US4566101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillatory failure monitor
Assignee: RTX Corp
•
Filing: 1983-02-28
•
Granted: 1986-01-21
•
Expires: 2003-02-28
Abstract
Abstract An oscillatory-failure monitor (101) compares a parameter of a plurality of signals (A, B) within a tolerance (TOL) to determine agreement or disparity among the signals. Each discrete miscompare occurrence (i.e., singular disparity following full agreement) is counted by incrementing (27; 54) a counter (OSCCT; CNTR). The counter is decremented (32; 62) whenever the signals compare for a predetermined time interval (29; 47). An oscillatory-failure is declared when the counter increments to a threshold (28, 21; 57, 58, 60). Both digital (FIG. 1) and dedicated hardware (FIG. 4) embodiments are disclosed.
Inventors
- 👤 Joseph P. Skonieczny
- 👤 Richard D. Murphy
- 👤 Douglas H. Clelford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:28
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/0038
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
An oscillatory-failure monitor that comprises: means (40, 41) for providing a plurality of signals, comparator means (45) for providing a compare signal (46) when a parameter of each signal of the plurality of signals is in agreement, within a tolerance, with the parameter of each of the other signals of the plurality of signals, in response to the plurality of signals; timer means (47) for providing a decrement signal in response to the sustained provision of the compare signal for a threshold interval of time; means (45, 49) for providing a discrete miscompare signal (55) upon each discrete occurance of at least a single disparity, without the tolerance, among the signal parameters, in response to the plurality of signals; counter means (56) for providing a count signal that increments in value in response to each discrete miscompare signal and that decrements in value in response to each provision of the decrement signal; means (58) for providing a fault indication in response to the count signal having incremented to a threshold value.
Claim 2
Dependent Claim
171 words
An oscillatory-failure monitor that comprises: means (40, 41) for providing a plurality of signals, comparator means (45) for providing a compare signal (46) when a parameter of each signal of the plurality of signals is in agreement, within a tolerance, with the parameter of each of the other signals of the plurality of signals, in response to the plurality of signals; timer means (47) for providing a decrement signal in response to the sustained provision of the compare signal for a threshold interval of time; means (45, 49) for providing a discrete miscompare signal (55) upon each discrete occurance of at least a single disparity, without the tolerance, among the signal parameters, in response to the plurality of signals; counter means (56) for providing a count signal that increments in value in response to each discrete miscompare signal and that decrements in value in response to each provision of the decrement signal; means (58) for providing a fault indication in response to the count signal having incremented to a threshold value.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |