FR516135A - Perfectionnements aux détecteurs de sons - Google Patents

Perfectionnements aux détecteurs de sons

Info

Publication number
FR516135A
FR516135A FR516135A FR516135DA FR516135A FR 516135 A FR516135 A FR 516135A FR 516135 A FR516135 A FR 516135A FR 516135D A FR516135D A FR 516135DA FR 516135 A FR516135 A FR 516135A
Authority
FR
France
Prior art keywords
sound detectors
detectors
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
FR516135A
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.)
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 FR516135A publication Critical patent/FR516135A/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)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
FR516135A 1919-06-06 1920-05-29 Perfectionnements aux détecteurs de sons Expired FR516135A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US302247A US1594069A (en) 1919-06-06 1919-06-06 Sound-detecting device

Publications (1)

Publication Number Publication Date
FR516135A true FR516135A (fr) 1921-04-14

Family

ID=23166925

Family Applications (1)

Application Number Title Priority Date Filing Date
FR516135A Expired FR516135A (fr) 1919-06-06 1920-05-29 Perfectionnements aux détecteurs de sons

Country Status (2)

Country Link
US (1) US1594069A (fr)
FR (1) FR516135A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423591A (en) * 1939-09-16 1947-07-08 John W Flude Apparatus for making geophysical surveys under water
US2520938A (en) * 1944-10-07 1950-09-05 Klein Elias Tourmaline crystal transducer
US2477246A (en) * 1945-05-16 1949-07-26 Bell Telephone Labor Inc Submarine signaling device

Also Published As

Publication number Publication date
US1594069A (en) 1926-07-27

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