FR485924A - Improvements to sirens and other similar devices - Google Patents
Improvements to sirens and other similar devicesInfo
- Publication number
- FR485924A FR485924A FR485924DA FR485924A FR 485924 A FR485924 A FR 485924A FR 485924D A FR485924D A FR 485924DA FR 485924 A FR485924 A FR 485924A
- Authority
- FR
- France
- Prior art keywords
- sirens
- similar devices
- similar
- 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
- G10K9/02—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
- G10K9/04—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 by compressed gases, e.g. compressed air
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE485924X | 1916-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR485924A true FR485924A (en) | 1918-02-20 |
Family
ID=1522580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR485924D Expired FR485924A (en) | 1916-06-30 | 1917-06-25 | Improvements to sirens and other similar devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR485924A (en) |
-
1917
- 1917-06-25 FR FR485924D patent/FR485924A/en not_active Expired
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