US3197684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo synchronization circuit with lock-out prevention
Assignee: Lockheed Martin Corp
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Filing: 1961-08-28
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Granted: 1965-07-27
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Expires: 1981-08-28
Abstract
No abstract record available.
Inventors
- 👤 Riege Carl Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:59
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/121; G05D3/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A SYNCHRO LOOP WHEREIN THE MOTOR IS PROVIDED WITH MECHANICAL STOPS WHEREBY A LOCK CONDITION EXISTS BY VIRTUE OF SAID STOPS, THE IMPROVEMENT COMPRISING RELAY CONTACTS CONNECTED IN THE SYNCHRO LOOP, PHASE SHIFT NETWORKS, AND RELAY MEANS RESPONSIVE TO SAID LOCK CONDITION TO SHIFT ONE OF SAID RELAY CONTACTS FROM SAID SYNCHRO LOOP TO ONE OF SAID PHASE SHIFT NETWORKS TO DRIVE THE MOTOR FROM SAID LOCK CONDITION, TIMING MEANS FOR DE-ENERGIZING SAID RELAY MEANS AFTER A PREDETERMINED DELAY AND ISOLATION CIRCUIT MEANS TO PREVENT FURTHER OPERATION OF SAID RELAY MEANS AFTER SAID LOCK CONDITION IS ELIMINATED.
Claim 2
Dependent Claim
98 words
IN A SYNCHRO LOOP WHEREIN THE MOTOR IS PROVIDED WITH MECHANICAL STOPS WHEREBY A LOCK CONDITION EXISTS BY VIRTUE OF SAID STOPS, THE IMPROVEMENT COMPRISING RELAY CONTACTS CONNECTED IN THE SYNCHRO LOOP, PHASE SHIFT NETWORKS, AND RELAY MEANS RESPONSIVE TO SAID LOCK CONDITION TO SHIFT ONE OF SAID RELAY CONTACTS FROM SAID SYNCHRO LOOP TO ONE OF SAID PHASE SHIFT NETWORKS TO DRIVE THE MOTOR FROM SAID LOCK CONDITION, TIMING MEANS FOR DE-ENERGIZING SAID RELAY MEANS AFTER A PREDETERMINED DELAY AND ISOLATION CIRCUIT MEANS TO PREVENT FURTHER OPERATION OF SAID RELAY MEANS AFTER SAID LOCK CONDITION IS ELIMINATED.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |