Electronic balance having parallel rod guides and having a scale on top

US4653600A · kind A · utility

Assignee

• Sartorius AG · DE

Inventors

• Franz-Josef Melcher · Hardegsen, DE
• Gunther Maaz · Uslar, DE
• Eduard Bierich · Hann. Münden, DE
• Eberhard Stadler · Göttingen, DE
• Christoph Berg · Oettingen, DE

Key dates

• Filing date: Feb 11, 1986
• Grant date: Mar 31, 1987
• Expiry date: Feb 11, 2006

Classification

• Technology area (CPC G): Physics
• CPC primary: G01G21/24
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a parallel rod guide for electronic balances having a measured value sensor, typically corner load adjustments are made by adjusting the parallelism of the two rods and such adjustments are normally sufficient. However, this can eliminate only linearly load-dependent corner load errors. In order to eliminate corner load errors which are non-linearly dependent on the load, the present invention provides an adjustment assembly which varies the resilience of the fastening points on the system carrier side of at least one rod to horizontal forces. The adjustment assembly may comprise, a screw/nut connection whose position can be varied vertically therewith, varying the effective length of a resilient intermediate part.