FR459570A - Improvements to sirens and similar devices - Google Patents
Improvements to sirens and similar devicesInfo
- Publication number
- FR459570A FR459570A FR459570DA FR459570A FR 459570 A FR459570 A FR 459570A FR 459570D A FR459570D A FR 459570DA FR 459570 A FR459570 A FR 459570A
- 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
- G10K7/00—Sirens
- G10K7/02—Sirens in which the sound-producing member is rotated manually or by a motor
- G10K7/04—Sirens in which the sound-producing member is rotated manually or by a motor by an electric motor
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE459570X | 1912-07-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR459570A true FR459570A (en) | 1913-11-08 |
Family
ID=1499046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR459570D Expired FR459570A (en) | 1912-07-12 | 1913-06-23 | Improvements to sirens and similar devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR459570A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4908601A (en) * | 1987-07-27 | 1990-03-13 | Whelen Technologies, Inc. | Loud speaker with horizontal radiation pattern |
-
1913
- 1913-06-23 FR FR459570D patent/FR459570A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4908601A (en) * | 1987-07-27 | 1990-03-13 | Whelen Technologies, Inc. | Loud speaker with horizontal radiation pattern |
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