Remote monitoring apparatus
US4675896A · kind A · utility
4Cited by
7References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1985 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Sep 6, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/26
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A determination of the extent and location of malfunctions in electrical equipment is made by providing monitoring apparatus at the equipment which includes a resistance network that provides a different resistance each time a switch changes state and an output corresponding to that change that can be monitored from a remote location. The remote monitor disclosed is a programmed computer with a modem coupled to the monitoring apparatus by phone lines and also coupled to an output device by phone lines whereby the computer can readily transmit malfunction information to the output device at various maintenance center locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.