FR508989A - Avertisseur - Google Patents

Avertisseur

Info

Publication number
FR508989A
FR508989A FR508989A FR508989DA FR508989A FR 508989 A FR508989 A FR 508989A FR 508989 A FR508989 A FR 508989A FR 508989D A FR508989D A FR 508989DA FR 508989 A FR508989 A FR 508989A
Authority
FR
France
Prior art keywords
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
FR508989A
Other languages
English (en)
Inventor
Albert Legrand
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR508989A publication Critical patent/FR508989A/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
    • G10K9/10—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by mechanical means only

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR508989A 1919-03-13 1919-03-13 Avertisseur Expired FR508989A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR508989T 1919-03-13

Publications (1)

Publication Number Publication Date
FR508989A true FR508989A (fr) 1920-10-28

Family

ID=8910743

Family Applications (1)

Application Number Title Priority Date Filing Date
FR508989A Expired FR508989A (fr) 1919-03-13 1919-03-13 Avertisseur

Country Status (1)

Country Link
FR (1) FR508989A (fr)

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