US3554015A
Expired / Lapsed
US
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Ultrasonic pulse-echo apparatus
Assignee: Branson Ultrasonics Corp
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Filing: 1968-03-22
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Granted: 1971-01-12
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Expires: 1988-03-22
Abstract
Abstract AN ULTRASONIC PULSE-ECHO TEST APPARATUS INCLUDES A FEEDBACK CIRCUIT COUPLED TO A REMOTE GAIN CONTROLLED VIDEO AMPLIFIER FOR MAINTAINING THE AMPLITUDE OF THE ECHO SIGNAL DISPLAYED ON A CATHODE RAY TUBE SUBSTANTIALLY CONSTANT. THE AMPLITUDE OF THE FEEDBACK SIGNAL REQUIRED TO MAINTAIN CONSTANT ECHO AMPLITUDE IS DISPLAYED ON A METER, INDICATING THE SIZE OF A FLAW IN RELATION TO A CALIBRATION SETTING. CONVENTIONAL SWITCHING OF ATTENUATORS IN AND OUT OF THE CIRCUIT TO DETERMINE FLAW SIZE IS ELIMINATED.
Inventors
- 👤 Kilian H Brech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:30
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/36; G01N29/40; G01N29/04; G01N29/11; G01N29/22; G01N29/30; Y; Y10; Y10S; Y10S73/00; Y10S73/90
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |