CH53859A - Electric alarm device - Google Patents
Electric alarm deviceInfo
- Publication number
- CH53859A CH53859A CH53859A CH53859DA CH53859A CH 53859 A CH53859 A CH 53859A CH 53859 A CH53859 A CH 53859A CH 53859D A CH53859D A CH 53859DA CH 53859 A CH53859 A CH 53859A
- 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 |
|---|---|---|---|
| CH53859T | 1911-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH53859A true CH53859A (en) | 1912-04-01 |
Family
ID=4292682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH53859A CH53859A (en) | 1911-01-23 | 1911-01-23 | Electric alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH53859A (en) |
-
1911
- 1911-01-23 CH CH53859A patent/CH53859A/en unknown
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