FR738369A - Perfectionnements aux avertisseurs sonores - Google Patents

Perfectionnements aux avertisseurs sonores

Info

Publication number
FR738369A
FR738369A FR738369DA FR738369A FR 738369 A FR738369 A FR 738369A FR 738369D A FR738369D A FR 738369DA FR 738369 A FR738369 A FR 738369A
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.)
EA Laboratories Inc
Original Assignee
EA Laboratories Inc
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 EA Laboratories Inc filed Critical EA Laboratories Inc
Application granted granted Critical
Publication of FR738369A publication Critical patent/FR738369A/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)
FR738369D 1932-06-09 1932-06-09 Perfectionnements aux avertisseurs sonores Expired FR738369A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR738369T 1932-06-09

Publications (1)

Publication Number Publication Date
FR738369A true FR738369A (fr) 1932-12-24

Family

ID=9132226

Family Applications (1)

Application Number Title Priority Date Filing Date
FR738369D Expired FR738369A (fr) 1932-06-09 1932-06-09 Perfectionnements aux avertisseurs sonores

Country Status (1)

Country Link
FR (1) FR738369A (fr)

Similar Documents

Publication Publication Date Title
FR751946A (fr) Perfectionnements relatifs aux pneumatiques
FR753812A (fr) Perfectionnements aux dispositifs de calibrage
FR747934A (fr) Perfectionnements aux cristallisoirs
FR740081A (fr) Perfectionnements aux concasseurs
FR752676A (fr) Perfectionnements aux daviers
FR740160A (fr) Perfectionnements aux avertisseurs acoustiques
FR809083A (fr) Perfectionnements aux avertisseurs sonores
FR738369A (fr) Perfectionnements aux avertisseurs sonores
FR760417A (fr) Perfectionnements aux avertisseurs sonores
FR43729E (fr) Perfectionnements aux avertisseurs sonores
FR731182A (fr) Perfectionnements aux concasseurs
FR784769A (fr) Perfectionnements aux avertisseurs sonores
FR762248A (fr) Perfectionnements aux avertisseurs sonores
FR724742A (fr) Perfectionnements aux avertisseurs sonores
FR44582E (fr) Perfectionnements aux avertisseurs sonores
FR822415A (fr) Perfectionnements aux avertisseurs sonores
FR816552A (fr) Perfectionnements aux avertisseurs sonores
FR807916A (fr) Perfectionnements aux avertisseurs sonores
FR752669A (fr) Perfectionnements aux émetteurs de télécinématographie
FR752391A (fr) Perfectionnements apportés aux manomètres
FR763199A (fr) Perfectionnements aux voies ferrées
FR42187E (fr) Perfectionnements apportés aux crémones
FR760046A (fr) Motocyclette démontable
FR740508A (fr) Perfectionnement aux jantes
FR762865A (fr) Perfectionnements aux dispositifs frigorifiques