DE297265C - - Google Patents
Info
- Publication number
- DE297265C DE297265C DENDAT297265D DE297265DA DE297265C DE 297265 C DE297265 C DE 297265C DE NDAT297265 D DENDAT297265 D DE NDAT297265D DE 297265D A DE297265D A DE 297265DA DE 297265 C DE297265 C DE 297265C
- Authority
- DE
- Germany
- Prior art keywords
- electromagnet
- line
- battery
- telephone line
- connection
- 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.)
- Active
Links
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/68—Circuit arrangements for preventing eavesdropping
- H04M1/70—Lock-out or secrecy arrangements in party-line systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE301083T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE297265C true DE297265C (cs) |
Family
ID=6097847
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT297265D Active DE297265C (cs) | |||
| DENDAT301083D Active DE301083C (cs) |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT301083D Active DE301083C (cs) |
Country Status (1)
| Country | Link |
|---|---|
| DE (2) | DE301083C (cs) |
-
0
- DE DENDAT297265D patent/DE297265C/de active Active
- DE DENDAT301083D patent/DE301083C/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE301083C (cs) |
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