FR704486A - Improvements to acoustic emission devices - Google Patents

Improvements to acoustic emission devices

Info

Publication number
FR704486A
FR704486A FR704486DA FR704486A FR 704486 A FR704486 A FR 704486A FR 704486D A FR704486D A FR 704486DA FR 704486 A FR704486 A FR 704486A
Authority
FR
France
Prior art keywords
acoustic emission
emission devices
devices
acoustic
emission
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.)
J CARPENTIER ATEL
Original Assignee
J CARPENTIER ATEL
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 J CARPENTIER ATEL filed Critical J CARPENTIER ATEL
Application granted granted Critical
Publication of FR704486A publication Critical patent/FR704486A/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)
FR704486D 1930-01-13 1930-01-13 Improvements to acoustic emission devices Expired FR704486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR704486T 1930-01-13

Publications (1)

Publication Number Publication Date
FR704486A true FR704486A (en) 1931-05-20

Family

ID=9065682

Family Applications (1)

Application Number Title Priority Date Filing Date
FR704486D Expired FR704486A (en) 1930-01-13 1930-01-13 Improvements to acoustic emission devices

Country Status (1)

Country Link
FR (1) FR704486A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451797A (en) * 1945-02-17 1948-10-19 Schlumberger Well Surv Corp Apparatus for producing pressure pulses in boreholes
US3033157A (en) * 1955-10-20 1962-05-08 Harold E Sawyer Apparatus for producing sound waves

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451797A (en) * 1945-02-17 1948-10-19 Schlumberger Well Surv Corp Apparatus for producing pressure pulses in boreholes
US3033157A (en) * 1955-10-20 1962-05-08 Harold E Sawyer Apparatus for producing sound waves

Similar Documents

Publication Publication Date Title
FR715101A (en) Improvements to ventilation devices
FR704486A (en) Improvements to acoustic emission devices
FR711055A (en) Improvements to the speakers
FR692261A (en) Carburetor improvements
FR716710A (en) Improvements to levels
FR716534A (en) Improvements to acoustic devices
FR713869A (en) Carburetor improvements
FR715428A (en) Carburetor improvements
FR708817A (en) Improvements to sound equipment
FR717498A (en) Improvements made to devices generating oscillations
FR715222A (en) Improvements to acoustic diaphragms
FR702755A (en) Matchbook refinements
FR711828A (en) Improvements to incineration equipment
FR691560A (en) Improvements to sound reproducers
FR38034E (en) Improvements made to carburetors
CA305844A (en) Sound deadening construction
FR692380A (en) Improvements to telephone devices
FR38691E (en) Carburetor improvements
FR713870A (en) Carburetor improvements
FR703904A (en) Carburetor improvements
FR720663A (en) Carburetor improvements
FR690488A (en) Carburetor improvements
FR724332A (en) Carburetor improvements
FR726042A (en) Carburetor improvements
FR699559A (en) Carburetor improvements