Patent · US Active

Switch for a brush wear recording circuit

US7923892B2 · kind B2 · utility

4Cited by

5References

6Claims

0Family size

Assignee

ALSTOM Technology Ltd · CH

Inventors

Bernhard Mark · Waldshut-Tiengen, DE
Max Hobelsberger · Aesch, CH

Key dates

Filing date	Apr 24, 2009
Grant date	Apr 12, 2011
Priority date	—
Expiry date	Oct 23, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH01H3/16
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A switch for a recording circuit used to determine brush wear of an electrical brush comprises a flag having a first end and a second end defining distal ends of the flag. The flag is mounted on the electrical brush at the first end so as to move in unison with brush wear while being in electrical communication with the electrical brush and has a piercing feature on the second end. The switch further comprises a contact plate arrange relative to the flag so as to bring the flag in contact with the contact plate at a predetermined brush wear and includes an inner conductive core encased by a cover forming an outer layer of the contact plate, wherein the piercing feature is configured to penetrate the cover and to contact the conductive core to cause electrically continuous contact between the flag and the contact plate and close the switch.

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