§
Luxuse
Patent Intelligence
Sign In
Patent GB2139757A successfully refreshed from Google Patents.
← Back to Patent Explorer
GB2139757A Expired / Lapsed GB ⏱️ 0.0 years remaining

Method of ultrasonic non-destructive testing

Assignee: SECR DEFENCE
•
Filing: 1984-05-09
•
Granted: —
•
Expires: 2004-05-09
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract The method uses spectral analysis of leaky Rayleigh waves to yield information relating to surface crack dimensions. The method comprises placing a transmitter transducer (20) to transmit toward an immersed test-piece (30), placing a receiver transducer (23) to receive from the test-piece, exciting the transmitter transducer to establish ultrasonic waves in the test-piece, positioning the receiver transducer at substantially the Rayleigh Critical Angle ( theta ) for the test-piece material with respect to the normal to the test-piece surface and recording the receiver transducer output for analysis. The receiver transducer may be on the same side of the test piece as the transmitter transducer, and the transducers may form a single transmitter/receiver transducer. <IMAGE>

Inventors

  • 👤 Leonard John Bond
  • 👤 Nader Saffari

Bibliographic Details

Application Number —
Jurisdiction GB
Data Source google_patents
Last Synchronized 2026-11-06 13:40
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/34; G01N29/348; G01N2291/00; G01N2291/04; G01N2291/048

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 76 words
A method for the non-destructive testing of a test-piece includes the steps of placing a transmitter transducer to transmit toward an immersed test piece, placing a receiver transducer to receive from the test-piece, exciting the transmitter transducer to establish ultrasonic waves in the test-piece, position ing the receiver transducer at substantially the Rayleigh Critical Angle for the test-piece material with respect to the normal to the test-piece surface and recording the receiver transducer output for analysis.
Claim 2
Independent Claim 76 words
A method for the non-destructive testing of a test-piece includes the steps of placing a transmitter transducer to transmit toward an immersed test piece, placing a receiver transducer to receive from the test-piece, exciting the transmitter transducer to establish ultrasonic waves in the test-piece, position ing the receiver transducer at substantially the Rayleigh Critical Angle for the test-piece material with respect to the normal to the test-piece surface and recording the receiver transducer output for analysis.
Claim 3
Dependent Claim 20 words
A method according to claim 1 and wherein the transmitter transducer and receiver transducer are combined into a transceiver transducer.
Claim 4
Independent Claim 22 words
A method substantially as hereinbefore described with reference to the accompanying specification any one of Figures 3,4 or 5 of the drawings.
Claim 5
Independent Claim 22 words
A method substantially as hereinbefore described with reference to the accompanying specification any one of Figures 3,4 or 5 of the drawings.

References Cited (Backward Citations)

GB714564A Cited
GB770397A Cited
GB780752A Cited
GB1171494A Cited
GB1330027A Cited
GB1426954A Cited
GB1464025A Cited
GB1551994A Cited
GB1558588A Cited
GB2014311A Cited
GB2054146A Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag