- Email: [email protected]
Square plate shaped piezo-electric resonator for electric filter utilising circumferential vibration
which may be moved relative to each other. One of the elements has an integral construction of multiple members, its ends being insulated relative to each other. The other element is made a pickoff element. (1310) Acoustic wave generator Gulf General Atomic Inc British Patent 1, 139,661 (8 January 1969) A method of periodically generating acoustic waves in water or in the ground makes use of a platten which is vibrated against the surface of the water or the ground. The platten is activated by a hydraulic motor and spring-loaded coupling. (1311) Ultrasonic holography giving colours Holotron Corporation French Patent 1,557.837 (21 February 1969) (Applied for 29 December 1967) (In USA 30 December 1966) The holographic method used is one of surface deformation. Two transducers, one a reference and the other ensonifying the object are directed at a water surface. The surface hologram is recorded by reflecting light down upon it and up on to a photographic plate. The transducers work at at least two frequencies so that a multiple image can be recorded. Each image is reconstructed in a different colour. (1312) Transmission and reception device for ultrasonic energy Institute de Recherche (France) Japanese Patent JPC 519/69 (11 January 1969) (Applied for 3 January 1964) At least two ultrasonic transducers of different resonance frequency are connected in parallel with a resonance circuit of frequency intermediate to those of the transducer. both the resonance circuit and the transducers being fed from the same pulse generator. (13131 Full rotary angle transducer Myojyo Denki Japanese Patent JPC 508169 (11 January 1969) (Applied for March 2.6 1965) An endless transducer is used as an angular transducer having at least three terminals. An ‘angle signal’ is obtained by using the relative differences between signals from the different terminals and if necessary this may be averaged to obtain the average angle of the transducer. (13141 Holographic technique for determining the phase of vibrating objects Neumann, B., Jacobson, F. and Brown, M. Paper TuCl6,1969 Spring Meeting of Optical Society of America (11-14 March 1969, San Diego, California, USA) Vibration analysis by time-average holography can provide much information about the amplitude of various points of a vibrating object but provides no information about the relative phase between points of the object. Reconstructed images of such holograms vary in brightness from point to point. Since light reflected from moving-object points is Doppler shifted, the fringes formed by interfering this light with the unshifted referencebeam light move in space. The hologram exposure integration therefore records fringes with reduced contrast and dim construction. Reflecting the reference beam from a mirror that vibrates at the object frequency, with some phase and amplitude, however also shifts the reference-beam light. Light reflected from object points vibrating with that same phase and amplitude would yield stationary fringes when interfered with the shifted reference beam. The reconstructed image of those points would be bright, thus giving an apparent node. The actual node will be reduced in brightness, since light reflected from nodal points is not doppler-shifted to match the reference. It is shown theoretically and experimentally how the vibrating-mirror technique can provide phase information in addition to the usual amplitude information. (1315)
206
ULTRASONICS
July
1969
Square plate shaped piezo-electric resonator for electric filter utilising circumferential vibration Nippon Tokushu Togyo kk Japanese Patent JPC 28211/68 (4 December 1968) (Applied for 18 September 1963) The edges of a square plate-shaped piezoelectric resonator are partially notched thereby substantially increasing its circumference, and decreasing a resonance frequency of circumferential vibration. (1316) The grain dependence of the electromechanical properties in lead zirconate-titanate ceramics Webster, A. H., Weston, T. B. Journal of the Canadian Ceramic Society, Vol 37 (1968) pp XLI-XLV A series of specimen discs fabricated from co-precipitated hydroxides and sintered at different times was examined before and after poling as to dielectric and mechanical losses. Grain sizes were determined by averaging along various intercepts on the discs. Graphs showing the variation of dielectric constant, dissipation factor, radial coupling factor, permanent polarization and mechanical quality factor versus grain size are given; the most notable result being the independence of coercive field and grain size-a result contradicted by other workers in the field. (131’71 Variations in properties with composition in lead zircon&e-titan&e ceramics Weston. T. B.. Webster, A. H.,McNamara,V. M Journal of the Canadian Ceramic Society Vol 36, (1967) pp xv-xx The paper reinvestigates the composition of zirconate-titanates at the maxima of their dielectric constant and electromechanical coupling factor. The samples used were prepared by cold pressing and entering from co-precipitated powders (using thirteen different compositions), measurements were made both before and after poling and also at various temperatures. variation in PDO content was also considered. Results are given, together with a simultaneous check on physical and chemical properties (grain size. sintered density, etc). in graphic form. A hitherto unknown inhomogenity at a composition with 0. 