Ultrasonic transducer

Details Ultrasonic transducer Ultrasonic transducer

1983-08-02

1986-04-08

Blum, Theodore M.

Communications, electrical: acoustic wave systems and devices

Signal transducers

367173, H04R 0000

Patent

active

045816859

ABSTRACT:
An ultrasonic transducer having an ultrasonic vibrator for transmitting and receiving ultrasonic waves, and a reflecting plate for imparting directivity to the ultrasonic waves transmitted by the ultrasonic vibrator and for converging the received ultrasonic waves. In the reflecting plate, at least one through hole is formed for passing snow and mud blown upon the reflecting plate by the wind. Each through hole is configured so as not to deteriorate substantially the reflective capacity of the plate.

REFERENCES:
patent: 1827955 (1931-10-01), Rodriguez
patent: 2459162 (1949-01-01), Hayes
patent: 3028752 (1962-04-01), Bacon
patent: 3046644 (1962-07-01), Auer, Jr. et al.
patent: 3109155 (1963-10-01), Degen
patent: 4104610 (1978-08-01), Inoue et al.
patent: 4348750 (1982-09-01), Schwind
patent: 4433398 (1984-02-01), Kodera et al.

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