Resistive device sensor
US4260985A · kind A · utility
8Cited by
8References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1980 |
| Grant date | Apr 7, 1981 |
| Priority date | — |
| Expiry date | Feb 11, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A monitoring circuit for electrically conductive resistive devices such as diesel glow plugs in which the devices are fed through an electrically sensitive path, and the voltage across the electrical devices is sensed with respect to a reference. If the sensed voltage is above the reference indicating the presence of a defective device, a warning is indicated. The circuit includes means allowing warm up of the devices before sensing, and for inhibiting signals, which would otherwise indicate a false warning, after a chosen period for sensing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.