FR772109A - Appareil roulant d'écoute ou de repérage au son - Google Patents

Appareil roulant d'écoute ou de repérage au son

Info

Publication number
FR772109A
FR772109A FR772109DA FR772109A FR 772109 A FR772109 A FR 772109A FR 772109D A FR772109D A FR 772109DA FR 772109 A FR772109 A FR 772109A
Authority
FR
France
Prior art keywords
listening
rolling device
tracking sound
tracking
sound
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.)
TECHNICKY PRUMYSL AKCIOVA SPOL
Original Assignee
TECHNICKY PRUMYSL AKCIOVA SPOL
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 TECHNICKY PRUMYSL AKCIOVA SPOL filed Critical TECHNICKY PRUMYSL AKCIOVA SPOL
Application granted granted Critical
Publication of FR772109A publication Critical patent/FR772109A/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)
FR772109D 1933-04-20 1934-04-20 Appareil roulant d'écoute ou de repérage au son Expired FR772109A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS772109X 1933-04-20

Publications (1)

Publication Number Publication Date
FR772109A true FR772109A (fr) 1934-10-23

Family

ID=5455440

Family Applications (1)

Application Number Title Priority Date Filing Date
FR772109D Expired FR772109A (fr) 1933-04-20 1934-04-20 Appareil roulant d'écoute ou de repérage au son

Country Status (1)

Country Link
FR (1) FR772109A (fr)

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