Wave transmission lines and networks – Coupling networks – With impedance matching
Patent
1975-01-29
1976-07-06
Smith, Alfred E.
Wave transmission lines and networks
Coupling networks
With impedance matching
310 8, 310 87, H03H 904, H03H 910, H03H 914, H01L 4110
Patent
active
039684598
ABSTRACT:
An ultrasonic driver transducer employs a piezoelectric element excited by pulsed carrier signals and generates a propagating ultrasonic wave focused in acoustically matched relation by a metal plano-concave lens through a liquid medium for collimated flow into a metal coupler output element and then into the external specimen or element that is to be excited by ultrasonic energy. Means are provided for filling internal cavities of the instrument with a liquid medium for propagating only the desired waves, along with means for purging entrapped gas from that interior medium.
REFERENCES:
patent: 2283285 (1942-05-01), Pohlman
patent: 2407294 (1946-09-01), Shockley et al.
patent: 2503831 (1950-04-01), Mason
patent: 3175106 (1965-03-01), Sansom et al.
patent: 3278771 (1966-10-01), Fry
patent: 3497728 (1970-02-01), Ostrofsky et al.
patent: 3687219 (1972-08-01), Langlois
Nussbaum Marvin
Smith Alfred E.
Sperry Rand Corporation
Terry Howard P.
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