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Ultrasonic wave system wind velocity meter
R. et Uf. Isopentane bond for low-temperature ultrasonics. Review of Scientific Instruments, 35, 8, 1077 (1964) Isopentane @methyl-butane, melting point 112*5”K, boiling point 303°K) has been found to be a good bonding and coupling medium for low temperature work. It can be cycled between liquid nitrogen down to liquid helium temperatures over prolonged periods and between surfaces of greatly different coefficients of expansion. This is a brief note describing the technique of bonding a lead zirconate titanate transducer to a solid sample while keeping the sample below 105°K except for almost instantaneous excursions above it. (2 references) (Ultrasonics 1965, abstract 323) STERN,
c. hf. The present status of non-destructive testing in steel foundries. Metallurgia, 70, 417, 25 (1964) This paper is based on the analysis of replies to a questionnaire which was sent out by B.S.C.R.A. to member companies. This factual information is intended for steel foundries in general as well as for designers and users of steel castings. The author gives a brief historical review of the various non-destructive testing methods available and their relative incidence. According to his histograms there are more ultrasonic than X-ray equipments in use. (6 figures, 24 references) (Ultrasonics 1965, abstract 324) STOCH,
WILKINSON,
L.
Thickness measurements in hot pipes. British Journal of Non-Destructive Testing, 6, 3, 94 (1964) Special techniques are used in oil refining industry to assess the loss of metal in pipes or vessels due to erosion or corrosion. Continuous measurement using pulse-echo or resonance techniques can be carried out while the plant is in operation. To allow work at the high temperatures encountered (up to 1500°F) the author describes three different testing probes. Advantages and limitations of all three types are discussed. (2 references, 6 figures) (Ultrasonics 196.5, abstract 325)
YOUNG,G. F. and LELE, P. P. Focal lesions in the brain of growing rabbits prodaced by ukrasoMd. Experimental Neurology, 9, 6, 502 (1964). Trackless foci of necrosis can be produced at preselected regions within the brain by transdural irradiation with a single beam of focussed ultrasound. Similar lesions can also be made in foetal rabbits in situ at a gestation age of 24 days. The object of this study was to determine whether the production of discreet lesions was dependent on the age of the animal and to investigate the value of ultrasound in experimental neuroembryology. Histologically the lesions were the same regardless of the age of the animal. (6 figures, 6 references) (Ultrasonics 1965, abstract 326)
Coloared acrylic sheet irradiated with ultrasonics. Modern Plastics, 41, 12, 95 (1964) The latest application of the ultrasonic homogenizer or liquid whistle is the mixing of pigments and casting monomers. It is used in the production of high quality methacrylate sheet for lighting panels and display signs where the conventional dispersion equipment does not produce the required quality. It works as part of a production line and can successfully disperse barium sulphate, zinc oxide, titanium dioxide and cadmium pigments. (2 photographs) (Ultrasonics 1965, abstract 327)
