US3177347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining the dynamic response of a system
Assignee: Shell USA Inc
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Filing: 1959-02-25
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Granted: 1965-04-06
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Expires: 1979-02-25
Abstract
No abstract record available.
Inventors
- 👤 Percy Edward A Cowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:27
CPC Classifications
G; G05; G05B; G05B23/00; G05B23/02; G05B23/0205; G05B23/0218; G05B23/0256
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
AN APPARATUS FOR DETERMINING THE DYNAMIC RESPONSE OF A CONTROL SYSTEM COMPRISING: APPARATUS FOR GENERATING ELECTRICAL SINE AND COSINE WAVES; CONTROL MEANS RESPONSIVE TO ONE OF SAID WAVES FOR DISTURBING THE CONTROL SYSTEM IN RESPONSE TO SAID ONE WAVE; MEASURING MEANS FOR MEASURING THE CONTROL SYSTEM RESPONSE AT PREDETERMINED POINTS TO SAID DISTURBANCE AND SUPPLYING SAID RESPONSE AS ELECTRICAL SIGNALS; FILTERING CIRCUITS FOR REMOVING ALL OF THE FREQUENCIES IN SAID ELECTRICAL SIGNALS BELOW A PREDETERMINED FREQUENCY; CIRCUIT MEANS FOR MULTIPLYING EACH OF SAID FILTERED ELECTRICAL SIGNALS BY INDIVIDUALLY SAID SINE AND COSINE WAVES; COMPUTER MEANS RESPONSIVE TO THE OUTPUTS OF SAID CIRCUIT MEANS FOR INTEGRATING SAID OUTPUTS OVER A PERIOD EQUAL TO AT LEAST A FEW CYCLES OF SAID WAVES AND SUPPLYING AN ELECTRICAL SIGNAL PROPORTIONAL TO BOTH THE SINE WAVE COMPONENT AND COSINE WAVE COMPONENT OF THE SYSTEM RESPONSE; AND ADDITIONAL MEANS FOR VECTORIALLY ADDING SAID INTEGRATED RESULTS OF THE SINE AND COSINE WAVES TO OBTAIN A VECTOR WHOSE MAGNITUDE IS PROPORTIONAL TO THE RESPONSE OF THE CONTROL SYSTEM AND WHOSE PHASE ANGLE IS PROPORTIONAL TO THE PHASE LAG OF THE SYSTEM.
Claim 2
Independent Claim
183 words
AN APPARATUS FOR DETERMINING THE DYNAMIC RESPONSE OF A CONTROL SYSTEM COMPRISING: APPARATUS FOR GENERATING ELECTRICAL SINE AND COSINE WAVES; CONTROL MEANS RESPONSIVE TO ONE OF SAID WAVES FOR DISTURBING THE CONTROL SYSTEM IN RESPONSE TO SAID ONE WAVE; MEASURING MEANS FOR MEASURING THE CONTROL SYSTEM RESPONSE AT PREDETERMINED POINTS TO SAID DISTURBANCE AND SUPPLYING SAID RESPONSE AS ELECTRICAL SIGNALS; FILTERING CIRCUITS FOR REMOVING ALL OF THE FREQUENCIES IN SAID ELECTRICAL SIGNALS BELOW A PREDETERMINED FREQUENCY; CIRCUIT MEANS FOR MULTIPLYING EACH OF SAID FILTERED ELECTRICAL SIGNALS BY INDIVIDUALLY SAID SINE AND COSINE WAVES; COMPUTER MEANS RESPONSIVE TO THE OUTPUTS OF SAID CIRCUIT MEANS FOR INTEGRATING SAID OUTPUTS OVER A PERIOD EQUAL TO AT LEAST A FEW CYCLES OF SAID WAVES AND SUPPLYING AN ELECTRICAL SIGNAL PROPORTIONAL TO BOTH THE SINE WAVE COMPONENT AND COSINE WAVE COMPONENT OF THE SYSTEM RESPONSE; AND ADDITIONAL MEANS FOR VECTORIALLY ADDING SAID INTEGRATED RESULTS OF THE SINE AND COSINE WAVES TO OBTAIN A VECTOR WHOSE MAGNITUDE IS PROPORTIONAL TO THE RESPONSE OF THE CONTROL SYSTEM AND WHOSE PHASE ANGLE IS PROPORTIONAL TO THE PHASE LAG OF THE SYSTEM.
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |