Ciba-Geigy Corporation
Falber Harry
Swisher S. Clement
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