FR691981A - Improvements to acoustic warning devices for vehicles - Google Patents
Improvements to acoustic warning devices for vehiclesInfo
- Publication number
- FR691981A FR691981A FR691981DA FR691981A FR 691981 A FR691981 A FR 691981A FR 691981D A FR691981D A FR 691981DA FR 691981 A FR691981 A FR 691981A
- Authority
- FR
- France
- Prior art keywords
- vehicles
- warning devices
- acoustic warning
- acoustic
- devices
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US691981XA | 1929-03-18 | 1929-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR691981A true FR691981A (en) | 1930-10-29 |
Family
ID=22087365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR691981D Expired FR691981A (en) | 1929-03-18 | 1930-03-15 | Improvements to acoustic warning devices for vehicles |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR691981A (en) |
-
1930
- 1930-03-15 FR FR691981D patent/FR691981A/en not_active Expired
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