Electromagnetically compensated balance or dynamometer

US4004458A · kind A · utility

Assignee

• Sartorius-Werke GmbH (und vorm. Gottinger Prazisionswaagenfabrick GmbH) · DE

Inventors

• Erich Knothe · Bovenden, DE
• Franz-Josef Melcher · Hardegsen, DE
• Christoph Berg · Oettingen, DE

Key dates

• Filing date: Mar 5, 1976
• Grant date: Jan 25, 1977
• Expiry date: Mar 5, 1996

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L1/086
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A balance or dynamometer which comprises a coil in the work gap of an eleomagnet having a core provided with discrete groups of turns, the number of ampere turns in the groups of turns corresponding to the sequence or code values of a preselector code, the coil and electromagnet being disturbed from a predetermined position relative to each other under the influence of a force; such disturbance being recorded by a position indicator connected to the input of a forward/backward counter; means for arranging that the number registered in the counter at any one time connects an associated number of groups of turns to a constant current source connected to the coil; the coil and electromagnet returning to said predetermined position when the counter has connected an appropriate number of groups of turns to the constant current source to compensate for the disturbing force.