US3593569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic testing apparatus
Assignee: STD Services Ltd
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Filing: 1968-03-11
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Granted: 1971-07-20
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Expires: 1988-03-11
Abstract
Abstract Ultrasonic-testing apparatus in which a series of transducers are pulsed and scanned under the control of two ring counters, one controlling the pulsing sequence and the other controlling the scanning sequence, with a device for varying the phase relationship of the counters to vary the mode of testing.
Inventors
- 👤 Donald Malcolm Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:50
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/26; G01N29/262; Y; Y10; Y10S; Y10S73/00; Y10S73/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
188 words
Apparatus for testing elongated workpieces for flaws by ultrasonics comprising a plurality of transducers arranged so as to surround a workpiece to be tested; a plurality of energizing means associated with the respective transducers and adapted, when triggered, to energize the respective transducers to transmit ultrasonic waves; detector means arranged to receive signals from the respective transducers when ultrasonic waves are received thereby; timing pulse generator means for generating a pulse train; first sequence control means associated with said energizing means and connected to the pulse generator means to trigger said energizing means sequentially on receipt of successive pulses from the pulse generator means; second sequence control means associated with said detector means and connected to the pulse generator means to effectively connect said detector means to said transducers sequentially on receipt of successive pulses from the pulse generator means; and an adjustable phase control means for adjusting the phase relationship to said first sequence control means relative to said second sequence control means causing said first and second sequence control means to be selectively operated in phase or in one or more discrete steps out of phase.
Claim 2
Dependent Claim
188 words
Apparatus for testing elongated workpieces for flaws by ultrasonics comprising a plurality of transducers arranged so as to surround a workpiece to be tested; a plurality of energizing means associated with the respective transducers and adapted, when triggered, to energize the respective transducers to transmit ultrasonic waves; detector means arranged to receive signals from the respective transducers when ultrasonic waves are received thereby; timing pulse generator means for generating a pulse train; first sequence control means associated with said energizing means and connected to the pulse generator means to trigger said energizing means sequentially on receipt of successive pulses from the pulse generator means; second sequence control means associated with said detector means and connected to the pulse generator means to effectively connect said detector means to said transducers sequentially on receipt of successive pulses from the pulse generator means; and an adjustable phase control means for adjusting the phase relationship to said first sequence control means relative to said second sequence control means causing said first and second sequence control means to be selectively operated in phase or in one or more discrete steps out of phase.
Claim 3
Dependent Claim
122 words
Apparatus as claimed in claim 1 in which said first and second sequence control means comprise two ring counters each constituted by a plurality of bistable stages cross-connected so that one stage is in a different stable state from the remaining stages; said phase control means includes a reset circuit for resetting said ring counters, said reset circuit being connected in a predetermined manner to one counter and containing a selector switch connecting said reset circuit to the other counter whereby, on actuation of said reset circuit a predetermined one of the stages of said one ring counter is driven into said different state, whereas a selected one of said stages of said other ring counter is driven into said different state.
Claim 4
Dependent Claim
61 words
Apparatus as claimed in claim 2 further comprising a warning device connected to the output of said predetermined one of the stages of said one counter and to the outputs of a plurality of the stages of said other counter through means sensitive to the position of the selector switch to indicate if the desired phase relationship has not been attained.
Claim 5
Dependent Claim
56 words
Apparatus as claimed in claim 1 further comprising a housing having a passage therethrough for receiving a workpiece for testing; a plurality of transducer carriers on which the transducers are respectively mounted, said transducer carriers being pivotable about axes parallel to said passage; and means for simultaneously adjusting all of said carriers about said pivotal axes.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |