GB766983A - Improvements in devices for use in testing materials - Google Patents

Improvements in devices for use in testing materials

Info

Publication number
GB766983A
GB766983A GB1692951A GB1692951A GB766983A GB 766983 A GB766983 A GB 766983A GB 1692951 A GB1692951 A GB 1692951A GB 1692951 A GB1692951 A GB 1692951A GB 766983 A GB766983 A GB 766983A
Authority
GB
United Kingdom
Prior art keywords
laminations
velocity
thicker
epoxy resin
materials
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1692951A
Inventor
Geoffrey Bradfield
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB1692951A priority Critical patent/GB766983A/en
Publication of GB766983A publication Critical patent/GB766983A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

766,983. Laminated materials. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Oct. 17, 1952 [July 17, 1951], No. 16929/51. Class 140. [Also in Group XXXIX] An' ultrasonic wave coupling (see Group XXXIX) comprises alternate thin laminations of high and low wave velocity materials. The laminations 6 of high velocity material are of steel, silver, or brass and the other laminations 7 are of polymethyl methacrylate or epoxy resin applied as a cement or of laminated paper impregnated with phenol-formaldehyde resin and cemented with epoxy resin. The high velocity laminations 6 are thicker than the low velocity laminations 7. The laminations are not thicker than one-tenth of a wavelength of waves in the composite material at a frequency of ¢ Mc/s. A piezo-electric element 3 is mounted on the coupling.
GB1692951A 1951-07-17 1951-07-17 Improvements in devices for use in testing materials Expired GB766983A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1692951A GB766983A (en) 1951-07-17 1951-07-17 Improvements in devices for use in testing materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1692951A GB766983A (en) 1951-07-17 1951-07-17 Improvements in devices for use in testing materials

Publications (1)

Publication Number Publication Date
GB766983A true GB766983A (en) 1957-01-30

Family

ID=10086199

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1692951A Expired GB766983A (en) 1951-07-17 1951-07-17 Improvements in devices for use in testing materials

Country Status (1)

Country Link
GB (1) GB766983A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552021A (en) * 1982-12-30 1985-11-12 Fujitsu Limited Electro-sound transducer eliminating acoustic multi-reflection, and ultrasonic diagnostic apparatus applying it
WO1997003764A1 (en) * 1995-07-24 1997-02-06 Siemens Aktiengesellschaft Ultrasound transducer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552021A (en) * 1982-12-30 1985-11-12 Fujitsu Limited Electro-sound transducer eliminating acoustic multi-reflection, and ultrasonic diagnostic apparatus applying it
WO1997003764A1 (en) * 1995-07-24 1997-02-06 Siemens Aktiengesellschaft Ultrasound transducer
US6107722A (en) * 1995-07-24 2000-08-22 Siemens Ag Ultrasound transducer

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