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Una bocina claxon de juguete, caracterizada esencialmente por estar constituida por un juego de dos tubos sonoros acoplados sobre una placa circular, en la que se hallen orificios adecuados a sus conductos, cuyos orificios constan de respectivas válvulas obturadoras, solicitadas por sendos resortes que las mantienen en separación respecto de su asiento interior del tubo.
ES0021025U1949-10-051949-10-05Bocina-claxon de juguete.
ExpiredES21025Y
(es)
Un dispositivo para determinar el ajuste de aparatos, especialmente de proyectores, a fuentes invisibles de sonido como aviones sirviendo de ángulo de elevación y altura de dichos sonidos determinados acústicamente.