Patent · US Expired

Limit switching apparatus with defined overtravel for specimen protection on microscopes with motorized focusing drive

US5315080A · kind A · utility

6Cited by

4References

8Claims

0Family size

Assignee

Leica Mikroskopie und Systeme GmbH · DE

Inventors

Ulrich Kaczynski · Bad Nauheim, DE
Roland Hedrich · Ehringshausen, DE

Key dates

Filing date	Apr 3, 1992
Grant date	May 24, 1994
Priority date	—
Expiry date	Apr 3, 2012

Classification

Technology area (CPC G)Physics
CPC primaryG02B21/241
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A limit switching apparatus with defined overtravel for specimen-objective protection on microscopes having a motorized focusing drive. A stored focus position or position of the specimen stage can be overtraveled by a fixed amount. The maximum travel path of the specimen stage is additionally limited by a switching rod and a short-circuiting switch, in order to ensure reliable specimen-objective protection even in the event of a fault in the control electronics.

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