FR808749A - Perfectionnement aux avertisseurs électro-magnétiques - Google Patents

Perfectionnement aux avertisseurs électro-magnétiques

Info

Publication number
FR808749A
FR808749A FR808749DA FR808749A FR 808749 A FR808749 A FR 808749A FR 808749D A FR808749D A FR 808749DA FR 808749 A FR808749 A FR 808749A
Authority
FR
France
Prior art keywords
alarms
electromagnetic
improvement
electromagnetic alarms
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.)
N O R SA
Original Assignee
N O R SA
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 N O R SA filed Critical N O R SA
Application granted granted Critical
Publication of FR808749A publication Critical patent/FR808749A/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
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR808749D 1935-10-31 1935-10-31 Perfectionnement aux avertisseurs électro-magnétiques Expired FR808749A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR808749T 1935-10-31

Publications (1)

Publication Number Publication Date
FR808749A true FR808749A (fr) 1937-02-13

Family

ID=9253112

Family Applications (1)

Application Number Title Priority Date Filing Date
FR808749D Expired FR808749A (fr) 1935-10-31 1935-10-31 Perfectionnement aux avertisseurs électro-magnétiques

Country Status (1)

Country Link
FR (1) FR808749A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418510A1 (fr) * 1978-02-22 1979-09-21 Fiamm Spa Avertisseur sonore pneumatique avec cornet fixe au boitier au moyen d'un manchon de matiere plastique ou analogue

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418510A1 (fr) * 1978-02-22 1979-09-21 Fiamm Spa Avertisseur sonore pneumatique avec cornet fixe au boitier au moyen d'un manchon de matiere plastique ou analogue

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