FR775884A - Audible warning device operating by vacuum - Google Patents

Audible warning device operating by vacuum

Info

Publication number
FR775884A
FR775884A FR775884DA FR775884A FR 775884 A FR775884 A FR 775884A FR 775884D A FR775884D A FR 775884DA FR 775884 A FR775884 A FR 775884A
Authority
FR
France
Prior art keywords
vacuum
warning device
device operating
audible warning
audible
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 FR775884A publication Critical patent/FR775884A/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)
FR775884D 1933-10-04 1933-10-04 Audible warning device operating by vacuum Expired FR775884A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR775884T 1933-10-04

Publications (1)

Publication Number Publication Date
FR775884A true FR775884A (en) 1935-01-11

Family

ID=9200709

Family Applications (1)

Application Number Title Priority Date Filing Date
FR775884D Expired FR775884A (en) 1933-10-04 1933-10-04 Audible warning device operating by vacuum

Country Status (1)

Country Link
FR (1) FR775884A (en)

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