Patent US3559198A successfully refreshed from Google Patents.
US3559198A
Expired / Lapsed
US
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Frequency responsive monitor for a redundant control system
Assignee: Bendix Corp
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Filing: 1966-04-25
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Granted: 1971-01-26
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Expires: 1986-04-25
Abstract
Abstract APPARATUS FOR MONITORING A CONTROL SYSTEM PROVIDING REDUNDANT SIGNALS, COMPRISING FIRST MEANS FOR PROVIDING AN OUTPUT AT A PREDETERMINED FREQUENCY, AND SECOND MEANS FOR COMPARING THE REDUNDANT SIGNALS PROVIDED BY THE CONTROL SYSTEM. THE SECOND MEANS IS CONNECTED TO THE FIRST MEANS FOR RENDERING SAID FIRST MEANS EFFECTIVE TO PROVIDE AN OUTPUT AT A FREQUENCY OTHER THAN THE PREDETERMINED FREQUENCY WHEN THE DIFFERENCE BETWEEN THE COMPARED SIGNALS EXCEEDS A PREDETERMINED LIMIT, WHEREUPON AN ALARM IS ACTUATED OR SIGNALLING A SYSTEM MALFUNCTION.
Inventors
- 👤 Harold Moreines
- 👤 Gunter J Gessner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:44
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/22; H03K5/24; G; G05; G05B; G05B9/00; G05B9/02; G05B9/03; G05D; G05D1/00; G05D1/0055; G05D1/0077; H03K5/01; H03K5/08; H03K5/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |