Electric contacts, electric contact apparatus and method for detecting abrasion of the electric contacts
US7049532B2 · kind B2 · utility
23Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2004 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Aug 19, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2001/0031
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pair of electric contacts include a pair of first units which are provided on the surfaces of the end sides of the electric contacts, and generate light having first characteristics at the time of opening and closing of the electric contacts, and a pair of second units which are covered with the first units, and generate light having second characteristics differing from the first characteristics when abrasion of the first units reaches abrasion detection positions due to opening and closing of the electric contacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.