GB301843A - Improvements in or relating to telephone systems - Google Patents
Improvements in or relating to telephone systemsInfo
- Publication number
- GB301843A GB301843A GB36043/28A GB3604328A GB301843A GB 301843 A GB301843 A GB 301843A GB 36043/28 A GB36043/28 A GB 36043/28A GB 3604328 A GB3604328 A GB 3604328A GB 301843 A GB301843 A GB 301843A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relating
- telephone systems
- telegraph
- aug
- accepted
- 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
- H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
- H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
- H04Q3/625—Arrangements in the private branch exchange
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Meter Arrangements (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
301,843. Associated Telephone & Telegraph Co. Aug. 13, 1927, [Convention date]. Divided on 295,572. Drawings to Specification. Charging and discharging batteries. - The Specification as open to inspection under Sect. 91 (3) (a) describes the same charging system as in Specifications 295,572 and 301,844. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE301843X | 1927-08-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB301843A true GB301843A (en) | 1929-06-24 |
Family
ID=3867436
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB36043/28A Expired GB301843A (en) | 1927-08-13 | 1928-03-23 | Improvements in or relating to telephone systems |
Country Status (2)
Country | Link |
---|---|
US (1) | US1789606A (en) |
GB (1) | GB301843A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750213C (en) * | 1936-02-13 | 1944-12-20 | Circuit arrangement for telephone extension systems with dialer operation | |
FR954202A (en) * | 1946-10-11 | 1949-12-21 | Automatic Elect Lab | Automatic switching telephone system, especially for long distance calls |
US2636947A (en) * | 1949-12-16 | 1953-04-28 | Bell Telephone Labor Inc | Two-way trunk for pulse conversion systems |
US2690478A (en) * | 1951-05-10 | 1954-09-28 | Int Standard Electric Corp | Circuit arrangement for communication systems, in particular private automatic telephone branch exchanges |
US2897280A (en) * | 1956-12-26 | 1959-07-28 | Gen Telephone Lab Inc | Inter-office trunking system |
-
1928
- 1928-03-23 GB GB36043/28A patent/GB301843A/en not_active Expired
- 1928-03-23 US US264262A patent/US1789606A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US1789606A (en) | 1931-01-20 |
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