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PIERRE LE GOAZIOU
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PIERRE LE GOAZIOU
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Publication of FR22505EpublicationCriticalpatent/FR22505E/fr
G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
FR22505A1918-12-071918-12-07Appareils pour découvrir l'approche et repérer la direction d'une source sonore sous-marine ou aérienne
ExpiredFR22505E
(fr)
Perfectionnement aux procédés pour déterminer la direction d'un émetteur d'ondesélectro magnétiques ou d'un obstacle réfléchissant de telles ondes
Appareil pour la transmission et la reproduction d'ondes acoustiques, pour la phonocinématographie, le photogramophone et des applications analogues
Armature pour appareil électro-magnétique, spécialement pour appareil électro-acoustique, destiné par exemple à l'enregistrement ou à la reproduction de pistes sonores