GB1290723A - - Google Patents
Info
- Publication number
- GB1290723A GB1290723A GB4856169A GB1290723DA GB1290723A GB 1290723 A GB1290723 A GB 1290723A GB 4856169 A GB4856169 A GB 4856169A GB 1290723D A GB1290723D A GB 1290723DA GB 1290723 A GB1290723 A GB 1290723A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relays
- digit
- final selector
- exchange
- pairs
- 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4856169 | 1969-10-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1290723A true GB1290723A (e) | 1972-09-27 |
Family
ID=10449050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4856169A Expired GB1290723A (e) | 1969-10-02 | 1969-10-20 |
Country Status (3)
Country | Link |
---|---|
US (1) | US3697704A (e) |
GB (1) | GB1290723A (e) |
ZA (1) | ZA706652B (e) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4250531A (en) * | 1979-08-30 | 1981-02-10 | Ahrens Walter C | Switch-arc preventing circuit |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL289634A (e) * | 1962-03-01 | |||
DE1179608B (de) * | 1963-04-23 | 1964-10-15 | Siemens Ag | Schaltungsanordnung zur UEbertragung von Zeichen ueber mehradrige Fernmeldeleitungen, insbesondere fuer Fernsprechanlagen |
AT245055B (de) * | 1964-11-04 | 1966-02-10 | Standard Telephon & Telegraph | Schaltungsanordnung zum Wählen eines Gesprächspartners mittels Wähltasten |
DE1487832A1 (de) * | 1966-07-07 | 1969-02-13 | Merk Gmbh Telefonbau Fried | Schaltungsanordnung zur Auswertung von Tastenwahlkennzeichen |
-
1969
- 1969-10-20 GB GB4856169A patent/GB1290723A/en not_active Expired
-
1970
- 1970-09-29 ZA ZA706652*A patent/ZA706652B/xx unknown
- 1970-10-01 US US77096A patent/US3697704A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US3697704A (en) | 1972-10-10 |
ZA706652B (en) | 1971-09-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |