FR794798A - Perfectionnements aux avertisseurs électro-magnétiques dits ? haute fréquence - Google Patents

Perfectionnements aux avertisseurs électro-magnétiques dits ? haute fréquence

Info

Publication number
FR794798A
FR794798A FR794798DA FR794798A FR 794798 A FR794798 A FR 794798A FR 794798D A FR794798D A FR 794798DA FR 794798 A FR794798 A FR 794798A
Authority
FR
France
Prior art keywords
alarms
high frequency
called electromagnetic
electromagnetic
called
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.)
SANOR
Original Assignee
SANOR
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 SANOR filed Critical SANOR
Application granted granted Critical
Publication of FR794798A publication Critical patent/FR794798A/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)
FR794798D 1934-11-22 1934-11-22 Perfectionnements aux avertisseurs électro-magnétiques dits ? haute fréquence Expired FR794798A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR794798T 1934-11-22

Publications (1)

Publication Number Publication Date
FR794798A true FR794798A (fr) 1936-02-25

Family

ID=9234255

Family Applications (1)

Application Number Title Priority Date Filing Date
FR794798D Expired FR794798A (fr) 1934-11-22 1934-11-22 Perfectionnements aux avertisseurs électro-magnétiques dits ? haute fréquence

Country Status (1)

Country Link
FR (1) FR794798A (fr)

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