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FR839085A - Improvements to underwater signaling devices - Google Patents

Improvements to underwater signaling devices

Info

Publication number
FR839085A
FR839085A FR839085DA FR839085A FR 839085 A FR839085 A FR 839085A FR 839085D A FR839085D A FR 839085DA FR 839085 A FR839085 A FR 839085A
Authority
FR
France
Prior art keywords
signaling devices
underwater signaling
underwater
devices
signaling
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
Other languages
French (fr)
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR839085A publication Critical patent/FR839085A/en
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)
FR839085D 1937-06-09 1938-06-09 Improvements to underwater signaling devices Expired FR839085A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US839085XA 1937-06-09 1937-06-09

Publications (1)

Publication Number Publication Date
FR839085A true FR839085A (en) 1939-03-23

Family

ID=22181431

Family Applications (1)

Application Number Title Priority Date Filing Date
FR839085D Expired FR839085A (en) 1937-06-09 1938-06-09 Improvements to underwater signaling devices

Country Status (1)

Country Link
FR (1) FR839085A (en)

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