FR909690A - Electric call pendulum - Google Patents
Electric call pendulumInfo
- Publication number
- FR909690A FR909690A FR909690DA FR909690A FR 909690 A FR909690 A FR 909690A FR 909690D A FR909690D A FR 909690DA FR 909690 A FR909690 A FR 909690A
- Authority
- FR
- France
- Prior art keywords
- pendulum
- electric call
- call
- electric
- call pendulum
- 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
- G04C21/326—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 adjustable from the different places themselves
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR909690T | 1942-08-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR909690A true FR909690A (en) | 1946-05-15 |
Family
ID=9408158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR909690D Expired FR909690A (en) | 1942-08-08 | 1942-08-08 | Electric call pendulum |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR909690A (en) |
-
1942
- 1942-08-08 FR FR909690D patent/FR909690A/en not_active Expired
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