FR43729E - Improvements to audible warning devices - Google Patents

Improvements to audible warning devices

Info

Publication number
FR43729E
FR43729E FR43729DA FR43729E FR 43729 E FR43729 E FR 43729E FR 43729D A FR43729D A FR 43729DA FR 43729 E FR43729 E FR 43729E
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
French (fr)
Inventor
Marguerite Marie-L Gentilhomme
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 FR43729E publication Critical patent/FR43729E/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)
FR43729D 1932-12-17 1932-12-17 Improvements to audible warning devices Expired FR43729E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR43729T 1932-12-17

Publications (1)

Publication Number Publication Date
FR43729E true FR43729E (en) 1934-08-09

Family

ID=8679666

Family Applications (1)

Application Number Title Priority Date Filing Date
FR43729D Expired FR43729E (en) 1932-12-17 1932-12-17 Improvements to audible warning devices

Country Status (1)

Country Link
FR (1) FR43729E (en)

Similar Documents

Publication Publication Date Title
FR751946A (en) Improvements relating to tires
FR753812A (en) Improvements to calibration devices
FR747934A (en) Improvements to crystallizers
FR740081A (en) Improvements to crushers
FR752676A (en) Improvements to davits
FR740160A (en) Improvements to acoustic warning devices
FR809083A (en) Improvements to audible warning devices
FR43729E (en) Improvements to audible warning devices
FR738369A (en) Improvements to audible warning devices
FR760417A (en) Improvements to audible warning devices
FR731182A (en) Improvements to crushers
FR784769A (en) Improvements to audible warning devices
FR762248A (en) Improvements to audible warning devices
FR724742A (en) Improvements to audible warning devices
FR44582E (en) Improvements to audible warning devices
FR816552A (en) Improvements to audible warning devices
FR807916A (en) Improvements to audible warning devices
FR822415A (en) Improvements to audible warning devices
FR752669A (en) Improvements to telecinematography transmitters
FR752391A (en) Improvements to manometers
FR763199A (en) Improvements to railways
FR42187E (en) Improvements made to cremones
FR760046A (en) Removable motorcycle
FR740508A (en) Rim improvement
FR762865A (en) Improvements to refrigeration devices