FR724742A - Perfectionnements aux avertisseurs sonores - Google Patents

Perfectionnements aux avertisseurs sonores

Info

Publication number
FR724742A
FR724742A FR724742DA FR724742A FR 724742 A FR724742 A FR 724742A FR 724742D A FR724742D A FR 724742DA FR 724742 A FR724742 A FR 724742A
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
Rene-Jacques-Henri Planiol
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 FR724742A publication Critical patent/FR724742A/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
    • G10K9/15—Self-interrupting arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR724742D 1930-10-23 1931-10-17 Perfectionnements aux avertisseurs sonores Expired FR724742A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE724742X 1930-10-23

Publications (1)

Publication Number Publication Date
FR724742A true FR724742A (fr) 1932-05-02

Family

ID=6634716

Family Applications (1)

Application Number Title Priority Date Filing Date
FR724742D Expired FR724742A (fr) 1930-10-23 1931-10-17 Perfectionnements aux avertisseurs sonores

Country Status (1)

Country Link
FR (1) FR724742A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4134200A (en) * 1976-02-04 1979-01-16 Fiamm S.P.A. Fabbrica Italiana Accumulatori Motocarri Montecchio Method of making an electromagnetic sound generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4134200A (en) * 1976-02-04 1979-01-16 Fiamm S.P.A. Fabbrica Italiana Accumulatori Motocarri Montecchio Method of making an electromagnetic sound generator

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