DE255386C - - Google Patents
Info
- Publication number
- DE255386C DE255386C DENDAT255386D DE255386DA DE255386C DE 255386 C DE255386 C DE 255386C DE NDAT255386 D DENDAT255386 D DE NDAT255386D DE 255386D A DE255386D A DE 255386DA DE 255386 C DE255386 C DE 255386C
- Authority
- DE
- Germany
- Prior art keywords
- relay
- circuit
- ringing current
- subscriber
- contact
- 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
- 230000005284 excitation Effects 0.000 claims description 3
- 230000002028 premature Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 108060008443 TPPP Proteins 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
- H04M3/62—Keyboard equipment
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE255386C true DE255386C (no) |
Family
ID=513495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT255386D Active DE255386C (no) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE255386C (no) |
-
0
- DE DENDAT255386D patent/DE255386C/de active Active
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