CH107973A - Electric alarm clock for hotels, factories etc. - Google Patents
Electric alarm clock for hotels, factories etc.Info
- Publication number
- CH107973A CH107973A CH107973DA CH107973A CH 107973 A CH107973 A CH 107973A CH 107973D A CH107973D A CH 107973DA CH 107973 A CH107973 A CH 107973A
- Authority
- CH
- Switzerland
- Prior art keywords
- hotels
- alarm clock
- electric alarm
- factories etc
- factories
- 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
- G04C21/32—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
- G04C21/323—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 by the hand(s) or handlike members closing the contacts
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH107973T | 1923-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH107973A true CH107973A (en) | 1924-12-01 |
Family
ID=4366958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH107973D CH107973A (en) | 1923-07-05 | 1923-07-05 | Electric alarm clock for hotels, factories etc. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH107973A (en) |
-
1923
- 1923-07-05 CH CH107973D patent/CH107973A/en unknown
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