Ultrasonic power speeds cleaning in large conveyorizcd lines. Iron Age, 194, 10, 64 (1964) This is a description of the Magnapak Mark 2 transducer manufactured by Westinghouse Electric Corporation and the solid-state Magnatrak power generator. The transducer is of the spaced-lamination design, can operate continuously at 110°C at power tensities of 20 W/in=. It is suitable for continuous conveyor-belt operation, where speeds of 200 ft/min are claimed. The equipment can reduce the length of conventional pickling line by 30% and maintain microscopic cleanliness in large numbers of small or big objects (3 photographs) (Ultrasonics 1965, abstract 328) Ultrasonic wave system wiud velocity meter. Japan Eleo tronics, 5, No. 10, 11 (1964) Under the heading “Electronic equipment to be used for the Olympic games” a brief description is given of the official ultrasonic wind velocity meter. It can function at temperatures between -10°C and 50°C and covers a dynamic range of O-30 m/s with an accuracy of 0.01 m/s. Two pairs of transducers, one transmitter and one receiver positioned at diagonally opposite corners of a rectangle can detect the frequency shift produced by any air disturbance. The portable transistor equipment is direction sensitive and the electronically integrated signals give direct reading in any calibrated units. (1 photograph) (Ultrasonics 1965, abstract 329) Homogenization by ultrasonics. Skinners Record, 38, 1, p. 31 (1964) A description of the working principle, development and use of some commercially available ultrasonic liquid whistles used for homogenization of immiscible liquids or the dispersion of small particles. A liquid whistle consists essentially of a pump and a vibrating vane: the ultrasonic energy is generated by the flow of the liquids. It is claimed that the uses are many, such as emulsification and dispersion of waxes, resins, polymers and carbon black and that the technique can be used in a number of textile finishing processes. (10 figures, 10 references) (Ultrasonics 1964, abstract 330) Angled sound waves Gad fiaws. Iron Age, 193, No. 7, p. 87 (1964) A variable angle wheel, especially useful for Lamb wave inspection of thin sheet, where transducers are mounted on the axle of a liquid filled tyre, combines the advantages of contact and immersion testing. Developed by Sperry Products, the angle of the beam can be varied in the forward, reverse or sideways direction with respect to the traversing tyre so as for instance to generate Lamb waves in a helical pattern in tubular material. Some advantages claimed for the wheel are consistent test results on rough surfaces, elimination of immersion tanks, minimum coupling fluid and high testing speed. See also: Light Metal Age, 22, Nos. 1 and 2, p. 16 (1964) (Ultrasonics 1964, abstract 331) Recommended ultrasouic acceptance staudards for airframe alumiuium alloy plate, extrusions and forgings. Materials Evaulation, 2, 8, 366 (1964) This revised report (No. 1 dated 1964) of the airframe subcommittee of the Society of Non-Destructive Testing Inc. supersedes all previous reports and deals with guaranteed quality of certain aluminium alloy fabrications. The recommended standards have been approved by airframe committee members representing eight manufacturers and eight ahuninium suppliers. Twelve paragraphs specify the scope, discontinuity limits, equipment, technique and marking. The standard might be useful as a rough guide to acceptance specifkations in other countries and industries. (Ultrasonics Z964, abstract 332)
uL-msomcs/
January-March
1945
c. hf. The present status of non-destructive testing in steel foundries. Metallurgia, 70, 417, 25 (1964) This paper is based on the analysis of replies to a questionnaire which was sent out by B.S.C.R.A. to member companies. This factual information is intended for steel foundries in general as well as for designers and users of steel castings. The author gives a brief historical review of the various non-destructive testing methods available and their relative incidence. According to his histograms there are more ultrasonic than X-ray equipments in use. (6 figures, 24 references) (Ultrasonics 1965, abstract 324) STOCH,
WILKINSON,
L.
