Patent · US Expired

Balance based on the principle of the electromagnetic compensation of force with optical position sensor

US4825968A · kind A · utility

12Cited by

6References

14Claims

0Family size

Assignee

Sartorius AG · DE

Inventors

Gunther Maaz · Uslar, DE
Udo Wedeken · Göttingen, DE
Eduard Bierich · Hann. Münden, DE
Eberhard Stadler · Göttingen, DE

Key dates

Filing date	Dec 22, 1987
Grant date	May 2, 1989
Priority date	—
Expiry date	Dec 22, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S177/06
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

There is disclosed a balance based on the principle of the electromagnetic compensation of force with a cylindrical permanent magnet system, with a magnet cover and with a coil for generating the counteracting force that an emitter and a receiver of the optical position sensor be housed inside the magnet cover. The slit diaphragm of the optical position sensor, which extends from below into the area between emitter and receiver, then forms a compact unit with a carrier, e.g., the end of a translation lever, and with a coil and mutual shifts at temperature changes and temperature gradients occur only to a minimal extent.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.