529 mole fraction zirconate is pointed out. (1318) Contactless excitation of ultrasound in mol ten metals Arkin,M. Ya., et al Soviet Physics-Acoustics, Vol 14. NO 3 (January-March 1969) pp 290-295 (1319) Acoustic wave producing device (Underwater high power pulse emitter) Balashkand, M. I., et al US Patent 3,416,621 (17 December 19681 (Filed 6 March 19671 (1320) Variable size ultrasonic beam producing transducer Beaujard, L., Mandart. J. US Patent 3, 416, 366 (1’7 December 1968) (Filed 17 August 1965) (1321) Ultra-fast holography Buges J. C., et al Bulletin dInformations Scientifiques et Techniques, No 130 (October 1968) p 53 (In French: English abstracts) (13221 Transducers and switches Dunachie, G. R. Electronic Components, Vol 10, No 2 (February 1969) p 173 (1323) Acoustic holography: a progress report El- Sum, H. Laser Focus, Vol 5, No 3 (February 1969) p 40 (1324) Device for the transformation of electrical impulses into sound waves Espro GmbH and Co French Patent 1,554,618 (24 January 1969) (Applied for 7 April 1967) (13251
Ultrasonic visualization system employing new scanning and presentation methods (Employing an on-line digital computer) Fry,W.J.,et al Journal of the Acoustical Society of America, Vol 44, No 5 (November 19681 pp 1324-1338 (13261 Vibrating transducer for flow and other related measurements Jacobs, R. B. USA Patent 3.426,593 (11 February 1969) (Filed 23 December 1965) (1327) Ultrasonic field stimulated in a rod by a piston source Kasatkin , B A. Defectoscopy (English Translation), No 1 (January-February 19671 pp 23-27 (1328) Growth and study of thin ZnO Films Kenigsberg, N. L., Chernets, A. N. Fizika Tverdogo Tela, Vol 10, No 9 (September 1968) pp 2834-2836 (In Russian, English translation in Soviet Physics-Solid State) (1329) Excitation of Lamb waves in Cds single cry stals Kucherov, 1. Ya.,Ostroskii, 1. V. Fizika Tverdogo Tela, Vol 10, No 9 (September 1968) pp 2814-2815 (In Russian,English translation in Soviet Physics-Solid State) (1330) Piezoelectric pressure transducer and process for its manufacture List, H., Zeiringer, R., Hatschek, R. US Patent 3,424,930 (28 January 1969) (Filed 15 June 1966) (1331) Second-harmonic generation of an elastic surface wave in n-quartz Lopen, P. 0 Journal of Applied Physics, Vol 39, No 12 (November 19681 pp 5400-5404 (1332) A verification of holographic measurement vibration Lurie, M., Zambutto, M. Applied Optics, Vol 7, No 11. (November 1968) pp 2323-2325 (1333)
of
Electromechanical resonator The Marconi Co Ltd (UK) Japanese Patent JPC 3535 ,69 (14 February 1969) (Converted 22 April 19661 (1334) Discal piezoelectric porcelain resonator Matsushita Denki kk Japanese Patent JPC 1495 ‘69 (23 January 1969) (Applied for 26 April 1965) (1335) Porcelain vibrator (utilizing thickness and thickness sliding mode) Matsushita Denki kk Japanese Patent JPC 6172:69 (15 March 1969) (Applied for 24 September 1964) (1336) Piezo-electric type electro-mechanical converting element (Barium titanate and piezoelectric porcelain bonded together and outputs taken in parallel) Matsushita Denki kk Japanese Patent JPC 6537:69 (20 March 1969) (Applied for 5 July 19651 (133’7) Nonlinear phenomena in excitation of magnetoelastic waves in yttrium garnet Mironov, S. A. et al Fizika Tverdogo Tela, Vol 11, No 1 (January 1969) (In Russian: English translation available in June 1969 as Soviet Physics-Solid State) p 217 (1338) Ultrasonic emitter Nederlands Organisatie voor Tregepast Natwerwilenschappelyk, Oneterzast ten behaeve van de Volksgezendheial French Patent 1,556,043 (31 January 1969) (Applied for 1 March 1968) Applied for in Holland 7 March 1967 (1339)
206
ULTRASONICS
July
1969
