FR761850A - Improvements to electrical sound producing devices and, in particular, to electrical warning devices - Google Patents
Improvements to electrical sound producing devices and, in particular, to electrical warning devicesInfo
- Publication number
- FR761850A FR761850A FR761850DA FR761850A FR 761850 A FR761850 A FR 761850A FR 761850D A FR761850D A FR 761850DA FR 761850 A FR761850 A FR 761850A
- Authority
- FR
- France
- Prior art keywords
- electrical
- devices
- sound producing
- warning devices
- 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
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 |
---|---|---|---|
FR761850T | 1932-12-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR761850A true FR761850A (en) | 1934-03-28 |
Family
ID=9174550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR761850D Expired FR761850A (en) | 1932-12-23 | 1932-12-23 | Improvements to electrical sound producing devices and, in particular, to electrical warning devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR761850A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4534661A (en) * | 1977-08-25 | 1985-08-13 | Kabushiki Kaisha Suwa Seikosha | Electric alarm wristwatch including cylindrical sound tube for transmitting sound |
-
1932
- 1932-12-23 FR FR761850D patent/FR761850A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4534661A (en) * | 1977-08-25 | 1985-08-13 | Kabushiki Kaisha Suwa Seikosha | Electric alarm wristwatch including cylindrical sound tube for transmitting sound |
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