GB255130A - Improvements in automatic or semi-automatic telephone systems - Google Patents
Improvements in automatic or semi-automatic telephone systemsInfo
- Publication number
- GB255130A GB255130A GB697225A GB697225A GB255130A GB 255130 A GB255130 A GB 255130A GB 697225 A GB697225 A GB 697225A GB 697225 A GB697225 A GB 697225A GB 255130 A GB255130 A GB 255130A
- Authority
- GB
- United Kingdom
- Prior art keywords
- automatic
- semi
- operator
- marked
- busy
- 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
- H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Abstract
255,130. Standard Telephones & Cables, Ltd., (formerly Western Electric Co., Ltd.), and Lowry, L. P. March 14, 1925. Semi-automatic exchange systems. - An impulse-sending mechanism of the type which is temporarily associated with an operator's keyboard during the establishment of a connection is marked continuously busy during release until all the component parts are fully restored to normal. The mechanism has motor-driven interrupter-springs which are tested as to their operative condition each time the apparatus is taken into use and if they are faulty, i.e., either permanently open or permanently closed, an alarm is operated and the mechanism marked busy. If less than the full normal number of digits is set up, the call is routed to a special operator and the partial setting of the register is cancelled. The invention is described with reference to apparatus which forms part of the complete system described in Specification 254,183. Specifications 253,574 and 253,575 also are referred to.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB697225A GB255130A (en) | 1925-03-14 | 1925-03-14 | Improvements in automatic or semi-automatic telephone systems |
FR612702D FR612702A (en) | 1925-03-14 | 1926-03-12 | Improvements to automatic or semi-automatic telephone systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB697225A GB255130A (en) | 1925-03-14 | 1925-03-14 | Improvements in automatic or semi-automatic telephone systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB255130A true GB255130A (en) | 1926-07-14 |
Family
ID=9824189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB697225A Expired GB255130A (en) | 1925-03-14 | 1925-03-14 | Improvements in automatic or semi-automatic telephone systems |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR612702A (en) |
GB (1) | GB255130A (en) |
-
1925
- 1925-03-14 GB GB697225A patent/GB255130A/en not_active Expired
-
1926
- 1926-03-12 FR FR612702D patent/FR612702A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR612702A (en) | 1926-10-29 |
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