US3337796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eddy current testing device with means for sampling the output signal to provide a signal proportional to the instantaneous value of said output signal at a particular phase
Assignee: Automation Forster Inc
•
Filing: 1965-04-19
•
Granted: 1967-08-22
•
Expires: 1985-04-19
Abstract
No abstract record available.
Inventors
- 👤 Rudolf G Hentschel
- 👤 Eric M Aupperle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:06
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN AN EDDY CURRENT TESTING DEVICE A SOURCE OF ALTERNATING CURRENT, TEST COIL MEANS COUPLED TO SAID SOURCE AND ARRANGED TO BE LOADED BY A STRUCTURE UNDER TEST, SAID COIL MEANS BEING RESPONSIVE TO LOADING BY SAID STRUCTURE TO PROVIDE AN OUTPUT SIGNAL WHICH VARIES IN PHASE AND AMPLITUDE IN ACCORDANCE WITH CHARACTERISTICS OF SAID STRUCTURE, MEANS COUPLED TO SAID SOURCE FOR PROVIDING A SAMPLING SIGNAL HAVING A PREDETERMINED PHASE RELATION TO SAID ALTERNATING CURRENT, SAMPLING MEANS RESPONSIVE TO SAID SAMPLING SIGNAL AND SAID OUTPUT SIGNAL TO PROVIDE A COMPONENT SIGNAL PROPORTIONAL TO THE INSTANTANEOUS VALUE OF SAID OUTPUT SIGNAL AT SAID PHASE, AND MEANS COUPLED TO THE SAMPLING MEANS AND RESPONSIVE TO SAID COMPONENT SIGNAL.
Claim 2
Dependent Claim
116 words
IN AN EDDY CURRENT TESTING DEVICE A SOURCE OF ALTERNATING CURRENT, TEST COIL MEANS COUPLED TO SAID SOURCE AND ARRANGED TO BE LOADED BY A STRUCTURE UNDER TEST, SAID COIL MEANS BEING RESPONSIVE TO LOADING BY SAID STRUCTURE TO PROVIDE AN OUTPUT SIGNAL WHICH VARIES IN PHASE AND AMPLITUDE IN ACCORDANCE WITH CHARACTERISTICS OF SAID STRUCTURE, MEANS COUPLED TO SAID SOURCE FOR PROVIDING A SAMPLING SIGNAL HAVING A PREDETERMINED PHASE RELATION TO SAID ALTERNATING CURRENT, SAMPLING MEANS RESPONSIVE TO SAID SAMPLING SIGNAL AND SAID OUTPUT SIGNAL TO PROVIDE A COMPONENT SIGNAL PROPORTIONAL TO THE INSTANTANEOUS VALUE OF SAID OUTPUT SIGNAL AT SAID PHASE, AND MEANS COUPLED TO THE SAMPLING MEANS AND RESPONSIVE TO SAID COMPONENT SIGNAL.
References Cited (Backward Citations)
US2920269A
Cited
US3159784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |