FR816552A - Perfectionnements aux avertisseurs sonores - Google Patents

Perfectionnements aux avertisseurs sonores

Info

Publication number
FR816552A
FR816552A FR816552DA FR816552A FR 816552 A FR816552 A FR 816552A FR 816552D A FR816552D A FR 816552DA FR 816552 A FR816552 A FR 816552A
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)
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.)
SONABEL
Original Assignee
SONABEL
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 SONABEL filed Critical SONABEL
Application granted granted Critical
Publication of FR816552A publication Critical patent/FR816552A/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)
FR816552D 1936-11-23 1936-11-23 Perfectionnements aux avertisseurs sonores Expired FR816552A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR816552T 1936-11-23

Publications (1)

Publication Number Publication Date
FR816552A true FR816552A (fr) 1937-08-11

Family

ID=9267852

Family Applications (1)

Application Number Title Priority Date Filing Date
FR816552D Expired FR816552A (fr) 1936-11-23 1936-11-23 Perfectionnements aux avertisseurs sonores

Country Status (1)

Country Link
FR (1) FR816552A (fr)

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