Variable delay line oscillator
Abstract
Abstract THE FREQUENCY OF NEGATIVE FEEDBACK TYPE FLUIDIC OSCILLATOR IS RENDERED VARIABLE BY INTRODUCING CONTROL FLUID FLOW TO EITHER AID OR OPPOSE THE FEEDBACK FLOW. THE CONTROL FLUID FLOWS ADJCENT, ABOUT OR WITHIN THE FEEDBACK FLUID IN AN ENLARGED SECTION OF THE FEEDBACK PASSAGE, AND MAY HVE A VARIABLE FLOW RATE WHICH FREQUENCY-MODULATES THE OSCILLATOR OUTPUT SIGNAL. THE OSCILLATOR MAY BE EMPLOYEED AS A FLOW SENSOR WHEN THE CONTROL FLUID IS SUPPLIED FROM THE FLOW BEING MONITORED. ALTERNATELY, IF THE ENLARGED SECTION OF THE FEEDBACK PASSAGE IS CURVED ABOUT A PREDETERMINED AXIS, ROTATION OF THE SYSTEM ABOUT THAT AXIS INTRODUCES CONTROL FLOW VARIATIONS WHICH VARY THE OSCILLATOR FREQUENCY AS A FUNCTION OF ANGULAR ACCELERATION OD THE SYSTEM ABOUT THAT AXIS.
Inventors
- 👤 Eric E Metzger
Bibliographic Details
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |