GB258025A - Improvements in and relating to telephone systems - Google Patents
Improvements in and relating to telephone systemsInfo
- Publication number
- GB258025A GB258025A GB1610425A GB1610425A GB258025A GB 258025 A GB258025 A GB 258025A GB 1610425 A GB1610425 A GB 1610425A GB 1610425 A GB1610425 A GB 1610425A GB 258025 A GB258025 A GB 258025A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- switchhook
- contacts
- meter
- winding
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/08—Indicating faults in circuits or apparatus
- H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1610425A GB258025A (en) | 1925-06-22 | 1925-06-22 | Improvements in and relating to telephone systems |
FR600183D FR600183A (fr) | 1925-06-22 | 1925-06-24 | Perfectionnements aux systèmes téléphoniques |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1610425A GB258025A (en) | 1925-06-22 | 1925-06-22 | Improvements in and relating to telephone systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB258025A true GB258025A (en) | 1926-09-16 |
Family
ID=10071248
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1610425A Expired GB258025A (en) | 1925-06-22 | 1925-06-22 | Improvements in and relating to telephone systems |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR600183A (fr) |
GB (1) | GB258025A (fr) |
-
1925
- 1925-06-22 GB GB1610425A patent/GB258025A/en not_active Expired
- 1925-06-24 FR FR600183D patent/FR600183A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR600183A (fr) | 1926-02-01 |
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