FR612869A - Improvements to warning devices - Google Patents
Improvements to warning devicesInfo
- Publication number
- FR612869A FR612869A FR612869DA FR612869A FR 612869 A FR612869 A FR 612869A FR 612869D A FR612869D A FR 612869DA FR 612869 A FR612869 A FR 612869A
- Authority
- FR
- France
- Prior art keywords
- warning devices
- warning
- 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
-
- 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
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/20—Sounding members
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electromagnetism (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR612869T | 1926-03-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR612869A true FR612869A (en) | 1926-11-03 |
Family
ID=8979118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR612869D Expired FR612869A (en) | 1926-03-17 | 1926-03-17 | Improvements to warning devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR612869A (en) |
-
1926
- 1926-03-17 FR FR612869D patent/FR612869A/en not_active Expired
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