FR597251A - Warning device - Google Patents

Warning device

Info

Publication number
FR597251A
FR597251A FR597251DA FR597251A FR 597251 A FR597251 A FR 597251A FR 597251D A FR597251D A FR 597251DA FR 597251 A FR597251 A FR 597251A
Authority
FR
France
Prior art keywords
warning device
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
French (fr)
Inventor
Theodore Johnson Scofield
Lloyd Elmer Johnson
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 FR597251A publication Critical patent/FR597251A/en
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)
FR597251D 1925-04-27 1925-04-27 Warning device Expired FR597251A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR597251T 1925-04-27

Publications (1)

Publication Number Publication Date
FR597251A true FR597251A (en) 1925-11-17

Family

ID=8968154

Family Applications (1)

Application Number Title Priority Date Filing Date
FR597251D Expired FR597251A (en) 1925-04-27 1925-04-27 Warning device

Country Status (1)

Country Link
FR (1) FR597251A (en)

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