FR832479A - Avertisseur acoustique - Google Patents
Avertisseur acoustiqueInfo
- Publication number
- FR832479A FR832479A FR832479DA FR832479A FR 832479 A FR832479 A FR 832479A FR 832479D A FR832479D A FR 832479DA FR 832479 A FR832479 A FR 832479A
- Authority
- FR
- France
- Prior art keywords
- warning device
- acoustic warning
- acoustic
- 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
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
- G10K9/15—Self-interrupting arrangements
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C21/00—Producing acoustic time signals by electrical means
- G04C21/02—Constructional details
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR832479T | 1937-05-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR832479A true FR832479A (fr) | 1938-09-28 |
Family
ID=9296024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR832479D Expired FR832479A (fr) | 1937-05-10 | 1937-05-10 | Avertisseur acoustique |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR832479A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113050401A (zh) * | 2019-12-11 | 2021-06-29 | 斯沃奇集团研究和开发有限公司 | 用于表壳中的声辐射膜的保持和振动传递装置 |
-
1937
- 1937-05-10 FR FR832479D patent/FR832479A/fr not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113050401A (zh) * | 2019-12-11 | 2021-06-29 | 斯沃奇集团研究和开发有限公司 | 用于表壳中的声辐射膜的保持和振动传递装置 |
CN113050401B (zh) * | 2019-12-11 | 2023-01-13 | 斯沃奇集团研究和开发有限公司 | 用于表壳中的声辐射膜的保持和振动传递装置 |
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