FR746557A - Avertisseur électrique - Google Patents

Avertisseur électrique

Info

Publication number
FR746557A
FR746557A FR746557DA FR746557A FR 746557 A FR746557 A FR 746557A FR 746557D A FR746557D A FR 746557DA FR 746557 A FR746557 A FR 746557A
Authority
FR
France
Prior art keywords
electric horn
horn
electric
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
Emil Volkers
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 FR746557A publication Critical patent/FR746557A/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
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR746557D 1932-07-01 1932-11-29 Avertisseur électrique Expired FR746557A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE746557X 1932-07-01

Publications (1)

Publication Number Publication Date
FR746557A true FR746557A (fr) 1933-06-01

Family

ID=6648412

Family Applications (1)

Application Number Title Priority Date Filing Date
FR746557D Expired FR746557A (fr) 1932-07-01 1932-11-29 Avertisseur électrique

Country Status (1)

Country Link
FR (1) FR746557A (fr)

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