Thickness measurements in hot pipes. British Journal of Non-Destructive Testing, 6, 3, 94 (1964) Special techniques are used in oil refining industry to assess the loss of metal in pipes or vessels due to erosion or corrosion. Continuous measurement using pulse-echo or resonance techniques can be carried out while the plant is in operation. To allow work at the high temperatures encountered (up to 1500°F) the author describes three different testing probes. Advantages and limitations of all three types are discussed. (2 references, 6 figures) (Ultrasonics 196.5, abstract 325)
YOUNG,G. F. and LELE, P. P. Focal lesions in the brain of growing rabbits prodaced by ukrasoMd. Experimental Neurology, 9, 6, 502 (1964). Trackless foci of necrosis can be produced at preselected regions within the brain by transdural irradiation with a single beam of focussed ultrasound. Similar lesions can also be made in foetal rabbits in situ at a gestation age of 24 days. The object of this study was to determine whether the production of discreet lesions was dependent on the age of the animal and to investigate the value of ultrasound in experimental neuroembryology. Histologically the lesions were the same regardless of the age of the animal. (6 figures, 6 references) (Ultrasonics 1965, abstract 326)
Coloared acrylic sheet irradiated with ultrasonics. Modern Plastics, 41, 12, 95 (1964) The latest application of the ultrasonic homogenizer or liquid whistle is the mixing of pigments and casting monomers. It is used in the production of high quality methacrylate sheet for lighting panels and display signs where the conventional dispersion equipment does not produce the required quality. It works as part of a production line and can successfully disperse barium sulphate, zinc oxide, titanium dioxide and cadmium pigments. (2 photographs) (Ultrasonics 1965, abstract 327)
Ultrasonic power speeds cleaning in large conveyorizcd lines. Iron Age, 194, 10, 64 (1964) This is a description of the Magnapak Mark 2 transducer manufactured by Westinghouse Electric Corporation and the solid-state Magnatrak power generator. The transducer is of the spaced-lamination design, can operate continuously at 110°C at power tensities of 20 W/in=. It is suitable for continuous conveyor-belt operation, where speeds of 200 ft/min are claimed. The equipment can reduce the length of conventional pickling line by 30% and maintain microscopic cleanliness in large numbers of small or big objects (3 photographs) (Ultrasonics 1965, abstract 328) Ultrasonic wave system wiud velocity meter. Japan Eleo tronics, 5, No. 10, 11 (1964) Under the heading “Electronic equipment to be used for the Olympic games” a brief description is given of the official ultrasonic wind velocity meter. It can function at temperatures between -10°C and 50°C and covers a dynamic range of O-30 m/s with an accuracy of 0.01 m/s. Two pairs of transducers, one transmitter and one receiver positioned at diagonally opposite corners of a rectangle can detect the frequency shift produced by any air disturbance. The portable transistor equipment is direction sensitive and the electronically integrated signals give direct reading in any calibrated units. (1 photograph) (Ultrasonics 1965, abstract 329) Homogenization by ultrasonics. Skinners Record, 38, 1, p. 31 (1964) A description of the working principle, development and use of some commercially available ultrasonic liquid whistles used for homogenization of immiscible liquids or the dispersion of small particles. A liquid whistle consists essentially of a pump and a vibrating vane: the ultrasonic energy is generated by the flow of the liquids. It is claimed that the uses are many, such as emulsification and dispersion of waxes, resins, polymers and carbon black and that the technique can be used in a number of textile finishing processes. (10 figures, 10 references) (Ultrasonics 1964, abstract 330) Angled sound waves Gad fiaws. Iron Age, 193, No. 7, p. 87 (1964) A variable angle wheel, especially useful for Lamb wave inspection of thin sheet, where transducers are mounted on the axle of a liquid filled tyre, combines the advantages of contact and immersion testing. Developed by Sperry Products, the angle of the beam can be varied in the forward, reverse or sideways direction with respect to the traversing tyre so as for instance to generate Lamb waves in a helical pattern in tubular material. Some advantages claimed for the wheel are consistent test results on rough surfaces, elimination of immersion tanks, minimum coupling fluid and high testing speed. See also: Light Metal Age, 22, Nos. 1 and 2, p. 16 (1964) (Ultrasonics 1964, abstract 331) Recommended ultrasouic acceptance staudards for airframe alumiuium alloy plate, extrusions and forgings. Materials Evaulation, 2, 8, 366 (1964) This revised report (No. 1 dated 1964) of the airframe subcommittee of the Society of Non-Destructive Testing Inc. supersedes all previous reports and deals with guaranteed quality of certain aluminium alloy fabrications. The recommended standards have been approved by airframe committee members representing eight manufacturers and eight ahuninium suppliers. Twelve paragraphs specify the scope, discontinuity limits, equipment, technique and marking. The standard might be useful as a rough guide to acceptance specifkations in other countries and industries. (Ultrasonics Z964, abstract 332)
uL-msomcs/
January-March
1945