GB615684A - Improvements in or relating to electro-acoustic transducers - Google Patents

Improvements in or relating to electro-acoustic transducers

Info

Publication number
GB615684A
GB615684A GB19099/46A GB1909946A GB615684A GB 615684 A GB615684 A GB 615684A GB 19099/46 A GB19099/46 A GB 19099/46A GB 1909946 A GB1909946 A GB 1909946A GB 615684 A GB615684 A GB 615684A
Authority
GB
United Kingdom
Prior art keywords
liquid
crystal
container
waves
june
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
GB19099/46A
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.)
Sperry Products Inc
Original Assignee
Sperry Products Inc
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 Sperry Products Inc filed Critical Sperry Products Inc
Publication of GB615684A publication Critical patent/GB615684A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01N29/24—Probes
    • G01N29/2487—Directing probes, e.g. angle probes
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0421—Longitudinal waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0422—Shear waves, transverse waves, horizontally polarised waves

Abstract

615,684. Supersonic inspection apparatus. SPERRY PRODUCTS, Inc. June 26, 1946, No. 19099. Convention date, June 28, 1945. [Class 118 (ii)] [Also in Group XXXIX] Apparatus for inspecting the interior of a solid body comprises means for placing a liquid in contact with a surface of the body, means for transmitting a supersonic wave through the liquid at an angle of incidence with said surface sufficiently different from zero to avoid standing waves, and means for detecting waves emerging from said surface into the liquid. As shown, an X-cut crystal 10 secured to an insulating block 12 is inclined to the face 16 of the body 15 to be tested, and separated therefrom, the block being pivoted on a pin 20 and pulled by a spring 22 against an adjusting-screw 26. The crystal is mounted near the open end of a container 25 in a chamber defined by the body 15 and a' partition 23, and this chamber is filled with mercury or other liquid by means, for example, of a collapsable reservoir 35 attached to the container. By adjusting the inclination of the crystal and moving the container, inspection of parts of inaccessible bodies is facilitated. If desired, the inclination may be such that the longitudinal waves 41 do not penetrate the body and all of the refracted energy lies in the shear waves 42. The front and rear faces of the crystal may be curved to provide greater sensitivity in particular areas within the body 15. In a modification, two transducers, an emitter and a receiver are arranged in a tank filled with liquid through which a solid body to be tested is passed. The body is guided by rollers, and the crystals are mounted one at each side of the tank. Specification 571,817 is referred to.
GB19099/46A 1945-06-28 1946-06-26 Improvements in or relating to electro-acoustic transducers Expired GB615684A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US615684XA 1945-06-28 1945-06-28

Publications (1)

Publication Number Publication Date
GB615684A true GB615684A (en) 1949-01-10

Family

ID=22036617

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19099/46A Expired GB615684A (en) 1945-06-28 1946-06-26 Improvements in or relating to electro-acoustic transducers

Country Status (1)

Country Link
GB (1) GB615684A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587414A (en) * 1949-08-13 1952-02-26 Gen Electric Ultrasonic materials testing
US2725491A (en) * 1951-05-28 1955-11-29 United States Steel Corp Adapter for adjustably mounting angle search unit on contact shoe for ultrasonic shear-wave testing of tubular articles
US2795133A (en) * 1953-03-06 1957-06-11 Acec Apparatus for testing workpieces with ultrasonic waves
US3233449A (en) * 1960-10-06 1966-02-08 Republic Steel Corp Method and apparatus for ultrasonic testing of pipe
US3302453A (en) * 1963-04-15 1967-02-07 American Mach & Foundry Method of inspection utilizing ultrasonic energy
FR2377134A1 (en) * 1977-01-06 1978-08-04 Stanford Research Inst ULTRASONIC EXAMINATION TRANSDUCER
WO2008077566A3 (en) * 2006-12-22 2008-09-12 Giesecke & Devrient Gmbh Device for outputting and/or receiving ultrasound and ultrasound sensor for inspecting a valuable document

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587414A (en) * 1949-08-13 1952-02-26 Gen Electric Ultrasonic materials testing
US2725491A (en) * 1951-05-28 1955-11-29 United States Steel Corp Adapter for adjustably mounting angle search unit on contact shoe for ultrasonic shear-wave testing of tubular articles
US2795133A (en) * 1953-03-06 1957-06-11 Acec Apparatus for testing workpieces with ultrasonic waves
US3233449A (en) * 1960-10-06 1966-02-08 Republic Steel Corp Method and apparatus for ultrasonic testing of pipe
US3302453A (en) * 1963-04-15 1967-02-07 American Mach & Foundry Method of inspection utilizing ultrasonic energy
FR2377134A1 (en) * 1977-01-06 1978-08-04 Stanford Research Inst ULTRASONIC EXAMINATION TRANSDUCER
WO2008077566A3 (en) * 2006-12-22 2008-09-12 Giesecke & Devrient Gmbh Device for outputting and/or receiving ultrasound and ultrasound sensor for inspecting a valuable document
EP2477162A1 (en) * 2006-12-22 2012-07-18 Giesecke & Devrient GmbH Ultrasound sensor for examining a valuable document
US8230742B2 (en) 2006-12-22 2012-07-31 Giesecke & Devrient Gmbh Device for outputting and/or receiving ultrasound and ultrasound sensor for inspecting a valuable document
US9194845B2 (en) 2006-12-22 2015-11-24 Giesecke & Devrient Gmbh Device for outputting and/or receiving ultrasound and ultrasound sensor for inspecting a valuable document

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