FR774990A - Avertisseur sonore - Google Patents

Avertisseur sonore

Info

Publication number
FR774990A
FR774990A FR774990DA FR774990A FR 774990 A FR774990 A FR 774990A FR 774990D A FR774990D A FR 774990DA FR 774990 A FR774990 A FR 774990A
Authority
FR
France
Prior art keywords
buzzer
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)
Inventor
Andre Joseph Ju Delagebeaudeuf
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 filed Critical
Application granted granted Critical
Publication of FR774990A publication Critical patent/FR774990A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/02—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR774990D 1934-05-04 1934-05-04 Avertisseur sonore Expired FR774990A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR774990T 1934-05-04

Publications (1)

Publication Number Publication Date
FR774990A true FR774990A (fr) 1934-12-17

Family

ID=9200195

Family Applications (1)

Application Number Title Priority Date Filing Date
FR774990D Expired FR774990A (fr) 1934-05-04 1934-05-04 Avertisseur sonore

Country Status (1)

Country Link
FR (1) FR774990A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2848415A1 (de) * 1978-02-22 1979-08-23 Fiamm Spa Signalhorn fuer einen pneumatischen akustischen signalgeber
WO1987004953A1 (fr) * 1985-01-16 1987-08-27 Kockum Sonics Ab Appareil destine a produire specialement des sons a basse frequence

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2848415A1 (de) * 1978-02-22 1979-08-23 Fiamm Spa Signalhorn fuer einen pneumatischen akustischen signalgeber
WO1987004953A1 (fr) * 1985-01-16 1987-08-27 Kockum Sonics Ab Appareil destine a produire specialement des sons a basse frequence

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