FR27449E - Improvements to electric alarms - Google Patents
Improvements to electric alarmsInfo
- Publication number
- FR27449E FR27449E FR27449DA FR27449E FR 27449 E FR27449 E FR 27449E FR 27449D A FR27449D A FR 27449DA FR 27449 E FR27449 E FR 27449E
- Authority
- FR
- France
- Prior art keywords
- electric alarms
- alarms
- electric
- 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
- G10K9/10—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by mechanical means only
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR27449T | 1923-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR27449E true FR27449E (en) | 1924-07-01 |
Family
ID=8665760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR27449D Expired FR27449E (en) | 1923-02-28 | 1923-02-28 | Improvements to electric alarms |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR27449E (en) |
-
1923
- 1923-02-28 FR FR27449D patent/FR27449E/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR575138A (en) | Improvements to electrical switches | |
FR762305A (en) | Improvements to electrical fuses | |
FR580321A (en) | Improvements to electrical switches | |
FR578711A (en) | Improvements to electrical switches | |
FR579844A (en) | Improvements to electrical switches | |
FR27449E (en) | Improvements to electric alarms | |
FR560702A (en) | Improvements to electric alarms | |
FR574871A (en) | Improvements to electric hoists | |
FR582145A (en) | Improvements to insulators | |
FR578243A (en) | Improvements to electrical switches | |
FR586594A (en) | Improvements to electrical switches | |
FR575766A (en) | Improvements to electric accumulators | |
FR587629A (en) | Improvements to electric cables | |
FR564047A (en) | Improvements to bioyclettes | |
FR589810A (en) | Improvements to thermo-siphons | |
FR568598A (en) | Improvements to parqueters | |
FR572322A (en) | Improvements to | |
FR547433A (en) | Improvements to electric alarms | |
FR584575A (en) | Improvements to electric horns | |
FR28793E (en) | Improvements to electric alarms | |
FR582815A (en) | Improvements to insulators | |
FR577790A (en) | Improvements to insulators | |
FR588284A (en) | Improvements to electric tachometers | |
FR574707A (en) | Improvements to electrical switches | |
FR575219A (en) | Improvements to electrical switches |