Dynamic contact checking circuit
US4376277A · kind A · utility
5Cited by
14References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1980 |
| Grant date | Mar 8, 1983 |
| Priority date | — |
| Expiry date | Oct 17, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/802
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A fail safe type of monitoring circuit for contacts is provided using an opto-isolator. The opto-isolator is energized in response to the operation of the contacts to clearly indicate whether the contacts are open or closed, and whether the circuit components are functioning in a valid manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.