FR518387A - Improved method and apparatus for underwater signals - Google Patents

Improved method and apparatus for underwater signals

Info

Publication number
FR518387A
FR518387A FR518387A FR518387DA FR518387A FR 518387 A FR518387 A FR 518387A FR 518387 A FR518387 A FR 518387A FR 518387D A FR518387D A FR 518387DA FR 518387 A FR518387 A FR 518387A
Authority
FR
France
Prior art keywords
improved method
underwater signals
underwater
signals
improved
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
FR518387A
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.)
Submarine Signal Co
Original Assignee
Submarine Signal Co
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 Submarine Signal Co filed Critical Submarine Signal Co
Application granted granted Critical
Publication of FR518387A publication Critical patent/FR518387A/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)
  • Transducers For Ultrasonic Waves (AREA)
  • Prostheses (AREA)
FR518387A 1918-11-29 1920-06-30 Improved method and apparatus for underwater signals Expired FR518387A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US264607A US1348827A (en) 1918-11-29 1918-11-29 Method and apparatus for submarine signaling

Publications (1)

Publication Number Publication Date
FR518387A true FR518387A (en) 1921-05-24

Family

ID=23006820

Family Applications (1)

Application Number Title Priority Date Filing Date
FR518387A Expired FR518387A (en) 1918-11-29 1920-06-30 Improved method and apparatus for underwater signals

Country Status (3)

Country Link
US (1) US1348827A (en)
FR (1) FR518387A (en)
GB (1) GB146152A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69325397T2 (en) * 1992-11-13 1999-10-14 Sumitomo Rubber Industries tire

Also Published As

Publication number Publication date
US1348827A (en) 1920-08-03
GB146152A (en) 1920-12-23

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