CH69412A - Electric alarm device - Google Patents
Electric alarm deviceInfo
- Publication number
- CH69412A CH69412A CH69412A CH69412DA CH69412A CH 69412 A CH69412 A CH 69412A CH 69412 A CH69412 A CH 69412A CH 69412D A CH69412D A CH 69412DA CH 69412 A CH69412 A CH 69412A
- Authority
- CH
- Switzerland
- Prior art keywords
- alarm device
- electric alarm
- electric
- alarm
- Prior art date
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
- G04C21/305—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 by the hand(s) or handlike members closing the contacts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH69412T | 1914-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH69412A true CH69412A (en) | 1915-06-16 |
Family
ID=4317443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH69412A CH69412A (en) | 1914-11-20 | 1914-11-20 | Electric alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH69412A (en) |
-
1914
- 1914-11-20 CH CH69412A patent/CH69412A/en unknown
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