FR784769A - Perfectionnements aux avertisseurs sonores - Google Patents

Perfectionnements aux avertisseurs sonores

Info

Publication number
FR784769A
FR784769A FR784769DA FR784769A FR 784769 A FR784769 A FR 784769A FR 784769D A FR784769D A FR 784769DA FR 784769 A FR784769 A FR 784769A
Authority
FR
France
Prior art keywords
audible warning
warning devices
audible
devices
warning
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
Pierre Gauthier
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 FR784769A publication Critical patent/FR784769A/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)
FR784769D 1934-04-18 1934-04-18 Perfectionnements aux avertisseurs sonores Expired FR784769A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR784769T 1934-04-18

Publications (1)

Publication Number Publication Date
FR784769A true FR784769A (fr) 1935-07-24

Family

ID=9217482

Family Applications (1)

Application Number Title Priority Date Filing Date
FR784769D Expired FR784769A (fr) 1934-04-18 1934-04-18 Perfectionnements aux avertisseurs sonores

Country Status (1)

Country Link
FR (1) FR784769A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9202120U1 (de) * 1992-02-19 1992-04-16 Guilliard, Bernd Blasinstrument mit veränderbarer Tonhöhe und Lautstärke

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9202120U1 (de) * 1992-02-19 1992-04-16 Guilliard, Bernd Blasinstrument mit veränderbarer Tonhöhe und Lautstärke

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