US3351852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphical nulling device for nondestructive eddy current testing equipment
Assignee: Individual
•
Filing: 1964-08-26
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Granted: 1967-11-07
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Expires: 1984-08-26
Abstract
No abstract record available.
Inventors
- 👤 Hugo L Libby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:26
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9046; G01N27/9073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN AN EDDY CURRENT NONDESTRUCTIVE TESTING DEVICE HAVING A TEST COIL, MEANS FOR EXCITING SAID COIL AND MEANS FOR MEASURING THE OUTPUT SIGNAL OF SAID COIL, THE COMBINATION WITH SAID TEST COIL, SAID EXCITING MEANS AND SAID MEASURING MEANS OF A BASE, PAPER, MEANS FOR MOUNTING SAID PAPER ON SAID BASE, A MEMBER HAVING FIRST AND SECOND ENDS, MEANS FOR PIVOTALLY MOUNTING SAID MEMBER AT THE FIRST END THEREOF TO SAID BASE, MARKING MEANS, MEANS FOR SLIDABLY MOUNTING SAID MARKING MEANS ON SAID MEMBER ENGAGEABLE WITH SAID PAPER, MEANS FOR GENERATING A SIGNAL RESPONSIVE IN AMPLITUDE TO THE POSITION OF SAID MARKING MEANS ALONG SAID MEMBER AND IN PHASE TO THE ANGULAR POSITION OF SAID MEMBER IN THE PLANE OF THE PAPER, AND MEANS FOR COMBINING SAID GENERATED SIGNAL AND THE OUTPUT SIGNAL OF SAID TEST COIL TO EFFECT A NULL RESULTANT SIGNAL INPUT TO SAID TEST COIL SIGNAL MEASURING MEANS.
Claim 2
Dependent Claim
151 words
IN AN EDDY CURRENT NONDESTRUCTIVE TESTING DEVICE HAVING A TEST COIL, MEANS FOR EXCITING SAID COIL AND MEANS FOR MEASURING THE OUTPUT SIGNAL OF SAID COIL, THE COMBINATION WITH SAID TEST COIL, SAID EXCITING MEANS AND SAID MEASURING MEANS OF A BASE, PAPER, MEANS FOR MOUNTING SAID PAPER ON SAID BASE, A MEMBER HAVING FIRST AND SECOND ENDS, MEANS FOR PIVOTALLY MOUNTING SAID MEMBER AT THE FIRST END THEREOF TO SAID BASE, MARKING MEANS, MEANS FOR SLIDABLY MOUNTING SAID MARKING MEANS ON SAID MEMBER ENGAGEABLE WITH SAID PAPER, MEANS FOR GENERATING A SIGNAL RESPONSIVE IN AMPLITUDE TO THE POSITION OF SAID MARKING MEANS ALONG SAID MEMBER AND IN PHASE TO THE ANGULAR POSITION OF SAID MEMBER IN THE PLANE OF THE PAPER, AND MEANS FOR COMBINING SAID GENERATED SIGNAL AND THE OUTPUT SIGNAL OF SAID TEST COIL TO EFFECT A NULL RESULTANT SIGNAL INPUT TO SAID TEST COIL SIGNAL MEASURING MEANS.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |