FR760977A - Improvements to vacuum sound devices - Google Patents

Improvements to vacuum sound devices

Info

Publication number
FR760977A
FR760977A FR760977DA FR760977A FR 760977 A FR760977 A FR 760977A FR 760977D A FR760977D A FR 760977DA FR 760977 A FR760977 A FR 760977A
Authority
FR
France
Prior art keywords
sound devices
vacuum sound
vacuum
devices
sound
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
Antoine Rouvier
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 FR760977A publication Critical patent/FR760977A/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)
FR760977D 1933-09-20 1933-09-20 Improvements to vacuum sound devices Expired FR760977A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR760977T 1933-09-20

Publications (1)

Publication Number Publication Date
FR760977A true FR760977A (en) 1934-03-07

Family

ID=9171365

Family Applications (1)

Application Number Title Priority Date Filing Date
FR760977D Expired FR760977A (en) 1933-09-20 1933-09-20 Improvements to vacuum sound devices

Country Status (1)

Country Link
FR (1) FR760977A (en)

Similar Documents

Publication Publication Date Title
FR776330A (en) Improvements to vacuum cleaning devices
FR836335A (en) Improvements to refrigeration devices
FR765446A (en) Improvements to vacuum devices
FR760977A (en) Improvements to vacuum sound devices
FR835906A (en) Improvements to drawing devices
FR785873A (en) Improvements to tapping devices
FR749017A (en) Improvements to electric resonance devices
FR754784A (en) Improvements to refrigeration devices
FR729878A (en) Improvements to hearing devices
FR774012A (en) Improvements to hemming devices
FR747434A (en) Improvements to drawing devices
FR823417A (en) Loudspeaker enhancements
FR760961A (en) Improvements to hearing devices
FR822765A (en) Improvements to stereographometers
FR806613A (en) Improvements to recording devices
FR763007A (en) Improvements to barrel rinsing devices
FR47982E (en) Improvements to hemming devices
FR782890A (en) Improvements to cinematographic devices
FR47767E (en) Improvements to mechanical plastering devices
FR768887A (en) Improvements to vibrating devices
FR833048A (en) Improvements to calculating devices
FR770663A (en) Improvements to cinematographic devices
FR46313E (en) Improvements to vacuum devices
FR809184A (en) Improvements to drawing devices
FR830884A (en) Improvements to cinematographic devices