Square plate shaped piezo-electric resonator for electric filter utilising circumferential vibration Nippon Tokushu Togyo kk Japanese Patent JPC 28211/68 (4 December 1968) (Applied for 18 September 1963) The edges of a square plate-shaped piezoelectric resonator are partially notched thereby substantially increasing its circumference, and decreasing a resonance frequency of circumferential vibration. (1316) The grain dependence of the electromechanical properties in lead zirconate-titanate ceramics Webster, A. H., Weston, T. B. Journal of the Canadian Ceramic Society, Vol 37 (1968) pp XLI-XLV A series of specimen discs fabricated from co-precipitated hydroxides and sintered at different times was examined before and after poling as to dielectric and mechanical losses. Grain sizes were determined by averaging along various intercepts on the discs. Graphs showing the variation of dielectric constant, dissipation factor, radial coupling factor, permanent polarization and mechanical quality factor versus grain size are given; the most notable result being the independence of coercive field and grain size-a result contradicted by other workers in the field. (131’71 Variations in properties with composition in lead zircon&e-titan&e ceramics Weston. T. B.. Webster, A. H.,McNamara,V. M Journal of the Canadian Ceramic Society Vol 36, (1967) pp xv-xx The paper reinvestigates the composition of zirconate-titanates at the maxima of their dielectric constant and electromechanical coupling factor. The samples used were prepared by cold pressing and entering from co-precipitated powders (using thirteen different compositions), measurements were made both before and after poling and also at various temperatures. variation in PDO content was also considered. Results are given, together with a simultaneous check on physical and chemical properties (grain size. sintered density, etc). in graphic form. A hitherto unknown inhomogenity at a composition with 0. 529 mole fraction zirconate is pointed out. (1318) Contactless excitation of ultrasound in mol ten metals Arkin,M. Ya., et al Soviet Physics-Acoustics, Vol 14. NO 3 (January-March 1969) pp 290-295 (1319) Acoustic wave producing device (Underwater high power pulse emitter) Balashkand, M. I., et al US Patent 3,416,621 (17 December 19681 (Filed 6 March 19671 (1320) Variable size ultrasonic beam producing transducer Beaujard, L., Mandart. J. US Patent 3, 416, 366 (1’7 December 1968) (Filed 17 August 1965) (1321) Ultra-fast holography Buges J. C., et al Bulletin dInformations Scientifiques et Techniques, No 130 (October 1968) p 53 (In French: English abstracts) (13221 Transducers and switches Dunachie, G. R. Electronic Components, Vol 10, No 2 (February 1969) p 173 (1323) Acoustic holography: a progress report El- Sum, H. Laser Focus, Vol 5, No 3 (February 1969) p 40 (1324) Device for the transformation of electrical impulses into sound waves Espro GmbH and Co French Patent 1,554,618 (24 January 1969) (Applied for 7 April 1967) (13251
Ultrasonic visualization system employing new scanning and presentation methods (Employing an on-line digital computer) Fry,W.J.,et al Journal of the Acoustical Society of America, Vol 44, No 5 (November 19681 pp 1324-1338 (13261 Vibrating transducer for flow and other related measurements Jacobs, R. B. USA Patent 3.426,593 (11 February 1969) (Filed 23 December 1965) (1327) Ultrasonic field stimulated in a rod by a piston source Kasatkin , B A. Defectoscopy (English Translation), No 1 (January-February 19671 pp 23-27 (1328) Growth and study of thin ZnO Films Kenigsberg, N. L., Chernets, A. N. Fizika Tverdogo Tela, Vol 10, No 9 (September 1968) pp 2834-2836 (In Russian, English translation in Soviet Physics-Solid State) (1329) Excitation of Lamb waves in Cds single cry stals Kucherov, 1. Ya.,Ostroskii, 1. V. Fizika Tverdogo Tela, Vol 10, No 9 (September 1968) pp 2814-2815 (In Russian,English translation in Soviet Physics-Solid State) (1330) Piezoelectric pressure transducer and process for its manufacture List, H., Zeiringer, R., Hatschek, R. US Patent 3,424,930 (28 January 1969) (Filed 15 June 1966) (1331) Second-harmonic generation of an elastic surface wave in n-quartz Lopen, P. 0 Journal of Applied Physics, Vol 39, No 12 (November 19681 pp 5400-5404 (1332) A verification of holographic measurement vibration Lurie, M., Zambutto, M. Applied Optics, Vol 7, No 11. (November 1968) pp 2323-2325 (1333)
of
Electromechanical resonator The Marconi Co Ltd (UK) Japanese Patent JPC 3535 ,69 (14 February 1969) (Converted 22 April 19661 (1334) Discal piezoelectric porcelain resonator Matsushita Denki kk Japanese Patent JPC 1495 ‘69 (23 January 1969) (Applied for 26 April 1965) (1335) Porcelain vibrator (utilizing thickness and thickness sliding mode) Matsushita Denki kk Japanese Patent JPC 6172:69 (15 March 1969) (Applied for 24 September 1964) (1336) Piezo-electric type electro-mechanical converting element (Barium titanate and piezoelectric porcelain bonded together and outputs taken in parallel) Matsushita Denki kk Japanese Patent JPC 6537:69 (20 March 1969) (Applied for 5 July 19651 (133’7) Nonlinear phenomena in excitation of magnetoelastic waves in yttrium garnet Mironov, S. A. et al Fizika Tverdogo Tela, Vol 11, No 1 (January 1969) (In Russian: English translation available in June 1969 as Soviet Physics-Solid State) p 217 (1338) Ultrasonic emitter Nederlands Organisatie voor Tregepast Natwerwilenschappelyk, Oneterzast ten behaeve van de Volksgezendheial French Patent 1,556,043 (31 January 1969) (Applied for 1 March 1968) Applied for in Holland 7 March 1967 (1339)