GB235064A - Improvements in or relating to telephone systems - Google Patents
Improvements in or relating to telephone systemsInfo
- Publication number
- GB235064A GB235064A GB2255324A GB2255324A GB235064A GB 235064 A GB235064 A GB 235064A GB 2255324 A GB2255324 A GB 2255324A GB 2255324 A GB2255324 A GB 2255324A GB 235064 A GB235064 A GB 235064A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- line switch
- call
- telephone systems
- case
- 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
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
235,064. Coventry Automatic Telephones, Ltd., and Collyer, J. E. Sept. 24, 1924. Automatic telephone systems.- A rotary line switch of the nonormal type advances a step upon release in the case of an unsuccessful call only. In the arrangement described, the line switch, Fig. 1, gives access to a group of two-wire trunks, and may be reached over one or more selectors. A repeater, Fig. 2, is associated with each trunk. A slow release relay 11 is connected in series with the usual switching relay 12, and in the case of an unsuccessful call, when relay 12 falls back, the magnet 7 is momentarily connected up over a wiper 20 before relay 11 and the line relav 1 relapse. If the call has been answered, a slow release relay 63 controlled by the reversing relay 59 is energized, and advance of the line switch is prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2255324A GB235064A (en) | 1924-09-24 | 1924-09-24 | Improvements in or relating to telephone systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2255324A GB235064A (en) | 1924-09-24 | 1924-09-24 | Improvements in or relating to telephone systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB235064A true GB235064A (en) | 1925-06-11 |
Family
ID=10181281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2255324A Expired GB235064A (en) | 1924-09-24 | 1924-09-24 | Improvements in or relating to telephone systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB235064A (en) |
-
1924
- 1924-09-24 GB GB2255324A patent/GB235064A/en not_active Expired
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