Title: Electromagnetically compensating weighing or force-measuring device

Abstract: An electromagnetically compensating force-measuring or weighing device includes a working coil disposed in the air gap of a fixed magnetic circuit which includes a permanent magnet. The working coil is subject to the influence of the load to be measured. An indicator responsive to the position of the working coil, has its output fed to a control amplifier, the working coil being fed the output signal from the control amplifier whereby it is brought to the zero position. An additional coil is connected electrically in series with the working coil, the magnetic field produced by the additional coil being determined by a measurement sensor. The output signal of the measurement sensor is a measure of the load to be measured.

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Other info:

Inventors: Knothe, Erich (Bovenden, DE, US)
Berg, Christoph (Gottingen, DE, US)

Application Number: 860087
Filing Date: 1977-12-13
Publication_date: 1979-04-24
Assignee: Sartorius Werke GmbH (Gottingen, DE)
Primary Class(es): 177/212
Other Classes:
US Patent Ref:

3092197	Jun, 1963	Ecker	177/212.
3688854	Sep, 1972	Strobel	177/212.
3786678	Jan, 1974	Kunz	177/212.
3968850	Jul, 1976	Gaskill	177/212.
4034819	Jul, 1977	Akers et al.	177/212.
4062417	Dec, 1977	Kunz	177/212.

Other Refs:
Primary Examiner: Miller, Jr., George H.
Assistant Examiner:
Attorney: Browdy and Neimark