FR568237A - Perfectionnements aux dispositifs de production de sons - Google Patents

Perfectionnements aux dispositifs de production de sons

Info

Publication number
FR568237A
FR568237A FR568237DA FR568237A FR 568237 A FR568237 A FR 568237A FR 568237D A FR568237D A FR 568237DA FR 568237 A FR568237 A FR 568237A
Authority
FR
France
Prior art keywords
sound production
production devices
devices
sound
production
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.)
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 FR568237A publication Critical patent/FR568237A/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)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR568237D 1923-06-21 1923-06-29 Perfectionnements aux dispositifs de production de sons Expired FR568237A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1617323A GB217056A (en) 1923-06-21 1923-06-21 Improvements in sound producing devices

Publications (1)

Publication Number Publication Date
FR568237A true FR568237A (fr) 1924-03-18

Family

ID=10072492

Family Applications (1)

Application Number Title Priority Date Filing Date
FR568237D Expired FR568237A (fr) 1923-06-21 1923-06-29 Perfectionnements aux dispositifs de production de sons

Country Status (3)

Country Link
DE (1) DE409835C (fr)
FR (1) FR568237A (fr)
GB (1) GB217056A (fr)

Also Published As

Publication number Publication date
DE409835C (de) 1925-02-12
GB217056A (en) 1924-06-12

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