FR31093E - Alarm-memorandum-electric - Google Patents
Alarm-memorandum-electricInfo
- Publication number
- FR31093E FR31093E FR31093DA FR31093E FR 31093 E FR31093 E FR 31093E FR 31093D A FR31093D A FR 31093DA FR 31093 E FR31093 E FR 31093E
- Authority
- FR
- France
- Prior art keywords
- memorandum
- alarm
- 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
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C21/00—Producing acoustic time signals by electrical means
- G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
- G04C21/30—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times with provision for a number of operations at different times, e.g. ringing the bells in a school
- G04C21/32—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times with provision for a number of operations at different times, e.g. ringing the bells in a school giving indications at a number of places each at a different time, e.g. system of alarms in a hotel
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR31093T | 1925-10-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR31093E true FR31093E (en) | 1926-11-22 |
Family
ID=8668934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR31093D Expired FR31093E (en) | 1925-10-03 | 1925-10-03 | Alarm-memorandum-electric |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR31093E (en) |
-
1925
- 1925-10-03 FR FR31093D patent/FR31093E/en not_active Expired
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