FR471373A - Perfectionnements aux appareils à signaux s'entendant sous l'eau - Google Patents

Perfectionnements aux appareils à signaux s'entendant sous l'eau

Info

Publication number
FR471373A
FR471373A FR471373A FR471373DA FR471373A FR 471373 A FR471373 A FR 471373A FR 471373 A FR471373 A FR 471373A FR 471373D A FR471373D A FR 471373DA FR 471373 A FR471373 A FR 471373A
Authority
FR
France
Prior art keywords
signal devices
underwater
devices heard
heard underwater
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR471373A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Application granted granted Critical
Publication of FR471373A publication Critical patent/FR471373A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR471373A 1913-05-26 1914-04-25 Perfectionnements aux appareils à signaux s'entendant sous l'eau Expired FR471373A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191312266T 1913-05-26

Publications (1)

Publication Number Publication Date
FR471373A true FR471373A (fr) 1914-10-24

Family

ID=32371160

Family Applications (1)

Application Number Title Priority Date Filing Date
FR471373A Expired FR471373A (fr) 1913-05-26 1914-04-25 Perfectionnements aux appareils à signaux s'entendant sous l'eau

Country Status (3)

Country Link
FR (1) FR471373A (fr)
GB (1) GB191312266A (fr)
NL (1) NL1745C (fr)

Also Published As

Publication number Publication date
GB191312266A (en) 1914-05-26
NL1745C (nl) 1916-12-15

Similar Documents

Publication Publication Date Title
FR471373A (fr) Perfectionnements aux appareils à signaux s'entendant sous l'eau
FR485021A (fr) Perfectionnements aux appareils d'hydrothérapie
FR456525A (fr) Perfectionnements aux appareils à signaux sous-marins
FR452784A (fr) Perfectionnements aux appareils de sauvetage
FR456615A (fr) Appareils à signaux sous-marins
FR417206A (fr) Appareil à signaux susceptibles d'etre entendus sous l'eau
FR474993A (fr) Perfectionnements aux signaux d'alarme électriques
FR447324A (fr) Perfectionnements aux appareils d'imprimerie
FR456431A (fr) Perfectionnements aux appareils employés pour diriger et propulser les bateaux
FR481678A (fr) Perfectionnements apportés aux appareils d'imprimerie
FR466465A (fr) Perfectionnements aux accessoires d'appareils cinématographiques
FR509470A (fr) Perfectionnements aux appareils d'alarme
FR457987A (fr) Appareil à chasse d'eau
FR460033A (fr) Perfectionnements aux signaux
FR458281A (fr) Perfectionnements aux compteurs à eau
FR459581A (fr) Perfectionnements aux cinématographes ou appareils analogues
FR451056A (fr) Perfectionnements aux appareils pour signaux
FR471534A (fr) Perfectionnements aux appareils d'aviation
FR455568A (fr) Perfectionnements aux gramophones ou appareils analogues
FR458355A (fr) Appareil à mesurer l'eau
FR462550A (fr) Perfectionnement apporté aux signaux électriques d'alarme
FR454004A (fr) Perfectionnements aux projecteurs de lumière sous-marins ou appareils similaires soumis à une forte pression d'eau
FR429828A (fr) Perfectionnements aux appareils de sauvetage des bateaux
FR435892A (fr) Signal auditif sous-marin
FR466706A (fr) Perfectionnements aux signaux téléphoniques