Turbine engine blade pyrometer
Abstract
Abstract IN A JET TURBINE ENGINE AN OPTICAL PASSAGE EXTENDS THROUGH THE STATOR BLADE FIRST RADIALLY FROM THE OUTER TURBINE WALL, THENCE LATERALLY TOWARD THE ADJACENT PATH OF THE MOVING ROTOR BLADES WHOSE SURFACE TEMPERATURE IS TO BE MEASURED. IN THE END PASSAGE ARE A SAPPHIRE OBJECT LENS VIEWING AND RECEIVING INFRARED FROM THE ROTOR BLADE. AT THE FOCUS OF THE OBJECTIVE LENS IS A QUARTZ FIELD LENS FOR FOCUSING THE INFRARED ENERGY ON AN INFRARED PHOTODETECTOR WITHIN THE TURBINE OR A QUARTZ OPTICAL FIBRE LEADING TO A PHOTODETECTOR OUTSIDE THE TURBINE. AS THE ROTOR BLADES PASS THE OBJECTIVE LENS THE PHOTODETECTOR PRODUCES A SERIES OF ELECTRICAL PULSES WHOSE AMPLITUDES ARE PROPORTIONAL TO THE BLADE TEMPERATURES. THE PULSES ARE SORTED, MEASURED AND THE TEMPERATURE OF EACH BLADE IS REGISTERED TO ALLOW THE DETECTION OF AN INDIVIDUAL OVERHEATED BLADE.
Inventors
- 👤 John A Decker Jr
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |