FR794321A - Audible vacuum warning device - Google Patents

Audible vacuum warning device

Info

Publication number
FR794321A
FR794321A FR794321DA FR794321A FR 794321 A FR794321 A FR 794321A FR 794321D A FR794321D A FR 794321DA FR 794321 A FR794321 A FR 794321A
Authority
FR
France
Prior art keywords
audible
warning device
vacuum warning
vacuum
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
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 FR794321A publication Critical patent/FR794321A/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
    • G10K9/02—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR794321D 1934-11-21 1934-11-21 Audible vacuum warning device Expired FR794321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR794321T 1934-11-21

Publications (1)

Publication Number Publication Date
FR794321A true FR794321A (en) 1936-02-13

Family

ID=9234014

Family Applications (1)

Application Number Title Priority Date Filing Date
FR794321D Expired FR794321A (en) 1934-11-21 1934-11-21 Audible vacuum warning device

Country Status (1)

Country Link
FR (1) FR794321A (en)

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