GB191501470A - Improvements in Automatic and Semi-automatic Telephone Systems. - Google Patents
Improvements in Automatic and Semi-automatic Telephone Systems.Info
- Publication number
- GB191501470A GB191501470A GB191501470DA GB191501470A GB 191501470 A GB191501470 A GB 191501470A GB 191501470D A GB191501470D A GB 191501470DA GB 191501470 A GB191501470 A GB 191501470A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- relays
- relay
- automatic
- code
- 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
Landscapes
- Telephonic Communication Services (AREA)
Abstract
1470. Relay Automatic Telephone Co., [formerly Betulander Automatic Telephone Co.], and Aitken, W. Jan. 29. Automatic and semiautomatic exchange systems.-In systems using line-finders composed of relays, each calling line has associated with it a relay adapted to earth certain code wires, according to the code of the calling line, thereby controlling the circuits of the line-finder relays, and each line-finder has associated with it a code - wire - switching relay adapted to switch the code wires on to the next line-finder as soon as the associated linefinder is engaged. Each junction has a set of relays 2E, 3E, 4E controlling its connexion to the calling line, and each subscriber's line relay 1E has its code contacts arranged to energize one or more of the relays 2E, 3E, 4E, when connected thereto by the assignor relays 6E, 10E, &c. individual to the separate junctions. Thus the line relay of line h is arranged to energize all three relays, while that of line h<1> energizes relay 2E only. The energized switching-relays 2E, 3E, 4E loclcup in circuits controlled by the calling line.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191501470T | 1915-01-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB191501470A true GB191501470A (en) | 1916-01-27 |
Family
ID=32673523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB191501470D Expired GB191501470A (en) | 1915-01-29 | 1915-01-29 | Improvements in Automatic and Semi-automatic Telephone Systems. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB191501470A (en) |
-
1915
- 1915-01-29 GB GB191501470D patent/GB191501470A/en not_active Expired
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