Device for performing a weight measurement in centrifuges

Details Device for performing a weight measurement in centrifuges Device for performing a weight measurement in centrifuges

1994-04-28

1997-09-09

Noland, Thomas P.

Measuring and testing

Mass

73 113, 494 10, G01G 900, G01G 2301

Patent

active

056659253

ABSTRACT:
A device for performing a weight measurement in centrifuges which serve to process chemical substances of different weights and in which fluctuating gas pressures cause different interfering forces which have an interfering effect on the weight measurement. The centrifuge is mounted so as to swivel in a vertical plane, a force measuring element senses the weight-dependent swivel movements of the machine, and a compensation means equalizes the interfering forces caused by the fluctuating gas pressures such that the weight measurement remains unaffected hereby. The compensation means comprises a sensor sensing the gas pressure in the centrifuge, this sensor correspondingly correcting a weight display as a function of changes sensed in the gas pressure.

REFERENCES:
patent: 1495933 (1924-05-01), Swoncera
patent: 4269711 (1981-05-01), Gerteis
patent: 4660663 (1987-04-01), Amacher et al.
patent: 4708011 (1987-11-01), Rautakoipi et al.
patent: 4808308 (1989-02-01), Flory
patent: 5092995 (1992-03-01), Gerteis
patent: 5421997 (1995-06-01), Gerteis
patent: 5472602 (1995-12-01), Feller et al.

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