US3226981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condition responsive signal generator for producing a variable frequency signal
Assignee: North American Aviation Corp
•
Filing: 1962-10-29
•
Granted: 1966-01-04
•
Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 William D Mullins
- 👤 Doyle E Wilcox
- 👤 Roy H Mattson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:03
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/125; G01P2015/0805; G01P2015/0822; G01P2015/0825; G01P2015/0828
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN COMBINATION: A CAPACITOR WHOSE CAPACITANCE VARIES AS A FUNCTION OF ACCELERATION IN A PREDETERMINED DIRECTION; AN OPERATIONAL INTEGRATOR, INCLUDING SAID CAPACITOR CONNECTED BY ITS TERMINALS BETWEEN THE OUTPUT TERMINAL AND THE SUMMING JUNCTION OF SAID INTEGRATOR; POTENTIAL SOURCE MEANS PRODUCING TWO REFERENCE VOLTAGES OF DIFFERENT POTENTIAL, ONE OF SAID REFERENCE VOLTAGE BEING CONNECTED TO THE INPUT TERMINALS OF SAID INTEGRATOR; VOLTAGE COMPARISON MEANS, CONNECTED TO COMPARE THE VOLTAGE AT THE OUTPUT TERMINALS OF SAID INTEGRATOR
Claim 2
Dependent Claim
76 words
IN COMBINATION: A CAPACITOR WHOSE CAPACITANCE VARIES AS A FUNCTION OF ACCELERATION IN A PREDETERMINED DIRECTION; AN OPERATIONAL INTEGRATOR, INCLUDING SAID CAPACITOR CONNECTED BY ITS TERMINALS BETWEEN THE OUTPUT TERMINAL AND THE SUMMING JUNCTION OF SAID INTEGRATOR; POTENTIAL SOURCE MEANS PRODUCING TWO REFERENCE VOLTAGES OF DIFFERENT POTENTIAL, ONE OF SAID REFERENCE VOLTAGE BEING CONNECTED TO THE INPUT TERMINALS OF SAID INTEGRATOR; VOLTAGE COMPARISON MEANS, CONNECTED TO COMPARE THE VOLTAGE AT THE OUTPUT TERMINALS OF SAID INTEGRATOR
References Cited (Backward Citations)
US2899190A
Cited
US2697594A
Cited
US2908166A
Cited
US2917300A
Cited
US3025000A
Cited
US2980866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |