Patent · US Expired

Device for detecting the condition of carbon brushes

US4761594A · kind A · utility

33Cited by

3References

6Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Anton Rodi · Leimen, DE
Berthod Grutzmacher · Dossenheim, DE
Michael Kruger · Aachen, DE

Key dates

Filing date	Mar 17, 1986
Grant date	Aug 2, 1988
Priority date	—
Expiry date	Mar 17, 2006

Classification

Technology area (CPC H)Electricity
CPC primaryH01R39/58
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An optical device for detecting a condition of a carbon brush in a drive unit includes lightguides disposed in vicinity with the carbon brush yet out of contact with the carbon brush and having a device for monitoring wear of the carbon brush, and a device for triggering a warning signal when the carbon brush has reached a predetermined residual length.

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