FR697941A - Perfectionnement aux appareils de repérage par le son - Google Patents

Perfectionnement aux appareils de repérage par le son

Info

Publication number
FR697941A
FR697941A FR697941DA FR697941A FR 697941 A FR697941 A FR 697941A FR 697941D A FR697941D A FR 697941DA FR 697941 A FR697941 A FR 697941A
Authority
FR
France
Prior art keywords
improvement
tracking devices
sound tracking
sound
devices
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
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.)
Anciens Etablissements Sautter Harle
Original Assignee
Anciens Etablissements Sautter Harle
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 Anciens Etablissements Sautter Harle filed Critical Anciens Etablissements Sautter Harle
Application granted granted Critical
Publication of FR697941A publication Critical patent/FR697941A/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)
FR697941D 1929-09-25 1929-09-25 Perfectionnement aux appareils de repérage par le son Expired FR697941A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR697941T 1929-09-25

Publications (1)

Publication Number Publication Date
FR697941A true FR697941A (fr) 1931-01-23

Family

ID=9047396

Family Applications (1)

Application Number Title Priority Date Filing Date
FR697941D Expired FR697941A (fr) 1929-09-25 1929-09-25 Perfectionnement aux appareils de repérage par le son

Country Status (1)

Country Link
FR (1) FR697941A (fr)

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