Overspeed system redundancy monitor
US4712372A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1985 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Sep 18, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D21/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A redundancy monitor is presented which makes operational checks on the electronic overspeed control system used on aircraft turbine engines. The monitor is a small and lightweight device that can be permanently installed on the engine. Its function is to monitor both the speed pickups that count the revolutions per minute that the turbine shaft is turning and at the same time maintain a check on the performance of the circuitry which processes the data. The monitor includes a latching type BITE indicator which signifies redundant status of the speed pickups and a lamp which lights to indicate any failure in the output circuitry of the overspeed sensor system. A momentary-on type switch activates self test circuitry within the redundancy monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.